Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
2009-06-19
2011-10-25
Le, Hoanganh (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
C343S702000, C343S850000
Reexamination Certificate
active
08044865
ABSTRACT:
The planar multi-directional antenna mainly contains a flat casing and a double-layered circuit board housed inside the casing. The circuit board's two major sides are patterned in a symmetrical manner and traces are routed and extended along the circumference of the circuit board for producing multi-directional reception field pattern. A raised metallic plate is configured in the center on a first major side for avoiding the coupling effect from current converging in the center and for overcoming the dielectric loss by using air. A ferrite core is configured at the feeding terminal of the antenna as a means of impedance conversion. A SMD inductor and a SMD capacitor are provided on the other major side for increasing the antenna's capability of receiving signals of larger wavelength.
REFERENCES:
patent: 7936313 (2011-05-01), Hockey et al.
patent: 2006/0109192 (2006-05-01), Weigand
patent: 2006/0125697 (2006-06-01), Hung et al.
Le Hoang-anh
Lei Leong C.
San Wen (H.K.) International Co., Ltd.
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