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W频段FMCW收发前端关键技术研究
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摘要
本文介绍了一种工作于W频段的调频连续波(FMCW)收发前端。其中发射信号为93.3GHz±300MHz的锯齿波调频信号,发射功率大于400m W;接收支路本振频率为95.7GHz±300MHz的调频信号,实现在W频段直接去调频接收,并与输入的93.3GHz±300MHz调频信号IQ下混频至一中频2.4GHz,该中频信号经再次下混频后得到60MHz基带信号。该收发前端的接收增益和动态范围均大于60d B,研制的该前端为W频段FMCW雷达提供了一种有效的射频前端解决方案。本文提出该系统前端的总体设计方案,并具体分析,制作和测试了各部分的电路。
In this paper, a kind of W-band frequency modulated continuous wave(FMCW) transceiver front-end is introduced. The output sawtooth wave FMCW signal frequency of the transmitting branch are 93.3GHz±300MHz and the transmitted power is greater than 400 m W; The local oscillator(LO) FMCW signal frequency of the receiving branch is 95.7GHz±300MHz, dechirping directly on W-band. Then the LO signal and receiving signal quadrature down-conversion to the first intermediate frequency(IF) of 2.4GHz, and then this IF signal down-conversion to 60 MHz again,getting the baseband signal. The gain and dynamic range of this transceiver front-end are both greater than 60 d B, the designed transceiver provides an effective solution to RF front-end for W-band FMCW radars. The overall design scheme of the system is proposed in this paper, the structure and circuits of each part of the transceiver front-end are analyzed concretely.
引文
[1]裴乃昌.W频段机场异物探测雷达收发前端[J].电讯技术,2013,53(10):1357-1361.
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    [6]马海虹.W波段低相噪锁相频综技术研究[D]:[博士学位论文].成都:电子科技大学2007,38-40.

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