WO2023082812A1 - 一种终端天线系统及电子设备 - Google Patents

一种终端天线系统及电子设备 Download PDF

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Publication number
WO2023082812A1
WO2023082812A1 PCT/CN2022/117659 CN2022117659W WO2023082812A1 WO 2023082812 A1 WO2023082812 A1 WO 2023082812A1 CN 2022117659 W CN2022117659 W CN 2022117659W WO 2023082812 A1 WO2023082812 A1 WO 2023082812A1
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WIPO (PCT)
Prior art keywords
radiator
antenna
antenna system
frequency band
electronic device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/117659
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English (en)
French (fr)
Inventor
李少博
胡义武
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honor Device Co Ltd
Original Assignee
Honor Device Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honor Device Co Ltd filed Critical Honor Device Co Ltd
Priority to US18/266,959 priority Critical patent/US20230420827A1/en
Priority to EP22891617.7A priority patent/EP4250478B1/en
Publication of WO2023082812A1 publication Critical patent/WO2023082812A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the present application relates to the technical field of antennas, in particular to a terminal antenna system and electronic equipment.
  • Adjacent arrangement of antennas may lead to mutual influence between antennas, thereby causing degradation of antenna performance.
  • Embodiments of the present application provide a terminal antenna system and electronic equipment, which can effectively reduce mutual influence between adjacent antennas through the design of a common ground point.
  • the distributed capacitance design can also be used to stimulate new modes and increase the bandwidth of single-frequency antennas.
  • hardware costs can be reduced. Therefore, the wireless communication function of the electronic device is better supported.
  • a terminal antenna system is provided.
  • the terminal antenna system is set in an electronic device.
  • the terminal antenna system includes: a first radiator and a second radiator, a first end of the first radiator and the second The first end of the radiator is coupled through the slot.
  • a first feeding point is set on the second end of the first radiating body away from the second radiating body, and a first grounding point is also set on the first radiating body.
  • the second end of the second radiator is provided with a second feeding point, and the second end of the second radiator is an end point away from the first radiator.
  • a terminal antenna system solution based on a common antenna design is provided.
  • the two adjacent antennas are the left-hand antenna implementing the GPS antenna and the IFA antenna covering the N41 and N78 frequency bands respectively.
  • the ground point at the end of the left-hand antenna can be shared with the ground point of the IFA antenna, which is the first ground point in this solution.
  • the effect of distributed capacitance is realized through the gap, and the CM mode and DM mode can be used to replace the radiation mode on the original IFA antenna to obtain better radiation effect.
  • the effect of distributed capacitance is realized through the gap, and the radiator corresponding to one pole of the distributed capacitance can also expand the radiator area of the GPS antenna, and at the same time stimulate new modes to expand the left-hand resonance and expand the coverage bandwidth of the GPS antenna , thereby reducing the requirements for mass production consistency.
  • the first radiator includes a first part and a second part, the first part and the second part are connected in an L shape, and the gap is arranged between the second part and the second radiator , the first grounding point is set on the first part.
  • the first radiator may be divided into a first part and a second part according to different directions on the electronic device.
  • the first part can be set on the top side
  • the second part can be set on the side.
  • the first distance (Y2) is set within the range of 2 mm to 4 mm, and the first distance (Y2) is the distance between the first part of the first radiator and the reference ground.
  • the first length (Y3) which is the length of the second portion of the first radiator, is set within a range of 5mm to 15mm.
  • the slit width (X2) is set within a range of 0.2 mm to 1.2 mm. Based on this scheme, the ranges of three critical dimensions in this scheme are defined. For example, the distance Y2 between the radiator of the left-hand antenna arranged on the top and the reference ground, by setting Y2 within the above range, can better excite the balanced mode so as to expand the bandwidth of the left-hand resonance.
  • the length Y3 of the radiator connected to the left-hand antenna arranged on the side can be set within the above range, so as to realize the tuning of the frequency band where the N41 resonates.
  • the width X2 of the slit arranged on the side can be set within the above range, so as to realize the tuning of the frequency band where the N41 and N78 resonate.
  • the terminal antenna system includes a first antenna and a second antenna, and a radiator of the first antenna is the first radiator.
  • the radiator of the second antenna includes: the second radiator, the second part of the first radiator, and the radiator between the second part on the first radiator and the first grounding point.
  • a capacitor is further arranged between the first feeding point and the first radiator, and the capacitor is used to excite the left-handed mode of the first antenna.
  • the first antenna when the terminal antenna system is working, covers the first frequency band, the second antenna covers the second frequency band and the third frequency band, and the resonance position of the second frequency band is lower than that of the first frequency band .
  • the first antenna may be used to cover a frequency band, such as a GPS frequency band.
  • the second antenna can be used to cover two frequency bands, such as N41 and N78.
  • the slot width X2 is used to adjust the resonance positions of the second frequency band and the third frequency band.
  • the first length Y3 is used to adjust the resonance position of the second frequency band.
  • the modes of the first antenna covering the first frequency band include a left-handed mode and a balanced mode
  • the first distance Y2 is used to adjust the resonance position of the balanced mode.
  • the first frequency band includes a GPS frequency band
  • the second frequency band includes 2.5 GHz to 2.7 GHz
  • the third frequency band includes 3.3 GHz to 3.8 GHz.
  • the first frequency band may include a GPS frequency band
  • the GPS frequency band includes 1575 MHz, and/or Beidou, and/or a positioning frequency band required by positioning systems such as Galileo.
  • the second frequency band and the third frequency band may include N41 and N78 frequency bands respectively.
  • the terminal antenna system is arranged at the corner of the electronic device, wherein the first part of the first radiator is arranged at the top or bottom of the electronic device, and the second part of the first radiator and the The second radiator is arranged on the side of the electronic device.
  • the first part of the first radiator is arranged on the side of the electronic device, and the second part of the first radiator and the second radiator are arranged on the top or bottom of the electronic device.
  • a setting position of a terminal antenna system is provided.
  • the terminal antenna system can be arranged at a corner of an electronic device (such as a mobile phone) so as to obtain a better radiation environment.
  • an electronic device is provided, and the electronic device is configured with the terminal antenna system as described in the first aspect and any possible design thereof.
  • the electronic device transmits or receives signals, it transmits or receives signals through the terminal antenna system.
  • Fig. 1 is a schematic diagram of the positions of two adjacent antennas arranged in a mobile phone
  • Fig. 2 is a simulation schematic diagram of an antenna with a schematic position as shown in Fig. 1;
  • Fig. 3 is a simulation schematic diagram of another antenna having a schematic position as shown in Fig. 1;
  • Fig. 4 is a comparative schematic diagram of two antenna systems
  • Fig. 5 is a schematic diagram of S-parameter simulation comparison of the two antenna systems shown in Fig. 4;
  • FIG. 6 is a schematic diagram of the composition of an electronic device provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of an antenna solution provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of dimensions of an antenna solution provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of division of an antenna scheme provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of S parameters and current simulation of the antenna scheme provided by the embodiment of the present application.
  • FIG. 11 is a schematic diagram of S parameters and current simulation of the antenna scheme provided by the embodiment of the present application.
