RADIO EQUIPMENT

PROBLEM TO BE SOLVED: To reduce cost, to attain miniaturization and to prevent the breakdown of components by separating a reception part and a transmission part through a switch means at the time of communication. SOLUTION: A switch control part 11 outputs a 1st control signal at an L-level to a hi...

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Bibliographic Details
Main Author NAKAMURA TAISUKE
Format Patent
LanguageEnglish
Published 12.01.1999
Edition6
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Summary:PROBLEM TO BE SOLVED: To reduce cost, to attain miniaturization and to prevent the breakdown of components by separating a reception part and a transmission part through a switch means at the time of communication. SOLUTION: A switch control part 11 outputs a 1st control signal at an L-level to a high-frequency switch 3. Thus, the high-frequency switch 3 is switched to the side of an antenna 1 dedicated to reception, so as to connect the antenna 1 dedicated to reception and RF/IF reception part 5. On the other hand, the switch control part 11 outputs a 2nd control signal at an H-level to a high-frequency switch 4. Thus, the high-frequency switch 4 is switched to the side of reception, so as to connect a transmission/reception antenna 2 through the high-frequency switch 4 to the other input terminal of the high-frequency switch 3. Then, the switch control part 11 turns the 2nd control signal from the L-level to the H-level. Thus, the high-frequency switch 3 is switched, so as to connect the antenna 2 for transmission/reception with the RF/IF reception part 5 via the high-frequency switches 4 and 3.
Bibliography:Application Number: JP19970160268