A fifth-generation (5G) frequency range 2 (FR2) transmitter front end with a fully integrated power detector for enabling closed-loop power control is presented. The power detection path includes a miniature broad-side directional coupler, a sense pair, and a current-mode successive approximation analog-to-digital converter. The stacked power amplifier (PA) implemented in a 28-nm CMOS silicon on insulator (SOI) process delivers 12.5-dBm output power with a power-added efficiency of 10% and an error vector magnitude (EVM) lower than −25 dB with a CP-OFDM/64-QAM/400-MHz bandwidth signal. The PA supports 5G frequency bands n257/n258/n261 covering a frequency range from 24.25 to 29.5 GHz. With a matched output load, the power detector has less than ±0.15-dB error over a 15-dB power dynamic range and 85° temperature range.

中文翻译：

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具有用于闭环 EIRP 控制的集成功率检测器的 5G FR2 功率放大器


提出了第五代 (5G) 频率范围 2 (FR2) 发射机前端，带有完全集成的功率检测器，可实现闭环功率控制。功率检测路径包括微型宽边定向耦合器、传感对和电流模式逐次逼近模数转换器。采用 28 nm CMOS 绝缘体上硅 (SOI) 工艺实现的堆叠式功率放大器 (PA) 可提供 12.5 dBm 输出功率，功率附加效率为 10%，误差矢量幅度 (EVM) 低于 -25 dB CP-OFDM/64-QAM/400-MHz 带宽信号。 PA支持5G频段n257/n258/n261，频率范围为24.25至29.5 GHz。在匹配输出负载的情况下，功率检测器在 15dB 功率动态范围和 85° 温度范围内的误差小于 ±0.15dB。