  • Fig. 12 is a schematic diagram comparing the S parameters of the antenna scheme provided by the embodiment of the present application with the existing scheme;
  • Fig. 13 is a schematic diagram comparing the S parameters of the antenna scheme provided by the embodiment of the present application with the existing scheme;
  • FIG. 14 is a comparative schematic diagram of an antenna system provided by an embodiment of the present application.
  • FIG. 15 is a schematic diagram of S-parameter simulation of the two antenna systems as shown in FIG. 14 provided by the embodiment of the present application.
  • the number of antennas in electronic equipment is also increasing.
  • a 5G antenna needs to be added to the existing antenna in the mobile phone.
  • the existing antenna may include a GPS antenna for positioning and the like.
  • FIG. 1 shows a GPS antenna and a 5G antenna used to cover N41 and N78 in the 5G frequency band in a mobile phone.
  • N41 can correspond to the working frequency band of 2.5GHz-2.7GHz
  • N78 can correspond to the working frequency band of 3.3GHz-3.8GHz.
  • antenna A may be a GPS antenna
  • antenna B may be a 5G antenna covering N41 and N78.
  • Antenna A may be in the form of a left-handed antenna.
  • the antenna A may include a radiator, one end of the radiator may be connected to the feeding point F a through a capacitor C a , and the other end of the radiator may be grounded through Ga .
  • the grounded end of the radiator may be an end close to the corner of the mobile phone, so as to better excite the floor eigenmode and improve the radiation efficiency of the left-handed mode.
  • the structure of the left-hand antenna can refer to CN201380008276.8 and CN201410109571.9, and will not be repeated here.
  • the current simulation and the corresponding S-parameter simulation during the working process of the antenna A are illustrated. It can be seen that through the excitation of F a , a unidirectional (eg, leftward) current can be formed on the radiator. This forms the left-handed mode radiation. It can be seen from the S parameters that the deepest point of S11 has exceeded -20dB, and the corresponding radiation efficiency and system efficiency are also higher than -5dB.
  • Antenna B may be in the form of an IFA antenna.
  • the antenna B may include a radiator, and one end of the radiator may be suspended in the air.
  • a feeding point F b may be set on the radiator.
  • a capacitor C b may be provided between the feeding point F b and the radiator for exciting the left-handed mode.
  • the suspended end of the radiator may be an end close to the corner of the mobile phone, thereby making the end space of the IFA antenna more open, thereby obtaining better radiation performance.
  • the current simulation and the corresponding S-parameter simulation during the working process of the antenna B are illustrated. It can be seen that through the excitation of F b , the left-handed mode can be excited on the radiator between the feed point and the ground point, thereby covering the N41 frequency band, and its radiation efficiency and system efficiency are both over -4dB.
  • the IFA mode (such as the IFA mode of 1/4 wavelength) can also be excited on the radiator. This IFA mode can be used to cover the N78 frequency band, and its radiation efficiency and system efficiency both exceed -2dB.
  • the working frequency band of N41 covers a bandwidth of 200MHz
  • the working frequency band of N78 covers a bandwidth of 500MHz.
  • the performance of the two resonances generated by the antenna B is relatively good at the deepest point, its bandwidth is insufficient.
  • the performance of the band edge There is a noticeable drop in performance compared to the center of the band.
  • the open end of the radiator of antenna B is set at the corner of the mobile phone, it is close to the ground point of antenna A.
  • the open end is a point with a large electric field, and the existence of a ground point near the large point of the electric field will significantly affect the clearance of the IFA antenna, thereby affecting the radiation performance of the IFA antenna. Therefore, in the above simulation results, the problem of insufficient bandwidth of antenna B also arises.
  • the first antenna system shown in (a) in FIG. 4 is an antenna system composed of antenna A and antenna B as shown in FIG. 1 .
  • the second antenna system shown in (b) in FIG. 4 is an antenna system in which only antenna B remains after antenna A is removed.
  • FIG. 5 is a schematic diagram of simulation of S11 of the two antenna systems shown in FIG. 4 .
  • the second antenna system after removing antenna A that is, the GPS antenna
  • its S11 has a significant improvement in the N41 and N78 frequency bands.
  • the N41 band the bandwidth of the S11 increases, and the deepest point becomes deeper.
  • the N41 frequency band is mainly covered by the left-handed mode, due to the improvement of the overall antenna clearance, no frequency deviation will occur in the resonance, but the radiation performance will be directly improved.
  • the bandwidth of the S11 increases, and the deepest point becomes deeper.
  • the resonance has a large change due to the improvement of the overall antenna clearance. While improving the bandwidth and depth of the S11, due to the large electric field near the end of the floor setting There will also be significant frequency deviations. Therefore, the influence of antenna A on antenna B is very significant.
  • antenna B Due to the large number of antennas on the mobile phone and the limited space, among adjacent antennas, it is common that the end of antenna B is close to the ground point of antenna A. In this way, the radiation performance of antenna B will be significantly limited, thereby affecting the communication performance of N41 and N78.
  • the antenna A is a GPS antenna
  • the antenna B is an NR antenna (that is, a 5G antenna) covering N41 and N78 as an example.
  • NR antenna that is, a 5G antenna
  • the embodiment of the present application provides an antenna solution, by sharing the ground point, improving the structure of the NR antenna, and covering the frequency band corresponding to the NR antenna through a new mode.
  • the influence of the ground point of the adjacent antenna on the performance of the NR antenna can be significantly reduced.
  • due to the structural setting of the NR antenna it can also stimulate a new mode to cover the working frequency band of the adjacent antenna, so as to achieve the effect of expanding its bandwidth and improving the radiation performance.
  • the NR antenna covers N41 and N78 and the adjacent antenna is a GPS antenna.
  • the antenna solution provided in the embodiment of the present application may be applied in a user's electronic device to support a wireless communication function of the electronic device.
  • the electronic device may be a portable mobile device such as a mobile phone, a tablet computer, a personal digital assistant (personal digital assistant, PDA), an augmented reality (augmented reality, AR)/virtual reality (virtual reality, VR) device, a media player, etc.
  • PDA personal digital assistant
  • AR augmented reality
  • VR virtual reality
  • the electronic device may also be a wearable electronic device such as a smart watch.
  • the embodiment of the present application does not specifically limit the specific form of the device.
  • an electronic device is a mobile phone as an example, and an environment provided by the antenna solution provided by the embodiment of the present application will be described.
  • the structural implementation of the antenna solution may be called an antenna system, or a terminal antenna system.
  • FIG. 6 is a schematic structural diagram of an electronic device 600 provided in an embodiment of the present application.
  • the electronic device 600 provided by the embodiment of the present application can be provided with a screen and a cover 601 , a metal shell 602 , an internal structure 603 , and a rear cover 604 in sequence along the z-axis from top to bottom.
  • the screen and the cover 601 can be used to realize the display function of the electronic device 600 .
  • the metal casing 602 can be used as a main frame of the electronic device 600 to provide rigid support for the electronic device 600 .
  • the internal structure 603 may include a collection of electronic components and mechanical components that implement various functions of the electronic device 600 .
  • the internal structure 603 may include a shield, screws, reinforcing ribs and the like.
