U-shaped multi-frequency antenna of high efficiency

Details U-shaped multi-frequency antenna of high efficiency U-shaped multi-frequency antenna of high efficiency

2005-02-01

2005-02-01

Phan, Tho (Department: 2821)

Communications: radio wave antennas

Antennas

With radio cabinet

C343S7000MS

Reexamination Certificate

active

06850199

ABSTRACT:
A U-shaped multi-frequency antenna of high efficiency, the antenna has a common feed line connected with an inner and an outer U-shaped wire in symmetrical forms respectively to decide impedance bandwidths of frequency bands selected, and has a balanced circuit of the structure of a Balun circuit having a gradually tapered microstrip to harmonize the impedance bandwidths. Thereby such an omni-directional multi-frequency antenna with a high gain and a bandwidth can be conveniently manufactured.

REFERENCES:
patent: 6259407 (2001-07-01), Tran
patent: 6304219 (2001-10-01), Rothe
patent: 6542128 (2003-04-01), Johnson et al.
patent: 6653984 (2003-11-01), Park et al.
patent: 6677905 (2004-01-01), Deguchi et al.
patent: 6683575 (2004-01-01), Sekine et al.

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