Research On Key Technology Of The Millimeter-wave Doppler Radar Transceiver Front-end

Millimeter-wave radar is developing rapidly as its advantage of high angular resolution, wide frequency band-with, high Doppler shift frequency and compact size of system. W-band Doppler radar is widely used in variety of speed measuring occasions because of its high speed accuracy. As the core of Doppler radar system, the performance of transceiver front-end directly affects the radar system.This thesis is aimed to develop a transceiver of millimeter-wave Doppler radar system which can transmit a 95 GHz continuous wave signal and obtain the Doppler signal by receiving and demodulating its return signal.In order to ensure the high reliability and stability, the transceiver is realized by using MMIC chips and HMIC technology and it is designed to be coherent so as to improve the noise character and the detection performance.The main work of this thesis includes:1. Choose the transmitter and receiver’s architecture and design the whole scheme of transceiver by analyzing technical demands.2. Modularize the transceiver and distribute requirements each modules, then finish the design and test of millimeter-wave module and IF demodulation module.3. Accomplish the cascade test of the transceiver.4. Point out the deficiencies of this thesis and then propose several improvement methods.According to the test results, the transmitter operating at 95 GHz can output power as high as 16 d Bm. It has lower than-94 d Bc/Hz@10k Hz phase noise, 45 d Bc spur reduction and better than ±5×10-6/h frequency stability. The receiver has lower than 10 d B noise figure, 35 d B receiver gain, and 50Hz~3MHz Doppler frequency.