Hou Bing, Chen Hua, Wang Zhiyu, Mo Jiongjiong, Chen Junli, Yu Faxin, Wang Wenbo
School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China.
School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China.
Sensors (Basel). 2017 Jan 24;17(2):223. doi: 10.3390/s17020223.
In this paper, a low power transceiver for wireless sensor networks (WSN) is proposed. The system is designed with fully functional blocks including a receiver, a fractional-N frequency synthesizer, and a class-E transmitter, and it is optimized with a good balance among output power, sensitivity, power consumption, and silicon area. A transmitter and receiver (TX-RX) shared input-output matching network is used so that only one off-chip inductor is needed in the system. The power and area efficiency-oriented, fully-integrated frequency synthesizer is able to provide programmable output frequencies in the 2.4 GHz range while occupying a small silicon area. Implemented in a standard 0.18 μm RF Complementary Metal Oxide Semiconductor (CMOS) technology, the whole transceiver occupies a chip area of 0.5 mm² (1.2 mm² including bonding pads for a QFN package). Measurement results suggest that the design is able to work at amplitude shift keying (ASK)/on-off-keying (OOK) and FSK modes with up to 500 kbps data rate. With an input sensitivity of -60 dBm and an output power of 3 dBm, the receiver, transmitter and frequency synthesizer consumes 2.3 mW, 4.8 mW, and 3.9 mW from a 1.8 V supply voltage, respectively.
本文提出了一种用于无线传感器网络（WSN）的低功耗收发器。该系统设计有包括接收器、分数N频率合成器和E类发射器在内的全功能模块，并在输出功率、灵敏度、功耗和硅面积之间实现了良好的平衡优化。采用了发射机和接收机（TX-RX）共享的输入-输出匹配网络，因此系统中仅需一个片外电感。面向功率和面积效率的全集成频率合成器能够在2.4 GHz范围内提供可编程输出频率，同时占用较小的硅面积。该全收发器采用标准的0.18μm射频互补金属氧化物半导体（CMOS）技术实现，芯片面积为0.5mm²（包括QFN封装焊盘在内为1.2mm²）。测量结果表明，该设计能够在幅移键控（ASK）/开关键控（OOK）和频移键控（FSK）模式下工作，数据速率高达500 kbps。在1.8 V电源电压下，接收器、发射器和频率合成器的输入灵敏度为-60 dBm，输出功率为3 dBm，功耗分别为2.3 mW、4.8 mW和3.9 mW。
