Tunable microstrip patch antennas

Details Tunable microstrip patch antennas Tunable microstrip patch antennas

1995-12-07

1998-07-07

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

Microstrip

343745, 333 33, H01Q 138

Patent

active

057775818

ABSTRACT:
A patch antenna is provided with one or more tuning strips spaced therefrom and RF switches to connect or block RF therebetween. When RF is connected between the tuning strips and the patch, the tuning strips increase the effective length of the patch and lower the antenna's resonant frequency, thereby allowing the antenna to be frequency tuned electrically over a relatively broadband of frequencies. If the tuning strips are connected to the patch in other than a symmetrical pattern, the antenna pattern of the antenna can be changed.

REFERENCES:
patent: 4216473 (1980-08-01), Goldfischer et al.
patent: 4479100 (1984-10-01), Moghe et al.
patent: 4751513 (1988-06-01), Daryoush et al.
patent: 4812855 (1989-03-01), Coe et al.
patent: 4918749 (1990-04-01), Entschladen et al.
patent: 5008681 (1991-04-01), Cavallaro et al.
patent: 5389937 (1995-02-01), Kaloi
patent: 5420596 (1995-05-01), Burrell et al.

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