WO2013180479A1 - 안테나 및 이를 포함하는 통신 장치 - Google Patents
안테나 및 이를 포함하는 통신 장치 Download PDFInfo
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- WO2013180479A1 WO2013180479A1 PCT/KR2013/004743 KR2013004743W WO2013180479A1 WO 2013180479 A1 WO2013180479 A1 WO 2013180479A1 KR 2013004743 W KR2013004743 W KR 2013004743W WO 2013180479 A1 WO2013180479 A1 WO 2013180479A1
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- Prior art keywords
- loop antenna
- antenna
- impedance matching
- loop
- ground
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
-
- 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
-
- 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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
-
- 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
- H01Q5/328—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 between a radiating element and ground
-
- 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
- H01Q5/335—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 at the feed, e.g. for impedance matching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/005—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with variable reactance for tuning the antenna
-
- 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
Definitions
- the present invention relates to an antenna and a communication device including the same.
- one communication device is designed to extend the bandwidth of an antenna or operate in multiple bands.
- inverted F type antennas are frequently used in small devices such as mobile communication terminals and smart phones.
- the inverted F type antenna was used, it was able to cover the service band previously required, and it was able to perform moderately excellent performance.
- the pattern shape is changed. Since the design of the inverted F type antenna is different for each antenna designer, the pattern shape of the completed antenna is also varied. In other words, there was no established single design approach.
- One object of the present invention is to provide an antenna capable of a simple and clear design.
- a power supply A first loop antenna having one end connected to the feed and the other end connected to ground; And a second loop antenna having one end connected to the feed and the other end connected to the ground and having a different electrical length from the first loop antenna, wherein the line width is discontinuously different in a partial region of the first loop antenna.
- An antenna is provided in which a matching line is formed.
- the ground may be in the form of a full ground overlapping the first and second loop antennas.
- At least one of the first and second loop antennas may be formed on a rear cover of the communication device.
- At least one of the first and second loop antennas may be formed on an inner surface of the battery cover.
- the impedance matching line may be formed in an area that does not overlap with the release component.
- the impedance matching line may be formed at the point where the electric field or the magnetic field distribution is maximum in the first and second loop antennas.
- first inductor interposed between one end of the first loop antenna and the power supply; And a second inductor interposed between the other end of the first loop antenna and the ground, the second inductor having an inductance value different from that of the first inductor, wherein the impedance matching line is arranged within the first loop antenna.
- the inductance value of the two inductors can be formed closer to the larger.
- a first inductor interposed between one end of the first loop antenna and the power supply; And a second inductor interposed between the other end of the first loop antenna and the ground and having the same inductance value as the first inductor, wherein the impedance matching line includes an intermediate point of the first loop antenna. Can be formed on.
- the apparatus may further include a first inductor interposed between one end of the first loop antenna and the power supply, and the impedance matching line may be formed closer to the one end of the first loop antenna and the other end of the first loop antenna.
- the display device may further include a second inductor interposed between the other end of the first loop antenna and the ground, and the impedance matching line may be formed closer to the other end of one end and the other end of the first loop antenna.
- the impedance matching line may include a gap coupling structure.
- the impedance matching line may include a slot.
- a branch line for branching the first loop antenna and the second loop antenna A first feed line of a loop structure having one end connected to the branch line and the other end connected to the ground; And a second feed line having a loop structure, one end of which is connected to the main circuit unit, the other end of which is connected to the ground, and which is inductively coupled to the first feed line.
- a communication device including the antenna is provided.
- the antenna can be easily designed by simply adjusting the inductance component or the impedance matching line.
- an antenna that exhibits excellent performance without removing the ground plane of the main circuit included in the communication device. Therefore, when such an antenna is included, the main circuit included in the communication device has an advantage that it can be utilized in a full ground state. In this case, the display area of the communication device can be extended to the entire area of one surface of the communication device.
- the ZOR (Zeroth Order Resonance) characteristic that is, the zero-order resonance characteristic, is less affected by the hand (hand) than the conventional inverted F type or inverted L type antenna, and interferes with the deformed component.
