Title:
ANTENNA FEEDING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2000/019562
Kind Code:
A1
Abstract:
An antenna feeding circuit needing no balanced-to-unbalanced transformer and having a simple structure. A microstrip line comprises a pair of strip conductors (5a, 5b) provided on the outer surface of a tube (1) and an internal conductor (6) provided on the internal surface of the tube (1). A 180° distributing circuit (2) outputs electric powers the phases of which are different by 180° to the strip conductors (5a, 5b) to cancel the unwanted currents produced by connection of a balanced-to-unbalanced line. Since the internal conductor (6) is provided over the whole inner surface of the tube (1), the unwanted currents induced in the internal surface of the internal conductor (6) cancel each other.
Inventors:
ENDO TSUTOMU
FUKASAWA TORU
MIYAZAKI MORIYASU
CHIBA ISAMU
FUKASAWA TORU
MIYAZAKI MORIYASU
CHIBA ISAMU
Application Number:
PCT/JP1999/005260
Publication Date:
April 06, 2000
Filing Date:
September 27, 1999
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H01P5/16; H01Q1/36; H01Q21/20; H01Q1/38; H01Q1/50; H01Q11/08; H01Q21/00; H01Q21/24; (IPC1-7): H01Q11/08; H01Q1/38
Foreign References:
| US5572172A | 1996-11-05 | |||
| JPH10256823A | 1998-09-25 | |||
| JPH0690108A | 1994-03-29 | |||
| JPH0758858B2 | 1995-06-21 | |||
| JPS61205002A | 1986-09-11 |
Other References:
See also references of EP 1041671A4
Attorney, Agent or Firm:
Tazawa, Hiroaki (Kasumigaseki 3-chome Chiyoda-ku Tokyo, JP)
Download PDF: