EP0714151A1 - Breitbandige Monopolantenne in uniplanarer gedruckter Schaltungstechnik und Sende- und/oder Empfangsgerät mit einer derartiger Antenne - Google Patents

Breitbandige Monopolantenne in uniplanarer gedruckter Schaltungstechnik und Sende- und/oder Empfangsgerät mit einer derartiger Antenne Download PDF

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Publication number
EP0714151A1
EP0714151A1 EP95460040A EP95460040A EP0714151A1 EP 0714151 A1 EP0714151 A1 EP 0714151A1 EP 95460040 A EP95460040 A EP 95460040A EP 95460040 A EP95460040 A EP 95460040A EP 0714151 A1 EP0714151 A1 EP 0714151A1
Authority
EP
European Patent Office
Prior art keywords
antenna
radiating
main surface
antenna according
supply line
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.)
Granted
Application number
EP95460040A
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English (en)
French (fr)
Other versions
EP0714151B1 (de
Inventor
Patrice Brachat
Christian Sabatier
Roger Behe
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.)
Orange SA
Original Assignee
France Telecom SA
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 France Telecom SA filed Critical France Telecom SA
Publication of EP0714151A1 publication Critical patent/EP0714151A1/de
Application granted granted Critical
Publication of EP0714151B1 publication Critical patent/EP0714151B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01Q13/106—Microstrip slot 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
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
    • H01Q9/0457—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means electromagnetically coupled to the feed line
    • 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 field of the invention is that of radio transmissions. More specifically, the invention relates to transmit and / or receive antennas, in particular for equipment of reduced size, such as portable devices.
  • the invention thus applies, in particular, to radio communication systems with mobiles.
  • the extension of radiocommunication networks with land mobiles requires the development of portable autonomous stations having the dual functionality of transmitting and receiving microwave signals. These stations must therefore include an integrated antenna.
  • These antennas are generally in the form of a radiating element located outside of a metal case, for example of rectangular shape, constituting the shielding of one or more electronic cards ensuring in particular modulation and demodulation functions. microwave signals, in transmission and reception respectively.
  • a first known type of antenna is the half-wave doublet, that is to say a doublet of length ⁇ / 2, with ⁇ the operating wavelength.
  • the half-wave doublet which generally consists of elements of two-wire lines (that is to say of conductive cylindrical rods) supplied by a supply line, has relatively broadband performance, which makes it usable in many applications.
  • balun is traditionally presented as a transformer involving localized or distributed impedances, and allowing, when placed between a symmetrical radiating element and an asymmetrical supply line, to make the currents symmetrical on the radiating structure.
  • balun has the major drawback of requiring always delicate focusing.
  • Half-wave doublets are also known which are self-symmetrized, so that they can be used without a balun.
  • conductive cylindrical rods due to the use of conductive cylindrical rods, such an autosymmetry characteristic can only be obtained at the cost of increased complexity of the antenna structure.
  • the half-wave doublets with cylindrical rods have difficult mechanical handling as well as a space which is still too large (although reduced), the minimum length of the antenna being imposed by the length of the main strands. , or about ⁇ / 2.
  • a second type of antenna even more compact than the half-wave doublet, was therefore designed.
  • This is the inverted F antenna, which consists of a horizontal rectangular conductive element and a vertical rectangular conductive element.
  • the vertical element performs a short-circuit function on the horizontal element, by connecting one of its ends to a ground plane.
  • this antenna has very frequency dispersive characteristics, and therefore, consequently, a very low bandwidth, and for example of the order of 2 to 3%. This is due to the fact that this antenna structure behaves substantially like a ⁇ / 4 resonator.
  • the bandwidth of an antenna is defined here as the frequency band over which the Standing Wave Ratio (ROS) is less than 2. This last parameter represents the ability of the antenna to transmit the active power which is which is most critical for small antennas.
  • ROS Standing Wave Ratio
  • This quantity is directly linked to the input impedance of the antenna, which must be adapted to the impedance of the transmission line carrying the microwave signal to be transmitted and / or received.
  • this impedance remains appreciably constant (that is to say that the ROS remains lower than 2, a ROS equal to 1 corresponding to a perfect adaptation) on a large band of frequency.
  • a bandwidth of 2 to 3% as obtained using an inverted F antenna is generally insufficient.
  • the invention particularly aims to overcome the drawbacks of the various known types of antenna, and in particular those of half-wave dipoles and antennas in inverted F.
  • an objective of the invention is to provide a compact antenna having a large pass.
  • the object of the invention is in particular to provide such an antenna, the bandwidth of which is at least of the order of 20 to 30% and having a reduced size, in particular compared to an antenna in inverted F.
  • the invention also aims to provide a self-symmetrized antenna, and therefore requiring no balun.
  • the invention also aims to provide such an antenna, which can operate over a wide range of input impedances, and in particular for input impedances between 10 and 200 Ohms.
  • the antenna of the invention is therefore produced in printed technology, which allows a considerable saving of space and a much easier mechanical maintenance.
  • the main surface of the conductive deposit by constituting a ground plane for the supply line, ensures that the supply is self-symmetrized.
