| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to eliminate a harmful effect on a radio transmission signal by a frequency drift due to an output side load fluctuation of a local oscillation unit without increasing cost.SOLUTION: A radio communication device is comprised of: a local oscillation unit 13 whose oscillation frequency fis influenced by a load fluctuation; a local oscillation unit 26 whose oscillation frequency fis higher than that of the local oscillation unit 13; a mixer 23 connected between the output side connected to a load of the local oscillation unit 13 and the output side of the local oscillation unit 26; a mixer 21 for multiplying a differential signal LO3a by difference between both signals of the local oscillation units 13, 26 obtained by the mixer 23, by an IF modulation signal S1; a mixer 14 for multiplying a differential signal L4a which is difference between the differential signal LO3a obtained by the multiplication of the mixer 21 and the IF modulation signal S1 by the signal with the oscillation frequency fof the local oscillation unit 13; and a power amplifier 15 for power amplifying a transmission modulation signal S2 from the mixer 14. |