- the ZOR (Zeroth Order Resonance) characteristic that is, the zero-order resonance characteristic, is less affected by the hand (hand) than the conventional inverted F type or inverted L type antenna, and interferes with the deformed component.
- FIG. 1 is a view illustrating a display area and an antenna area of a communication device according to the related art.
- FIG. 2 is a diagram illustrating an antenna according to an embodiment of the present invention.
- FIG 3 is a diagram illustrating only the first loop antenna separated from the antenna according to an embodiment of the present invention.
- FIG. 4 is a graph illustrating VSWR of only the first loop antenna in the antenna according to the embodiment of the present invention.
- FIG 5 is a diagram illustrating only the first loop antenna separated from the antenna according to an embodiment of the present invention.
- FIG. 6 is a graph illustrating VSWR of only the first loop antenna in the antenna according to the embodiment of the present invention.
- FIG. 7 is a diagram illustrating a state in which an antenna is applied to a communication device according to an embodiment of the present invention.
- FIG. 8 is a graph comparing VSWR when the antenna is operated in the full ground state and when the antenna is operated with the lower ground removed 2mm according to an embodiment of the present invention.
- FIG. 9 is a view for explaining the position of forming the impedance matching line in the antenna according to an embodiment of the present invention.
- FIG. 10 is a diagram showing an electric field distribution at 1.09 GHz and a magnetic field distribution at 1.95 GHz with respect to the structure of FIG.
- FIG. 11 is a view illustrating an impedance matching line formed in the region identified in FIG. 10.
- FIG. 12 is a graph of VSWR that changes as the values of the design parameters of the impedance matching line of FIG. 11 are adjusted.
- FIG. 13 is a diagram showing an electric field distribution at 1.85 GHz with respect to the structure of FIG.
- FIG. 14 is a diagram illustrating a state in which impedance matching lines are formed in the region identified in FIG. 13.
- 15 is a graph of VSWR that changes as the values of the design parameters of the impedance matching line of FIG. 14 are adjusted.
- FIG. 16 is a diagram showing an electric field distribution at 1.95 GHz with respect to the structure of FIG.
- FIG. 17 is a view illustrating an impedance matching line formed in the region identified in FIG. 16.
- FIG. 18 shows a graph of VSWR that changes as the values of the design parameters of the impedance matching line of FIG. 17 are adjusted.
- FIG. 19 is a diagram showing a magnetic field distribution at 1.85 GHz with respect to the structure of FIG.
- FIG. 20 is a diagram illustrating a state in which impedance matching lines are formed in the region identified in FIG. 19.
- 21 is a graph of VSWR that changes as the values of the design parameters of the impedance matching line of FIG. 20 are adjusted.
- 22 is a diagram illustrating only the first loop antenna separated from the antenna according to an embodiment of the present invention.
- FIG. 23 is a diagram illustrating various shapes of an impedance matching line.
- 24 and 25 illustrate a state in which an antenna is combined with a wideband feed structure and applied according to an embodiment of the present invention.
- FIG. 26 is a graph illustrating VSWR measured in a state in which an antenna is combined with a broadband power supply structure according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating an antenna according to an embodiment of the present invention.
- an antenna according to an embodiment of the present invention includes a power supply 10, a first loop antenna 11, and a second loop antenna 12.
- One end of the first loop antenna 11 is connected to the power supply 10 and the other end is connected to the ground.
- One end of the second loop antenna 12 is also connected to the feed and the other end is connected to ground.
- the second loop antenna 12 has a different electrical length than the first loop antenna 11. That is, the electrical length considering the physical length d1 of the first loop antenna 11 and the inductance components L1 and L2 at both ends is equal to the physical length d2 of the second loop antenna 12 and the inductance component at both ends ( It is different from the electrical length considering L3 and L4).
- inductance components may refer to a structure in which the inductor is directly connected, but is not limited thereto, and may be an inductance component generated by the length component of the lead end.
- FIG 3 is a diagram illustrating only the first loop antenna 11 separated from the antenna according to the embodiment of the present invention.
