3.6cm2无线供电UWB SoC，具有−30.7dBm整流器灵敏度和低于10cm范围分辨率

2015 IEEE Radio Frequency Integrated Circuits Symposium (RFIC) Pub Date : 2015-05-17 DOI:10.1109/RFIC.2015.7337753

Jian Kang, P. Chiang, A. Natarajan

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引用次数: 16

摘要

本文讨论了一种用于区域受限定位应用的无电池无线供电UWB片上系统(SoC)标签的设计。天线整流器协同设计方法优化了灵敏度，并在标签面积限制下增加了范围。低压(0.8 v) UWB TX通过降低所需的整流器输出电压来实现高整流器灵敏度。2.4GHz整流器、电源管理单元和8GHz UWB TX集成在65nm CMOS中，整流器在1V输出时具有最先进的-30.7dBm灵敏度，天线面积仅为1.3cm²，灵敏度比先前发表的工作提高了2.3倍，频率提高了2.6倍，天线面积缩小了9倍。在办公室走廊的测量显示，距离为20米，TX EIRP为36dBm。0.8 v 8GHz UWB TX在28MHz脉冲重复率下消耗64pJ/脉冲，实现2.4GHz -10dB带宽。无线测量显示，在距离> 10米时，分辨率低于10厘米。

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A 3.6cm2 wirelessly-powered UWB SoC with −30.7dBm rectifier sensitivity and sub-10cm range resolution

This paper discusses the design of a battery-less wirelessly-powered UWB system-on-a-chip (SoC) tag for area-constrained localization applications. An antenna-rectifier co-design methodology optimizes sensitivity and increases range under tag area constraints. A low-voltage (0.8-V) UWB TX enables high rectifier sensitivity by reducing required rectifier output voltage. The 2.4GHz rectifier, power-management unit and 8GHz UWB TX are integrated in 65nm CMOS and the rectifier demonstrates state-of-the-art -30.7dBm sensitivity for 1V output with only 1.3cm2 antenna area, representing a 2.3× improvement in sensitivity over previously published work, at 2.6× higher frequency with 9× smaller antenna area. Measurements in an office corridor demonstrate 20m range with 36dBm TX EIRP. The 0.8-V 8GHz UWB TX consumes 64pJ/pulse at 28MHz pulse repetition rate and achieves 2.4GHz -10dB bandwidth. Wireless measurements demonstrate sub-10cm range resolution at range > 10m.

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2015 IEEE Radio Frequency Integrated Circuits Symposium (RFIC)

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