  • the rear cover 604 may be the exterior surface of the back of the electronic device 600, and the rear cover 604 may use glass materials, ceramic materials, plastics, etc. in different implementations.
  • the antenna solution provided in the embodiment of the present application can be applied to the electronic device 600 shown in FIG. 6 , and is used to support the wireless communication function of the electronic device 600 .
  • the antenna involved in the antenna solution may be disposed on the metal casing 602 of the electronic device 600 .
  • the antenna involved in the antenna solution may be disposed on the rear cover 604 of the electronic device 600 and the like.
  • the antenna may be implemented in combination with a metal frame on the metal casing 602 as shown in FIG. 6 .
  • the antenna solution can also be implemented by using a flexible printed circuit (Flexible Printed Circuit, FPC), anodized die-casting (Metalframe Diecasting for Anodicoxidation, MDA) and other methods.
  • FPC Flexible Printed Circuit
  • MDA Metalframe Diecasting for Anodicoxidation
  • the antenna solution may also be obtained by combining at least two of the foregoing implementation manners.
  • the embodiment of the present application does not limit the specific implementation form of the magnetic current loop monopole antenna.
  • the FPC may include a non-conductive substrate on which a conductive layer may be disposed.
  • the conductive layer can be metal or other conductive materials.
  • the metal can be copper or silver, among others.
  • the radiator of the antenna system is obtained by adjusting the structure of the conductive layer.
  • FIG. 7 shows a schematic diagram of an antenna system 700 provided by an embodiment of the present application.
  • the antenna system 700 can be set at the corners of the electronic device (such as a mobile phone), such as the upper left corner, the lower left corner, the upper right corner, the lower right corner, etc. in the back view.
  • the antenna system 700 is disposed at the upper left corner of the back view of the mobile phone as an example.
  • the radiator of the antenna system 700 may include a first radiator and a second radiator.
  • the first and second radiators may be coupled through a gap in a distributed capacitance structure.
  • the first radiator can be divided into a first part and a second part according to different sides of the electronic device.
  • the first part may be a part of the radiator disposed on the top edge of the mobile phone.
  • the second part may be a part of the first radiator disposed on the side of the mobile phone.
  • the end close to the second radiator may be referred to as a first end of the first radiator.
  • the end close to the first radiator may be referred to as the first end of the second radiator.
  • the end far away from the second radiator may be referred to as the second end of the first radiator.
  • the end far away from the first radiator may be referred to as the second end of the second radiator.
  • a feed point F1 may be set at its right end (such as the second end).
  • a grounding point G1 (eg, referred to as a first grounding point) may also be provided on the first part.
  • the feed point F2 can be capacitively connected to the radiator, thereby exciting the left-handed mode to cover the GPS frequency band.
  • the second radiator may be a part of the radiator arranged on the side of the mobile phone and not connected to the first radiator.
  • a feeding point F2 may be provided at an end on the second radiator (such as the second end of the second radiator).
  • the gap between the second radiator and the first part of the first radiator may be a distributed capacitance structure.
  • the distributed capacitance structure may be realized through S-shaped through-slits or Z-shaped through-slits.
  • the structure of the antenna system 700 shown in FIG. 7 is only an example, and does not constitute a limitation on the shape or size of the antenna. In different examples, the antenna system 700 may also have other deformed shapes.
  • the various structural dimensions of the antenna system 700 may be included in the following ranges:
  • the X-direction length X3 may be set within a range of 30mm up and down 20%.
  • the width Y1 in the Y direction can be set within a range of 5mm up and down 20%.
  • the distance Y2 (also referred to as the first distance) between the first portion on the first radiator and the reference ground may be set within a range of 2 mm to 4 mm.
  • the balanced mode can be better excited so as to extend the bandwidth of the GPS resonance.
  • the length Y3 also referred to as the first length
  • the resonance position of N41 can be adjusted.
  • the Y-direction length Y4 from the end of the radiator to the top edge of the reference ground may be set within a range of 14mm up and down 20%.
  • the X-direction width of the radiator can be set within a range of 5mm up and down 20%.
  • the gap width X2 between the first radiator and the second radiator may be set within a range of 0.2 mm to 1.2 mm. By adjusting the specific size of X2 within the above range, fine adjustment of the resonance positions of N41 and N78 can be realized.
  • the antenna system 700 with the structure shown in FIG. 8 can feed in GPS signals through F1 and feed in corresponding signals of N41 and N78 through F2 during operation. This enables the antenna system 700 to transmit and receive wireless signals of corresponding frequency bands by covering the radiation of the GPS frequency band, N41 and N78 frequency bands respectively.
  • the antenna system provided in the embodiment of the present application may include two co-located sub-antennas.
  • the antenna system may include a first antenna for covering the GPS frequency band, and a second antenna for covering the N41 and N78 frequency bands.
  • the radiator of the first antenna may include a first radiator.
  • the first antenna can be used for transmitting and receiving GPS signals.
  • the radiator of the second antenna may include the second radiator of the antenna system, and the radiator on the first radiator between the first ground point G1 and the second radiator. That is to say, the radiator of the second antenna may include the second radiator, the second part of the first radiator, and the radiator in the first part of the first radiator from the ground point to an end close to the second radiator. .
  • the second antenna can be used to transmit and receive signals corresponding to N41 and N78.
  • the ground point G1 is shared by the first antenna and the second antenna. Compared with the existing antenna scheme (the antenna scheme shown in Figure 1), the shared ground point can be realized, which can save the space occupied in the process of setting multiple ground points, and can save the hardware cost corresponding to one ground point at the same time overhead.
  • the division of the first antenna and the second antenna as shown in FIG. 9 is only a logical division.
  • the radiator of the first antenna may also include other parts than the radiator of the first antenna as shown in FIG. 9 . Since the current of the GPS signal on other parts is relatively weak, the contribution to the sending and receiving of the GPS signal is relatively weak.
  • the radiator of the second antenna may also include other parts than the radiator of the second antenna as shown in FIG. 9 . Since the current of signals on other parts is relatively weak, the contribution to the sending and receiving of signals corresponding to N41 and N78 is relatively weak.
  • the antenna system with the composition shown in any one of FIGS. 7-9 can provide better radiation performance under the same antenna area.
  • N41 and N78 provide better bandwidth coverage, and better radiation efficiency and system efficiency.
  • the effect that the antenna solution provided by the embodiment of the present application can achieve is described below in combination with the simulation situation of S parameters and efficiency, and the comparison with existing antennas.
  • FIG. 10 shows the current simulation and the corresponding S-parameter simulation when the first antenna (that is, the GPS antenna) is working.
  • the first antenna that is, the GPS antenna
  • a current in the same direction can be excited on the radiator between the feed point and the ground point, that is, the left-handed mode can be obtained by excitation.
  • the deepest resonance point of the left-hand mode is close to -20dB, and the -6dB bandwidth exceeds 300MHz.
  • the first antenna can also excite the balanced mode, and the resonance corresponding to the balanced mode can be located near 2 GHz as shown in the S-parameter simulation in FIG. 10 .
  • the S11 of the balanced mode is not very significant, it can play a role in widening the resonance efficiency bandwidth of the left-handed mode.
  • the system efficiency near 2GHz is already close to -4dB.
