Radio frequency switch and wireless communication apparatus...

Details Radio frequency switch and wireless communication apparatus... Radio frequency switch and wireless communication apparatus...

2006-01-03

2006-01-03

Hong, Harry S. (Department: 2642)

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

C333S103000, C333S262000, C455S083000

Reexamination Certificate

active

06983129

ABSTRACT:
A first diode is connected in series to a transmission port, and a low pass filter having transmission band and reception band as passing band is disposed between the first diode and an antenna port. A second diode is connected between the reception port and the ground. A phase shifting function is provided between the first diode and a reception port, having reception band as passing band, so that the impedance as seen from the first diode to the reception port side is almost open in the transmission band when a current flows in the second diode.

REFERENCES:
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patent: 6448868 (2002-09-01), Kato et al.
patent: 6731184 (2004-05-01), Muto et al.

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