MXPA01012163A - Antena cerrada con al menos dos frecuencias de resonancia. - Google Patents

Antena cerrada con al menos dos frecuencias de resonancia.

Info

Publication number
MXPA01012163A
MXPA01012163A MXPA01012163A MXPA01012163A MXPA01012163A MX PA01012163 A MXPA01012163 A MX PA01012163A MX PA01012163 A MXPA01012163 A MX PA01012163A MX PA01012163 A MXPA01012163 A MX PA01012163A MX PA01012163 A MXPA01012163 A MX PA01012163A
Authority
MX
Mexico
Prior art keywords
elements
antenna
group
resonant frequencies
conductive paths
Prior art date
Application number
MXPA01012163A
Other languages
English (en)
Spanish (es)
Inventor
Oliver Paul Leisten
Original Assignee
Sarantel Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sarantel Ltd filed Critical Sarantel Ltd
Publication of MXPA01012163A publication Critical patent/MXPA01012163A/es

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—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
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • 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

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)
  • Burglar Alarm Systems (AREA)
  • Support Of Aerials (AREA)
  • Waveguide Aerials (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Aerials With Secondary Devices (AREA)
MXPA01012163A 1999-05-27 2000-05-24 Antena cerrada con al menos dos frecuencias de resonancia. MXPA01012163A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9912441.4A GB9912441D0 (en) 1999-05-27 1999-05-27 An antenna
PCT/GB2000/001983 WO2000074173A1 (en) 1999-05-27 2000-05-24 Loop antenna with at least two resonant frequencies

Publications (1)

Publication Number Publication Date
MXPA01012163A true MXPA01012163A (es) 2003-06-30

Family

ID=10854339

Family Applications (1)

Application Number Title Priority Date Filing Date
MXPA01012163A MXPA01012163A (es) 1999-05-27 2000-05-24 Antena cerrada con al menos dos frecuencias de resonancia.

Country Status (14)

