EP1098391A2 - Antenne doublet replié - Google Patents

Antenne doublet replié Download PDF

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Publication number
EP1098391A2
EP1098391A2 EP00123425A EP00123425A EP1098391A2 EP 1098391 A2 EP1098391 A2 EP 1098391A2 EP 00123425 A EP00123425 A EP 00123425A EP 00123425 A EP00123425 A EP 00123425A EP 1098391 A2 EP1098391 A2 EP 1098391A2
Authority
EP
European Patent Office
Prior art keywords
section
ground plane
conductor
dipole antenna
folded dipole
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
EP00123425A
Other languages
German (de)
English (en)
Other versions
EP1098391B1 (fr
EP1098391A3 (fr
Inventor
Martin L. Zimmerman
John S. Wilson
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.)
Commscope Technologies AG
Commscope Technologies LLC
Original Assignee
Andrew AG
Andrew LLC
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
Priority claimed from US09/432,524 external-priority patent/US6285336B1/en
Priority claimed from US09/479,489 external-priority patent/US6317099B1/en
Application filed by Andrew AG, Andrew LLC filed Critical Andrew AG
Priority to DK00123425T priority Critical patent/DK1098391T3/da
Publication of EP1098391A2 publication Critical patent/EP1098391A2/fr
Publication of EP1098391A3 publication Critical patent/EP1098391A3/fr
Application granted granted Critical
Publication of EP1098391B1 publication Critical patent/EP1098391B1/fr
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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/062—Two dimensional planar arrays using dipole aerials
    • 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
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/108—Combination of a dipole with a plane reflecting surface
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength

