ANTENNA SYSTEM

Japanese Patent JP3301897

B2

PROBLEM TO BE SOLVED: To prevent the degradation of antenna gain and to relax the fluctuation of antenna resonance frequency by drawing a 1st coaxial line out of a casing at the time of communication and instructing a planar antenna at any prescribed position away from the casing while using the 1st coaxial line.
SOLUTION: This antenna system is provided with a back electricity absorption type microstrip planar antenna 5 and a supporter 15 for supporting this antenna and can be freely elongated/contracted on a portable telephone 20. A 2nd coaxial line 14 to be connected to a radio circuit is provided for housing the antenna 5 in the portable telephone 20 and drawing it out. This coaxial line is made into curled cord and made elastic and the lower end part of 1st coaxial line 13, which is also used as supporter 15, is connected to the coaxial line 14. At the time of housing, the coaxial line 14 is shrunk and at the time of drawing, the coaxial line 14 can be utilized. The planar antenna 5 is operated as a circular polarized wave antenna by suitably designing the dielectric constant and dimension of dielectric substrate, the parameter of thickness of dielectric substrate, the dimension of patch-shaped conductor added to a dielectric and the position of power feeding pin or the like.

Akihiko Uchino
Akihiro Suguro

JP24602395A

July 15, 2002

September 25, 1995

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Kyocera Corporation

H01Q21/06; H01Q1/24; H01Q13/08; (IPC1-7): H01Q1/24; H01Q13/08; H01Q21/06

JP9294286A
JP9232842A
JP514044A
JP4120902A
JP6268574A
JP7115380A
JP6125290A
JP8340207A
JP6303016A

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