EP2131446A2 - Antenne à cornet elliptique à polarité circulaire - Google Patents

Antenne à cornet elliptique à polarité circulaire Download PDF

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Publication number
EP2131446A2
EP2131446A2 EP09170732A EP09170732A EP2131446A2 EP 2131446 A2 EP2131446 A2 EP 2131446A2 EP 09170732 A EP09170732 A EP 09170732A EP 09170732 A EP09170732 A EP 09170732A EP 2131446 A2 EP2131446 A2 EP 2131446A2
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EP
European Patent Office
Prior art keywords
phase
horn
band
antenna feed
section
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.)
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Application number
EP09170732A
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German (de)
English (en)
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EP2131446A3 (fr
Inventor
Scott J. Cook
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Individual
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Individual
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Publication date
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Publication of EP2131446A2 publication Critical patent/EP2131446A2/fr
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    • 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
    • H01Q13/02—Waveguide horns
    • H01Q13/025—Multimode horn antennas; Horns using higher mode of propagation
    • H01Q13/0258—Orthomode horns

Definitions

  • the resulting elliptical antennas maintain a relative small reflector size (collection area) while providing improved of unwanted in the direction This is typically accomplished usually by the long axis of the antenna the geostationary arc.
  • Elliptical can be designed to improve the antenna's performance when multiple feeds are used to receive from or transmit to multiple locations (such as multiple satellites).
  • FIG. 2 is a graphical representation 200 of a prior art configuration illustrating the improper illumination that results from the use of a circular antenna feed horn with an elliptical reflector.
  • the mismatched areas 202a-b represent areas of wasted energy in the receive mode caused by under-illumination along the long axis of the elliptical reflector by the circular feed horn.
  • the mismatched areas 204a-b represent areas of wasted illumination by the circular feed horn in areas the short axis of the elliptical reflector that extend beyond the physical of the reflector. This is also referred to as over-illumination spill-over energy.
  • FIG. 9d which includes FIGS. 9d.1 through 9d.4 , shows various views of a multi-band, multi-port antenna feed horn 950 with an elliptical transition section 952, an initial additive phase differential section 954, a frequency diplexer 956, and a second additive phase differential section 958.
  • the frequency diplexer 956 separates low-band and high band signals propagating through the diplexer.
  • the frequency diplexer delivers the low-band signal to a first set of waveguide ports 957 a-b (one for each linear polarity), and also delivers the high-band signal to the second additive phase differential section 958 , which in turn delivers the high-band signal to a second port 359.
  • the low-band linear polarity pickups are located at the first set of waveguide port 957a-b and the high-band linear polarity pickups are located at the second waveguide port 959 .
  • FIG. 9e which includes FIGS, 9e.1 through 9e.5 , shows various views of a multi-band, multi-porfi antenna feed horn 960 with a circular reception section 961 feeding an initial phase differential section 962, which in turn feeds a frequency diplexer 964 that separates low-band and high band signals propagating through the diplexer.
  • the frequency diplexer delivers the low-band signal to a first set of waveguide ports 966a-b (one for each linear polarity), and also delivers the high-band signal to an oppositely sloped phase differential section 968, which in turn delivers the high-band signal to a second waveguide port 969 .
  • the low-band linear polarity pickups are located at the first set of waveguide port 966a-b and the high-band linear polarity pickups are located at the second waveguide port 969.
  • the elliptical reception section 971 imparts a low-band differential phase shift of 130 degrees and a high-band differential phase shift of 70 degrees.
  • the initial phase differential section 972 imparts a low-band differential phase shift of -40 degrees and a high-band differential phase shift of -25 degrees.
  • the second phase differential section 978 imparts an oppositely sloped -135 degree differential phase shift to the high-band signal.
  • low-band CP polarization is accomplished at the first set of waveguide port 976a-b
