Title:
RADIO COMMUNICATION APPARATUS
Document Type and Number:
Japanese Patent JP2001196837
Kind Code:
A
Abstract:
To prevent receiving characteristics from being deteriorated by liquid crystal driving noise in a radio communication apparatus with a liquid crystal display device where a receiving frequency is set by a varactor.
In a loop antenna 3 and a tuning variable part 10 constituting an antenna circuit 3, fixed capacity element C1 and C2 are provided at both ends of the varactor DVC1 of the part 110 where the capacity is varied by control voltage from a CPU 7 to insulate the varactor DVC1 and the antenna 3 from each other in terms of DC, thereby the liquid crystal driving noise 9 sneaked into the antenna 3 is kept from sneaking into the varactor DVC1.
Inventors:
NAKANISHI HIDEO
Application Number:
JP2000002674A
Publication Date:
July 19, 2001
Filing Date:
January 11, 2000
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H01Q7/00; H01Q5/00; H01Q5/10; H04B1/10; (IPC1-7): H01Q7/00; H01Q5/00; H04B1/10; H04Q7/14
Attorney, Agent or Firm:
Role Masaaki (3 others)
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