EP1460713A1 - Kompakte Diversity-Antenne - Google Patents

Kompakte Diversity-Antenne Download PDF

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Publication number
EP1460713A1
EP1460713A1 EP03075785A EP03075785A EP1460713A1 EP 1460713 A1 EP1460713 A1 EP 1460713A1 EP 03075785 A EP03075785 A EP 03075785A EP 03075785 A EP03075785 A EP 03075785A EP 1460713 A1 EP1460713 A1 EP 1460713A1
Authority
EP
European Patent Office
Prior art keywords
antenna
ground
recited
antenna elements
diversity
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
EP03075785A
Other languages
English (en)
French (fr)
Other versions
EP1460713B1 (de
Inventor
Zhinong Ying
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.)
Sony Mobile Communications AB
Original Assignee
Sony Ericsson Mobile Communications AB
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 Sony Ericsson Mobile Communications AB filed Critical Sony Ericsson Mobile Communications AB
Priority to DE60318813T priority Critical patent/DE60318813T2/de
Priority to EP03075785A priority patent/EP1460713B1/de
Priority to AT03075785T priority patent/ATE385052T1/de
Priority to US10/549,717 priority patent/US7405697B2/en
Priority to PCT/EP2004/001503 priority patent/WO2004084344A1/en
Priority to CN200480007359.6A priority patent/CN1816941B/zh
Publication of EP1460713A1 publication Critical patent/EP1460713A1/de
Application granted granted Critical
Publication of EP1460713B1 publication Critical patent/EP1460713B1/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
    • 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
    • H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means
    • 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
    • H01Q21/245—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction provided with means for varying the polarisation 

