Stacked microstrip patches

Details Stacked microstrip patches Stacked microstrip patches

2007-09-28

2008-10-14

Owens, Douglas W. (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S757000, C343S763000, C343S841000

Reexamination Certificate

active

07436363

ABSTRACT:
The present invention is a dual frequency and circularly polarized microstrip antenna with a ground plane, a mid layer above the ground plane with a parasitically driven resonant mid patch (for transmissions at a second frequency), a top layer with a directly driven patch parasitically driving the mid patch (for transmissions at a first frequency), and parasitic elements.

REFERENCES:
patent: 5200756 (1993-04-01), Feller
patent: 5210542 (1993-05-01), Pett et al.
patent: 5382959 (1995-01-01), Pett et al.
patent: 6236367 (2001-05-01), Du Toit et al.
patent: 6392600 (2002-05-01), Carson et al.
patent: 6650294 (2003-11-01), Ying et al.
patent: 6795021 (2004-09-01), Ngai et al.
patent: 6940457 (2005-09-01), Lee et al.
patent: 2007/0296635 (2007-12-01), Popugaev et al.

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