Title:
ANTENNA SYSTEM AND PORTABLE RADIO EQUIPMENT
Document Type and Number:
Japanese Patent JPH09260919
Kind Code:
A
Abstract:
To improve the antenna characteristics and to obtain an excellent voltage standing wave ratio characteristic even in the state where the antenna is retracted and antenna is extended.
In the antenna system 11 whose antenna part consists of a 1st antenna and a 2nd antenna, when the antenna part is retracted, the 1st antenna and the 2nd antenna are isolated electrically to form a dipole antenna, and when the antenna part is extended, the 1st antenna and the 2nd antenna are connected electrically to form a monopole antenna. Thus, the 1st antenna and the 2nd antenna act like an antenna even when the antenna is and extended and then the antenna is used efficiently and the antenna characteristics are improved.
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Inventors:
ITO HIROCHIKA
SATO NOBUO
KANAYAMA YOSHITAKA
KURODA SHINICHI
SATO NOBUO
KANAYAMA YOSHITAKA
KURODA SHINICHI
Application Number:
JP9328396A
Publication Date:
October 03, 1997
Filing Date:
March 22, 1996
Export Citation:
Assignee:
SONY CORP
International Classes:
H01Q1/24; (IPC1-7): H01Q1/24
Attorney, Agent or Firm:
Kei Tanabe
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