Vol. 7

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2009-03-19

Removal of Beam Squinting Effects in a Circularly Polarized Offset Parabolic Reflector Antenna Using a Matched Feed

By Shashi Sharma, Dhaval A. Pujara, Soumyabrata B. Chakrabarty, and Vijay Kumar Singh
Progress In Electromagnetics Research Letters, Vol. 7, 105-114, 2009
doi:10.2528/PIERL08122402

Abstract

This paper presents the design of a tri-mode matched feed horn to remove the beam squinting effects in a circularly polarized offset parabolic reflector antenna. In a conical horn, three modes i.e., TE11, TM11 and TE21 are combined in proper amplitude and phase proportion to obtain a tri-mode matched feed configuration. The proposed tri-mode horn is then used as a primary feed device to illuminate the circularly polarized offset parabolic reflector antenna. The simulated data on radiation characteristics of the offset reflector are used to estimate the magnitude of beam squinting and the results are compared with that of a conventional potter horn fed offset reflector. The experimental results on secondary radiation pattern are also incorporated in the paper.

Citation


Shashi Sharma, Dhaval A. Pujara, Soumyabrata B. Chakrabarty, and Vijay Kumar Singh, "Removal of Beam Squinting Effects in a Circularly Polarized Offset Parabolic Reflector Antenna Using a Matched Feed," Progress In Electromagnetics Research Letters, Vol. 7, 105-114, 2009.
doi:10.2528/PIERL08122402
http://www.jpier.org/PIERL/pier.php?paper=08122402

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