E-plane choke waveguide aperture antenna for front-fed parabolic reflector

Abstract

In this paper, an E-plane choke waveguide aperture antenna is designed for front-fed parabolic reflector. The aperture antenna consists of the radiating rectangular waveguide vertically jointed to the two coupling apertures or the E-plane choke to achieve the symmetrical beam for the X-band frequency operating from 10.00 GHz to 10.50 GHz. The simulated beamwidths in the E and H planes at −3 dB were equally 70° and at −10 dB also equally 137°, while the measured results at −3 dB were equally 70° and at −10 dB equally 135°. The simulation and measured results are in good agreement. The simulated and measured antenna gains are 8.24 dBi and 8.21 dBi respectively. The simulation and measured of waveguide aperture for parabolic front-fed reflector antenna results covering frequency range from 9.91 GHz to 10.61 GHz and 9.98 GHz to 10.51 GHz, respectively. The findings validate the applicability of the antenna as the prime feed for rotationally symmetric parabolic reflectors.