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A Low-Power Fullband 802.11a/b/g WLAN Transceiver With On-Chip PA
一款低功耗全频段802.11a/b/g WLAN收发器，采用0.15μm CMOS工艺，集成片上PA。
0.15μm CMOS, 1.8V, 54Mb/s, 20dBm P1-dB
低功耗WLAN收发器片上PACMOS
▸创新点1：零中频架构（Zero-IF）的系统创新，通过消除中频级简化了接收机结构，降低了功耗（117/135 mW），同时实现了4.4/4 dB的低噪声系数，显著提升了便携设备的能效比。
▸创新点2：新型I/Q补偿方案的方法创新，在本地振荡器（LO）中实现，解决了零中频架构的I/Q失配问题，实测图像抑制比优于52 dB，大幅提升了信号完整性。
▸创新点3：片上PA设计的电路创新，采用0.15μm CMOS工艺集成20 dBm输出P1-dB的功率放大器，突破了传统外置PA的限制，实现了高集成度（全片内设计）与宽温工作（-40至140°C）的兼容性。
▸创新点4：多频段（2.4/5 GHz）全兼容的系统创新，通过统一架构支持802.11a/b/g标准，在54 Mb/s速率下分别实现-72/-74 dBm的接收灵敏度，兼顾了性能与协议灵活性。
Abstract
A low-power fullband 802.11a/b/g WLAN trans- ceiver in 0.15- m CMOS technology is described. The zero-IF transceiver achieves a receiver noise figure of 4.4/4 dB for the 2.4-GHz/5-GHz bands, respectively. The corresponding sensitivity at 54-Mb/s operation is 72 dBm for 802.11g and 74 dBm for 802.11a using actual PER measurement. An on-chip PA delivers 20 dBm output P1-dB. A new I/Q compensation scheme is imple- mented in local oscillator (LO) and an image rejection of better than 52 dB is observed. The transmitter delivers 10/1.5 dBm (2.4-/5-GHz) EVM-compliant output power for a 64-QAM OFDM signal at 54-Mb/s. The power consumption is 117/135 mW (1.8-V) in the receive mode and 570/233.1 mW in the transmit mode for 2.4/5 GHz, respectively. The low power consumption, high integration and robustness ( 40 to 140 C) make this transceiver suitable for portable applications.