WO2009040830A3 - Multimode prime focal feeds for highly efficient elliptical beams for microwave sensors - Google Patents

Multimode prime focal feeds for highly efficient elliptical beams for microwave sensors Download PDF

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Publication number
WO2009040830A3
WO2009040830A3 PCT/IN2008/000224 IN2008000224W WO2009040830A3 WO 2009040830 A3 WO2009040830 A3 WO 2009040830A3 IN 2008000224 W IN2008000224 W IN 2008000224W WO 2009040830 A3 WO2009040830 A3 WO 2009040830A3
Authority
WO
WIPO (PCT)
Prior art keywords
feeds
elliptical
multimode
highly efficient
beams
Prior art date
Application number
PCT/IN2008/000224
Other languages
French (fr)
Other versions
WO2009040830A2 (en
Inventor
S. B. Sharma
V. K. Singh
S. B. Chakrabarty
A. C. Mathur
Original Assignee
Indian Space Research Organisation
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 Indian Space Research Organisation filed Critical Indian Space Research Organisation
Publication of WO2009040830A2 publication Critical patent/WO2009040830A2/en
Publication of WO2009040830A3 publication Critical patent/WO2009040830A3/en

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Classifications

    • 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
    • H01Q19/02—Details
    • H01Q19/021—Means for reducing undesirable effects
    • H01Q19/023—Means for reducing undesirable effects for reducing the scattering of mounting structures, e.g. of the struts

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

This invention relates to development of a method and a elliptical multimode feeds, which are laterally displaced in the focal plane of a parabolic reflector of circular aperture in order to achieve two squinted elliptical beams with the required angular spacing. The asymmetry in the secondary beams is realized by illuminating the reflector with elliptic patterns of the elliptical feeds. The elliptical feeds yield different edge illumination tapers in the principal planes. The elliptical feeds consist of elliptical rings similar to the concept of circular coaxial feeds. The parameters of the feeds have been optimized to get the required amplitude and phase distribution in the dominant and higher order modes to synthesize sector shape elliptical radiation patterns.
PCT/IN2008/000224 2007-09-26 2008-04-04 Multimode prime focal feeds for highly efficient elliptical beams for microwave sensors WO2009040830A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN2173CH2007 2007-09-26
IN2173/CHE/2007 2007-09-26

Publications (2)

Publication Number Publication Date
WO2009040830A2 WO2009040830A2 (en) 2009-04-02
WO2009040830A3 true WO2009040830A3 (en) 2012-11-29

Family

ID=40512000

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2008/000224 WO2009040830A2 (en) 2007-09-26 2008-04-04 Multimode prime focal feeds for highly efficient elliptical beams for microwave sensors

Country Status (1)

Country Link
WO (1) WO2009040830A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104700457B (en) * 2015-03-20 2018-09-14 广州中海达卫星导航技术股份有限公司 Picture dot screening, filtering method and the system of wind vector retrieval under rainfall situation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102073195B (en) * 2010-12-14 2012-07-25 中国科学院长春光学精密机械与物理研究所 Focusing mechanism for focal plane of eccentric shaft
CN104537719A (en) * 2015-01-12 2015-04-22 广州中海达卫星导航技术股份有限公司 SeaWindsscatterometer sub-satellite point wind vector inverted pixel screening and filtering method and system
CN104700456A (en) * 2015-03-18 2015-06-10 广州中海达卫星导航技术股份有限公司 Method and system for pixel screening and filtering of SeaWinds scatterometer wind vector inversion
CN112201922B (en) * 2020-09-28 2022-06-24 中国电子科技集团公司第五十四研究所 Installation method of giant spherical reflector antenna feed cabin supporting frame

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1691446A1 (en) * 2005-02-11 2006-08-16 Andrew Corporation Multiple beam feed assembly
WO2007087821A1 (en) * 2006-01-31 2007-08-09 Newtec Cy Multi-band transducer for multi-band feed horn
CN101029928A (en) * 2006-02-27 2007-09-05 中国科学院空间科学与应用研究中心 Satellite scanning radar scatterometer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1691446A1 (en) * 2005-02-11 2006-08-16 Andrew Corporation Multiple beam feed assembly
WO2007087821A1 (en) * 2006-01-31 2007-08-09 Newtec Cy Multi-band transducer for multi-band feed horn
CN101029928A (en) * 2006-02-27 2007-09-05 中国科学院空间科学与应用研究中心 Satellite scanning radar scatterometer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104700457B (en) * 2015-03-20 2018-09-14 广州中海达卫星导航技术股份有限公司 Picture dot screening, filtering method and the system of wind vector retrieval under rainfall situation

Also Published As

Publication number Publication date
WO2009040830A2 (en) 2009-04-02

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