Definitions

  • the present invention relates generally to antennas for radio communication terminals and, in particular, to compact antennas devised to be incorporated into portable terminals, and which are capable of transmission and reception diversity.
  • PCNs Personal Communication Networks
  • PIFA planar inverted-F antennas
  • a dominant-mode patch antenna is often used as a flat antenna.
  • An antenna of this structure comprises a ceramic substrate and a patch antenna element provided on the surface of the ceramic substrate. Further, a ground conductor provided on the side of the ceramic substrate opposite to the side where the patch antenna element is disposed.
  • a feeding pin is connected to a feeding section provided on the reverse side of the patch antenna element, by way of a through hole formed in the ceramic substrate and through the ground conductor.
  • two sides which are orthogonal to each other within a plane must be formed to an electrical length of substantially 1/2 wavelength.
  • a dielectric substrate having a large dielectric constant must be used as the dielectric substrate.
  • the length of the side of the antenna in a GPS vehicle-mounted receiving terminal has been reduced to about one-fifth the size of a receiving terminal which is embodied without use of a substrate of high dielectric constant. Still, this means a side length of about 20 to 25 mm which, in applications involving use of a small communications device such as a portable receiving terminal, adds to much volume and weight to the terminal.
  • the above-mentioned PIFA is easier miniaturised, but is devised for linearly-polarised radio waves.
  • US patent No. 6,369,762 to Yanagisawa et al., assigned to Yokowo Co. targets the drawbacks of prior art antennas, particularly pointing out and describing the dominant-mode patch antenna, and proposes an antenna for circularly-polarised waves having a pair of electrodes for radiating a linearly-polarised wave which are provided substantially in parallel with a ground conductor plane, with an excitation electrode interposed there between.
  • a feeding section is electrically connected to the excitation electrode, wherein first ends of the respective radiation electrodes oppose to the excitation electrode, thereby constituting capacitive coupling. Second ends of the respective radiation electrodes are connected to the ground conductor plane such that the directions in which electric fields are to be excited become substantially orthogonal to each other.
  • the structure of the antenna is substantially L shaped, with each of the two orthogonal arms having an electrical length of 1 ⁇ 4 of a particular radio wavelength.
  • a diversity radio antenna comprising a ground substrate, first and second elongated antenna elements, each extending between respective first and second opposing ends in a plane parallel to and spaced from said ground substrate, and an excitation electrode interposed between said respective first ends.
  • the ground connector switch means are devised to selectively connect and disconnect said ground substrate to said antenna elements, for controlling radiation beam pattern and polarisation diversity of the antenna.
  • said ground connector switch means are devised to selectively connect and disconnect said respective second ends of the antenna elements to ground.
  • said antenna elements extend substantially perpendicular to each other in said plane.
  • said ground connector switch means comprises a MEMS switch.
  • said excitation electrode is capacitively coupled to said respective first ends of said antenna elements.
  • said ground connector switch means are devised to connect said first and second antenna elements to ground, for adapting the antenna to a circularly-polarised radio wave. Furthermore, said ground connector switch means are preferably devised to connect one of said first and second antenna elements to ground, and disconnect the other of said first and second antenna elements from ground, for adapting the antenna to a linearly-polarised radio wave.
  • said ground connector switch means are devised to selectively connect said first and second antenna elements to ground for adapting the antenna to a circularly-polarised radio wave, or disconnect one of said first and second antenna elements from ground for adapting the antenna to a linearly-polarised radio wave.
  • said ground connector switch means are devised to selectively connect said ground substrate to said antenna elements over a predetermined impedance, preferably over a predetermined inductive impedance.
  • each of said first and second antenna elements have an electrical length of one quarter of a predetermined radio frequency wavelength.
  • a dielectric member is interposed between said plane and said ground substrate, e.g. made from a ceramic material.
  • said antenna elements and said excitation electrode are preferably provided on a first surface of the dielectric member, whereas said ground substrate is formed adjacent to a second surface of said dielectric member, opposite and parallel to said first surface.
  • said excitation electrode are formed by a coat of an electrically conductive material provided on said first surface, whereas a first and a second spacing between said excitation electrode and said first and second antenna element, respectively, are formed by etching of said coat.
  • a radio frequency feed conductor extends from said excitation electrode along a side surface of said dielectric member, to a feed pad at said second surface.
  • said ground substrate is formed as a material layer in a printed circuit board.
  • a radio communication terminal comprising a diversity radio antenna having any of the features recited above.
  • radio terminals refers to radio terminals as a device in which to implement a radio antenna design according to the present invention.
  • the term radio terminal includes all mobile equipment devised for radio communication with a radio station, which radio station also may be mobile terminal or e.g. a stationary base station. Consequently, the term radio terminal includes mobile telephones, pagers, communicators, electronic organisers, smartphones, PDA:s (Personal Digital Assistants), vehicule-mounted radio communication devices, or the like, as well as portable laptop computers devised for wireless communication in e.g. a WLAN (Wireless Local Area Network).
  • the term radio terminal should also be understood as to include any stationary device arranged for radio communication, such as e.g.
  • DRA L-shaped dielectric resonator antenna
  • DRAs are known as miniaturised antennas of ceramics or another dielectric medium for microwave frequencies.