Definitions

  • the present invention relates generally to antennas. More particularly, it concerns a folded dipole antenna for use in wireless telecommunications systems.
  • Base station antennas used in wireless telecommunication systems have the capability to transmit and receive electromagnetic signals. Received signals are processed by a receiver at the base station and fed into a communications network. Transmitted signals are transmitted at different frequencies than the received signals.
  • GSM Global System for Mobile
  • PCS Personal Communication System
  • PCN Personal Communication Network
  • UMTS Universal Mobile Telecommunications System
  • the present invention addresses the problems associated with prior antennas by providing a novel folded dipole antenna including a conductor forming one or more integral radiating sections.
  • This design exhibits wide impedance bandwidth, is inexpensive to manufacture, and can be incorporated into existing single-polarization antenna designs.
  • a folded dipole antenna for transmitting and receiving electromagnetic signals includes a ground plane and a conductor extending adjacent the ground plane and spaced therefrom by a first dielectric.
  • the conductor includes an open-ended transmission line shorting stub, a radiator input section, at least one radiating section integrally formed with the radiator input section, and a feed section.
  • the radiating section includes first and second ends, a fed dipole and a passive dipole.
  • the fed dipole is connected to the radiator input section.
  • the passive dipole is disposed in spaced relation to the fed dipole to form a gap.
  • the passive dipole is shorted to the fed dipole at the first and second ends.
  • the present invention is useful in wireless, broadcast, military and other such communication systems.
  • One embodiment of the present invention operates across various frequency bands, such as the North American Cellular band of frequencies of 824-896 MHz, the North American Trunking System band of frequencies of 806-869 MHz, the Global System for Mobile (GSM) band of frequencies of 870-960 MHz.
  • Another embodiment of the invention operates across several different wireless bands, such as the Personal Communication System (PCS) band of frequencies of 1850-1990 MHz, the Personal Communication Network (PCN) band of frequencies of 1710-1880 MHz, and the Universal Mobile Telecommunications System (UMTS) band of frequencies of 1885-2170 MHz.
  • PCS Personal Communication System
  • PCN Personal Communication Network
  • UMTS Universal Mobile Telecommunications System
  • wireless telephone users transmit electromagnetic signals to a base station tower that includes a plurality of antennas which receive the signals transmitted by the wireless telephone users.
  • the present invention can also be used in all types of telecommunications systems.
  • the antenna illustrated in FIGs. 1a-4b is a folded dipole antenna 10 for transmitting and receiving electromagnetic signals.
  • the antenna 10 includes a ground plane 12 and a conductor 14 formed from a single sheet of conductive material.
  • the conductor 14 consists of three sections, a feed section 20, a radiator input section 40, and a radiating portion including radiating sections 21 and/or 22.
  • the feed section 20 extends adjacent the ground plane 12 and is spaced therefrom by a dielectric, such as air, foam, etc ., as shown in FIG. 1b.
  • the radiating sections 21 and 22 are spaced from the surface or edge of the ground plane 12 in order to provide an antenna capable of wide bandwidth operation that still has a compact size.
  • a radiator input section 40 consists of two conductor sections 41 and 42 separated by a gap 29.
  • the conductor section 41 connects one part of the radiating section 22 to the feed line 20 and the conductor section 42 connects another part of the radiating section 22 to the ground plane 12.
  • the radiator input section 40 has an intrinsic impedance that is adjusted to match the radiating section 22 to the feed section 20. This impedance is adjusted by varying the width of the conductor sections 41, 42 and the gap 29.
  • the antenna 10 includes two radiating sections 21 and 22.
  • the conductor 14 is mechanically and electrically connected to the ground plane 12 at two locations 16 and 18.
  • the radiating sections 21, 22 are supported at a distance d above the ground plane 12.
  • the distance d 1.22".
  • the conductor 14 is bent at bends 15a and 15b such that the feed section 20 is supported by and displaced from the ground plane 12, as illustrated schematically in FIG. 1b.
  • the feed section 20 is generally parallel to the ground plane 12.
  • the feed section 20 includes an RF input section 38 that is adapted to electrically connect to a transmission line.
  • the transmission line is generally electrically connected to an RF device such as a transmitter or a receiver.
  • the RF input section 38 directly connects to the RF device.
  • Radiating section 22 includes a fed dipole 24 and a passive dipole 26.
  • the fed dipole 24 comprises a first quarter-wavelength monopole 28 and a second quarter-wavelength monopole 30.
  • the first quarter-wavelength monopole 28 is connected to one end of the conductor section 41.
  • the other end of the conductor section 41 is connected to the feed section 20.
  • the second quarter-wavelength monopole 30 is connected to one end of the conductor section 42, and the other end of conductor section 42 is connected to the ground plane 12 at location 16.
  • the conductor section 42 can be connected to the ground plane 12 by any suitable fastening device such as a nut and bolt, a screw, a rivet, or any suitable fastening method including soldering, welding, brazing, and cold forming.
  • a suitable connection provides both electrical and mechanical connections between the conductor 14 and ground plane 12.
  • the antenna 10 is protected from overvoltage and overcurrent conditions caused by transients such as lightning.
  • One method of forming a good electrical and mechanical connection is the cold forming process developed by Tox Pressotechnik GmbH of Weingarten, Germany (hereinafter "the cold forming process").
  • the cold forming process deforms and compresses one metal surface into another metal surface to form a Tox button.
