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利用混合单片集成的方法,在Rogers 5880基片上设计了一款基于零中频架构的Ka波段小型化、低功耗多普勒雷达探头前端。该前端包括PHEMT振荡器、Ka波段单片放大器有源部件,以及混频检波二极管、wilkinson功分器、微带同轴过渡、矩形微带贴片天线无源部件。探头前端的电路和天线部分分别设计在金属圆盘正面和反面。测试得到输出频率34.64GHz、输出功率12.56d Bm,整个多普勒探头前端的功耗为250m W。对雷达散射面积为10cm2的金属物体,在10cm远处的检波输出电压峰峰值达到100m V,整个雷达探头集成于直径20mm,高度为6mm的圆柱腔体内。该设计实现了小型化低功耗的设计要求。
Based on hybrid monolithic integration, a Ka-band miniaturized and low-power Doppler radar probe tip based on zero-IF architecture was designed on the Rogers 5880 substrate. The front end includes a PHEMT oscillator, Ka-band monolithic amplifier active components, and mixed-frequency detection diodes, wilkinson power splitters, microstrip coaxial transition, rectangular microstrip patch antenna passive components. Probe front-end circuit and antenna parts were designed on the front and back of the metal disc. Test output frequency of 34.64GHz, the output power of 12.56d Bm, the entire Doppler probe front-end power consumption of 250mW. For a metal object with a radar scattering area of 10cm2, the peak-to-peak detection output voltage at 10cm distance reaches 100mV. The whole radar probe is integrated into a cylindrical cavity with a diameter of 20mm and a height of 6mm. This design achieves the design requirements of miniaturization and low power consumption.