DocumentCode :
3200014
Title :
Shielded microstrip subarray with large bandwidth and low cross polarization
Author :
Baracco, J.M. ; Brachat, P.
fYear :
1992
fDate :
18-25 June 1992
Firstpage :
293
Abstract :
Two subarrays of four elements have been investigated for possible use in a satellite-borne antenna requiring good cross polarisation performance in the broadside direction. The bottom and sides of the antennas are shielded. Shielding involves replacing the microstrip feed line by a stripline, and then isolating the antenna with lateral shielding. Parasitic resonances which appear in the enclosed feeding structures are eliminated with shorting pins. Both subarrays exhibit almost the same performance, except a better standing wave ratio is observed for the double-patch subarray in the middle of the bandwidth. The major advantage of the latter is the small number of shorting pins used, which permits the realization of more complex feed structures if necessary. The radiation pattern of the single-patch subarray is a little more symmetrical than that of the double-patch subarray; this difference can be attributed to misalignment. Subarrays of this type are suitable for direct integration. They are totally independent and a variety of antennas can be built by associating the desired number of subarrays.<>
Keywords :
antenna radiation patterns; electromagnetic wave polarisation; magnetic shielding; microstrip antennas; microwave antenna arrays; broadside direction; double-patch subarray; feeding structures; integration; large bandwidth; lateral shielding; low cross polarization; parasitic resonances; radiation pattern; satellite-borne antenna; shielded microstrip subarray; shorting pins; single-patch subarray; standing wave ratio; stripline; Antenna feeds; Antenna radiation patterns; Bandwidth; Directive antennas; Microstrip antennas; Pins; Polarization; Resonance; Satellite antennas; Stripline;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-0730-5
Type :
conf
DOI :
10.1109/APS.1992.221941
Filename :
221941
Link To Document :
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