Applied Electromagnetics

Applied Electromagnetics

Design and Fabrication of a Wide Beam Stepped Choke Ring Antenna for X band Links of LEO Satellites

Abstract
Choke  ring  antenna  is  one  of  the  best  options  among  many  types  of  antennas  being  used for  LEO  satellites
operating  in  microwave  frequencies.  In  this  paper,  a  four-ring  stepped  choke  ring  antenna  with  a  descending
profile  has  been  designed,  optimized,  fabricated  and  tested.  This  cylindrical  waveguide  fed  antenna  produces
circular polarization by using a septum. The wide radiation pattern of this antenna covers 125 degrees in 10.5
GHz with a gain better than 3dB. To minimize the effects of the satellite body and solar panels on the radiation
pattern,  the  antenna  has  been  mounted  on  a  satellite mock-up    whose  effects  have  been  fully  investigated  in
simulation and measurement..
Keywords
Stepped Choke Ring Antenna
LEO Satellite
Parasitic Effect of Body
Antenna Installation
X Band Link
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  • Receive Date 16 April 2017
  • Revise Date 25 February 2019
  • Accept Date 19 September 2018
  • Publish Date 22 October 2016