- the operation principle of the first loop antenna 11 is described.
- the electrical length considering the physical length (d) of the first loop antenna and the inductance components (L1, L2) of both ends is close to ⁇ / 2
- the current intensity is distributed maximum at both ends of the loop, and the minimum current strength at the loop center is The zero-order resonance characteristic is shown.
- the electrical length is close to 3 ⁇ / 2
- the maximum point of the current appears at both ends and the center of the loop and shows the first resonance characteristic.
- This resonance characteristic may be adjusted by forming an impedance matching line 13 in which line widths are discontinuously different in some regions of the first loop antenna 11.
- the impedance matching line 13 having the line width discontinuously extended as shown in FIG. 3 is formed, the matching characteristic is changed by the inductance value Lw1 and the capacitance value Cw1 in the impedance matching line 13. .
- FIG. 4 is a graph illustrating VSWR of only the first loop antenna 11 in the antenna according to the embodiment of the present invention, which is different from the case where the impedance matching line 13 is included in the center of the first loop antenna 11. Are graphs respectively.
- the physical length d and the inductance components L1 and L2 of the first loop antenna 11 are adjusted appropriately so that the 0th-order resonance characteristic appears at around 1.09 GHz, and around 1.95 GHz. It can be designed to show the first resonance characteristic at. In the case of simply designing this structure without the impedance matching line 13, it has a resonance characteristic indicated as "before application" in FIG.
- the impedance matching line 13 in which the line width is discontinuously extended is formed at the center of the first loop antenna 11, the impedance matching of the antenna is changed, and as a result, the resonance characteristic is also changed.
- the graph labeled “after application” in FIG. 4 shows this.
- the impedance matching line 13 when the impedance matching line 13 is applied, the zero-order resonance has a lower frequency, and the first-order resonance has a higher frequency.
- the zero-order resonance can be analyzed as the frequency shifts downward as the parallel capacitance increases, and the first-order resonance can be analyzed as the frequency moves upward as the series inductance decreases.
- the impedance matching characteristic is improved by decreasing the overall VSWR value. Since the impedance matching line 13 is formed in this way, the resonance frequency can be intentionally adjusted, and thus the resonance characteristic can be designed to appear in a desired service band. In addition, there is an advantage that can reduce the VSWR value by improving the matching characteristics.
- the above-described improvement in the resonance frequency shift and matching characteristics may vary depending on the formation region of the impedance matching line 13. This will be described with reference to FIGS. 5 and 6 as follows.
- FIG. 5 is a diagram illustrating only the first loop antenna 11 separated from the antenna according to an embodiment of the present invention
- FIG. 6 is a VSWR of only the first loop antenna 11 in the antenna according to an embodiment of the present invention.
- the graph shows the case where the impedance matching line 13 is included at the other end of the first loop antenna 11 and the case where it is not.
- the physical length d and the inductance components L1 and L2 of the first loop antenna 11 are appropriately adjusted to 0 at about 1.09 GHz. It can be designed such that the difference resonance characteristics are shown and the primary resonance characteristics appear in the vicinity of 1.95 GHz. In the case of simply designing this structure without the impedance matching line 13, it has a resonance characteristic indicated as "before application" in FIG.
- the impedance matching line 13 having the line width discontinuously extended is formed at the other end of the first loop antenna 11, the impedance matching of the antenna is changed, and as a result, the resonance characteristic is also changed.
- the graph labeled “after application” in FIG. 6 indicates this.
- the graph shown in FIG. 6 has different characteristics from that of FIG. 4.
- the impedance matching line 13 when the impedance matching line 13 is applied, the zero-order resonance increases in frequency, and the first-order resonance decreases in frequency.
- Zero-order resonance can be analyzed as the frequency moves upward as the series inductance decreases, and the first-order resonance moves as the frequency moves downward as the parallel capacitance increases.
- the impedance matching characteristic is improved by decreasing the overall VSWR value.
- FIG. 7 is a diagram illustrating a state in which an antenna is applied to a communication device according to an embodiment of the present invention.
