Title:
【発明の名称】複合アンテナ装置
Document Type and Number:
Japanese Patent JP3439772
Kind Code:
B2
Abstract:
A composite antenna apparatus comprising a balun connected to an inner conductor at the upper end of a coaxial line 11, one end of a helical element formed by a pair of wire conductors is connected to the balun, the other end is wound symmetrically around the coaxial line using the the coaxial line as a center so as to face the balun and is connected to the outer conductor 13 at the lower end of the coaxial line. The provision of an outer conductor connecting terminal connected to the outer conductor and an inner conductor connecting terminal connected to the inner conductor at the lower end of the coaxial line, allows the formation, on the same axis, of a helical antenna fed by the coaxial line via the helical element and a monopole antenna formed by the outer conductor of the coaxial line. Thereby equivalent gain in the horizontal plane and a reduction in the occupied volume is achieved.
Inventors:
Tsutomu Endo
Isamu Chiba
Masataka Otsuka
Yoshihiko Konishi
Shuji Urasaki
Isamu Chiba
Masataka Otsuka
Yoshihiko Konishi
Shuji Urasaki
Application Number:
JP52364999A
Publication Date:
August 25, 2003
Filing Date:
December 03, 1997
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H01Q1/24; H01Q5/00; H01Q5/10; H01Q5/40; H01Q9/30; H01Q11/08; H01Q21/29; H01Q21/30; (IPC1-7): H01Q5/00; H01Q1/24; H01Q9/30; H01Q11/08; H01Q21/30
Domestic Patent References:
| JP6330006A | ||||
| JP4134906A | ||||
| JP865034A | ||||
| JP9107223A | ||||
| JP927710A | ||||
| JP918215A | ||||
| JP8204420A |
Attorney, Agent or Firm:
Hiroaki Tazawa (1 person outside)