Communications: radio wave antennas – Antennas – Spiral or helical type
Reexamination Certificate
2006-11-07
2006-11-07
Chen, Shih-Chao (Department: 2821)
Communications: radio wave antennas
Antennas
Spiral or helical type
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.
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Ryou Byung-Hoon
Sung Weon-Mo
A Minh Dieu
Chen Shih-Chao
E.M.W. Antenna Co., Ltd.
patenttm.us
Walters James H.
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