This paper introduces a backscatter IC demonstrating pragmatic BLE connectivity  for wearable sensors as illustrated in Fig. 1 by: 1) integrating a dual-linearly  polarized microstrip patch antenna (DPMPA) that allows concurrent RF energy  harvesting and bidirectional communication in a wearable form factor; 2)  demodulating the downlink BLE packets with improved robustness through a  proposed self-calibrated GFSK demodulator; 3) transforming a reversely-whitened  BLE packet into an SSB GFSK modulated BLE packet via proposed replica VCObased GFSK modulator and inductor-free load-multiplexing reflector.

本文介绍了一款后向散射集成电路（IC），通过以下创新实现了适用于可穿戴传感器的实用型蓝牙低功耗（BLE）连接：

1) 集成了一种双线性极化的微带贴片天线（DPMPA），可在可穿戴设备尺寸限制下同时实现射频（RF）能量收集与双向通信；

2) 通过所提出的自校准GFSK解调器，增强了对下行链路BLE数据包解调的鲁棒性；

3) 利用所设计的基于副本VCO的GFSK调制器及无电感负载复用反射器，将反向去白化的BLE数据包转换为单边带（SSB）GFSK调制的BLE数据包。