  • a dielectric resonator whose dielectric medium, which has a relative permittivity of ⁇ r >>1, is surrounded by air, has a discrete spectrum of eigenfrequencies and eigenmodes due to the electromagnetic limiting conditions on the boundary surfaces of the dielectric medium. These conditions are defined by the special solution of the electromagnetic equations for the dielectric medium with the given limiting conditions on the boundary surfaces.
  • the radiation of power is the main item in a resonator antenna. Since no conducting structures are used as a radiating element, the skin effect cannot be detrimental. Therefore, such antennas have low-ohmic losses at high frequencies.
  • a compact, miniaturised structure may be achieved since the dimensions may be reduced for a preselected eigenfrequency (transmission and reception frequency) by increasing ⁇ r .
  • the dimensions of a DRA of a given frequency are substantially inversely proportional to ⁇ r .
  • ⁇ r by a factor of ⁇ thus causes a reduction of all the dimensions by the factor ⁇ and thus of the volume by a factor of ⁇ 3/2 , while the resonant frequency is kept the same.
  • a material for a DRA is to be suitable for use at high frequencies, have small dielectric losses and temperature stability. This strongly limits the materials that can be used. Suitable materials have ⁇ r values of typically a maximum of 120. Besides this limitation of the possibility of miniaturisation, the radiation properties of a DRA degrade with a rising ⁇ r .
  • Fig. 1 schematically illustrates a compact diversity radio antenna according to a first embodiment of the present invention
  • Fig. 2 illustrates the same embodiment as seen from an opposite angle.
  • the antenna is carried on a support structure, such as a printed circuit board, PCB, preferably defining a substantially plane support surface.
  • the support structure includes an electrical ground substrate 1, which may cover a major portion of the support structure. Alternatively, the ground substrate 1 may be confined to a portion of the support structure, over which portion the antenna is placed.
  • the ground substrate 1 is preferably realised as a material layer on an outer side or an intermediate layer of a PCB. In another embodiment, the ground substrate may be formed directly on a bottom side of the antenna. In Fig. 1, the ground substrate 1 is illustrated as a flat substrate extending beyond the antenna.
  • the antenna is placed on or adjacent to the ground substrate 1, and comprises a substantially L-shaped dielectric member 11, having two substantially perpendicular legs extending parallel to ground substrate 1.
  • the dielectric member 11 is made of a material having a high dielectric constant, preferably a ceramic. Non-exclusive examples of such materials include BaO-TiO 2 -SnO 2 and MgO-CaO-TiO 2 , which have a relative dielectric constant of about 30 or more.
  • the dielectric member 11 has a first surface, the upper surface as illustrated in the drawing, facing away from ground substrate 1, and a second surface which is opposite and parallel to the first surface.
  • the second surface is arranged at least adjacent to the ground substrate 1, and potentially in direct contact with the ground substrate 1, whereas the first surface defines a plane which is parallel to and spaced from ground substrate 1.
  • the dielectric member preferably has straight side surfaces extending between and perpendicular to the first and second surfaces.
  • the structure of the antenna is predominantly arranged on the first surface of the dielectric member 11.
  • An excitation electrode 4 is arranged at the intersection of the legs of dielectric member 11.
  • the excitation electrode is connected to a feed pad 13 on the second surface of dielectric member 11, by means of a feed conductor 12 extending along one of the side surfaces of dielectric member 11.
  • the feed pad 13 is only schematically illustrated in the drawing, indicating that a conductive pad connected to the feed conductor 12 is located under the marked comer of the dielectric member 11.
  • the feed pad is connectable to a radio frequency circuit, preferably carried by a PCB acting as said support structure.
  • the antenna further comprises two substantially elongated antenna elements 2,3, extending in the plane defined by the first surface of dielectric member 11.
  • a first antenna element 2 extends along a first leg of dielectric member 11, from a first end 5, spaced by a gap 14 from excitation electrode 4, to a second end 7. Gap 14 provides a capacitive coupling between excitation electrode 4 and antenna element 2, for transmission and reception of radio waves.
  • a second antenna element 3 extends along a second leg of dielectric member 11, from a first end 6, spaced by a gap 15 from excitation electrode 4, to a second end 8.
  • gap 15 provides a capacitive coupling between excitation electrode 4 and antenna element 3, for transmission and reception of radio waves.
  • Each of the two antenna elements 2,3 preferably has an electrical length of 1 ⁇ 4 of a centre wavelength for a predetermined radio frequency band. However, the physical length is dependent on the dielectric constant ⁇ r .
  • the antenna structure including the excitation electrode 4 and the antenna elements 2,3, are shaped by first coating the first surfaces of the dielectric member 11 with a conductive material, by means of a suitable process. Second, the separate elements 2-4, and the gaps 14,15, are created by dry or wet etching of the coating material from the first surface. Also the feed conductor 12 may be defined in this process.
  • antenna elements 2,3 are rectangular, and the excitation electrode 4 extends a short portion into each of the legs of the first surface of dielectric member 11. However, it should be noted that this is only one particular embodiment, and that other shapes are possible.
  • Fig. 3 illustrates a second embodiment, only showing the antenna elements 2,3 and excitation electrode 4.
  • excitation electrode 4 is rectangular, or even quadratic, and therefore does not extend into the legs of the first surface of dielectric member 11.
  • Fig. 4 illustrates a third exemplary embodiment, in which excitation electrode 4 extends substantially diagonally over the intersection of the legs of the dielectric member 11. Also the first ends 5 and, respectively, of the antenna elements 2,3 are angled such that the gaps 14,15 have constant widths. Other specific embodiments of the pattern of the antenna structure are of course possible, and the antenna elements may e.g. be meandered in their extension between the respective first ends 5,6 and second ends 7,8.
