It is low frequency changer null of the harmonic wave which is applied to the millimeter radio wave

摘要

(57) Description of the [summary] The following relates to frequency converter of subharmonic to apply to the millimeter-wave radio. The circuit configuration of the converter is provided with a diplexer filter realized in thin film on the alumina layer, a band-pass part of the local oscillator signal LO / 2 for incoming subharmonic frequency, the filter signal having an intermediate frequency I is formed by a low-pass part of the IF. It is realized in microstrip quartz layer, the common point is connected to the gate of the low-pass filter LPS which is passed through a subharmonic blocks the fundamental frequency signal to the part of both of these. The gate on the other side of the LPS filter, connected to a distal end of the mixer diode pair of GaAs made to be placed in reverse parallel with the same quartz layer on the tip of the other of the pair of diodes to ground. One side is closed by a short-circuit plate, a diode is placed in the center of the cavity of rectangular communicating with the rectangular waveguide opposite side carries a radio frequency signal RF and.