Low-power 2.4-GHz transceiver with passive RX front-end and 400-mV supply
Low-power 2.4-GHz transceiver with passive RX front-end and 400-mV supply
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DOI：
10.1109/jssc.2006.884801
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发表时间：
2006-12-01
影响因子：
5.4
通讯作者：
Pister, Kristofer S. J.
中科院分区：
文献类型：
--
作者：
Cook, Ben W.;Berny, Axel;Pister, Kristofer S. J.
推出了一款针对无线传感器网络应用的超低功耗 2.4-G-Hz 收发器。接收器前端是完全无源的，利用集成谐振匹配网络来实现电压增益并直接连接到无源混频器。该接收器实现了 7dB 噪声系数和 -7.5dBm IIP3，同时通过 400mV 电源消耗 330μW 功率。二进制 FSK 发射机向平衡 50Ω 负载提供 300 μW 功率，整体效率为 30%，功率放大器 (PA) 效率为 45%。分析了接收器拓扑的性能，并导出了无源混频器和匹配网络的增益和噪声系数的简单表达式。对无源混频器输入阻抗的分析揭示了在混频器输入处抑制干扰的潜力，其特性类似于以开关频率为中心的极高 Q 值并联 LC 滤波器。
An ultra low power 2.4-G-Hz transceiver targeting wireless sensor network applications is presented. The receiver front-end is fully passive, utilizing an integrated resonant matching network to achieve voltage gain and interface directly to a passive mixer. The receiver achieves a 7-dB noise figure and -7.5-dBm IIP3 while consuming 330 mu W from a 400-mV supply. The binary FSK transmitter delivers 300 mu W to a balanced 50-Omega load with 30% overall efficiency and 45% power amplifier (PA) efficiency. Performance of the receiver topology is analyzed and simple expressions for the gain and noise figure of both the passive mixer and matching network are derived. An analysis of passive mixer input impedance reveals the potential to reject interferers at the mixer input with characteristics similar to an extremely high-Q parallel LC filter centered at the switching frequency.