  • the cold forming process uses pressure to lock the two metal surfaces together.
  • the resulting Tox buttons at locations 16 and 18 provide structural support to the radiating sections 21, 22 and provide an electrical connection to the ground plane 12. Attaching the conductor 14 to the ground plane 12 by the cold forming process minimizes the intermodulation distortion (IMD) of the antenna 10. Certain other types of electrical connections such as welding will also minimize the IMD of the antenna 10.
  • IMD intermodulation distortion
  • the gap 32 forms a first half-wavelength dipole (passive dipole 26) on one side of the gap 32 and a second half-wavelength dipole (fed dipole 24) on the other side of the gap 32.
  • the centrally-located gap 29 separates the fed dipole 24 into the first quarter-wavelength monopole 28 and the second quarter-wavelength monopole 30.
  • Portions of the conductor 14 at opposing ends 34 and 36 of the gap 32 electrically connect the fed dipole 24 with the passive dipole 26.
  • the gap 29 causes the conductor sections 41 and 42 to form an edge-coupled stripline transmission line. Since this transmission line is balanced, it efficiently transfers EM power from the feed section 20 to the radiating section 22.
  • the ground plane 12 and the feed section 20 are generally orthogonal to the radiating sections 21, 22.
  • FIG. 1c there is shown a top view of the conductor 14 before it is bent into the folded dipole antenna similar to the antenna shown in FIG. 1a.
  • a hole 42 is provided in the RF input section 38 to aid in connecting the RF input section 38 to a conductor of a transmission line or RF device.
  • One or more holes 44 are provided to facilitate attachment of one or more dielectric supports between the feed section 20 and the ground plane 12.
  • the dielectric supports may include spacers, nuts and bolts with dielectric washers, screws with dielectric washers, etc .
  • the conductor 14 is bent to form radiating sections 21', 22'.
  • the conductor 14 is bent such that the passive dipoles 26 of each radiating section 21' and 22' are generally perpendicular to the respective conductor sections 40 and are generally parallel to the ground plane 12.
  • radiating sections 21", 22" are bent in opposite directions such that the passive dipoles 26 of each radiating section 21" and 22" are disposed about 180 degrees from each other, are generally perpendicular to the respective conductor sections 40, and are each generally parallel to the ground plane 12.
  • the passive dipole 26 is disposed parallel to and spaced from the fed dipole 24 to form a gap 32.
  • the passive dipole 26 is shorted to the fed dipole 24 at opposing ends 34 and 36 of the gap 32.
  • the gap 32 has a length L and a width W, where the length L is greater than the width W.
  • a ground plane 112 which comprises four sections 114, 116, 117, and 118.
  • Sections 114 and 116 are generally co-planar horizontal sections while sections 117 and 118 are generally opposing vertical walls.
  • the feed section 120 is disposed between the two generally vertical walls 117, 118.
  • the walls 117, 118 of the ground plane 112 are generally parallel to the feed section 120.
  • the feed section 120 and the walls 117, 118 form a triplate microstrip transmission line.
  • the feed section 120 is spaced from the walls 117, 118 by a dielectric such as air, foam, etc .
  • the two sections 114 and 116 are each generally orthogonal to the radiating sections 121, 122.
  • a single ground plane 212 is provided which is generally vertical.
  • a single feed section 20 and the radiating sections 121, 122 are thus all generally parallel to the ground plane 212.
  • the conductor 114 or 214 is generally vertical and planar ( i . e ., is not bent along most of its length), although the conductor 114 or 214 shown in FIGs. 2 and 3 is bent slightly for attachment to locations 116, 118 on the ground planes 112, or locations 216, 218 on the ground plane 212.
  • the conductor 114 or 214 could be planar along its entire length, thereby enabling the conductor to be made from a non-bendable dielectric substrate microstrip which is attached directly to the ground planes 112, 212, respectively, by, e . g ., bonding.
  • radiating sections 321a, 322a are supported on the ground plane 312 and are generally orthogonal thereto.
  • a conductor 314a is bent at bends 315a and 315b such that the feed section 320a is supported by and displaced from the ground plane 312.
  • the ends 334a, 336a of the radiating sections 321a, 322a are bent downward towards the ground plane 312. This configuration minimizes the size of the resulting antenna 10.
  • bending the radiating sections 321a, 322a increases the E-plane Half Power Beamwidth (HPBW) of the far-field pattern of the resulting antenna. This embodiment is particularly attractive for producing nearly identical E-plane and H-plane co-polarization patterns in the far-field.
  • HPBW E-plane Half Power Beamwidth
  • one or more such radiating sections may be used for slant-45 degree radiation, in which the radiating sections are arranged in a vertically disposed row, with each radiating section rotated so as to have its co-polarization at a 45 degree angle with respect to the center axis of the vertical row.
  • the radiating sections are arranged in a vertically disposed row, with each radiating section rotated so as to have its co-polarization at a 45 degree angle with respect to the center axis of the vertical row.
  • the downwardly bent radiation section embodiment when patterns are cut in the horizontal plane for the vertical and horizontal polarizations, the patterns will be very similar over a broad range of observation angles.
  • FIG. 4b illustrates a top view of the conductor 14a before it is bent into the folded dipole antenna 10 of FIG. 4a.
  • a passive dipole 326a is disposed in spaced relation to a fed dipole 324a to form a gap 332a.
  • the passive dipole 326a is shorted to the fed dipole 324a at the ends 334a and 336a.
  • the gap 332a forms a first half-wavelength dipole (passive dipole 326a) on one side of the gap 332a and a second half-wavelength dipole (fed dipole 324a) on the other side of the gap 332a.
  • Fed dipole 24a includes a centrally-located gap 329a which forms the first quarter-wavelength monopole 328a and the second quarter-wavelength monopole 330a.