  • the antenna according to the invention does not require the joint use of a balun.
  • the supply line feeds the radiating strand through the coupling slot.
  • the antenna according to the invention is notably based on a new and inventive adaptation of the inverted F antenna.
  • the two-dimensional configuration of the inverted F antenna was projected into a single plane containing the entire antenna.
  • the radiating strand and the ground plane are no longer in two separate parallel planes, but in the same plane.
  • the antenna of the invention is therefore much more compact since the height h is overcome between the radiating strand (or horizontal conductive element) and the ground plane.
  • the antenna of the invention has a much wider bandwidth than that of an inverted F antenna. This is explained in particular by the fact that for the inverted F antenna, the radiating strand is located just above the ground plane and forms with it a cavity which is very selective in frequency (generally 2 to 3% bandwidth). On the other hand, in the case of the invention, the ground plane and the strand radiant are located in the same plane, so that the cavity effect is much less marked. This makes it possible to reach bandwidths close to 25%, and to simultaneously cover the transmission band and the reception band.
  • said supply line and said coupling slot intersect at a point called cross point, said supply line having an end portion, or series stub, extending beyond said cross point of a first adaptable length, and said coupling slot having an end portion, or parallel stub, extending beyond said crossing point of a second adaptable length.
  • At least one of the elements belonging to the group comprising said radiating strand, said main surface, and said coupling slot is of substantially rectangular shape.
  • said conductive deposit comprises at least two radiating strands, the longitudinal space between each of said radiating strands and said main surface forming a separate coupling slot.
  • the antenna comprises at least two supply lines, each of said radiating strands cooperating with one of said supply lines.
  • said radiating strand has at least one bend, so that said radiating strand extends at least partially along at least two sides of said main surface.
  • the overall size of the antenna is limited since the minimum dimension of the antenna is no longer linked to the total length of the radiating strand but only to the length of the sides of the main surface of the conductive deposit.
  • said radiating strand has a variable width.
  • the bandwidth of the antenna is increased.
  • said radiating strand has at least one recess on at least one of the longitudinal edges and / or at least one lumen on its surface.
  • the light on the surface of the radiating strand is for example a slit.
  • the antenna also comprises a ground plane placed at a predetermined distance from said feed line.
  • ground plane is without radiating element, it makes it possible to remove the parasitic radiation from the supply line and to obtain radiation in a half-space only.
  • said ground plane is a conductive deposit of the same shape as that located on the second face of said substrate plate, comprising a main surface and at least one radiating strand.
  • the ground plane makes it possible to obtain symmetrical radiation on each side of the antenna.
  • said supply line has an impedance substantially between 10 Ohms and 200 Ohms.
  • the length of said radiating strand is substantially between ⁇ / 8 and ⁇ / 4, ⁇ being the wavelength of said microwave signals.
  • the invention also relates to a device for transmitting and / or receiving microwave signals, comprising at least one antenna as described above.
  • the invention therefore relates to a reduced-size antenna with wide bandwidth.
  • This antenna is in particular intended to equip portable devices, and for example transmitters / receivers of radiocommunication networks with land mobiles.
  • FIGS. 1A and 1B which are respectively a top view and a side view, illustrate a first embodiment of the invention.
  • the antenna comprises a substrate plate 1 (not shown in FIG. 1), a supply line 2 and a conductive deposit 3.
  • the supply line 2 is located on a first face (the lower face for example) of the substrate plate 1. It is for example a microstrip line.
  • the conductive deposit 3, for example of copper, is located on a second face (the upper face for example) of the substrate plate 1 and can decompose (fictitiously, since it is in practice made in one piece) into three parts: a main surface 4, an intermediate part 5 and a radiating strand 6.
  • the main surface 4 (rectangular in this example) of the conductive deposit 3 constitutes a ground plane for the supply line 2 situated on the other face of the substrate plate 1.
  • the antenna therefore generates symmetrical currents on the radiating strand 6.
  • the antenna of the The invention is self-symmetrized.
  • the radiating strand 6 is rectangular and has a first end connected to the main surface 4 of the conductive deposit 3 by the intermediate part 5, and a second free end extending partially along one side of the main surface. 4 from driver's depot 3.
  • the length of the radiating strand 6 is close to ⁇ / 4, with ⁇ the operating wavelength of the antenna.
  • the antenna of the invention which is planar and whose maximum length is ⁇ / 4, has a smaller footprint than that of a dipole of length ⁇ / 2 or even that of an antenna in inverted F of length ⁇ / 4 but whose radiating strand is spaced a height h from the ground plane.
  • the antenna of the invention has not only a very small footprint but also a large bandwidth. Indeed, the main surface 4 of the conductive deposit 3 behaves like a ground plane especially with respect to the supply line 2 and the coupling slot 7, and very little with respect to the radiating strand 6, which greatly reduces the selectivity of the antenna. In addition, the cavity effect (and therefore the selectivity of the antenna) is much less marked than for an inverted F antenna since the ground plane (that is to say the main surface 4 of the conductive deposit 3 ) and the radiating strand 6 are located in the same plane.
  • the antenna according to the invention has a bandwidth of 20 to 30% and can be easily incorporated inside an ultra-light portable handset.
