Communications: radio wave antennas – Antennas – Microstrip
Patent
1997-11-12
2000-05-09
Vu, David H.
Communications: radio wave antennas
Antennas
Microstrip
343745, H01Q 138
Patent
active
060610255
ABSTRACT:
A patch antenna is provided with one or more tuning strips spaced therefrom and RF switches to connect or block RF currents therebetween. When a control system for the antenna selectively connects and isolates RF currents between certain of the tuning strips and the patch, the tuning strips change the effective length of the patch and thus the antenna's resonant frequency, thereby frequency tuning the antenna electrically over a relatively broad band of frequencies. The control system includes circuitry for rapidly switching the antenna to a desired frequency with minimal delay and with superior isolation from the antenna, making it suitable for use in DAMA, TDMA, and other frequency hopping applications.
REFERENCES:
patent: 4751513 (1988-06-01), Daryoush et al.
patent: 5281974 (1994-01-01), Kuramoto et al.
patent: 5309163 (1994-05-01), Ngan et al.
patent: 5420596 (1995-05-01), Burrell et al.
patent: 5777581 (1998-07-01), Lilly et al.
Humen, Jr. Andrew
Jackson Trent M.
Lilly James D.
McKinzie, III William E.
Atlantic Aerospace Electronics Corporation
Danielson Mark J.
Phan Tho
Vu David H.
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