  • the dipole length L is about 6.52
  • the dipole width W is about 0.48.
  • the innermost section of the fed dipole 324a is a distance d from the top of the ground plane 312, where the distance d is about 2.89".
  • the conductor section 42 terminates in an open-ended transmission line shorting stub 50 that is not electrically connected to the ground plane 12. Rather, the stub 50 is supported above the ground plane 12 by a dielectric spacer 52 which is, for example, bonded to both the stub 50 and the ground plane 12.
  • FIG. 5b schematically illustrates a side view of a portion of the antenna 10, including one of the dielectric spacers 52.
  • the stub 50 may be secured to the ground plane 12 by a dielectric fastener that extends through the stub 50 and the ground plane 12 at locations 16, as shown in FIGs. 5a and 5b.
  • the length of the stub 50 is a quarter wavelength at the operating frequency of the antenna. Since the end of the stub 50 forms an open-circuit, there will appear to be an electrical short to ground at the end of the conductor section 42 when the antenna is excited at its operating frequency. This causes the antenna 10 to operate in the same manner as if the conductor section 42 were electrically connected to the ground plane 12. With this arrangement, there are no electrical connections to ground in the radiating element structure. DC grounding for the entire antenna array is provided by electrically connecting one end of a quarter-wavelength shorted transmission line 54 (FIG. 6) to the feed network 20 and the ground plane 12.
  • this open-ended-stub embodiment is that the number of electrical connections between the antenna and the ground plane is reduced from one connection per radiating section to one connection per antenna array. This embodiment substantially reduces manufacturing time, reduces the number of parts required for assembly and reduces the cost of the resulting antenna. These advantages are considerable where the antenna 10 contains a large number of radiating sections.
  • the open-ended stub described above may be used in any of the embodiments illustrated in FIGs. 1a-4b.
  • FIG. 6 shows still another embodiment similar to FIG. 2 but with the end of a conductor section 142 including an open-ended stripline stub 150.
  • the stub 150 is spaced from the ground plane 112 by dielectric spacers similar to the spacers 52 described above in relation to FIG. 5a.
  • DC grounding for the entire antenna array may be provided by electrically connecting a quarter-wavelength transmission line 54 between the feed section 120 and the ground plane 112.
  • FIG. 7 shows another embodiment where the antenna 10 is supported by dielectric spacers 252.
  • the end of conductor section 242 includes an open-ended stripline stub 250 spaced from the ground plane 212 by the spacers 252, similar to the spacers 52 described above in relation to FIG. 5a.
  • DC grounding for the entire antenna array may be provided by electrically connecting a quarter-wavelength transmission line between the feed section and the ground plane.
  • the antenna 10 would operate with as few as one radiating section or with multiple radiating sections.
  • the folded dipole antenna 10 of the present invention provides one or more radiating sections that are integrally formed from the conductor 14. Each radiating section is an integrated part of the conductor 14. Thus, there is no need for separate radiating elements ( i . e ., radiating elements that are not an integral part of the conductor 14) or fasteners to connect the separate radiating elements to the conductor 14 and/or the ground plane 12.
  • the entire conductor 14 of the antenna 10 can be manufactured from a single piece of conductive material such as, for example, a metal sheet comprised of aluminum, copper, brass or alloys thereof. This improves the reliability of the antenna 10, reduces the cost of manufacturing the antenna 10 and increases the rate at which the antenna 10 can be manufactured.
  • the one piece construction of the bendable conductor embodiment is superior to prior antennas using dielectric substrate microstrips because such microstrips can not be bent to create the radiating sections shown, for example, in FIGs. 1a-e and 4a-b.
  • Each radiating section such as the radiating sections 21, 22 in the antenna of FIG. 1a, is fed by a pair of conductor sections, such as the conductor sections 41 and 42 in the antenna of FIG. 1a, which form a balanced edge-coupled stripline transmission line. Since this transmission line is balanced, it is not necessary to provide a balun.
  • the result is an antenna with very wide impedance bandwidth ( e . g ., 24%).
  • the impedance bandwidth is calculated by subtracting the highest frequency from the lowest frequency that the antenna can accommodate and dividing by the center frequency of the antenna.
  • the antenna operates in the PCS, PCN and UMTS frequency bands.
  • the antenna 10 displays a stable far-field pattern across the impedance bandwidth.
  • the antenna 10 is a 90 degree azimuthal, half power beam width (HPBW) antenna, i . e ., the antenna achieves a 3 dB beamwidth of 90 degrees.
  • HPBW half power beam width
  • To produce an antenna with this HPBW requires a ground plane with sidewalls. The height of the sidewalls is 0.5" and the width between the sidewalls is 6.1". The ground plane in this embodiment is aluminum having a thickness of 0.06".
  • the antenna 10 is a 65 degree azimuthal HPBW antenna, i .
  • the antenna achieves a 3 dB beamwidth of 65 degrees.
  • To produce an antenna with this HPBW also requires a ground plane with sidewalls.
  • the height of the sidewalls is 1.4" and the width between the sidewalls is 6.1".
  • the ground plane in this embodiment is also aluminum having a thickness of 0.06".
  • the antenna 10 can be integrated into existing single-polarization antennas in order to reduce costs and increase the impedance bandwidth of these existing antennas to cover the cellular, GSM, PCS, PCN, and UMTS frequency bands.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP20000123425 1999-11-03 2000-11-02 Antenne doublet replié Expired - Lifetime EP1098391B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK00123425T DK1098391T3 (da) 1999-11-03 2000-11-02 Foldet dipolantenne

