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Patent Searching and Data


Title:
FM RECEPTION ANTENNA
Document Type and Number:
Japanese Patent JPH01233805
Kind Code:
A
Abstract:

PURPOSE: To attain the flat mount of an FM reception antenna without being projected from a receiver or a car body, etc., by providing a spiral coil flat plate, a flat conductor plate and an intermediate tap orthogonal to the shaft of a spiral coil.

CONSTITUTION: The spiral coil 10 is made flat, a conductor 20 is opposite to the spiral coil 10 via air 30 being one of an insulator, connected to one end 11 of the spiral coil 10 and made orthogonal to the shaft of the spiral coil 10. Moreover, the intermediate tap 13 is a tap on the spiral coil 10 and connected to a feeder 40. The position of the intermediate tap 13 is a position where the impedance at the antenna side (conductor 20 side) and the impedance of the feeder 40 are made equal. Thus, the antenna is mounted flat without being projected from the receiver or the car body, etc.


Inventors:
HARADA TAKUJI
Application Number:
JP6003588A
Publication Date:
September 19, 1989
Filing Date:
March 14, 1988
Export Citation:
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Assignee:
HARADA IND CO LTD
International Classes:
H01Q11/04; H01Q11/08; (IPC1-7): H01Q11/08
Domestic Patent References:
JPS5664503A1981-06-01
JP59127315B
JP58093007B
JPS6147504B21986-10-20
JP60072010B
JPS61196603A1986-08-30
JPS5299754A1977-08-22
JP54022436B
JPS58198902A1983-11-19
JPS61247115A1986-11-04
Attorney, Agent or Firm:
Kawakubo Shinichi