Country Link
US (1) US6300917B1 (enExample)
EP (1) EP1196963B1 (enExample)
JP (1) JP4077197B2 (enExample)
KR (1) KR100767329B1 (enExample)
CN (2) CN101043099B (enExample)
AT (1) ATE357750T1 (enExample)
AU (1) AU769570B2 (enExample)
BR (1) BR0010954A (enExample)
CA (1) CA2373941C (enExample)
DE (1) DE60034042T2 (enExample)
ES (1) ES2283301T3 (enExample)
GB (2) GB9912441D0 (enExample)
MX (1) MXPA01012163A (enExample)
WO (1) WO2000074173A1 (enExample)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2399948B (en) 2003-03-28 2006-06-21 Sarantel Ltd A dielectrically-loaded antenna
US7372427B2 (en) * 2003-03-28 2008-05-13 Sarentel Limited Dielectrically-loaded antenna
KR100793646B1 (ko) * 2004-07-28 2008-01-11 스카이크로스 인코포레이티드 핸드셋 쿼드리파일러 나선형 안테나 기계적 구조들
TWI244237B (en) * 2004-11-12 2005-11-21 Emtac Technology Corp Quadri-filar helix antenna structure
US7439934B2 (en) * 2005-06-21 2008-10-21 Sarantel Limited Antenna and an antenna feed structure
US7342554B2 (en) * 2005-11-25 2008-03-11 Inpaq Technology Co., Ltd. Column antenna apparatus and a manufacturing method thereof
GB2437998B (en) * 2006-05-12 2009-11-11 Sarantel Ltd An antenna system
GB2441566A (en) * 2006-09-06 2008-03-12 Sarantel Ltd An antenna and its feed structure
US7554509B2 (en) * 2006-08-25 2009-06-30 Inpaq Technology Co., Ltd. Column antenna apparatus and method for manufacturing the same
GB2442998B (en) * 2006-10-20 2010-01-06 Sarantel Ltd A dielectrically-loaded antenna
GB0623774D0 (en) 2006-11-28 2007-01-10 Sarantel Ltd An Antenna Assembly Including a Dielectrically Loaded Antenna
US7394435B1 (en) * 2006-12-08 2008-07-01 Wide Sky Technology, Inc. Slot antenna
GB2444750B (en) 2006-12-14 2010-04-21 Sarantel Ltd An antenna arrangement
GB2444749B (en) * 2006-12-14 2009-11-18 Sarantel Ltd A radio communication system
GB2449837B (en) * 2006-12-20 2011-09-07 Sarantel Ltd A dielectrically-loaded antenna
GB0700276D0 (en) 2007-01-08 2007-02-14 Sarantel Ltd A dielectrically-loaded antenna
US8089421B2 (en) * 2008-01-08 2012-01-03 Sarantel Limited Dielectrically loaded antenna
US8799861B2 (en) * 2008-01-30 2014-08-05 Intuit Inc. Performance-testing a system with functional-test software and a transformation-accelerator
JP2012520594A (ja) * 2009-03-12 2012-09-06 サランテル リミテッド 誘電体装荷アンテナ
GB0904307D0 (en) * 2009-03-12 2009-04-22 Sarantel Ltd A dielectrically-loaded antenna
US8106846B2 (en) 2009-05-01 2012-01-31 Applied Wireless Identifications Group, Inc. Compact circular polarized antenna
US8456375B2 (en) * 2009-05-05 2013-06-04 Sarantel Limited Multifilar antenna
WO2011001006A1 (en) * 2009-07-02 2011-01-06 Elektrobit Wireless Communications Oy Multiresonance helix antenna
US8618998B2 (en) 2009-07-21 2013-12-31 Applied Wireless Identifications Group, Inc. Compact circular polarized antenna with cavity for additional devices
US20110215986A1 (en) * 2010-03-04 2011-09-08 Sarantel Limited Antenna Assembly
GB201108016D0 (en) 2011-05-13 2011-06-29 Sarantel Ltd An antenna and a method of manufacture thereof
FR3008550B1 (fr) * 2013-07-15 2015-08-21 Inst Mines Telecom Telecom Bretagne Antenne de type bouchon et structure antennaire et ensemble antennaire associes
US9837709B2 (en) * 2015-04-09 2017-12-05 Topcon Positioning Systems, Inc. Broadband helical antenna with cutoff pattern
CN105226388B (zh) * 2015-09-25 2021-11-16 陕西永诺信息科技有限公司 一种全频段导航天线
US9912039B2 (en) * 2015-10-23 2018-03-06 Te Connectivity Corporation Wireless communication device and antenna assembly
US10263335B2 (en) * 2017-09-11 2019-04-16 Apple Inc. Electronic device antennas having shared structures for near-field communications and non-near field communications
JP6914598B2 (ja) * 2017-10-03 2021-08-04 日本アンテナ株式会社 円偏波アンテナおよびダイバーシティ通信システム
US10700428B2 (en) 2018-02-06 2020-06-30 Harris Solutions NY, Inc. Dual band octafilar antenna
CN113131181B (zh) * 2019-12-30 2023-11-21 成都鼎桥通信技术有限公司 终端设备
CN116435785B (zh) * 2023-06-08 2023-09-08 广东工业大学 全向双圆极化螺旋天线及通信设备
CN116979246B (zh) * 2023-09-20 2023-12-19 浪潮(山东)计算机科技有限公司 一种通信天线及通信设备
WO2025109946A1 (ja) * 2023-11-24 2025-05-30 株式会社ヨコオ アンテナユニット及びアンテナ装置

Family Cites Families (90)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2575377A (en) 1945-11-13 1951-11-20 Robert J Wohl Short wave antenna
US2763003A (en) 1953-07-01 1956-09-11 Edward F Harris Helical antenna construction
GB762415A (en) 1954-06-17 1956-11-28 Emi Ltd Improvements in or relating to aerials
GB840850A (en) 1955-07-19 1960-07-13 Telefunken Gmbh Improvements relating to high frequency aerial-arrangements
US3633210A (en) 1967-05-26 1972-01-04 Philco Ford Corp Unbalanced conical spiral antenna
CH499888A (fr) 1967-12-15 1970-11-30 Onera (Off Nat Aerospatiale) Antenne à un seul conducteur enroulé hélicoïdalement de dimensions réduites, et procédé pour sa fabrication
US3611198A (en) 1970-05-04 1971-10-05 Zenith Radio Corp Frequency-selective coupling circuit for all-channel television antenna having uhf/vhf crossover network within uhf tuner
US3906509A (en) 1974-03-11 1975-09-16 Raymond H Duhamel Circularly polarized helix and spiral antennas
US3940772A (en) 1974-11-08 1976-02-24 Rca Corporation Circularly polarized, broadside firing tetrahelical antenna
US4008479A (en) 1975-11-03 1977-02-15 Chu Associates, Inc. Dual-frequency circularly polarized spiral antenna for satellite navigation
US4008478A (en) 1975-12-31 1977-02-15 The United States Of America As Represented By The Secretary Of The Army Rifle barrel serving as radio antenna
US4160979A (en) 1976-06-21 1979-07-10 National Research Development Corporation Helical radio antennae
US4114164A (en) 1976-12-17 1978-09-12 Transco Products, Inc. Broadband spiral antenna
US4148030A (en) 1977-06-13 1979-04-03 Rca Corporation Helical antennas
US4168479A (en) 1977-10-25 1979-09-18 The United States Of America As Represented By The Secretary Of The Navy Millimeter wave MIC diplexer
US4329689A (en) 1978-10-10 1982-05-11 The Boeing Company Microstrip antenna structure having stacked microstrip elements
US4204212A (en) 1978-12-06 1980-05-20 The United States Of America As Represented By The Secretary Of The Army Conformal spiral antenna
US4323900A (en) 1979-10-01 1982-04-06 The United States Of America As Represented By The Secretary Of The Navy Omnidirectional microstrip antenna
US4349824A (en) 1980-10-01 1982-09-14 The United States Of America As Represented By The Secretary Of The Navy Around-a-mast quadrifilar microstrip antenna
FR2492540A1 (fr) 1980-10-17 1982-04-23 Schlumberger Prospection Dispositif pour diagraphie electromagnetique dans les forages
DE3217437A1 (de) 1982-03-25 1983-11-10 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Mikrowellen-richtantenne aus einer dielektrischen leitung
US4442438A (en) 1982-03-29 1984-04-10 Motorola, Inc. Helical antenna structure capable of resonating at two different frequencies
US4608572A (en) 1982-12-10 1986-08-26 The Boeing Company Broad-band antenna structure having frequency-independent, low-loss ground plane
US4608574A (en) 1984-05-16 1986-08-26 The United States Of America As Represented By The Secretary Of The Air Force Backfire bifilar helix antenna
FR2570546B1 (fr) 1984-09-17 1987-10-23 Europ Agence Spatiale Antenne multifilaire helicoidale pour la transmission simultanee de plusieurs signaux d'emission et de reception vhf/uhf
US4658262A (en) 1985-02-19 1987-04-14 Duhamel Raymond H Dual polarized sinuous antennas
US4697192A (en) 1985-04-16 1987-09-29 Texas Instruments Incorporated Two arm planar/conical/helix antenna
