Multiple bands type antenna and method for producing the same

Communications: radio wave antennas – Antennas – Spiral or helical type

Reexamination Certificate

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Details

C343S702000

Reexamination Certificate

active

07132998

ABSTRACT:
The present invention relates to a multiple band-type antenna and method of producing the same. In the present invention, a connector member formed by cutting a cylindrical metallic rod and a first helical antenna are integral through a connection member. A space forming an impedance transformer is formed at the connection member for thereby widening a band region based on a series inductance effect. A helical antenna and a whip antenna are additionally installed at a center of the dielectric surrounding the inner and outer sides of the first helical antenna and the connection member for thereby enhancing an efficiency of the antenna by overcoming the unbalance problems encountered in the conventional art.

REFERENCES:
patent: 4772895 (1988-09-01), Garay et al.
patent: 5661495 (1997-08-01), Saldell
patent: 5764191 (1998-06-01), Tsuda
patent: 5861859 (1999-01-01), Kanayama et al.
patent: 6057807 (2000-05-01), Marthinsson et al.
patent: 6075488 (2000-06-01), Hope
patent: 6215451 (2001-04-01), Hadzoglou
patent: 6262693 (2001-07-01), Sutter et al.
patent: 6369775 (2002-04-01), Moore et al.
patent: 593185 (1993-10-01), None

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