  • high-band CP polarization is accomplished at the second waveguide port 979.
  • improved x-pol isolation is accomplished for the low-band signal due to the -40 degrees oppositely slopped phase differential characteristic of the initial phase differential section 972.
  • the center feed horn 1002 receives a beam in the frequency band of 12.7-12.7 GHz (Ku BSS band) from a satellite located at 101 degrees west longitude.
  • the left feed horn 1004 receives a beam in the frequency band of 18.3-18.8 and 19.7-20.2 GHz (Ka band) from a satellite located at 102.8 degrees west longitude,
  • the right feed horn 1006 receives a beam in the frequency band of 18.3-18.8 and 19.7-20.2 GHz (Ka band) from a satellite located at 99.2 degrees west longitude.
  • FIGS. 1a-d illustrate a first current compromised approach (CCA#1).
  • CCA#1 first current compromised approach
  • Many elliptical reflector systems simply use circular beam feeds with conventional CP polarizers in order to preserve good circular polarity cross polarization isolation. This approach is easy to implement but results in significant compromise (degradations) in efficiency, gain noise temperature, beam width, and side lobe performance of the reflector system, because the circular beam feeds do not properly illuminate the elliptical reflector.
  • CCA#3 A third compromised approach referred to as CCA#3 is described in US Patent No. 6,570,542 .
  • the embodiments of the present invention include an undivided elliptical antenna feed horn section to improve over the divided elliptical horn section of CCA#3.
  • phase differential between the 2 orthogonal linear components as they propagate through the horn.
  • leading and lagging phase differential components imparting their opposing differential phase slope effects, allows the combined sections of the antenna horn to introduce a total phase differential between the orthogonal linear components is 90° over a wide frequency band.
  • the resulting cross polarization isolation is better and more constant over the desired frequency band.
  • phase differential vs. freq response for the "opposite slope phase differential section” is oppositely sloped from the phase differential vs. freq response of horn transition, so the resulting total (sum of) phase differential vs. frequency is relatively flat maintaining values close to 90° or an odd integer multiple of 90° over a much greater band width.
  • the elliptical horn transition section could introduce a nominal 70 degrees of phase differential and the opposite phase slope section could introduce a nominal -160 degrees resulting in a nominal -90 degrees total phase differential.
  • the elliptical horn transition section could for example introduce a nominal 470 degrees of phase differential and the opposite phase slope section could introduce a nominal -200 degrees resulting in a nominal 270 degrees total phase differential.
  • the upper freq band continues on through another second phase differential section (SPDS) that the remaining additive phase differential (40 degrees nominally for this example) needed for high band so that the total phase differential is nominally 90 (50 +40) at the center of the upper frequency band.
  • SPDS phase differential introduced at high band by the SPDS (40deg) is additive and the ridges in the SPDS are aligned with the ridges in the IPDS (unless the elliptical horn transition section introduces more phase differential than the IPDS).
  • FIGS. 9b,c,d illustrates additional implementations of this concept for Elliptical Horns with the understanding that the elliptical horn transition section introduces part of the phase differential needed at both the high and low bands.
  • the antenna feed horn 920 described with reference to FIG, 9b includes an elliptical transition section that introduces a nominal 130° of low band phase differential and 70° of high band phase differential.
  • the elliptical transition section 981 introduces a nominal 60° of low band phase differential and 35° of high band phase differential.

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  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)
EP09170732A 2004-05-18 2005-05-18 Antenne à cornet elliptique à polarité circulaire Withdrawn EP2131446A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US57199804P 2004-05-18 2004-05-18
EP05751776A EP1749333A1 (fr) 2004-05-18 2005-05-18 Antenne en cornet elliptique a polarisation circulaire

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP05751776A Division EP1749333A1 (fr) 2004-05-18 2005-05-18 Antenne en cornet elliptique a polarisation circulaire
EP05751776.5 Division 2005-05-18

Publications (2)

Publication Number Publication Date
EP2131446A2 true EP2131446A2 (fr) 2009-12-09
EP2131446A3 EP2131446A3 (fr) 2010-03-24

