A 240 GHz circular polarized FMCW radar based on a SiGe transceiver with a lens-integrated on-chip antenna
A 240 GHz circular polarized FMCW radar based on a SiGe transceiver with a lens-integrated on-chip antenna
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基于带有透镜集成片上天线的 SiGe 收发器的 240 GHz 圆极化 FMCW 雷达
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
U. Pfeiffer
中科院分区：
文献类型：
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作者：
K. Statnikov;N. Sarmah;J. Grzyb;S. Malz;B. Heinemann;U. Pfeiffer
提出了一种基于单天线收发芯片的240 GHz单基地圆极化SiGe FMCW雷达系统。雷达收发器前端采用低成本0.13 μm SiGe HBT技术版本，截止频率fT /fmax为300/450 GHz。发射模块包括一个宽带x16倍频器链、一个3级PA，而接收模块包括一个LNA、一个基波正交下变频混频器和一个用于驱动混频器的3级PA。差分分支线耦合器和差分双极化片上天线完成了收发器架构。所有构建块都是完全差分实现的。在圆极化雷达收发机中使用单个天线导致紧凑的尺寸和高灵敏度。在236 GHz时，从配备硅透镜的雷达模块测得的峰值辐射功率为+3 dBm（EIRP）。雷达收发器的工作带宽为60 GHz，中心频率为240 GHz。经过系统标定后，距离分辨力达到3.65mm，仅比理论极限高出21%。
A 240 GHz monostatic circular polarized SiGe FMCW radar system based on a transceiver chip with a single on-chip antenna is presented. The radar transceiver front-end is implemented in a low-cost 0.13-μm SiGe HBT technology version with cutoff frequencies fT /fmax of 300/450 GHz. The transmit block comprises a wideband x16 frequency multiplier chain, a 3-stage PA, while the receive block consists of an LNA, a fundamental quadrature down-conversion mixer, and a 3-stage PA to drive the mixer. A differential branch line coupler, and a differential dual polarized on-chip antenna complete the transceiver architecture. All building blocks are implemented fully differential. The use of a single antenna in the circular polarized radar transceiver leads to compact size and high sensitivity. The measured peak radiated power from the Si-lens equipped radar module is +3 dBm (EIRP) at 236 GHz. The operational bandwidth of the radar transceiver is 60 GHz around the center frequency of 240 GHz. After system calibration a range resolution of 3.65 mm is achieved, which is only 21% above the theoretical limit.