  • the antenna elements 2,3 are selectively connected to ground substrate 1, by means of ground connector switch means 9,10.
  • the ground connector switch means 9,10 are preferably devised to connect the antenna elements at their respective second, or outer, ends 7,8, to ground substrate 1.
  • the ground connector switch means 9,10 are devised to connect the antenna elements at other portions thereof to ground substrate 1, such as at respective side edges of the elongated antenna elements 2,3.
  • each of the antenna elements 2,3 capacitively cooperates with excitation electrode 4 to form antennas adapted for transmission and reception of a linearly-polarised wave.
  • the resonance frequency of each of the antenna elements 2 and 3 can be freely adjusted by changing the electrical length of each of the antenna elements 2 and 3. As long as the resonance frequency of either of the antenna element 2 and 3 is shifted upward relative to the centre frequency to be used, and the resonance frequency of the remaining antenna element is shifted downward relative to the same, as required, the phase of electromagnetic wave originating from one of the antenna elements can be shifted from the phase of the electromagnetic wave originating from the other antenna element.
  • the resonance frequencies of the antenna elements 2,3 are adjusted such that a 90-degrees phase shift arises between the electromagnetic waves.
  • a circularly-polarised wave can be transmitted and received through use of antenna elements 2 and 3 for a linearly-polarised wave and without use of a special feeding circuit, by adjusting the length of the antenna elements 2 and 3 and the degree of coupling between the antenna elements 2 and 3, which is achieved by adjusting the width of gaps 14,15 between the antenna elements 2 and 3 and excitation electrode 4.
  • FIG. 5 to 7 illustrate the function of the adaptable antenna according to the present invention, with the same reference numerals as in the previous drawings indicating corresponding elements.
  • First antenna element 2 has a first ground connector switch means 9, which selectively connects the antenna element 2 to ground
  • second antenna element 3 has second ground connector switch means 10, which selectively connects the antenna element 3 to ground.
  • Fig. 5 illustrates a state in which both ground connector switch means 9,10 are on, which means that both antenna elements 2,3 are connected to ground.
  • each ground connection passes through an impedance 16 and 17, respectively, in this specific embodiment.
  • the impedance is provided by an inductive member 16,17, such as a coil.
  • the inductive member 16,17 comprises a capacitive component.
  • the switching action is preferably controlled by a Micro ElectroMechanical Systems switch, a MEMS switch.
  • a MEMS has low insertion loss and low power consumption, which provides an advantageous power saving effect to the antenna.
  • the antenna is adapted for circular polarisation.
  • Fig. 6 illustrates a state in which first ground connector switch means 9 is on, whereas second ground connector switch means 10 is off. This means that in this state only antenna element 2 is connected to ground, while antenna element 3 is electrically held in free space. Only, or predominantly, the first antenna member 2 will in this case transmit or receive for the antenna, giving it a linear polarisation. With reference to Figs 1 and 2, the antenna has horizontal polarisation in this state.
  • Fig. 7 illustrates a state in which first ground connector switch means 9 is off, whereas second ground connector switch means 10 is on, meaning that in this state only antenna element 3 is connected to ground, while antenna element 2 is electrically held in free space. Only, or predominantly, the second antenna member 3 will in this case transmit or receive for the antenna, also giving it a linear polarisation. With reference to Figs 1 and 2, the antenna has vertical polarisation in this state.
  • the antenna according to the invention may advantageously be used as a compact adaptive antenna for diversity or MIMO application in a radio communication terminal.
  • the antenna elements 2,3 are selectively switched to ground through first and second different impedances, rather than to ground through an impedance or to free space. This will cause a resonance shift for the antenna elements 2,3, but will not affect the beam pattern and polarisation diversity to the same extent.
  • Fig. 8 illustrates a radio communication terminal in the embodiment of a cellular mobile phone 30, devised to incorporate an antenna in accordance with the invention.
  • the terminal 30 comprises a chassis or housing 35, carrying a user audio input in the form of a microphone 31 and a user audio output in the form of a loudspeaker 32 or a connector to an ear piece (not shown).
  • a set of keys, buttons or the like constitutes a data input interface 33 usable e.g. for dialling, according to the established art.
  • a data output interface comprising a display 34 is further included, devised to display communication information, address list etc in a manner well known to the skilled person.
  • the radio communication terminal 30 includes radio transmission and reception electronics (not shown) coupled to a built-in antenna inside the housing 35, which antenna is carried on a support structure indicated in the drawing by the dashed line as a substantially flat object, preferably a PCB.
  • this antenna e.g. corresponding to Fig. 1, includes a ground substrate 1, first and second elongated antenna elements 2,3, each extending between respective first 5,6 and second opposing ends 7,8 in a plane parallel to and spaced from said ground substrate, and an excitation electrode 4 interposed between said respective first ends.
  • Ground connector switch means 9,10 are devised to selectively connect and disconnect said ground substrate to said antenna elements, for controlling radiation beam pattern and polarisation diversity of the antenna.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)
EP03075785A 2003-03-18 2003-03-18 Kompakte Diversity-Antenne Expired - Lifetime EP1460713B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE60318813T DE60318813T2 (de) 2003-03-18 2003-03-18 Kompakte Diversity-Antenne
EP03075785A EP1460713B1 (de) 2003-03-18 2003-03-18 Kompakte Diversity-Antenne
AT03075785T ATE385052T1 (de) 2003-03-18 2003-03-18 Kompakte diversity-antenne
US10/549,717 US7405697B2 (en) 2003-03-18 2004-02-18 Compact diversity antenna
PCT/EP2004/001503 WO2004084344A1 (en) 2003-03-18 2004-02-18 Compact diversity antenna
CN200480007359.6A CN1816941B (zh) 2003-03-18 2004-02-18 小型分集天线

