| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a circuit becomes very large sized or the like in a relatively low frequency in a conventional practice. SOLUTION: This mixer is provided with a 180 deg. distributor 6 where an IF terminal 12 is connected to a middle point of an output side and which distributes an inputted local wave in a reverse phase, lowpass filters 7a and 7b which are connected to the 180 deg. distributor 6, make the local wave pass through and shirt-circuit an RF signal, a pair of antiparallel diodes 3a and 3b obtained by connecting diodes antiparallelly, an IF short circuit 8 which is connected to the connecting of the pair of the two antiparallel diodes and short-circuits an IF signal and a high pass filter 5 which is connected to the connection, makes RF signal pass through and interrupts the local wave. It is possible to make the mixer small and also to make a frequency characteristic a wide band.
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