  • the bandwidth generally required by the GPS antenna is relatively narrow, by widening the efficiency bandwidth, it can effectively avoid the situation of drastic performance fluctuations caused by subtle mass production inconsistencies.
  • Fig. 11 shows the current simulation and the corresponding S-parameter simulation when the second antenna (ie, NR antenna) is working.
  • the second antenna when the second antenna is in operation, it can separately excite the common mode (CM) mode and the differential mode (DM) mode.
  • CM common mode
  • DM differential mode
  • CM mode common mode
  • the reverse current when distributed on the second antenna radiator with the distributed capacitor structure as the boundary, it can correspond to the DM mode.
  • the N41 frequency band is thus covered by the resonance of the CM mode
  • the N78 frequency band is covered by the resonance of the DM mode. From the efficiency simulation curve, it can be seen that the radiation efficiency and system efficiency both reach above -2dB.
  • Figure 10 and Figure 11 respectively illustrate the current distribution and radiation conditions of the antenna scheme provided by the embodiment of the present application.
  • the following combines the existing antenna shown in Figure 1 to describe the effect that the scheme provided by the embodiment of the present application can achieve Make a comparative description.
  • the performance comparison between the antenna solution provided by the embodiment of the present application and the existing antenna solution in the GPS frequency band is shown.
  • (a) of FIG. 12 it is a comparison diagram of S11. It can be seen that due to the addition of the balanced mode, the bandwidth of the resonance S11 of the scheme of the present application is significantly better than that of the existing scheme.
  • the radiation efficiency is improved in the frequency band corresponding to the balanced mode (for example, around 2 GHz), and the improvement is more obvious in terms of system efficiency. For example, an increase of more than 2dB near 2GHz.
  • performance comparison between the antenna solution provided by the embodiment of the present application and the existing antenna solution in the NR frequency band (such as N41 and N78) is performed.
  • (a) of FIG. 13 it is a comparison diagram of S11. It can be seen that the resonance S11 bandwidth of the scheme of the present application is significantly better than that of the existing scheme.
  • the radiation efficiency is improved by covering N41 and N78 in the CM mode and the DM mode, and the improvement is more obvious in terms of system efficiency. For example, an increase of more than 2dB near 4GHz.
  • the performance of the NR antenna is degraded due to the influence of the grounding point of the GPS antenna.
  • the ground point of the adjacent antenna (such as the GPS antenna) can be prevented from being close to the end of the NR antenna while the area of the radiator is increased. cause performance degradation.
  • the antenna system provided by the embodiment of the present application that is, the third antenna system shown in (a) in Fig. 14
  • the NR antenna such as the IFA antenna form
  • the performance of the antenna system is compared to prove the above effect.
