Title:
ANTENNA ATTENUATOR
Document Type and Number:
Japanese Patent JPH01174007
Kind Code:
A
Abstract:
PURPOSE:To obtain an excellent reception characteristic even at a strong electric field district by connecting an attenuation circuit close to a conductor part of a nearly cylindrical antenna receptacle and controlling the attenuation of the attenuation circuit by an AGC loop of a receiver. CONSTITUTION:An attenuation circuit 5 is mounted to a circuit board 4 and fitted directly to the rear part in an outer conductor 1. The attenuation circuit 5 is connected to an inner conductor 2 via a signal input terminal 5a and connected to an antenna input terminal of a receiver via a signal output terminal 5b, and connected to an AGC loop of the receiver via a connection control voltage input terminal 5c. When a strong electric field signal is given via the inner conductor 2 and the signal input terminal 5a and a control voltage by the AGC loop from the receiver via a control voltage input terminal 50 are inputted, the strong electric field signal is attenuated in response to the control voltage and outputted to the receiver via the signal output terminal 5b.
Inventors:
ORIKABE NORIO
Application Number:
JP33194787A
Publication Date:
July 10, 1989
Filing Date:
December 28, 1987
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H03H7/25; H03G3/30; H04B1/18; (IPC1-7): H03G3/30; H03H7/25; H04B1/18
Attorney, Agent or Firm:
Toshio Nakao (1 outside)