- FIG. 7A illustrates a state before applying the impedance matching line 13
- FIG. 7B illustrates a state after applying the impedance matching line 13.
- the antenna according to an embodiment of the present invention is a structure included in the communication device 100.
- the specific shape of the main circuit is not shown in the figure and only the ground 20 is shown, it will be obvious that the structure of the main circuit may be further added.
- One end 11a of the first loop antenna 11 is connected to the power supply 10 and the other end 11b is connected to the ground 20.
- the second loop antenna 12 has one end 12a connected to the power supply 10 and the other end 12b connected to the ground 20. Since the electrical lengths of the first loop antenna 11 and the second loop antenna 12 are different from each other, the currents do not cancel each other and can operate as loop antennas.
- the first loop antenna 11 Before applying the impedance matching line 13, that is, the structure according to FIG. 7A, the first loop antenna 11 has a zero-order resonance characteristic at 1.09 GHz and 1 at 1.95 GHz. Has a differential resonance characteristic.
- the second loop antenna 12 has a zero order resonance characteristic in the vicinity of 1.85 GHz.
- the antenna according to an embodiment of the present invention operates as a whole by combining such resonance characteristics of the first loop antenna 11 and the second loop antenna 12.
- At least one impedance matching line 13 may be formed in a partial region of the first loop antenna 11 or a partial region of the second loop antenna 12.
- two impedance matching lines 13a and 13c formed in the first loop antenna 11 and two impedance matching lines 13b formed in the second loop antenna 12 are provided. , 13d).
- the impedance matching line 13 is included, the resonant frequency of the antenna may be adjusted according to a desired service band.
- the impedance matching line 13 is formed to operate in the LTE (Long Term Evolution) band together with the penta band including the GSM quad band and the W2100 band.
- LTE Long Term Evolution
- the number or position shape of the impedance matching line 13 is a parameter that can be modified according to the designer's intention, and will not be fixed as described above.
- FIG. 8 is a graph comparing VSWR when the antenna is operated in the full ground state and when the antenna is operated with the lower ground removed 2mm according to an embodiment of the present invention.
- the antenna according to an embodiment of the present invention also exhibits better characteristics when operating in a state in which the lower ground is partially removed, but it can be confirmed that performance degradation is minimized even when operating in a full ground state. have.
- a typical inverted F-type antenna is difficult to show such excellent characteristics when the ground area under the antenna is in full ground.
- it can be seen that excellent performance is expressed even when the ground is kept under the antenna.
- the ground 20 may be in the form of a full ground so as to overlap the first and second loop antennas 11 and 12.
- the display area can be extended to the front side, there is an advantage of minimizing the limitation of the communication device design due to the antenna.
- At least one of the first and second loop antennas 11 and 12 may be disposed on a rear cover of the communication device. Can be formed. Or it may be formed on the inner side of the battery cover (battery cover).
- various methods including laser direct structuring (LDS) can be used as the method of manufacturing the antenna.
- the antenna has better performance due to an air gap formed between the rear cover and the battery cover to form at least one of the first and second loop antennas 11 and 12 on the inner side of the rear cover or the battery cover. There is an advantage to being terminated. This feature is different from the conventional inverted F type antenna, and may be referred to as an effect exhibited by the structure according to the embodiment of the present invention.
- FIG. 9 is a view for explaining the position of the impedance matching line in the antenna according to an embodiment of the present invention.
- the position of the release component 30 such as a speaker is often determined in advance according to the plan of the communication device designer.
- the antenna designer has no choice but to design the antenna depending on the overall structure of the communication device design.
- the position of the deformable component 30 is also one of the considerations in the antenna design.
- the region where the impedance matching line 13 is formed is preferably disposed so as not to overlap each other in order to prevent deterioration of performance due to the release component 30. Referring to FIG. 9, the impedance matching line 13 may be formed in the region 14 that does not overlap with the release component 30.
- the relationship between the position of the impedance matching line 13 and the electric field (E-field) or magnetic field (H-field) distribution will be described in detail with reference to FIGS. 10 to 21.
- An embodiment of the present invention with reference to FIGS. 10 to 21 is described as a basic structure with the structure shown in FIG.
- the first loop antenna 11 has a zero-order resonance characteristic near 1.09 GHz and a first-order resonance characteristic near 1.95 GHz.
- the second loop antenna 12 has a zero order resonance characteristic in the vicinity of 1.85 GHz.
- the resonance characteristics of the first loop antenna 11 and the second loop antenna 12 are combined to operate. Therefore, in the following description, an embodiment of the present invention will be described based on 1.09 GHz, 1.85 GHz, and 1.95 GHz.
- the resonance frequency is not limited thereto and may be changed according to a designer's intention.
- FIG. 10 is a diagram showing an electric field distribution at 1.09 GHz and a magnetic field distribution at 1.95 GHz with respect to the structure of FIG. 10, it can be seen that the region where the electric field distribution is maximum at 1.09 GHz and the region where the magnetic field distribution is maximum at 1.95 GHz overlap each other.
- FIG. 11 shows the impedance matching line 13a formed in the region identified in FIG. 10.
- 12 shows a graph of VSWR that changes as the values of the design parameters SE1_W1, SE1_W2, SE1_W3 of the impedance matching line 13a are adjusted. Referring to FIG. 12, it can be seen that the resonance characteristic formed at 1.09 GHz is shifted downward, and the resonance characteristic formed at 1.95 GHz is shifted upward. The reason why the frequency of the resonance formed at 1.09 GHz is shifted downward is because the impedance matching line 13a having an extended line width is formed in a region where the electric field distribution at 1.09 GHz is maximum.
- the frequency of the resonance formed at 1.95 GHz is shifted upward is because the impedance matching line 13a with the line width is expanded in the region where the magnetic field distribution at 1.95 GHz is maximum.
- the frequency may be moved downward, and in the region where the H-feild distribution is the maximum.
- an upward movement of the frequency may be intended. Since the distribution of the electric field and the magnetic field is different for each frequency, if the impedance matching line is formed in consideration of the electric field and the magnetic field distribution according to the frequency band to be adjusted, the frequency can be adjusted independently. This property applies equally to the following description.
- FIG. 13 is a diagram showing an electric field distribution at 1.85 GHz with respect to the structure of FIG.
- FIG. 14 is a view showing an impedance matching line 13b formed in the region identified in FIG. 13.
- FIG. 15 there is shown a graph of VSWR that changes as the values of the design parameters SE2_W1 and SE2_W2 of the impedance matching line 13b are adjusted.
- the resonance characteristic formed at 1.85 GHz has moved downward in frequency.
- the reason why the frequency of the resonance formed at 1.85 GHz is shifted downward is because the impedance matching line 13b having an extended line width is formed in the region where the electric field distribution at 1.85 GHz is maximum.
- FIG. 16 is a diagram showing an electric field distribution at 1.95 GHz with respect to the structure of FIG.
- FIG. 17 illustrates the formation of the impedance matching line 13c in the region identified in FIG. 16.
- the resonance characteristic formed at 1.95 GHz is moved downward.
- the reason why the frequency of the resonance formed at 1.95 GHz is shifted downward is because the impedance matching line 13c having the line width is expanded in the region where the electric field distribution at 1.95 GHz is maximum.
- FIG. 19 is a diagram showing a magnetic field distribution at 1.85 GHz with respect to the structure of FIG. FIG. 20 illustrates the formation of the impedance matching line 13d in the region identified in FIG. 19.
- FIG. 21 there is shown a graph of VSWR that changes as the values of the design parameters SE4_W1 and SE4_W2 of the impedance matching line 13d are adjusted.
- the frequency of the resonance characteristic formed at 1.85 GHz is shifted downward.
- the impedance matching line having the extended line width is formed in the region where the magnetic field distribution is maximum.
- the resonance frequency is moved upward.
- the frequency is moved downward.
- the electric field distribution at 1.85 GHz is maximum. This is because the regions to be adjacent are adjacent. That is, the frequency is moved downward because it is more affected by the region described with reference to FIGS. 13 to 15.
- the antenna according to an embodiment of the present invention has a characteristic of shifting a resonance frequency band or increasing a Q value. Therefore, according to the exemplary embodiment of the present invention, the impedance matching line 13 may be formed at the point where the electric field or the magnetic field distribution is maximum in the first and second loop antennas 11 and 12.
- FIG. 22 is a diagram illustrating only the first loop antenna 11 separated from the antenna according to an embodiment of the present invention, and illustrates a change in electric field distribution according to inductance components L1 and L2 at both ends.
- inductance components L1 and L2 are included at both ends of the first loop antenna 11.
- a first inductance component L1 is interposed between one end of the first loop antenna 11 and the power supply 10, and a second inductance component L2 between the other end of the first loop antenna 11 and ground. This intervenes.
- FIG. 22A illustrates a case where the values of the first inductance component L1 and the second inductance component L2 are the same.
- the region having the largest electric field distribution is the center of the first loop antenna 11. Is formed.
- FIG. 22 illustrates a case where the value of the second inductance component L2 is larger than the first inductance component L1. In this case, the region having the largest electric field distribution is closer to the second inductance component L2. Formed closely.
- the region having the largest electric field distribution can be predicted in advance. Since the impedance matching line 13 is formed in the region where the electric field distribution is maximum, the tuning is more influenced. Therefore, according to the exemplary embodiment of the present invention, the impedance matching line 13 is formed closer to the larger inductance value. . In this case, there is an advantage that the position of the impedance matching line 13 can be efficiently determined even without checking the electric field distribution separately.
- a first inductor is interposed between one end of the first loop antenna 11 and the power supply 10, and a second inductor is interposed between the other end of the first loop antenna 11 and ground 20.
- the impedance matching line 13 is formed closer to the side where the inductance value is larger.
- a first inductor is interposed between one end of the first loop antenna 11 and the power supply 10, and a second inductor is interposed between the other end of the first loop antenna 11 and the ground 20.
- the impedance matching line 13 is formed in a region including an intermediate point of the first loop antenna 11.
- a first inductor is interposed between one end of the first loop antenna 11 and the power supply 10.
- the other end of the first loop antenna 11 is directly connected to the ground 20.
- the impedance matching line 13 is formed near one end of the first loop antenna 11 and the other end.
- a second inductor is interposed between the other end of the first loop antenna 11 and the ground 20.
- One end of the first loop antenna 11 is directly connected to the power supply 10.
- the impedance matching line 13 is formed near one end of the first loop antenna 11 and the other end.
- the impedance matching line 13 may have a shape in which the line width is discontinuously expanded. As shown in FIG. 23B, the impedance matching line 13 may have a shape in which the line width is discontinuously reduced. (A) and (b) of FIG. 23 have opposite characteristics. If the impedance matching line 13 having a shape in which the line width is reduced as shown in (b) is used, the direction of the frequency shift described with reference to FIGS. 3 to 21 will be reversed.
- the impedance matching line 13 may include a gap coupling structure.
- a slot may be included in the impedance matching line 13. As such, including a gap coupling structure or a slot may change the inductance and capacitance components of the impedance matching line 13.
- 24 and 25 illustrate a state in which an antenna is combined with a wideband feed structure and applied according to an embodiment of the present invention.
- the power supply 10 includes a branch line 43 for branching the first loop antenna 11 and the second loop antenna 12.
- the structure of the branch line 43 is formed in a 'T' shape, but the shape is not limited thereto and may be variously modified.
- the power supply 10 also includes a first feed line 41 having a loop structure as a whole.
- the first feed line 41 is connected to the branch line 43, one end 41a of the first feed line is connected to the branch line 43, and the other end 41b of the first feed line is connected to the ground 20. Connected.
- the other end 41b of the first feed line and the ground 20 may be connected through a via hole or may be connected through a connection terminal.