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03075785A EP1460713B1 (de) 2003-03-18 2003-03-18 Kompakte Diversity-Antenne

Publications (2)

Publication Number Publication Date
EP1460713A1 true EP1460713A1 (de) 2004-09-22
EP1460713B1 EP1460713B1 (de) 2008-01-23

Family

ID=32798952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03075785A Expired - Lifetime EP1460713B1 (de) 2003-03-18 2003-03-18 Kompakte Diversity-Antenne

Country Status (4)

Country Link
EP (1) EP1460713B1 (de)
CN (1) CN1816941B (de)
AT (1) ATE385052T1 (de)
DE (1) DE60318813T2 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1804335A1 (de) * 2004-09-30 2007-07-04 Toto Ltd. Mikrostreifenantenne und hochfrequenzsensor mit einer mikrostreifenantenne
EP1925167A2 (de) * 2005-08-31 2008-05-28 Motorola, Inc. Funkkommunikationsvorrichtung mit strategisch positionierter antenne
WO2009127266A1 (en) * 2008-04-16 2009-10-22 Sony Ericsson Mobile Communications Ab Antenna assembly, printed wiring board and device
US7825860B2 (en) 2008-04-16 2010-11-02 Sony Ericsson Mobile Communications Ab Antenna assembly
EP2490297A4 (de) * 2009-11-20 2017-11-22 ZTE Corporation Endgeräteantenne mit doppelmodi und signalverarbeitungsverfahren
EP3179556A4 (de) * 2014-08-07 2018-02-07 BYD Company Limited Antennenstrahler, antenne und mobiles endgerät

