In this paper a four mode 130 nm RF CMOS power amplifier (PA) in a single propagation path topology is presented and evaluated with IEEE 802.11ax signals. Specifically, this configuration is supported by three main concepts: scaling of the supply voltage, consecutive voltage amplifications and selection of the operation modes of transistors (saturation or triode). The concept is tested at 2.4 GHz and the obtained post-layout simulation results are reported. The four efficiency profiles of the proof-of-concept are: N4S3A1 (common-source), low-power (N4S2A2), medium-power (N4S1A3), and high-power (N4S0A4). For each of those modes the 1 dB output compression point (OCP\(_\text {1dB}\)) and the power added efficiency (PAE) at OCP\(_\text {1dB}\) are evaluated with the following results, respectively: 17.5 dBm and 23 % (N4S3A1); 16.8 dBm and 28.1 % (N4S2A2), 18.1 dBm and 28.9 % (N4S1A3), and 19.9 dBm and 25.7 % (N4S0A4). In terms of process–voltage–temperature analysis, the worst and best performances obtained for OCP\(_\text {1dB}\) and PAE at OCP\(_\text {1dB}\) are: 13.9 dBm and 16.8 dBm, 13.6 % and 29.3 % (N4S3A1); 15.4 dBm and 19.3 dBm, 20.3 dBm and 40.7 % (N4S2A2); 16.7 dBm and 19.3 dBm, 21.7 % and 36.6 % (N4S1A3); 19.2 and 21.2, 18.9 % and 36 % (N4S0A4). As for IEEE 802.11ax signals under 16 QAM operation (MCS4), the PA performs an output power at limit EVM (-19 dB) for modes N4S3A1, N4S2A2, N4S1A3, and N4S0A4 of: 14.7 dBm, 15.3 dBm, 16.7 dBm, and 17.8 dBm.

在本文中，介绍了一种采用 IEEE 802.11ax 信号的单传播路径拓扑结构中的四模式 130 nm RF CMOS 功率放大器 (PA)。具体来说，这种配置由三个主要概念支持：电源电压的缩放、连续电压放大和晶体管（饱和或三极管）操作模式的选择。该概念在 2.4 GHz 下进行测试，并报告获得的布局后仿真结果。概念验证的四个效率配置文件是：N4S3A1（共源）、低功率 (N4S2A2)、中功率 (N4S1A3) 和高功率 (N4S0A4)。对于这些模式中的每一种，1 dB 输出压缩点 (OCP \(_\text {1dB}\) ) 和OCP \(_\text {1dB}\) 处的功率附加效率 (PAE )分别用以下结果进行评估：17.5 dBm 和 23 % (N4S3A1)；16.8 dBm 和 28.1 % (N4S2A2)、18.1 dBm 和 28.9 % (N4S1A3) 以及 19.9 dBm 和 25.7 % (N4S0A4)。在工艺-电压-温度分析方面，OCP \(_\text {1dB}\)和 PAE 在 OCP \(_\text {1dB}\) 下获得的最差和最佳性能分别为：13.9 dBm 和 16.8 dBm， 13.6 % 和 29.3 % (N4S3A1)；15.4 dBm 和 19.3 dBm、20.3 dBm 和 40.7 % (N4S2A2)；16.7 dBm 和 19.3 dBm，21.7 % 和 36.6 % (N4S1A3)；19.2 和 21.2、18.9 % 和 36 % (N4S0A4)。对于 16 QAM 操作 (MCS4) 下的 IEEE 802.11ax 信号，对于模式 N4S3A1、N4S2A2、N4S1A3 和 N4S0A4，PA 在极限 EVM (-19 dB) 下执行输出功率：14.7 dBm、15.3 dBm、16.7 dBm 和 N4S0A4 17.8 分贝米。