Electronically tunable planar antenna and method of tuning...

Details Electronically tunable planar antenna and method of tuning... Electronically tunable planar antenna and method of tuning...

2005-08-23

2005-08-23

Vannucci, James (Department: 2828)

Communications: radio wave antennas

Antennas

Microstrip

C343S702000

Reexamination Certificate

active

06933893

ABSTRACT:
An electronically tunable planar antenna12, a wireless communication device10, and a method of tuning an antenna12in which a high band element28and a low band element26each have a resonant center frequency. At any given time, the antenna12has two center resonant frequencies and thus allows the device to operate at two frequencies simultaneously. In addition, tuning circuits38, 36are connected to the low band element26and the high band element28, respectively. The tuning circuits36, 38electronically change the resonant center frequency of the corresponding element26, 28. Accordingly, in the device10the method, and the antenna one or both of the center frequencies can be changed to permit operation at more than two frequencies.

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Yajun and Kwang; “One Novel Single-Patch Dual-Frequency Planar Inverted-F Antenna”; 2000 IEEE 2nd Int'l Conf on Microwave and Millimeter Wave Tech Proceedings; pp. 444-447.

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