Broadbanded microstrip antenna having series-broadbanding capaci

Details Broadbanded microstrip antenna having series-broadbanding capaci Broadbanded microstrip antenna having series-broadbanding capaci

1986-05-20

1989-05-30

Sikes, William L.

Communications: radio wave antennas

Antennas

Microstrip

343822, H01Q 138

Patent

active

048355399

ABSTRACT:
The feedline connection to a microstrip antenna patch is designed to integrally include a predetermined capacitance for broadbanded operation. RLC parameters of a parallel circuit model for a specific radiator for a given feedpoint location are measured or otherwise determined. A series LC feed network is then employed and predetermined series LC parameters are chosen so as to optimize the desired bandwidth for the resulting two-stage band pass filter network. The resulting broadbanded microstrip antenna system, network may provide an operating bandwidth on the order of 30% (with less than 2:1 VSWR).

REFERENCES:
patent: 4320401 (1982-03-01), Schiavone
patent: 4386357 (1983-05-01), Patton
patent: 4475108 (1984-10-01), Moser
patent: 4531130 (1985-07-01), Powers
Fong et al, "Wideband Multilayer Coaxial-Fed Microstrip Antenna Element", 21 Electronic Letters No. 11, pp. 497-499 (1985).
Griffin, J. M. and Forrest, J. R., `Broadband Circular Disc Microstrip Antenna`, Electron. Letters, 1982, 18, pp. 266-269.

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