Title:
RADIO EQUIPMENT
Document Type and Number:
Japanese Patent JP3237943
Kind Code:
B2
Abstract:
PURPOSE: To easily miniaturize radio equipment which transmits a weak power by arranging a conductor so as to form Sperrtopf between the external conductor of a coaxial feed line, and disconnecting the loop of a high frequency current.
CONSTITUTION: The Sperrtopf is formed by grounding the conductor to the ground conductor of a circuit board 4 in a cabinet 3 at a point 6 by setting impedance between the external conductor 5b of the coaxial feed line 5 in a direction of ground point 6 from a position 11 in the neighborhood of a feed point 2 and the conductor 10 at high impedance. Thereby, no high frequency current on the outside of the conductor 5b flows, and a current flows on a ground wire 7 of 1/4-wavelength efficiently. Also, the part of the cabinet 3 located in the neighborhood of the ground wire 7 and a Sperrtopf forming part and covering them is constituted of at least an insulating material.
Inventors:
Katsuji Morishita
Application Number:
JP4635393A
Publication Date:
December 10, 2001
Filing Date:
March 08, 1993
Export Citation:
Assignee:
Kyocera Corporation
International Classes:
H01Q1/24; H01P5/10; H01Q9/16; H01Q9/18; H04B1/38; (IPC1-7): H01Q9/16; H01P5/10
Domestic Patent References:
| JP5780803A | ||||
| JP5731237A | ||||
| JP53120939U | ||||
| JP521257B1 | ||||
| JP281755B1 |