The general function of Image Rejection Mixer (IRM) is a receiver's front

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end mixer/filter, which must greatly attenuate the image frequency. The IRM differs from more common balanced mixer by its capability of suppressing of signals and noises coming from an image channel. The inputs of IRM are LO (local oscillator) and RF frequencies, and the output is the difference between the LO and RF frequencies. According to the positional relationship between LO and RF on frequency band, the IRM could have LO>RF and LO


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