Communications: radio wave antennas – Antennas – With lumped reactance filter in active antenna
Patent
1998-04-01
2000-03-07
Wong, Don
Communications: radio wave antennas
Antennas
With lumped reactance filter in active antenna
343700MS, 343829, H01Q 124
Patent
active
06034640&
ABSTRACT:
The invention provides an antenna device, comprising: an antenna body including a conductor, an equivalent circuit of said conductor comprising an inductive component and a resistive component in a series connection, wherein a frequency adjusting circuit including at least a parallel circuit of a switching element and a passive element is connected to said conductor of said antenna body. The antenna body is connected in series with said frequency adjusting circuit.
The invention enable to provide a compact antenna device for use in a mobile communication apparatus that performs transmission and reception on frequencies in a wide range.
REFERENCES:
patent: 4475108 (1984-10-01), Moser
Patent Abstracts of Japan vol. 5, No. 137, Aug. 29, 1981 Japan 56 073904 A (Matsushita) Jun. 19, 1981 Abstract.
Mandai Harufumi
Oida Toshifumi
Tsuru Teruhisa
Yoshimoto Yoshihiro
Clinger James
Murata Manufacturing Co. Ltd.
Wong Don
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