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United States of America Patent
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Issued Date -
Jan 3, 2013
app pub date -
Mar 26, 2010
filing date -
Mar 26, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A switching diode 33 interposed in a signal line L31 which is a signal route from an antenna 1, and a switching diode 34 interposed in a signal line L32 which is a signal route from an antenna 2 are provided in an antenna unit 3, and the signal line L31 and the signal line L32 are connected after the switching diodes 33 and 34 are interposed, and then, are connected to a coaxial cable 4, and switching on and off of the switching diode 34 depends on a direction of a direct current flowing in the coaxial cable 4, and has an inverse relationship from each other to control the direction of the direct current flowing in the coaxial cable 4 by a control circuit 53 provided in a tuner unit 5.
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