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The most important units of the frequency formers are the frequency multipliers. The possibility of creating a microwave high multiplicity frequency multiplier with the built-in microwave switch on n - i - p - i - n -diode has been considered. For allocating the multiplied signal from spectrum the output multisecion bandpass filter in the form of a sequentially counter stud microstrip resonators, tuned to the required 24 harmonic, has been used. The highest switch off effect is achieved when the n - i - p - i - n -diode is turned on so that one n -region of the diode has been galvanically coupled to the input element of the microstrip filter, the other n -region has been connected to the first stud resonator of the bandpass filter. When n - i - p - i - n -diodes are simultaneously switched to the first and central resonators of the band-pass filter, the total relative change of the output signal exceeds 70 dB under the bias voltage changing on each of the n - i - p - i - n -diodes from 0 to 1.7 V.

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