  • FIG. 15 it is a schematic illustration of the efficiency simulation comparison of the two antenna systems shown in FIG. 14 in the N41 and N78 frequency bands. It can be seen that, whether it is radiation efficiency or system efficiency, the performance of the antenna solution provided by the embodiment of the present application is basically equivalent to that of the NR antenna composed of a single IFA without the influence of GPS. Therefore, the antenna solution provided in the embodiment of the present application can effectively avoid the influence of the GPS antenna on the performance of the NR antenna.

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Abstract

本申请实施例公开了一种终端天线系统及电子设备，涉及天线技术领域，有效降低相邻天线之间的互相影响。具体方案为：该终端天线系统包括：第一辐射体和第二辐射体，该第一辐射体的第一端和该第二辐射体的第一端通过缝隙耦接。该第一辐射体上远离该第二辐射体的第二端设置有第一馈电点，该第一辐射体上还设置有第一接地点。该第二辐射体的第二端设置有第二馈电点，该第二辐射体的第二端为远离该第一辐射体的端点。

Description

一种终端天线系统及电子设备
本申请要求于2021年11月12日提交国家知识产权局、申请号为202111340312.3、发明名称为“一种终端天线系统及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及天线技术领域，尤其涉及一种终端天线系统及电子设备。
背景技术
随着电子设备的发展，电子设备中的天线数量越来越多，此外，电子设备中能够设置天线的空间则越来越有限。这样，就会不可避免地导致天线的相邻设置。
天线的相邻设置可能导致天线之间的互相影响，从而引起天线性能的下降。
发明内容
本申请实施例提供一种终端天线系统及电子设备，能够通过共接地点的设计，有效降低相邻天线之间的互相影响。此外，还可以通过分布式电容设计，激励新的模式，提升单频天线的带宽。同时可以降低硬件成本。由此更好地支持电子设备的无线通信功能。
为了达到上述目的，本申请实施例采用如下技术方案：
第一方面，提供一种终端天线系统，该终端天线系统设置在电子设备中，该终端天线系统包括：第一辐射体和第二辐射体，该第一辐射体的第一端和该第二辐射体的第一端通过缝隙耦接。该第一辐射体上远离该第二辐射体的第二端设置有第一馈电点，该第一辐射体上还设置有第一接地点。该第二辐射体的第二端设置有第二馈电点，该第二辐射体的第二端为远离该第一辐射体的端点。
基于该方案，提供一种共体天线设计的终端天线系统方案。在本示例中，以相邻的两个天线分别为实现GPS天线的左手天线以及覆盖N41和N78频段的IFA天线为例。左手天线末端的接地点可以与IFA天线的接地点共用，即该方案中的第一接地点。另外，通过缝隙的方式实现分布式电容的效果，能够使用CM模式以及DM模式代替原先的IFA天线上的辐射模式，获取更好的辐射效果。此外，通过缝隙的方式实现分布式电容的效果，该分布式电容的一极对应的辐射体还可以扩展GPS天线的辐射体面积，同时激励新的模式以便扩展左手谐振，扩展GPS天线的覆盖带宽，从而降低对量产一致性的要求。
在一种可能的设计中，该第一辐射体包括第一部分和第二部分，该第一部分和该第二部分呈L形连接，该缝隙设置在该第二部分与该第二辐射体之间，该第一接地点设置在该第一部分上。基于该方案，提供了一种具体的第一辐射体在电子设备上的分布形式。在本示例中，第一辐射体上可以按照电子设备上不同方向的设置划分为第一部分和第二部分。比如，第一部分可以设置在顶边，第二部分就可以设置在侧边。
在一种可能的设计中，第一距离(Y2)设置在2mm到4mm的范围内，该第一距离(Y2)是该第一辐射体的第一部分到参考地之间的距离。第一长度(Y3)设置在5mm 到15mm的范围内，该第一长度(Y3)是该第一辐射体的第二部分的长度。该缝隙宽度(X2)设置在0.2mm到1.2mm的范围内。基于该方案，限定了该方案中的三个关键尺寸的范围。比如，设置在顶部的左手天线的辐射体与参考地之间的距离Y2，通过将该Y2设置在上述范围内，能够较好地激励平衡模，以便扩展左手谐振的带宽。设置在侧边的与左手天线连接的辐射体的长度Y3可以设置在上述范围内，以便于实现对N41谐振所在频段的调谐。设置在侧边的缝隙的宽度X2可以设置在上述范围内，以便于实现对N41以及N78谐振所在频段的调谐。
在一种可能的设计中，该终端天线系统包括第一天线和第二天线，该第一天线的辐射体为该第一辐射体。该第二天线的辐射体包括：该第二辐射体，该第一辐射体的第二部分，以及该第一辐射体上第二部分到该第一接地点之间的辐射体。基于该方案，提供了一种具体的天线系统的逻辑划分。比如，可以划分为两个天线，分别用于实现GPS的覆盖，以及NR频段的覆盖。
在一种可能的设计中，该第一馈电点和该第一辐射体之间还设置有电容，该电容用于激励该第一天线的左手模式。基于该方案，提供了一种实现第一天线辐射机制的可能示例。比如，可以通过串联电容，实现激励第一天线上的左手模式的效果。
在一种可能的设计中，该终端天线系统工作时，该第一天线覆盖第一频段，该第二天线覆盖第二频段和第三频段，该第二频段的谐振位置低于该第一频段。基于该方案，提供了一种终端天线系统工作情况的说明。比如，第一天线可以用于覆盖一个频段，比如GPS频段。又如，第二天线可以用于覆盖两个频段，比如N41和N78。
在一种可能的设计中，缝隙宽度X2用于调节该第二频段和该第三频段的谐振位置。第一长度Y3用于调节该第二频段的谐振位置。基于该方案，提供了一种调整第一频段，第二频段对应谐振位置的方案示例。比如可以通过调整X2和/或Y3实现对谐振位置的精确调整。
在一种可能的设计中，该第一天线覆盖该第一频段的模式包括左手模式和平衡模，第一距离Y2用于调节该平衡模的谐振位置。基于该方案，提供了一种第一天线扩展带宽的机制说明。比如，第一天线为GPS时，本申请实施例提供的第一天线可以激励左手模式覆盖GPS频段，同时还可以通过平衡模，扩展该左手模式的带宽。在一些实现中，可以通过调整Y2实现对平衡模的激励以及调整。
在一种可能的设计中，该第一频段包括GPS频段，该第二频段包括2.5GHz到2.7GHz，该第三频段包括3.3GHz到3.8GHz。基于该方案，提供了一种该天线系统覆盖频段的限定。比如，第一频段可以包括GPS频段，该GPS频段包括1575MHz，和/或北斗，和/或伽利略等定位系统所要求的定位频段。该第二频段和第三频段可以分别包括N41以及N78频段。
在一种可能的设计中，该终端天线系统设置在该电子设备的角落，其中，该第一辐射体的第一部分设置在该电子设备的顶部或底部，该第一辐射体的第二部分和该第二辐射体设置在该电子设备的侧部。或者，该第一辐射体的第一部分设置在该电子设备的侧部，该第一辐射体的第二部分和该第二辐射体设置在该电子设备的顶部或底部。基于该方案，提供了一种终端天线系统的设置位置。该终端天线系统可以设置在电子设备(如手机)的角落，以便获取较好的辐射环境。
第二方面，提供一种电子设备，该电子设备设置有如第一方面及其任一种可能的设计中所述的终端天线系统。该电子设备在进行信号发射或接收时，通过该终端天线系统进行信号的发射或接收。
应当理解的是，上述第二方面提供的技术方案，其技术特征均可对应到第一方面及其可能的设计中提供的终端天线系统，因此能够达到的有益效果类似，此处不再赘述。
附图说明
图1为一种手机中设置的两个相邻天线的位置示意图；