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US479489 1990-02-13
US432524 1999-11-03
US09/432,524 US6285336B1 (en) 1999-11-03 1999-11-03 Folded dipole antenna
US09/479,489 US6317099B1 (en) 2000-01-10 2000-01-10 Folded dipole antenna

Publications (3)

Publication Number Publication Date
EP1098391A2 true EP1098391A2 (fr) 2001-05-09
EP1098391A3 EP1098391A3 (fr) 2003-05-14
EP1098391B1 EP1098391B1 (fr) 2005-01-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000123425 Expired - Lifetime EP1098391B1 (fr) 1999-11-03 2000-11-02 Antenne doublet replié

Country Status (7)

Country Link
EP (1) EP1098391B1 (fr)
CN (1) CN1169387C (fr)
AU (1) AU778969B2 (fr)
BR (1) BR0005243A (fr)
DE (1) DE60017674T2 (fr)
DK (1) DK1098391T3 (fr)
MX (1) MXPA00010804A (fr)

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EP1555720A1 (fr) * 2004-01-13 2005-07-20 Kabushiki Kaisha Toshiba Antenne dipôle et dispositif de radio communication comprenant celle-ci
EP1679763A3 (fr) * 2004-12-28 2006-08-16 DX Antenna Co., Ltd. Antenne
WO2006109184A1 (fr) 2005-04-15 2006-10-19 Nokia Corporation Antenne dotee d'une pluralite de frequences de resonance
WO2008055526A1 (fr) * 2006-11-09 2008-05-15 Tes Electronic Solutions Gmbh Dispositif et système d'antenne et procédé de fonctionnement
EP1997186A2 (fr) * 2006-03-03 2008-12-03 Powerwave Technologies, Inc. Antenne verticale unique polarisée haut débit pour station de base
US7990329B2 (en) 2007-03-08 2011-08-02 Powerwave Technologies Inc. Dual staggered vertically polarized variable azimuth beamwidth antenna for wireless network
WO2012045847A1 (fr) * 2010-10-07 2012-04-12 Tdf Antenne de grande dimension à ondes de surface et à large bande
US8330668B2 (en) 2007-04-06 2012-12-11 Powerwave Technologies, Inc. Dual stagger off settable azimuth beam width controlled antenna for wireless network
US8643559B2 (en) 2007-06-13 2014-02-04 P-Wave Holdings, Llc Triple stagger offsetable azimuth beam width controlled antenna for wireless network
CN103700923A (zh) * 2013-11-27 2014-04-02 西安电子科技大学 一种高增益双频基站天线
US10079431B2 (en) 2008-01-28 2018-09-18 Intel Corporation Antenna array having mechanically-adjustable radiator elements
CN109950682A (zh) * 2017-10-27 2019-06-28 联发科技股份有限公司 天线封装和通信装置
CN113497327A (zh) * 2020-04-02 2021-10-12 江苏航天大为科技股份有限公司 一种便于信号发射和接收的天线安装装置
CN114784513A (zh) * 2022-06-17 2022-07-22 微网优联科技(成都)有限公司 一种双频高增益单极子天线

