CORDLESS TELEPHONE SET

PURPOSE:To avoid interference due to radio waves in the cordless telephone set having two systems of radio circuits in its master set. CONSTITUTION:An exclusive antenna 13(14) is provided in a radio circuit 11(12) in a master set A respectively and the circuits are arranged apart from each other, an...

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Bibliographic Details
Main Author YASUNO JUNICHI
Format Patent
LanguageEnglish
Published 12.02.1993
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
TRANSMISSION
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Summary:PURPOSE:To avoid interference due to radio waves in the cordless telephone set having two systems of radio circuits in its master set. CONSTITUTION:An exclusive antenna 13(14) is provided in a radio circuit 11(12) in a master set A respectively and the circuits are arranged apart from each other, and they are communicated with a respective radio circuit 15(17) of a slave set B1(B2) via an antenna 16(18) to realize the interference of the radio waves in the master set A without use of an exclusive electric circuit. One antenna in the master set A is built in to improve the external appearance, and the built-in antenna is tuned to two frequencies by a lumped constant circuit and a copper foil pattern to improve the deterioration in the arrival distance of the radio wave due to the built-in configuration.
Bibliography:Application Number: JP19910194325