24 GHz circularly polarized Doppler radar with a single antenna
24 GHz circularly polarized Doppler radar with a single antenna
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带单天线的 24 GHz 圆偏振多普勒雷达
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Songcheol Hong
中科院分区：
文献类型：
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作者：
Jeong‐Geun Kim;Sanghoon Sim;S. Cheon;Songcheol Hong
研制了24 GHz单天线圆极化多普勒前端。该雷达系统由24 GHz圆极化多普勒雷达模块、信号调理模块、数据采集单元和信号处理程序组成。采用商用InGaP/GaAsHBT工艺，研制了一款由三级LNA、单端混频器和Lange耦合器组成的24 GHz多普勒雷达接收机前端集成电路。为了减小芯片尺寸并抑制自混频，使用使用Tx泄漏作为混频器的LO信号的单端混频器。所开发的雷达前端的操作演示通过测量人体的生命信号。采用单天线的圆极化多普勒雷达可以同时实现小型化和高灵敏度。
24 GHz circularly polarized Doppler front-end with a single antenna is developed. The radar system is composed of 24 GHz circularly polarized Doppler radar module, signal conditioning block, DAQ unit, and signal processing program. 24 GHz Doppler radar receiver front-end IC which is comprised of 3-stage LNA, single-ended mixer, and Lange coupler is fabricated with commercial InGaP/GaAs HBT technology. To reduce the chip size and suppress self-mixing, single-ended mixer which uses Tx leakage as a LO signal of the mixer is used. The operation of the developed radar front-end is demonstrated by measuring human vital signal. Compact size and high sensitivity can be achieved at the same time with the circularly polarized Doppler radar with a single antenna.