US4706049A (en) 1985-10-03 1987-11-10 Motorola, Inc. Dual adjacent directional filters/combiners
FR2597267B1 (fr) 1986-04-15 1988-07-22 Alcatel Espace Antenne a haute efficacite
JPS6367903A (ja) 1986-09-10 1988-03-26 Aisin Seiki Co Ltd アンテナ装置
GB8624807D0 (en) 1986-10-16 1986-11-19 C S Antennas Ltd Antenna construction
SU1483511A1 (ru) 1986-12-30 1989-05-30 Организация П/Я В-8942 Спиральна антенна
US4862184A (en) 1987-02-06 1989-08-29 George Ploussios Method and construction of helical antenna
US5023866A (en) 1987-02-27 1991-06-11 Motorola, Inc. Duplexer filter having harmonic rejection to control flyback
GB2202380A (en) 1987-03-20 1988-09-21 Philips Electronic Associated Helical antenna
US5081469A (en) 1987-07-16 1992-01-14 Sensormatic Electronics Corporation Enhanced bandwidth helical antenna
US5258728A (en) 1987-09-30 1993-11-02 Fujitsu Ten Limited Antenna circuit for a multi-band antenna
US5099249A (en) 1987-10-13 1992-03-24 Seavey Engineering Associates, Inc. Microstrip antenna for vehicular satellite communications
FR2624656B1 (fr) 1987-12-10 1990-05-18 Centre Nat Etd Spatiales Antenne de type helice et son procede de realisation
JPH01227530A (ja) 1988-03-07 1989-09-11 Kokusai Electric Co Ltd 分波器
JPH0659009B2 (ja) 1988-03-10 1994-08-03 株式会社豊田中央研究所 移動体用アンテナ
US4902992A (en) 1988-03-29 1990-02-20 The United States Of America As Represented By The Secretary Of The Navy Millimeter-wave multiplexers
US4940992A (en) 1988-04-11 1990-07-10 Nguyen Tuan K Balanced low profile hybrid antenna
US5170493A (en) 1988-07-25 1992-12-08 Iimorrow, Inc. Combined low frequency receive and high frequency transceive antenna system and method
US5019829A (en) 1989-02-08 1991-05-28 Heckman Douglas E Plug-in package for microwave integrated circuit having cover-mounted antenna
US4980694A (en) 1989-04-14 1990-12-25 Goldstar Products Company, Limited Portable communication apparatus with folded-slot edge-congruent antenna
FR2648626B1 (fr) 1989-06-20 1991-08-23 Alcatel Espace Element rayonnant diplexant
JPH03123203A (ja) 1989-10-06 1991-05-27 Harada Ind Co Ltd 自動車用三波共用アンテナ
FR2654554B1 (fr) 1989-11-10 1992-07-31 France Etat Antenne en helice, quadrifilaire, resonnante bicouche.
JP2568281B2 (ja) 1989-11-17 1996-12-25 原田工業株式会社 自動車用三波共用アンテナ
DE69028919T2 (de) 1990-01-08 1997-02-13 Toyo Communication Equip Wendelantenne mit geteilter vierdrahtwicklung und verfahren zu deren herstellung
JP2586675B2 (ja) 1990-02-27 1997-03-05 国際電信電話株式会社 ４線巻ヘリカルアンテナ
JP2823644B2 (ja) 1990-03-26 1998-11-11 日本電信電話株式会社 ヘリカルアンテナ
GB2246910B (en) 1990-08-02 1994-12-14 Polytechnic Electronics Plc A radio frequency antenna
GB2248344B (en) 1990-09-25 1994-07-20 Secr Defence Three-dimensional patch antenna array
US5198831A (en) 1990-09-26 1993-03-30 501 Pronav International, Inc. Personal positioning satellite navigator with printed quadrifilar helical antenna
JP3185233B2 (ja) 1991-03-18 2001-07-09 株式会社日立製作所 携帯無線機用小型アンテナ
FI89646C (fi) 1991-03-25 1993-10-25 Nokia Mobile Phones Ltd Antennstav och foerfarande foer dess framstaellning
FR2674689B1 (fr) 1991-03-29 1993-05-21 Ct Reg Innovat Transfert Tech Antenne cylindrique imprimee omnidirectionnelle et repondeur radar maritime utilisant de telles antennes.
US5346300A (en) 1991-07-05 1994-09-13 Sharp Kabushiki Kaisha Back fire helical antenna
US5349365A (en) 1991-10-21 1994-09-20 Ow Steven G Quadrifilar helix antenna
CA2061743C (en) 1992-02-24 1996-05-14 Peter Charles Strickland End loaded helix antenna
