Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
2007-12-11
2007-12-11
Chen, Shih-Chao (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
C343S769000, C343S846000
Reexamination Certificate
active
11444810
ABSTRACT:
The present invention by propagates a traveling wave of electric current along a microstrip antenna structure rather than a standing wave. By loading an antenna with a series of capacitive gaps of the correct values, the shape of the electric current distribution can be tailored to suppress the resonant properties of the antenna, specifically the standing wave of electric current that normally forms along the antenna structure. A microstrip antenna having a “bulls-eye target” structure comprised of a center disk and concentrically larger capacitively coupled annular sections will tailor the shape of the electric current distribution to achieve a suppression of the resonant properties of the antenna, thereby increasing the antenna bandwidth.
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Chen Shih-Chao
Kasischke James M.
Nasser Jean-Paul A.
Stanley Michael P.
The United States of America as represented by the Secretary of
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