图2为具有如图1所示位置示意的天线的仿真示意图；
图3为具有如图1所示位置示意的另一个天线的仿真示意图；
图4为两种天线系统的对比示意图；
图5为图4所示两种天线系统的S参数仿真对比示意图；
图6为本申请实施例提供的一种电子设备的组成示意图；
图7为本申请实施例提供的一种天线方案的结构示意图；
图8为本申请实施例提供的一种天线方案的尺寸标注示意图；
图9为本申请实施例提供的一种天线方案的划分示意图；
图10为本申请实施例提供的天线方案的S参数以及电流仿真示意图；
图11为本申请实施例提供的天线方案的S参数以及电流仿真示意图；
图12为本申请实施例提供的天线方案的S参数与现有方案的对比示意图；
图13为本申请实施例提供的天线方案的S参数与现有方案的对比示意图；
图14为本申请实施例提供的一种天线系统的对比示意图；
图15为本申请实施例提供的具有如图14所示组成的两个天线系统的S参数仿真示意图。
具体实施方式
随着无线通信的发展，电子设备中的天线数量也越来越多。示例性的，以电子设备为手机为例，为了支持5G频段的无线通信，手机中就需要在现有天线的基础上，增设5G天线。其中，现有天线可以包括用于进行定位的GPS天线等。
作为一种示例，图1示出了一种GPS天线和用于覆盖5G频段中的N41以及N78的5G天线在手机中的设置示意。其中，N41可以对应到2.5GHz-2.7GHz的工作频段，N78可以对应到3.3GHz-3.8GHz的工作频段。
在如图1的示例中，天线A可以为GPS天线，天线B可以为覆盖N41和N78的5G天线。
天线A可以为左手天线形式。例如，该天线A可以包括一个辐射体，该辐射体的一端可以通过电容C a与馈电点F a连接，辐射体的另一端可以通过G a接地。在一些实现中，辐射体接地的一端可以为靠近手机角落的一端，由此能够更好地激励地板特征模，提升左手模式的辐射效率。其中，左手天线的结构可以参考CN201380008276.8和CN201410109571.9，在此不再赘述。
示例性的，结合图2，为该天线A工作过程中的电流仿真以及对应的S参数仿真示意。可以看到，通过F a的激励，能够在辐射体上形成单向(如向左)的电流。由此 形成左手模式辐射。S参数上可以看到，S11最深点已经超过-20dB，对应的辐射效率和系统效率也高于-5dB。
天线B可以为IFA天线形式。例如，该天线B可以包括一个辐射体，该辐射体的一端可以悬空设置。辐射体上可以设置有馈电点F b。馈电点F b和辐射体之间可以设置有电容C b，用于激励左手模式。在不同于悬空设置的一端的另一端，可以通过G b接地。在一些实现中，辐射体的悬空的一端可以为靠近手机角落的一端，由此使得IFA天线的末端空间更加开放，从而获取较好的辐射性能。
示例性的，结合图3，为该天线B工作过程中的电流仿真以及对应的S参数仿真示意。可以看到，通过F b的激励，能够在馈电点和接地点之间的辐射体上激励左手模式，从而覆盖N41频段，其辐射效率以及系统效率均超过-4dB。此外，通过F b的激励，还能够在辐射体上激励IFA模式(如1/4波长的IFA模式)，该IFA模式可以用于覆盖N78频段，其辐射效率和系统效率均超过-2dB。
结合前述说明，N41的工作频段覆盖200MHz带宽，N78的工作频段覆盖500MHz带宽。结合如图3所示的仿真结果，该天线B工作时产生的两个谐振虽然在最深点性能均比较好，但是，其带宽不足，在用于覆盖N41以及N78的过程中，频带边缘的性能相较于频带中心的性能出现明显的下降。
结合如图1所示的天线设置的示意，可以看到天线B的辐射体的开放端虽然设置在手机的角落，但是由于靠近天线A的接地点。而对于IFA天线而言，其开放的末端为电场大点，在该电场大点附近有接地点的存在会显著影响IFA天线的净空，从而影响IFA天线的辐射性能。因此也就出现上述仿真结果中，天线B带宽不足的问题。
为了进一步说明天线B的性能受天线A的影响的情况，结合图4所示的两个天线系统的工作情况进行对比说明。如图4中的(a)所示的第一天线系统为具有如图1所示组成的天线A和天线B组成的天线系统。如图4中的(b)所示的第二天线系统为去掉天线A之后，仅保留天线B的天线系统。
图5为如图4所示的两个天线系统的S11的仿真示意。可以看到，去掉天线A(即GPS天线)之后的第二天线系统，相较于第一天线系统，其S11在N41以及N78频段均有了显著的改善。比如，在N41频段，S11的带宽增加，最深点变深。可以理解的是，由于N41频段主要通过左手模式覆盖，因此由于整个天线净空的改善，不会使得谐振出现频偏，而会直接提升辐射性能。又如，在N78频段，S11的带宽增加，最深点变深。可以理解的是，由于N78频段主要通过IFA模式覆盖，因此由于整个天线净空的改善，使得谐振出现较大的变化，在改善S11带宽和深度的同时，由于电场大点的末端附近的地板设置的变化，也会出现显著的频偏。因此，天线A对天线B的影响是非常显著的。
由于手机上天线数量较大以及空间有限的原因，使得相邻天线中，天线B的末端靠近天线A的接地点成为较为普遍的结果。这样，就会显著的限制天线B的辐射性能，从而影响N41和N78的通信性能。
应当理解的是，上述示例中，是以天线A为GPS天线，天线B为覆盖N41以及N78的NR天线(即5G天线)为例进行说明的。在两个天线覆盖其他频段的情况下，如果一个天线的末端设置靠近另一个天线的接地点，也会产生类似的问题。
为了解决上述问题，本申请实施例提供一种天线方案，通过共用接地点，同时改进NR天线的结构，通过新的模式覆盖NR天线对应的频段。能够显著降低相邻天线的接地点对NR天线的性能的影响。同时由于NR天线的结构设置，还能够激励新的模式用于覆盖相邻天线的工作频段，从而达到扩展其带宽，提升辐射性能的效果。
以下继续以NR天线覆盖N41以及N78，相邻天线为GPS天线为例，对本申请实施例提供的方案进行说明。
需要说明的是，本申请实施例提供的天线方案，可以应用在用户的电子设备中，用于支持电子设备的无线通信功能。比如，该电子设备可以是手机、平板电脑、个人数字助理(personal digital assistant，PDA)、增强现实(augmented reality，AR)\虚拟现实(virtual reality，VR)设备、媒体播放器等便携式移动设备，该电子设备也可以是智能手表等可穿戴电子设备。本申请实施例对该设备的具体形态不作特殊限制。
以下首先以电子设备为手机为例，对本申请实施例提供的天线方案所设置的环境进行说明。本申请实施例中，天线方案的结构实现可称为天线系统，或者终端天线系统。
示例性的，请参考图6，为本申请实施例提供的一种电子设备600的结构示意图。如图6所示，本申请实施例提供的电子设备600沿z轴由上到下的顺序可以依次设置屏幕及盖板601，金属壳体602，内部结构603，以及后盖604。
其中，屏幕及盖板601可以用于实现电子设备600的显示功能。金属壳体602可以作为电子设备600的主体框架，为电子设备600提供刚性支撑。内部结构603可以包括实现电子设备600各项功能的电子部件以及机械部件的集合。比如，该内部结构603可以包括屏蔽罩，螺钉，加强筋等。后盖604可以为电子设备600背部外观面，该后盖604在不同的实现中可以使用玻璃材料，陶瓷材料，塑料等。
本申请实施例提供的天线方案能够应用在如图6所示的电子设备600中，用于支撑该电子设备600的无线通信功能。在一些实施例中，该天线方案涉及的天线可以设置在电子设备600的金属壳体602上。在另一些实施例中，该天线方案涉及的天线可以设置在电子设备600的后盖604上等。
本申请实施例的不同实现中，天线的具体实现可以是不同的。比如，在一些实施例中，天线的实现可以是结合如图6所示的金属壳体602上的金属边框实现的。在另一些实施例中，该天线方案的实现还可以是采用柔性电路板(Flexible Printed Circuit，FPC)，阳极氧化的压铸成型工艺(Metalframe Diecasting for Anodicoxidation，MDA)等方式实现的。或者，该天线方案还可以是结合上述至少两种实现方式组合获取的。本申请实施例对于磁流环单极子天线的具体实现形式不作限制。
