Communications: radio wave antennas – Antennas – With radio cabinet
Reexamination Certificate
2006-05-23
2006-05-23
Nguyen, Hoang V. (Department: 2821)
Communications: radio wave antennas
Antennas
With radio cabinet
C343S7000MS, C343S846000
Reexamination Certificate
active
07050010
ABSTRACT:
The invention relates to a dual-band inverted-F antenna with shorted parasitic elements. The antenna of the invention comprises a ground plane, a first radiating arm placed above an edge of the ground plane, a second radiating arm placed above the edge of the ground plane, a shorting arm with a substantially inverted-L shape for electrically connecting the first radiating arm and the second radiating arm to the ground plane, a shorted parasitic arm placed above the edge of the ground plane, and a feeding coaxial cable for transmitting signals. There is a distance between the shorted parasitic arm and the first radiating arm so as to induce extra capacitive reactance to compensate the inductive reactance induced by inserting the feeding coaxial cable. The present invention is suitable for the wireless local area network (WLAN) applications in the 2.4 GHz (2.4–2.484 GHz) and 5 GHz (5.15–5.35, 5.725–5.875 GHz) bands.
REFERENCES:
patent: 6812892 (2004-11-01), Tai et al.
patent: 6861986 (2005-03-01), Fang et al.
patent: 2004/0108957 (2004-06-01), Umehara et al.
patent: 2004/0222923 (2004-11-01), Erkocevic
Chua Boon-Tiong
Lee Cheng-Han
Wang Chi-Yueh
Ladas and Parry LLP
Nguyen Hoang V.
Yageo Corporation
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