- the power supply 10 also includes a second feed line 42 that is in a loop structure as a whole and is inductively coupled to the first feed line 41.
- One end 42a of the second feed line is connected to the main circuit unit (not shown), and the other end 42b is connected to the ground 20.
- the first feed line 41 and the second feed line 42 may be formed on different substrates, and may be used in a structure in which these substrates are stacked on each other.
- broadband matching of the antenna can be realized through inductive coupling between the first feed line 41 and the second feed line 42, and as a result, bandwidth can be extended. Such effects will be described with reference to FIG. 26.
- FIG. 26 is a graph illustrating VSWR measured in a state in which an antenna is combined with a broadband power supply structure according to an embodiment of the present invention.
- the combined application of the double loop antenna and the broadband feeding structure together operates in a wide band as compared with the case where only the double loop antenna is applied. Therefore, there is an advantage that can cover more service bands.
- the antenna according to various embodiments of the present invention described above may be applied to a communication device.
- the communication device should be understood as a generic term for various electronic devices such as laptop computers and tablet computers, as well as various handheld devices such as mobile communication terminals and smart phones.
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- Variable-Direction Aerials And Aerial Arrays (AREA)
- Support Of Aerials (AREA)
Description
Claims (14)
- 급전;일단이 상기 급전에 연결되고 타단이 접지에 연결되는 제1 루프 안테나; 및일단이 상기 급전에 연결되고 타단이 상기 접지에 연결되며 상기 제1 루프 안테나와 상이한 전기적 길이를 갖는 제2 루프 안테나를 포함하고,상기 제1 루프 안테나의 일부 영역에 선폭이 불연속적으로 상이한 임피던스 매칭 라인이 형성되는 안테나.
- 제1항에 있어서,상기 접지는 상기 제1, 제2 루프 안테나와 오버랩되는 풀 그라운드(full ground) 형태인 안테나.
- 제1항에 있어서,상기 제1, 제2 루프 안테나 중 적어도 어느 하나는 통신 장치의 리어 커버에 형성되는 안테나.
- 제1항에 있어서,상기 제1, 제2 루프 안테나 중 적어도 어느 하나는 배터리 커버 내측면에 형성되는 안테나.
- 제1항에 있어서,상기 임피던스 매칭 라인은 이형 부품과 오버랩되지 않는 영역에 형성되는 안테나.
- 제1항에 있어서,상기 임피던스 매칭 라인은 상기 제1, 제2 루프 안테나 내에서 전계 또는 자계 분포가 최대인 지점에 형성되는 안테나.
- 제1항에 있어서,상기 제1 루프 안테나의 일단과 상기 급전 사이에 개재되는 제1 인덕터; 및상기 제1 루프 안테나의 타단과 상기 접지 사이에 개재되며 상기 제1 인덕터와 상이한 인덕턴스 값을 갖는 제2 인덕터를 더 포함하고,상기 임피던스 매칭 라인은 상기 제1 루프 안테나 내에서 상기 제1, 제2 인덕터 중 인덕턴스 값이 더 큰 쪽에 가깝게 형성되는 안테나.
- 제1항에 있어서,상기 제1 루프 안테나의 일단과 상기 급전 사이에 개재되는 제1 인덕터; 및상기 제1 루프 안테나의 타단과 상기 접지 사이에 개재되며 상기 제1 인덕터와 동일한 인덕턴스 값을 갖는 제2 인덕터를 더 포함하고,상기 임피던스 매칭 라인은 상기 제1 루프 안테나의 중간 지점을 포함하는 영역에 형성되는 안테나.
- 제1항에 있어서,상기 제1 루프 안테나의 일단과 상기 급전 사이에 개재되는 제1 인덕터를 더 포함하고,상기 임피던스 매칭 라인은 상기 제1 루프 안테나의 일단과 타단 중 상기 일단에 가깝게 형성되는 안테나.
- 제1항에 있어서,상기 제1 루프 안테나의 타단과 상기 접지 사이에 개재되는 제2 인덕터를 더 포함하고,상기 임피던스 매칭 라인은 상기 제1 루프 안테나의 일단과 타단 중 상기 타단에 가깝게 형성되는 안테나.