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EP09170732A Withdrawn EP2131446A3 (fr) 2004-05-18 2005-05-18 Antenne à cornet elliptique à polarité circulaire
EP05751776A Ceased EP1749333A1 (fr) 2004-05-18 2005-05-18 Antenne en cornet elliptique a polarisation circulaire

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EP05751776A Ceased EP1749333A1 (fr) 2004-05-18 2005-05-18 Antenne en cornet elliptique a polarisation circulaire

Country Status (4)

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EP (2) EP2131446A3 (fr)
CN (1) CN1906810B (fr)
CA (1) CA2567417C (fr)
WO (1) WO2005114791A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5450106B2 (ja) * 2007-03-16 2014-03-26 モバイル サット リミテッド 車載アンテナおよび信号を送受信するための方法
CN101872901A (zh) * 2009-04-23 2010-10-27 安德鲁有限责任公司 单元微波天线馈电装置及其制造方法
TWI456836B (zh) * 2010-12-14 2014-10-11 Wistron Neweb Corp 無線通訊天線裝置
CN105210233A (zh) * 2013-02-28 2015-12-30 摩巴尔萨特有限公司 用于接收及/或发送极化通信信号的天线
CN103794885B (zh) * 2014-01-17 2015-11-11 西安空间无线电技术研究所 一种低副瓣前馈反射面天线
CN104167612A (zh) * 2014-08-08 2014-11-26 南京中网卫星通信股份有限公司 一种便携式双偏置抛物面天线

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6015788A (en) 1996-08-15 2000-01-18 Incyte Pharmaceuticals, Inc. Human nucleic acid binding protein
US6570542B2 (en) 2000-07-20 2003-05-27 Acer Neweb Corp. Integrated dual-directional feed horn

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122507A (en) * 1980-03-03 1981-09-26 Nec Corp Antenna having rotary asymmetrical radial beam
DE3203901A1 (de) * 1982-02-05 1983-08-25 AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang Antennenerreger mit mehreren wellentypen
JPH03236602A (ja) * 1990-02-14 1991-10-22 Fujitsu General Ltd 円偏波／直線偏波変換器
US5438340A (en) * 1992-06-12 1995-08-01 Sony Corporation Elliptical feedhorn and parabolic reflector with perpendicular major axes
JP3113510B2 (ja) * 1994-06-29 2000-12-04 ケイディディ株式会社 楕円ビームアンテナ装置
JPH09102708A (ja) * 1995-10-04 1997-04-15 Yagi Antenna Co Ltd パラボラアンテナ用一次放射器
JP2953428B2 (ja) * 1997-05-13 1999-09-27 日本電気株式会社 楕円ステップホーン
JP2000201013A (ja) * 1999-01-06 2000-07-18 Alps Electric Co Ltd フィ―ドホ―ン
JP3692273B2 (ja) * 2000-02-03 2005-09-07 アルプス電気株式会社 一次放射器
US6593893B2 (en) * 2000-03-06 2003-07-15 Hughes Electronics Corporation Multiple-beam antenna employing dielectric filled feeds for multiple and closely spaced satellites
DK1278266T3 (da) * 2001-07-20 2006-02-20 Eutelsat Sa Lavprisantenne med höj ydelse til anvendelse i sende/modtagesatellitterminaler
US7002528B2 (en) * 2002-02-20 2006-02-21 Prodelin Corporation Circularly polarized receive/transmit elliptic feed horn assembly for satellite communications

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6015788A (en) 1996-08-15 2000-01-18 Incyte Pharmaceuticals, Inc. Human nucleic acid binding protein
US6570542B2 (en) 2000-07-20 2003-05-27 Acer Neweb Corp. Integrated dual-directional feed horn

Also Published As

Publication number Publication date
EP2131446A3 (fr) 2010-03-24
WO2005114791A1 (fr) 2005-12-01
EP1749333A1 (fr) 2007-02-07
CA2567417C (fr) 2013-11-19
CA2567417A1 (fr) 2005-12-01
CN1906810B (zh) 2015-11-25
CN1906810A (zh) 2007-01-31

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