Millimeter wave high-power low-noise reception front-end

Abstract

The invention provides a millimeter wave high-power low-noise reception front-end, and aims to provide a reception front-end to solve difficulties of high-power burnout resistance and large dynamic range of a millimeter wave low-noise receiver. The millimeter wave high-power low-noise reception front-end is realized according to the following technical scheme: when high-power radio frequency input signals enter the reception front-end, firstly N-channel power division is performed through a microstrip power-dividing network to form N channels of radiofrequency signals, the power of each channel of signals is reduced to 1/N of that of the radio frequency input signals, amplitude limiting of each channel of radiofrequency signals is performed through an amplitude limiter, the power of each channel of signals is limited in the milliwatt magnitude, then the signals are amplified through a low-noise amplifier connected with the amplitude limiter in series and sent to a power synthesis network, power synthesis of the N channels of signals is performed, and a channel of radiofrequency signals are output through synthesis. According to the millimeter wave high-power low-noise reception front-end, the input power of each amplitude limiter is greatly reduced, the power burnout resistant indexes of the reception front-end are greatly increased, 1dB compression points of the synthesis signals are greatly increased compared with single-channel signals, and the dynamic range of the reception front-end is extended.

Description

technical field [0001] The invention relates to the fields of microwave communication, navigation and satellite communication, and is mainly used for a high-power, high-dynamic, low-noise receiving front end of a miniaturized millimeter-wave high-power receiver with anti-burnout power > 2 watts. Background technique [0002] The receiver is an important part of the microwave and millimeter wave system. The function of the receiver is to collect the weak electromagnetic wave signal sent by the transmitting end through the antenna, select the specified frequency band from the numerous electromagnetic waves in the propagation channel, and amplify it step by step and frequency reduction, so that the signal that has been subjected to environmental fading becomes useful information and has the smallest degree of distortion, and the receiving front-end plays a key role in the entire receiver, so it is designed and manufactured with high integration, light weight, and excellent pe...

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the deficiencies of the above-mentioned prior art, and provides a millimeter-wave high-power, high-dynamic, low-noise receiving front-end that can solve the difficulties of resisting high-power burnout and large dynamic range, so as to break through the impossibility of millimeter-wave high-power receivers. Anti-high power burnout and bottleneck of large dynamic range

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