- 제1항에 있어서,상기 임피던스 매칭 라인에는 갭 커플링 구조가 포함된 안테나.
- 제1항에 있어서,상기 임피던스 매칭 라인에는 슬롯이 포함된 안테나.
- 제1항에 있어서, 상기 급전은상기 제1 루프 안테나와 상기 제2 루프 안테나를 분기시키는 분기선로;일단이 상기 분기선로와 연결되고 타단이 상기 접지와 연결되는 루프 구조의 제1 급전선로; 및일단이 메인 회로부와 연결되고 타단이 상기 접지와 연결되며 상기 제1 급전선로와 유도성 결합되는 루프 구조의 제2 급전선로를 포함하는 안테나.
- 제1항 내지 제13항 중 어느 한 항에 따른 안테나를 포함하는 통신 장치.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015514903A JP2015521451A (ja) | 2012-06-01 | 2013-05-31 | アンテナ及びこれを備える通信装置 |
| CN201380028908.7A CN104488138A (zh) | 2012-06-01 | 2013-05-31 | 天线及包含其的通信装置 |
| US14/404,941 US9660343B2 (en) | 2012-06-01 | 2013-05-31 | Antenna and communication device comprising same |
| EP13797322.8A EP2846402A4 (en) | 2012-06-01 | 2013-05-31 | ANTENNA AND COMMUNICATION DEVICE COMPRISING THE SAME |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020120059243A KR101323134B1 (ko) | 2012-06-01 | 2012-06-01 | 안테나 및 이를 포함하는 통신 장치 |
| KR10-2012-0059243 | 2012-06-01 |
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| Publication Number | Publication Date |
|---|---|
| WO2013180479A1 true WO2013180479A1 (ko) | 2013-12-05 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2013/004743 Ceased WO2013180479A1 (ko) | 2012-06-01 | 2013-05-31 | 안테나 및 이를 포함하는 통신 장치 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9660343B2 (ko) |
| EP (1) | EP2846402A4 (ko) |
| JP (1) | JP2015521451A (ko) |
| KR (1) | KR101323134B1 (ko) |
| CN (1) | CN104488138A (ko) |
| WO (1) | WO2013180479A1 (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9660343B2 (en) | 2012-06-01 | 2017-05-23 | Emw Co., Ltd. | Antenna and communication device comprising same |
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| US10290940B2 (en) * | 2014-03-19 | 2019-05-14 | Futurewei Technologies, Inc. | Broadband switchable antenna |
| WO2016182801A1 (en) * | 2015-05-11 | 2016-11-17 | Carrier Corporation | Antenna with reversing current elements |
| JP6883771B2 (ja) * | 2017-02-01 | 2021-06-09 | パナソニックIpマネジメント株式会社 | 電子機器 |
| US11289811B2 (en) * | 2017-08-24 | 2022-03-29 | Mediatek Inc. | Closed-loop antenna with multiple grounding points |
| CN109861000B (zh) * | 2019-03-01 | 2024-05-31 | 深圳市信维通信股份有限公司 | 紧凑型5g mimo天线系统及移动终端 |
| CN112054292B (zh) * | 2019-06-06 | 2022-11-08 | 青岛海信移动通信技术股份有限公司 | 一种移动终端和天线装置 |
| JP7324858B2 (ja) * | 2019-10-23 | 2023-08-10 | Fcnt株式会社 | アンテナ装置および無線通信装置 |
| CN117134106A (zh) * | 2022-05-19 | 2023-11-28 | 华为技术有限公司 | 印刷天线以及通信设备 |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2846402A4 (en) | 2016-01-06 |
| US20150123855A1 (en) | 2015-05-07 |
| JP2015521451A (ja) | 2015-07-27 |
| EP2846402A1 (en) | 2015-03-11 |
| US9660343B2 (en) | 2017-05-23 |
| CN104488138A (zh) | 2015-04-01 |
| KR101323134B1 (ko) | 2013-10-30 |
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