Lee Hyeonseok, Trinh Van-Son, Park Jung-Dong
Division of Electronics and Electrical Engineering, