Patent ID: 8073407

Claim:
A radio communication device, comprising: a signal source that generates a transmission signal; an antenna; a high-frequency power amplifying part that supplies the transmission signal to said antenna; a rectifying part that converts a high-frequency signal into a direct current power; a circulator having a first port connected to the output of said high-frequency power amplifying part, a second port connected to said antenna and a third port connected to said rectifying part, and configured such that an input from the first port is outputted to the second port, and an input from the second port is outputted to the third port; and a power supply unit that feeds electric power at least to said high-frequency power amplifying part; and a phase shifter, inserted between said antenna and the second port of said circulator, that adjusts a phase of a transmission signal reflected by said antenna so as not to be in reverse relation with a phase of a transmission signal leaked from the first port to the third port of said circulator, wherein a direct current power from said rectifying part is supplied to at least one of said high-frequency power amplifying part and another functional constituent part in said radio communication device.