US5281934A (en) 1992-04-09 1994-01-25 Trw Inc. Common input junction, multioctave printed microwave multiplexer
US5612707A (en) 1992-04-24 1997-03-18 Industrial Research Limited Steerable beam helix antenna
JP3209569B2 (ja) 1992-05-11 2001-09-17 原田工業株式会社 車両用三波共用アンテナ
JP3317521B2 (ja) 1992-07-06 2002-08-26 原田工業株式会社 衛星通信用ヘリカルアンテナの製造方法
US5345248A (en) 1992-07-22 1994-09-06 Space Systems/Loral, Inc. Staggered helical array antenna
EP0588465A1 (en) 1992-09-11 1994-03-23 Ngk Insulators, Ltd. Ceramic dielectric for antennas
IT1255602B (it) 1992-09-18 1995-11-09 Alcatel Italia Apparecchio ricetrasmettitore portatile a bassa irradiazione dell'utente, utilizzante una antenna avente diagramma di irradiazione asimmetrico.
JP2809365B2 (ja) 1992-09-28 1998-10-08 エヌ・ティ・ティ移動通信網株式会社 携帯無線機
US5748154A (en) 1992-09-30 1998-05-05 Fujitsu Limited Miniature antenna for portable radio communication equipment
DE4334439A1 (de) 1993-10-09 1995-04-13 Philips Patentverwaltung Funkgerät mit einer Antenne
JP3570692B2 (ja) 1994-01-18 2004-09-29 ローム株式会社 不揮発性メモリ
JPH07249973A (ja) 1994-03-14 1995-09-26 Toshiba Corp 電子機器
US5479180A (en) 1994-03-23 1995-12-26 The United States Of America As Represented By The Secretary Of The Army High power ultra broadband antenna
US5450093A (en) 1994-04-20 1995-09-12 The United States Of America As Represented By The Secretary Of The Navy Center-fed multifilar helix antenna
GB2292257B (en) 1994-06-22 1999-04-07 Sidney John Branson An antenna
GB2326532B (en) 1994-08-25 1999-02-24 Symmetricom Inc An antenna
GB9417450D0 (en) * 1994-08-25 1994-10-19 Symmetricom Inc An antenna
US5541613A (en) 1994-11-03 1996-07-30 Hughes Aircraft Company, Hughes Electronics Efficient broadband antenna system using photonic bandgap crystals
US5548255A (en) 1995-06-23 1996-08-20 Microphase Corporation Compact diplexer connection circuit
JP3166589B2 (ja) 1995-12-06 2001-05-14 株式会社村田製作所 チップアンテナ
GB9601250D0 (en) 1996-01-23 1996-03-27 Symmetricom Inc An antenna
ATE242550T1 (de) * 1996-01-23 2003-06-15 Sarantel Ltd Antenne für frequenzen über 200 mhz
GB9603914D0 (en) 1996-02-23 1996-04-24 Symmetricom Inc An antenna
GB9606593D0 (en) 1996-03-29 1996-06-05 Symmetricom Inc An antenna system
AU4485997A (en) * 1996-09-10 1998-04-02 Coors Ceramics Company Dielectric-loaded antenna with recessed antenna elements
GB2317057A (en) 1996-11-01 1998-03-11 Symmetricom Inc Dielectric-loaded antenna
US6184845B1 (en) 1996-11-27 2001-02-06 Symmetricom, Inc. Dielectric-loaded antenna
US6384798B1 (en) * 1997-09-24 2002-05-07 Magellan Corporation Quadrifilar antenna

Also Published As

Publication number Publication date
CA2373941A1 (en) 2000-12-07
CA2373941C (en) 2008-01-22
CN101043099B (zh) 2012-06-27
CN1280946C (zh) 2006-10-18
DE60034042D1 (de) 2007-05-03
CN1354897A (zh) 2002-06-19
JP2003501852A (ja) 2003-01-14
CN101043099A (zh) 2007-09-26
GB9912441D0 (en) 1999-07-28
KR20020012236A (ko) 2002-02-15
ES2283301T3 (es) 2007-11-01
AU769570B2 (en) 2004-01-29
JP4077197B2 (ja) 2008-04-16
WO2000074173A1 (en) 2000-12-07
DE60034042T2 (de) 2007-12-06
AU5087000A (en) 2000-12-18
US6300917B1 (en) 2001-10-09
ATE357750T1 (de) 2007-04-15
GB2351850A (en) 2001-01-10
KR100767329B1 (ko) 2007-10-17
EP1196963B1 (en) 2007-03-21
GB2351850B (en) 2003-08-27
BR0010954A (pt) 2002-03-26
EP1196963A1 (en) 2002-04-17
GB0012658D0 (en) 2000-07-12

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