Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1995-05-31
1997-07-01
Hajec, Donald T.
Communications: radio wave antennas
Antennas
With radio cabinet
H01Q 124
Patent
active
056443196
ABSTRACT:
A novel design of high frequency hidden hand-held antenna which includes two metal arms above a lower arm of finite ground plane. By properly choosing the lengths of these arms and the separations between them, the bandwidth can be broadened more than 20%. Thus, it is suitable for personal mobile communication applications. A full wave equivalent circuit analytic model is also developed to analyze and optimize the geometrical configuration including the lengths and separations between the arms. Numerical analyses for current distribution on the conductor surface and various antenna characteristics such as input impedance and radiation patterns are computed by the use of the analytical models. Experimental results and numerical computations all confirm that better performance characteristics including broadened antenna bandwidth are achieved by this novel antenna.
REFERENCES:
patent: 4584585 (1986-04-01), Marko et al.
patent: 4641366 (1987-02-01), Yokoyama et al.
patent: 4876552 (1989-10-01), Zakman
patent: 5144324 (1992-09-01), Chin et al.
patent: 5365246 (1994-11-01), Rasinger et al.
Chen Yung Jinn
Lee Dou-Ken
Li Hsueh-Jyh
Wu Ruey-Beei
Hajec Donald T.
Industrial Technology Research Institute
Lin Bo-In
Phan Tho
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