High-frequency transceiver and a radar device provided with it

    公开(公告)号:JP4883922B2

    公开(公告)日:2012-02-22

    申请号:JP2005057221

    申请日:2005-03-02

    Abstract: PROBLEM TO BE SOLVED: To satisfactorily cut off the output of undesired intermediate-frequency signals containing noise to a reception system in a transient state in which high-frequency signals for transmission are switched. SOLUTION: In this high-frequency transmitter/receiver provided with a high-frequency oscillator 1; a brancher 2; an RF switch 3; a hybrid 4; a transmitting/receiving antenna 5; and a mixer 6, an output end of the mixer 6 is provided with an IF switch 7 for cutting off intermediate-frequency signals in an open state and allowing the passage of intermediate-frequency signals in a closed state when high-frequency signals RFt for transmission are stabilized in a non-output state. Since intermediate-frequency signals containing noise by the high-frequency signals RFt for transmission mixed in the mixer 6 do not leak to a subsequent stage of the mixer 6, it is possible to output desired intermediate-frequency signals. COPYRIGHT: (C)2006,JPO&NCIPI

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