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CN102263318A (zh) * 2010-05-24 2011-11-30 广达电脑股份有限公司 天线模块及具有该天线模块的电子装置
TWI536901B (zh) 2012-03-20 2016-06-01 深圳市華星光電技術有限公司 用來控制電場強度分佈之裝置
CN103515695B (zh) * 2012-06-16 2016-05-04 富士康(昆山)电脑接插件有限公司 平板天线
CN103873122B (zh) * 2012-12-11 2019-02-19 中兴通讯股份有限公司 天线信号的发送方法、装置及设备
CN104112904A (zh) * 2013-04-17 2014-10-22 中兴通讯股份有限公司 一种解耦方法及移动终端
CN104701606A (zh) * 2015-03-13 2015-06-10 西安电子科技大学 一种用于移动通信的极化分集天线
US10263319B2 (en) * 2016-03-23 2019-04-16 Mediatek Inc. Antenna with swappable radiation direction and communication device thereof
CN107293839A (zh) * 2016-03-31 2017-10-24 宇龙计算机通信科技(深圳)有限公司 圆极化天线的设计方法、圆极化天线及移动终端
CN110649368B (zh) * 2019-09-29 2021-09-28 捷开通讯(深圳)有限公司 天线组件和电子设备
CN114284695B (zh) * 2020-09-28 2023-07-07 华为技术有限公司 天线单元和通讯设备
CN118198710A (zh) * 2020-10-19 2024-06-14 华为技术有限公司 一种电子设备
CN117117470A (zh) * 2022-05-17 2023-11-24 华为技术有限公司 一种电子设备

Citations (4)

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Publication number Priority date Publication date Assignee Title
US4367474A (en) * 1980-08-05 1983-01-04 The United States Of America As Represented By The Secretary Of The Army Frequency-agile, polarization diverse microstrip antennas and frequency scanned arrays
EP0872912A2 (de) * 1997-04-18 1998-10-21 Murata Manufacturing Co., Ltd. Antenne mit zirkularer Polarization
US6369762B1 (en) * 1999-10-21 2002-04-09 Yokowo Co., Ltd. Flat antenna for circularly-polarized wave
WO2002071535A1 (en) * 2001-03-06 2002-09-12 Koninklijke Philips Electronics N.V. Antenna arrangement

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JPH0964639A (ja) * 1995-08-25 1997-03-07 Uniden Corp ダイバーシチ・アンテナ回路

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367474A (en) * 1980-08-05 1983-01-04 The United States Of America As Represented By The Secretary Of The Army Frequency-agile, polarization diverse microstrip antennas and frequency scanned arrays
EP0872912A2 (de) * 1997-04-18 1998-10-21 Murata Manufacturing Co., Ltd. Antenne mit zirkularer Polarization
US6369762B1 (en) * 1999-10-21 2002-04-09 Yokowo Co., Ltd. Flat antenna for circularly-polarized wave
WO2002071535A1 (en) * 2001-03-06 2002-09-12 Koninklijke Philips Electronics N.V. Antenna arrangement

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1804335A1 (de) * 2004-09-30 2007-07-04 Toto Ltd. Mikrostreifenantenne und hochfrequenzsensor mit einer mikrostreifenantenne
EP1804335A4 (de) * 2004-09-30 2010-04-28 Toto Ltd Mikrostreifenantenne und hochfrequenzsensor mit einer mikrostreifenantenne
US7773035B2 (en) 2004-09-30 2010-08-10 Toto Ltd. Microstrip antenna and high frequency sensor using microstrip antenna
EP1925167A2 (de) * 2005-08-31 2008-05-28 Motorola, Inc. Funkkommunikationsvorrichtung mit strategisch positionierter antenne
EP1925167A4 (de) * 2005-08-31 2008-10-08 Motorola Inc Funkkommunikationsvorrichtung mit strategisch positionierter antenne
WO2009127266A1 (en) * 2008-04-16 2009-10-22 Sony Ericsson Mobile Communications Ab Antenna assembly, printed wiring board and device
US7768463B2 (en) 2008-04-16 2010-08-03 Sony Ericsson Mobile Communications Ab Antenna assembly, printed wiring board and device
US7825860B2 (en) 2008-04-16 2010-11-02 Sony Ericsson Mobile Communications Ab Antenna assembly
EP2490297A4 (de) * 2009-11-20 2017-11-22 ZTE Corporation Endgeräteantenne mit doppelmodi und signalverarbeitungsverfahren
EP3179556A4 (de) * 2014-08-07 2018-02-07 BYD Company Limited Antennenstrahler, antenne und mobiles endgerät

Also Published As

Publication number Publication date
DE60318813D1 (de) 2008-03-13
DE60318813T2 (de) 2009-01-15
CN1816941A (zh) 2006-08-09
EP1460713B1 (de) 2008-01-23
ATE385052T1 (de) 2008-02-15
CN1816941B (zh) 2010-12-22

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