Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
2007-02-13
2007-02-13
Nguyen, Hoang V. (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
C343S872000
Reexamination Certificate
active
11094219
ABSTRACT:
An antenna system designed to enhance power efficiency of a patch antenna for wireless transmission is provided. The system includes a patch antenna, a reflective plate, a transmission line, and a printed circuit board assembly. The reflective plate is arranged at the position of¼λ away from the patch antenna, to reflect the electro-magnetic waves, radiated behind the patch antenna. Because the antenna and the reflective plate are away from¼λ, the reflective signals returned to the patch antenna constructively interfere with the signal radiated from the antenna. Therefore, the provided system may strengthen the gain of the antenna. Further, the electromagnetic interference is decreased at the position close to the printed circuit board assembly behind the reflective plate.
REFERENCES:
patent: 6492950 (2002-12-01), Nakano et al.
patent: 6816120 (2004-11-01), Kuramoto
patent: 6914581 (2005-07-01), Popek
patent: 2002-141742 (2002-05-01), None
patent: 558080 (2003-10-01), None
Alemu Ephrem
Nguyen Hoang V.
Rabin & Berdo P.C.
Z-Com Inc.
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