以该天线由FPC实现为例。该FPC可以包括不导电的基材，在该基材上可以设置有导电层。比如，该导电层可以为金属或其他导电材料。在一些实现中，该金属可以为铜或银等。通过对该导电层的结构调整，获取天线系统的辐射体。
作为一种示例，图7示出了一种本申请实施例提供的天线系统700的示意。在不同示例中，该天线系统700可以设置在电子设备(如手机)的角落，比如背视图的左 上角，左下角，右上角，右下角等。
在本示例中，以天线系统700设置在手机的背视图的左上角为例。
如图7所示，该天线系统700的辐射体可以包括第一辐射体和第二辐射体。该第一和第二辐射体可以通过呈分布式电容结构的缝隙耦接。
第一辐射体可以按照所在电子设备的边的不同划分为第一部分和第二部分。比如，第一部分可以为设置在手机的顶边的部分辐射体。第二部分可以为设置在手机的侧边的第一辐射体中的部分辐射体。
在本示例中，第一辐射体上的两个末端中，靠近第二辐射体的末端可以称为第一辐射体的第一端。类似的，第二辐射体上的两个末端中，靠近第一辐射体的末端可以称为第二辐射体的第一端。与之对应的，第一辐射体上的两个末端中，远离第二辐射体的末端可以称为第一辐射体的第二端。类似的，第二辐射体上的两个末端中，远离第一辐射体的末端可以称为第二辐射体的第二端。
在第一辐射体的第一部分上，其右侧末端(如第二端)可以设置馈电点F1。在第一部分上还可以设置有接地点G1(如称为第一接地点)。在一些实现中，该馈电点F2可以通过电容连接到辐射体上，从而激励左手模式覆盖GPS频段。
第二辐射体可以是设置在手机侧边的与第一辐射体不连接的部分辐射体。在第二辐射体上的末端(如第二辐射体的第二端)可以设置有馈电点F2。如图7所示，该第二辐射体和第一辐射体的第一部分之间的缝隙可以呈分布式电容结构。示例性的，该分布式电容结构可以通过S形贯穿缝隙或Z形贯穿缝隙实现。
需要说明的是，如图7所示的天线系统700的结构仅为一种示例，并不构成对天线形状或尺寸的限制。在不同示例中，该天线系统700还可以具有其他变形的形状。
示例性的，结合图8示出的尺寸标识，对本申请实施例提供的天线方案的结构特征进行说明。示例性的，在该天线系统700用于覆盖GPS频段、N41以及N78频段时，该天线系统700的各个结构尺寸可以包括在如下范围内：
在第一辐射体上，X向长度X3可以设置在30mm上下20％的范围内。Y向宽度Y1可以设置在5mm上下20％的范围内。第一辐射体上的第一部分与参考地之间的距离Y2(也可称为第一距离)可以设置在2mm到4mm的范围内。当Y2设置在上述范围内时，能够更好地激励平衡模以便扩展GPS谐振的带宽。第一辐射体的第二部分设置在手机侧边时，该第二部分的长度Y3(也可称为第一长度)可以设置在5mm到15mm的范围内。通过调整Y3的具体尺寸，可以实现对N41的谐振位置的调整。
在第二辐射体上，辐射体的末端到参考地顶边的Y向长度Y4可以设置在14mm上下20％的范围内。辐射体的X向宽度可以设置在5mm上下20％的范围内。
第一辐射体和第二辐射体之间的缝隙宽度X2可以设置在0.2mm到1.2mm的范围内。通过在上述范围内调整X2的具体尺寸，可以实现对N41和N78谐振位置的精细化调整。
该具有如图8所示结构设置的天线系统700，在工作时，可以通过F1馈入GPS信号，通过F2馈入N41以及N78对应信号。使得该天线系统700能够通过覆盖GPS频段、N41以及N78频段的辐射，分别进行对应频段的无线信号的收发。
以下结合具体示例，对本申请实施例提供的天线系统的工作机制以及效果进行说明。
结合前述说明，本申请实施例提供的天线系统中，可以包括两个共体设置的子天线。比如，该天线系统可以包括用于覆盖GPS频段的第一天线，以及用于覆盖N41和N78频段的第二天线。
示例性的，结合图9。该第一天线的辐射体可以包括第一辐射体。该第一天线可以用于进行GPS信号的收发。
第二天线的辐射体可以包括天线系统的第二辐射体，以及第一辐射体上从第一接地点G1到第二辐射体之间的辐射体。也就是说，第二天线的辐射体可以包括第二辐射体，第一辐射体的第二部分，以及第一辐射体的第一部分中上从接地点到靠近第二辐射体的一端的辐射体。该第二天线可以用于进行N41以及N78对应信号的收发。
可以看到，该接地点G1为第一天线以及第二天线所共用。相比于现有的天线方案(如图1所示天线方案)，实现接地点的共用，由此能够节省设置多个接地点设置过程中占用的空间，同时能够节省一个接地点对应的硬件成本开销。
需要说明的是，如图9所示的第一天线和第二天线的划分仅为一种逻辑划分。对于第一天线而言，由于分布式电容结构的存在，在第一天线工作时，通过该分布式电容结构将能量耦合到分布式电容的另一侧上，因此在如图9所示划分的第一天线包括的辐射体之外的天线系统的辐射体上也会存在微弱的电流。也就是说，在另一种划分中，该第一天线的辐射体还可以包括如图9所示的第一天线的辐射体之外的其他部分。由于在其他部分上的GPS信号的电流较弱，对GPS信号的收发的贡献也就相对较弱。类似的，该第二天线的辐射体还可以包括如图9所示的第二天线的辐射体之外的其他部分。由于在其他部分上的信号的电流较弱，对N41以及N78对应信号的收发的贡献也就相对较弱。
具有如图7-图9中任一种所示的组成的天线系统，能够在相同的天线面积下，提供更好的辐射性能。比如，对于GPS、N41以及N78提供更好的带宽覆盖，以及更好的辐射效率和系统效率。
示例性的，以下结合S参数和效率的仿真情况，以及对现有天线的对比，对本申请实施例提供的天线方案能够达到的效果进行说明。
请参考图10，为第一天线(即GPS天线)工作时的电流仿真以及对应的S参数仿真情况。如图10所示，在该第一天线工作时，能够在馈电点和接地点之间的辐射体上激励同向电流，即激励获取左手模式。对应到S11上，该左手模式的谐振最深点接近-20dB，-6dB带宽超过300MHz。此外，该第一天线还可以激励平衡模，该平衡模对应的谐振可以位于如图10中的S参数仿真所示的2GHz附近。该平衡模的S11虽然不是非常显著，但是能够起到拓宽左手模式谐振效率带宽的作用。比如，如图10所示的效率仿真曲线，2GHz附近的系统效率已经接近-4dB。虽然GPS天线一般要求的带宽较窄，但是通过拓宽效率带宽能够有效地避免由于细微的量产不一致导致的性能剧烈波动的情况。
图11为第二天线(即NR天线)工作时的电流仿真以及对应的S参数仿真情况。如图11所示，该第二天线工作时，能够分别激励共模(CM)模式以及差模(DM)模式。其中，在第二天线辐射体上分布有同向电流时，可以对应到CM模式。在第二天线辐射体上以分布式电容结构为边界分布有反向电流时，可以对应到DM模式。由此通过CM 模式的谐振覆盖N41频段，通过DM模式的谐振覆盖N78频段。从效率仿真曲线上看，可以看到辐射效率和系统效率均达到-2dB以上。
上述如图10和图11分别对本申请实施例提供的天线方案的电流分布以及辐射情况进行了说明，以下结合如图1所示的现有天线，对本申请实施例提供的方案所能达到的效果进行对比性说明。
示例性的，结合图12，为本申请实施例提供的天线方案在GPS频段与现有天线方案的性能对比。如图12中的(a)所示，为S11的对比示意。可以看到，由于平衡模的加入，使得本申请方案的谐振S11带宽显著优于现有方案。参考图12中的(b)示出的辐射效率对比示意以及图12中的(c)示出的系统效率对比示意。可以看到，与S11对应的，在本申请实施例提供的方案中，在平衡模对应的频段(如2GHz附近)，辐射效率有所提升，而该提升在系统效率方面表现更为明显。比如，在2GHz附近提升超过2dB。
结合图13，为本申请实施例提供的天线方案在NR频段(如N41和N78)与现有天线方案的性能对比。如图13中的(a)所示，为S11的对比示意。可以看到，本申请方案的谐振S11带宽显著优于现有方案。参考图13中的(b)示出的辐射效率对比示意以及图13中的(c)示出的系统效率对比示意。可以看到，与S11对应的，在本申请实施例提供的方案中，通过CM模式和DM模式对N41和N78进行覆盖，辐射效率有所提升，而该提升在系统效率方面表现更为明显。比如，在4GHz附近提升超过2dB。