  • the longitudinal space between the radiating strand 6 and the main surface 4 of the conductive deposit 3 forms a coupling slot 7 by means of which the supply line 2 supplies the radiating strand 6.
  • the coupling slot 7 is also rectangular.
  • FIG 2 is a partial detailed view of the antenna shown in Figure 1A.
  • the antenna of the invention comprises a serial stub and a parallel stub.
  • These series and parallel stubs allow the adaptation of the antenna according to the known principle of double stub adaptation, over a wide frequency band.
  • FIG. 3 shows a variation curve, as a function of frequency, of the standing wave ratio (or ROS) for an example of antenna according to the first embodiment of FIGS. 1A and 2.
  • This curve is used to calculate the passband [f1, f2], defined here as the frequency band for which the ROS remains below 2.
  • This passband can also expressed as a percentage, obtained by dividing the width (f2, f1) of the passband by the center frequency f3 of this band.
  • the antenna according to the invention therefore has a pass band wide enough to simultaneously cover the transmit band and the receive band.
  • Figure 4 shows a variation curve, in a Smith chart, of the input impedance for the previous antenna example. Note the presence of a loop around the center of the abacus (which is the perfect adaptation point compared to a 50 ⁇ supply line). This loop guarantees low frequency dispersion and translates the efficiency of the adaptation.
  • the antenna is not, in this example, perfectly optimized. Indeed, better centering of the loop relative to the center of the Smith chart would increase the performance of the antenna.
  • the impedance of the supply line carrying the HF signal to be transmitted was fixed at 50 ⁇ , but this value does not constitute a determining characteristic, because the input impedance of the antenna according to the invention can take any value between 10 and 200 ⁇ .
  • FIG. 5 shows a top view of a second embodiment of the antenna according to the invention.
  • This second embodiment differs from the first in that the radiating strand 6 has a bend 51 and extends along two sides of the main surface 4 of the conductive deposit 3.
  • the overall size of the antenna is further reduced. If the length of radiating strand 6 is equal to ⁇ / 4, it is possible, by creating a bend 51 at mid-length, to reach dimensions close to ⁇ / 8.
  • the elbow 51 is not necessarily in the center of the radiating strand 6, or that the radiating strand 6 may include more than one elbow, so as to extend along more than two sides of the surface. main 4.
  • FIG. 6 presents a top view of a third embodiment of the antenna according to the invention.
  • This third embodiment differs from the first in that the radiating strand 6 has a variable width over its length. This variable width, when chosen appropriately, makes it possible to increase the bandwidth of the antenna.
  • the radiating strand 6 has a recess 61, 62 on each of its longitudinal edges. It should be noted that in other embodiments, the radiating strand 6 may have a slit in the middle, or have several recesses on each of its longitudinal edges, or even have one or more recesses on only one of its longitudinal edges .
  • FIG. 7 shows a top view of a fourth embodiment of the antenna according to the invention.
  • the antenna comprises several radiating strands 6 A , 6 B , 6 C , 6 D (four in this example).
  • Each radiating strand 6 A , 6 B , 6 C , 6 D is connected to the main surface 4 by an intermediate part 5 A , 5 B , 5 C , 5 D , and each longitudinal space comprised between a radiating strand 6 A , 6 B , 6 C , 6 D and the main surface 4 forms a separate coupling slot 6 A , 6 B , 6 C , 6 D.
  • the radiating strands 6 A , 6 B , 6 C , 6 D may or may not be identical.
  • a single supply line can supply all the radiating strands 6 A , 6 B , 6 C , 6 D , or else several supply lines can be used.
  • a single supply line can supply all the radiating strands 6 A , 6 B , 6 C , 6 D , or else several supply lines can be used.
  • the antenna comprises means 71 for shaping the HF signals received from a main supply line (not shown) and to be transmitted on the various secondary supply lines 2 A , 2 B , 2 C , 2 D associated with the different radiating strands 6 A , 6 B , 6 C , 6 D.
  • the elements (dividers, phase shifters) constituting the means 71 for shaping the signals can be produced by different lengths of supply lines, by hybrid rings, or by any other solution known to those skilled in the art and realizing the desired function.
  • the antenna may for example comprise another ground plane, placed at a predetermined distance from the supply line and separated from the latter by air or by a dielectric.
  • the antenna comprises the following successive layers: a ground plane, a dielectric, a supply line, a substrate plate and a conductive deposit.
  • the role of the additional ground plane is for example to suppress stray radiation from the supply line and to obtain radiation in only half a space.
  • the additional ground plane is produced in the form of a conductive deposit also comprising a main surface and a radiating strand associated with a slot. In this case, symmetrical radiation is obtained on each side of the antenna.
  • a radiating strand may have a variable width and extend on two sides of the main surface of the conductive deposit.
  • the invention also relates to any device for transmitting and / or receiving microwave signals equipped with an antenna according to the invention.
  • a device can comprise several antennas, and in particular a transmitting antenna and a receiving antenna.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Waveguide Aerials (AREA)
  • Support Of Aerials (AREA)
  • Transceivers (AREA)
EP95460040A 1994-11-22 1995-11-06 Breitbandige Monopolantenne in uniplanarer gedruckter Schaltungstechnik und Sende- und/oder Empfangsgerät mit einer derartiger Antenne Expired - Lifetime EP0714151B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9414198 1994-11-22
FR9414198A FR2727250A1 (fr) 1994-11-22 1994-11-22 Antenne large bande monopole en technologie imprimee uniplanaire et dispositif d'emission et/ou de reception incorporant une telle antenne

