Communications: radio wave antennas – Antennas – Switching between antennas and lines
Reexamination Certificate
2006-10-31
2006-10-31
Nguyen, Hoang V. (Department: 2821)
Communications: radio wave antennas
Antennas
Switching between antennas and lines
C343S745000, C343S750000, C343S895000
Reexamination Certificate
active
07129907
ABSTRACT:
The present invention is directed to multi-element antennas that include, for each adjacent pair of antenna elements, at least one switch arranged to selectively connect that pair to thereby selectively alter an antenna dimension. Accordingly, a multi-element antenna can be configured to enhance its gain at different operational frequencies while a corresponding impedance matching network can enhance the impedance match (i.e., reduce reflected signal energy) between the antenna and a corresponding system (e.g., a transceiver system). The antenna and system can thus be effectively tuned across a wide operational band. The antenna and impedance matching network are configured with switch command signals and match command signals that are provided in response to each of a plurality of frequency codes.
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Lin Jian Quan
Lin Zhen Biao
Robin Seymour
Koppel Patrick & Heybl
Nguyen Hoang V.
Sensor Systems, Inc.
Tran Chuc
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