Communications: radio wave antennas – Antennas – Antenna with parasitic director
Reexamination Certificate
2005-12-06
2005-12-06
Chen, Shih-Chao (Department: 2821)
Communications: radio wave antennas
Antennas
Antenna with parasitic director
C343S834000
Reexamination Certificate
active
06972729
ABSTRACT:
A broadband/multiband circular array antenna is disclosed. One embodiment comprises a circular directional array antenna comprising a driven omnidirectional traveling-wave antenna element coupled to a transceiver via a feed and a plurality of surface-waveguide elements symmetrically positioned about and spaced from the driven omnidirectional traveling-wave antenna element. Each surface-waveguide element receives a control signal configured to selectively alter its waveguide characteristics to electronically direct a beam to/from the array. The array provides a directionally controllable antenna beam with broadband/multiband frequency performance in a low profile design that is both economical and practical to produce and maintain.
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Chen Shih-Chao
Thomas Kayden Horstemeyer & Risley LLP
Wang Electro-Opto Corporation
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