Publications (2)

Publication Number Publication Date
EP0714151A1 true EP0714151A1 (de) 1996-05-29
EP0714151B1 EP0714151B1 (de) 2003-09-03

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EP95460040A Expired - Lifetime EP0714151B1 (de) 1994-11-22 1995-11-06 Breitbandige Monopolantenne in uniplanarer gedruckter Schaltungstechnik und Sende- und/oder Empfangsgerät mit einer derartiger Antenne

Country Status (5)

Country Link
US (1) US5835063A (de)
EP (1) EP0714151B1 (de)
JP (1) JPH08256009A (de)
DE (1) DE69531655T2 (de)
FR (1) FR2727250A1 (de)

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EP0929121A1 (de) * 1998-01-09 1999-07-14 Nokia Mobile Phones Ltd. Antenne für mobiles Kommunikationsgerät
WO1999014861A3 (en) * 1997-09-17 1999-08-05 Logitech Inc Antenna system and apparatus for radio-frequency wireless keyboard
WO1999063616A1 (en) * 1998-05-29 1999-12-09 Ericsson, Inc. Non-protruding dual-band antenna for communications device
US6140970A (en) * 1999-04-30 2000-10-31 Nokia Mobile Phones Limited Radio antenna
FR2849964A1 (fr) * 2003-01-13 2004-07-16 Uniwill Comp Corp Structure d'un seul tenant incluant une antenne et un couvercle de blindage et son module sans fil
EP2584647A3 (de) * 2011-10-20 2013-10-09 ACER Incorporated Kommunikationsvorrichtung und Antennenstruktur dafür
WO2013182844A1 (en) * 2012-06-08 2013-12-12 Ucl Business Plc Antenna configuration for use in a mobile communication device
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WO2015124463A1 (de) * 2014-02-18 2015-08-27 Antennentechnik Bad Blankenburg Gmbh Mehrbereichsantenne für eine empfangs- und/oder sendeeinrichtung für den mobilen einsatz

