Title :
Dielectric-loaded horn feeds for radiometer antenna
Author_Institution :
AK Electromagn. Inc., Dollard-des-Ormeaux, Que., Canada
Abstract :
The authors have developed a low-loss high-quality dielectric material that can be used in space antennas. A 7.5 degrees semi-flare angle dielectric-loaded horn is shown. The dielectric material is placed against the thin-wall metal cone of the horn and a thin layer of Left Koweld glue is used in the gap. Experimental E- and H-plane patterns of the horn antenna at 15.3 GHz are shown. The peak cross-polarization level is better than -40 dB at 6.84, 10.68, 18.7, 23.8, 36.5, and 90 GHz. Computed copolar footprints of a typical radiometer antenna using the dielectric-loaded horn feed are shown.<>
Keywords :
antenna feeders; antenna radiation patterns; dielectric-loaded antennas; radiometers; waveguide antennas; 10.68 GHz; 15.3 GHz; 18.7 GHz; 23.8 GHz; 36.5 GHz; 6.84 GHz; 90 GHz; E-plane patterns; H-plane patterns; copolar footprints; cross-polarization level; dielectric material; horn antenna; horn feeds; radiometer antenna; semi-flare angle dielectric-loaded horn; space antennas; thin-wall metal cone; Antenna feeds; Antennas and propagation; Dielectric materials; Electromagnetic waveguides; Horn antennas; Mechanical factors; Microwave radiometry; Permittivity; Reflector antennas; Thin wall structures;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1989. AP-S. Digest
Conference_Location :
San Jose, CA, USA
DOI :
10.1109/APS.1989.134984
