Dual frequency microstrip patch antenna with improved feed and i

Details Dual frequency microstrip patch antenna with improved feed and i Dual frequency microstrip patch antenna with improved feed and i

1986-11-24

1989-05-02

Sikes, William L.

Communications: radio wave antennas

Antennas

Microstrip

343846, H01Q 138

Patent

active

048272710

ABSTRACT:
A dual frequency stacked microstrip patch antenna is comprised of a pair of circular radiating patches separated by a layer of dielectric, the two upper patches being further separated by another layer of dielectric from a pair of separated ground planes. A modal shorting pin extends between the patches and ground planes, and the patches are fed through a pair of feed pins by a backward wave feed network. A pair of pear-shaped holes in the lower patch through which the feed pins pass balance the impedance between the patches and result in an extended bandwidth.

REFERENCES:
patent: 4089003 (1978-05-01), Conroy
patent: 4329689 (1982-05-01), Yee
patent: 4414550 (1983-11-01), Tresselt
patent: 4660048 (1987-04-01), Tresselt
patent: 4660048 (1987-04-01), Doyle

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