通过如图12以及图13的对比，可以看到本申请实施例提供的天线系统的性能显著优于现有方案(如图1所示的方案)的性能。
结合前述说明，现有方案中，NR天线由于GPS天线接地点的影响，导致性能下降。对应的，本申请实施例提供的天线方案中，由于采用了共接地点的共体方案，使得在辐射体面积增加的同时，能够避免相邻天线(如GPS天线)的接地点靠近NR天线末端导致的性能下降的问题。
示例性的，结合图14，对本申请实施例提供的天线系统(即如图14中的(a)所示的第三天线系统)，以及去掉GPS天线的NR天线(如IFA天线形式)构成的天线系统(即如图14中的(b)所示的第二天线系统)的性能进行对比，以对上述效果进行佐证。
如图15所示，为如图14所示的两个天线系统在N41和N78频段的效率仿真对比示意。可以看到，无论是辐射效率或是系统效率，本申请实施例提供的天线方案与去掉GPS影响的单独IFA构成的NR天线的性能基本相当。因此，本申请实施例提供的天线方案能够有效地避免GPS天线对NR天线的性能的影响。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包括这些改动和变型在内。

Claims (20)

  1. 一种终端天线系统，其特征在于，所述终端天线系统设置在电子设备中，所述终端天线系统包括：
    第一辐射体和第二辐射体，所述第一辐射体的第一端和所述第二辐射体的第一端通过缝隙耦接；
    所述第一辐射体上远离所述第二辐射体的第二端设置有第一馈电点，所述第一辐射体上还设置有第一接地点；
    所述第二辐射体的第二端设置有第二馈电点，所述第二辐射体的第二端为远离所述第一辐射体的端点。
  2. 根据权利要求1所述的终端天线系统，其特征在于，所述第一辐射体包括第一部分和第二部分，所述第一部分和所述第二部分呈L形连接，所述缝隙设置在所述第二部分与所述第二辐射体之间，所述第一接地点设置在所述第一部分上。
  3. 根据权利要求2所述的终端天线系统，其特征在于，
    第一距离(Y2)设置在2mm到4mm的范围内，所述第一距离(Y2)是所述第一辐射体的第一部分到参考地之间的距离；
    第一长度(Y3)设置在5mm到15mm的范围内，所述第一长度(Y3)是所述第一辐射体的第二部分的长度；
    所述缝隙宽度(X2)设置在0.2mm到1.2mm的范围内。
  4. 根据权利要求2或3所述的终端天线系统，其特征在于，
    所述终端天线系统包括第一天线和第二天线，所述第一天线的辐射体为所述第一辐射体；
    所述第二天线的辐射体包括：
    所述第二辐射体，所述第一辐射体的第二部分，以及所述第一辐射体上第二部分到所述第一接地点之间的辐射体。
  5. 根据权利要求4所述的终端天线系统，其特征在于，
    所述第一馈电点和所述第一辐射体之间还设置有电容，所述电容用于激励所述第一天线的左手模式。
  6. 根据权利要求1-5中任一项所述的终端天线系统，其特征在于，
    所述终端天线系统工作时，所述第一天线覆盖第一频段，所述第二天线覆盖第二频段和第三频段，所述第二频段的谐振位置低于所述第一频段。
  7. 根据权利要求6所述的终端天线系统，其特征在于，
    缝隙宽度(X2)用于调节所述第二频段和所述第三频段的谐振位置；
    第一长度(Y3)用于调节所述第二频段的谐振位置。
  8. 根据权利要求6或7所述的终端天线系统，其特征在于，
    所述第一天线覆盖所述第一频段的模式包括左手模式和平衡模，
    第一距离(Y2)用于调节所述平衡模的谐振位置。
  9. 根据权利要求6-8中任一项所述的终端天线系统，其特征在于，所述第一频段包括GPS频段，所述第二频段包括2.5GHz到2.7GHz，所述第三频段包括3.3GHz到3.8GHz。
  10. 根据权利要求1-9中任一项所述的终端天线系统，其特征在于，所述终端天线系统设置在所述电子设备的角落，其中，
    所述第一辐射体的第一部分设置在所述电子设备的顶部或底部，所述第一辐射体的第二部分和所述第二辐射体设置在所述电子设备的侧部；或者，
    所述第一辐射体的第一部分设置在所述电子设备的侧部，所述第一辐射体的第二部分和所述第二辐射体设置在所述电子设备的顶部或底部。
  11. 一种电子设备，其特征在于，所述电子设备设置有如权利要求1-10中任一项所述的终端天线系统；所述电子设备在进行信号发射或接收时，通过所述终端天线系统进行信号的发射或接收。
  12. 一种终端天线系统，其特征在于，所述终端天线系统设置在电子设备中，所述终端天线系统包括：
    第一辐射体和第二辐射体，所述第一辐射体的第一端和所述第二辐射体的第一端通过缝隙耦接；
    所述第一辐射体上远离所述第二辐射体的第二端设置有第一馈电点，所述第一辐射体上还设置有第一接地点；
    所述第二辐射体的第二端设置有第二馈电点，所述第二辐射体的第二端为远离所述第一辐射体的端点；
    所述终端天线系统包括第一天线和第二天线，所述第一天线的辐射体为所述第一辐射体；
    所述第二天线的辐射体包括：所述第二辐射体，所述第一辐射体的第二部分，以及所述第一辐射体上第二部分到所述第一接地点之间的辐射体；
    所述终端天线系统工作时，所述第一天线覆盖第一频段，所述第二天线覆盖第二频段和第三频段，所述第二频段的谐振位置高于所述第一频段；缝隙宽度(X2)用于调节所述第二频段和所述第三频段的谐振位置。
  13. 根据权利要求12所述的终端天线系统，其特征在于，所述第一辐射体包括第一部分和第二部分，所述第一部分和所述第二部分呈L形连接，所述缝隙设置在所述第二部分与所述第二辐射体之间，所述第一接地点设置在所述第一部分上。
  14. 根据权利要求13所述的终端天线系统，其特征在于，
    第一距离(Y2)设置在2mm到4mm的范围内，所述第一距离(Y2)是所述第一辐射体的第一部分到参考地之间的距离；
    第一长度(Y3)设置在5mm到15mm的范围内，所述第一长度(Y3)是所述第一辐射体的第二部分的长度；
    所述缝隙宽度(X2)设置在0.2mm到1.2mm的范围内。
  15. 根据权利要求12-14中任一项所述的终端天线系统，其特征在于，
    所述第一馈电点和所述第一辐射体之间还设置有电容，所述电容用于激励所述第一天线的左手模式。
  16. 根据权利要求12-14中任一项所述的终端天线系统，其特征在于，
    第一长度(Y3)用于调节所述第二频段的谐振位置。
  17. 根据权利要求12-14中任一项所述的终端天线系统，其特征在于，
    所述第一天线覆盖所述第一频段的模式包括左手模式和平衡模，
    第一距离(Y2)用于调节所述平衡模的谐振位置。
  18. 根据权利要求12-14中任一项所述的终端天线系统，其特征在于，所述第一频段包括GPS频段，所述第二频段包括2.5GHz到2.7GHz，所述第三频段包括3.3GHz到3.8GHz。
  19. 根据权利要求12-14中任一项所述的终端天线系统，其特征在于，所述终端天线系统设置在所述电子设备的角落，其中，
    所述第一辐射体的第一部分设置在所述电子设备的顶部或底部，所述第一辐射体的第二部分和所述第二辐射体设置在所述电子设备的侧部；或者，
    所述第一辐射体的第一部分设置在所述电子设备的侧部，所述第一辐射体的第二部分和所述第二辐射体设置在所述电子设备的顶部或底部。
  20. 一种电子设备，其特征在于，所述电子设备设置有如权利要求12-19中任一项所述的终端天线系统；所述电子设备在进行信号发射或接收时，通过所述终端天线系统进行信号的发射或接收。
PCT/CN2022/117659 2021-11-12 2022-09-07 一种终端天线系统及电子设备 Ceased WO2023082812A1 (zh)

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