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US6456243B1 (en) 2001-06-26 2002-09-24 Ethertronics, Inc. Multi frequency magnetic dipole antenna structures and methods of reusing the volume of an antenna
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US6573867B1 (en) 2002-02-15 2003-06-03 Ethertronics, Inc. Small embedded multi frequency antenna for portable wireless communications
JP3656610B2 (ja) * 2002-03-27 2005-06-08 日立電線株式会社 板状アンテナおよびそれを備えた電気機器
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US7123209B1 (en) 2003-02-26 2006-10-17 Ethertronics, Inc. Low-profile, multi-frequency, differential antenna structures
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TWI393291B (zh) * 2009-03-27 2013-04-11 Acer Inc 一種單極槽孔天線
TWI451631B (zh) 2010-07-02 2014-09-01 Ind Tech Res Inst 一種多頻天線以及使天線可多頻操作之方法
US8610626B2 (en) 2010-12-09 2013-12-17 Industrial Technology Research Institute Antenna with slot
TWI508367B (zh) 2012-09-27 2015-11-11 Ind Tech Res Inst 通訊裝置及其天線元件之設計方法
US9252502B2 (en) 2013-06-18 2016-02-02 Telefonaktiebolaget L M Ericsson (Publ) Inverted F-antennas at a wireless communication node
US9742063B2 (en) 2014-06-13 2017-08-22 Arcadyan Technology Corporation External LTE multi-frequency band antenna
EP3367504B1 (de) 2017-02-27 2019-01-23 Sick AG Antenne für eine rfid-lesevorrichtung und verfahren zum senden und/oder empfangen von rfid-signalen

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CN100380733C (zh) * 1997-09-17 2008-04-09 罗杰泰克欧洲股份有限公司 用于射频无线键盘的天线系统和装置
WO1999014861A3 (en) * 1997-09-17 1999-08-05 Logitech Inc Antenna system and apparatus for radio-frequency wireless keyboard
GB2345581A (en) * 1997-09-17 2000-07-12 Logitech Inc Antenna system and apparatus for radio-frequency wirless keyboard
US6138050A (en) * 1997-09-17 2000-10-24 Logitech, Inc. Antenna system and apparatus for radio-frequency wireless keyboard
EP0929121A1 (de) * 1998-01-09 1999-07-14 Nokia Mobile Phones Ltd. Antenne für mobiles Kommunikationsgerät
US6025802A (en) * 1998-01-09 2000-02-15 Nokia Mobile Phones Limited Antenna for mobile communications device
EP0929115A1 (de) * 1998-01-09 1999-07-14 Nokia Mobile Phones Ltd. Antenne für mobiles Kommunikationsgerät
WO1999063616A1 (en) * 1998-05-29 1999-12-09 Ericsson, Inc. Non-protruding dual-band antenna for communications device
US6016126A (en) * 1998-05-29 2000-01-18 Ericsson Inc. Non-protruding dual-band antenna for communications device
US6140970A (en) * 1999-04-30 2000-10-31 Nokia Mobile Phones Limited Radio antenna
US6937205B2 (en) 2003-01-13 2005-08-30 Uniwill Computer Corporation Integral structure including an antenna and a shielding cover and wireless module thereof
FR2849964A1 (fr) * 2003-01-13 2004-07-16 Uniwill Comp Corp Structure d'un seul tenant incluant une antenne et un couvercle de blindage et son module sans fil
EP2584647A3 (de) * 2011-10-20 2013-10-09 ACER Incorporated Kommunikationsvorrichtung und Antennenstruktur dafür
US9325059B2 (en) 2011-10-20 2016-04-26 Acer Incorporated Communication device and antenna structure thereof
WO2013182844A1 (en) * 2012-06-08 2013-12-12 Ucl Business Plc Antenna configuration for use in a mobile communication device
US9559431B2 (en) 2012-06-08 2017-01-31 Ucl Business Plc Antenna configuration for use in a mobile communication device
WO2015124463A1 (de) * 2014-02-18 2015-08-27 Antennentechnik Bad Blankenburg Gmbh Mehrbereichsantenne für eine empfangs- und/oder sendeeinrichtung für den mobilen einsatz
CN104134857A (zh) * 2014-08-01 2014-11-05 清华大学 一种八频段平面印刷手机天线
CN104134857B (zh) * 2014-08-01 2016-05-18 清华大学 一种八频段平面印刷手机天线

Also Published As

Publication number Publication date
US5835063A (en) 1998-11-10
FR2727250A1 (fr) 1996-05-24
JPH08256009A (ja) 1996-10-01
EP0714151B1 (de) 2003-09-03
DE69531655T2 (de) 2004-06-24
DE69531655D1 (de) 2003-10-09
FR2727250B1 (de) 1997-02-07

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