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JP4437475B2 (ja) * 2006-01-31 2010-03-24 富士通株式会社 折り返しダイポールアンテナ及びこれを使用したタグ
FI120522B (fi) * 2006-03-02 2009-11-13 Filtronic Comtek Oy Uudenlainen antennirakenne ja menetelmä sen valmistamiseksi
CN101345338B (zh) * 2007-07-11 2012-05-30 光宝科技股份有限公司 电子装置及其短路偶极天线
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CN102142611B (zh) * 2010-02-01 2014-02-12 深圳富泰宏精密工业有限公司 偶极天线
CN102263319B (zh) * 2010-05-28 2014-08-13 光宝电子(广州)有限公司 偶极天线及具有偶极天线的电子装置
ES1291234Y (es) * 2014-04-11 2022-08-30 Commscope Technologies Llc Antena multibanda adaptada para eliminar resonancias
US11038274B2 (en) * 2018-01-23 2021-06-15 Samsung Electro-Mechanics Co., Ltd. Antenna apparatus and antenna module
DE112019004920T5 (de) 2018-11-12 2021-06-17 Nec Platforms, Ltd. Antenne, drahtloskommunikationseinrichtung und antennenbildungsverfahren

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US2978703A (en) * 1960-03-08 1961-04-04 Avco Corp Folded dipole antenna fabricated from a single metallic sheet
US3167775A (en) * 1959-10-07 1965-01-26 Rudolf Guertler Multi-band antenna formed of closely spaced folded dipoles of increasing length
FR2547957A1 (fr) * 1983-06-22 1984-12-28 Portenseigne Antenne de reception de signaux radioelectriques et systeme de reception de signaux radioelectriques comprenant une telle antenne
EP0566522A1 (fr) * 1992-04-15 1993-10-20 Celwave R.F. A/S Système d'antenne et méthode de fabrication dudit système

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US3167775A (en) * 1959-10-07 1965-01-26 Rudolf Guertler Multi-band antenna formed of closely spaced folded dipoles of increasing length
US2978703A (en) * 1960-03-08 1961-04-04 Avco Corp Folded dipole antenna fabricated from a single metallic sheet
FR2547957A1 (fr) * 1983-06-22 1984-12-28 Portenseigne Antenne de reception de signaux radioelectriques et systeme de reception de signaux radioelectriques comprenant une telle antenne
EP0566522A1 (fr) * 1992-04-15 1993-10-20 Celwave R.F. A/S Système d'antenne et méthode de fabrication dudit système

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7109936B2 (en) 2004-01-13 2006-09-19 Kabushiki Kaisha Toshiba Antenna and radio communication device provided with the same
EP1555720A1 (fr) * 2004-01-13 2005-07-20 Kabushiki Kaisha Toshiba Antenne dipôle et dispositif de radio communication comprenant celle-ci
EP1679763A3 (fr) * 2004-12-28 2006-08-16 DX Antenna Co., Ltd. Antenne
US7205955B2 (en) 2004-12-28 2007-04-17 Dx Antenna Company, Limited Antenna
CN101147294B (zh) * 2005-04-15 2012-04-04 诺基亚公司 具有多个谐振频率的天线
WO2006109184A1 (fr) 2005-04-15 2006-10-19 Nokia Corporation Antenne dotee d'une pluralite de frequences de resonance
EP1869726A1 (fr) * 2005-04-15 2007-12-26 Nokia Corporation Antenne dotee d'une pluralite de frequences de resonance
EP1869726A4 (fr) * 2005-04-15 2011-05-04 Nokia Corp Antenne dotee d'une pluralite de frequences de resonance
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CN103700923A (zh) * 2013-11-27 2014-04-02 西安电子科技大学 一种高增益双频基站天线
CN103700923B (zh) * 2013-11-27 2015-11-04 西安电子科技大学 一种高增益双频基站天线
CN109950682A (zh) * 2017-10-27 2019-06-28 联发科技股份有限公司 天线封装和通信装置
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DK1098391T3 (da) 2005-04-04
DE60017674D1 (de) 2005-03-03
AU6965600A (en) 2001-05-10
AU778969B2 (en) 2004-12-23
BR0005243A (pt) 2001-06-19
EP1098391B1 (fr) 2005-01-26
CN1169387C (zh) 2004-09-29
EP1098391A3 (fr) 2003-05-14
CN1298265A (zh) 2001-06-06
MXPA00010804A (es) 2003-04-25
DE60017674T2 (de) 2005-12-29

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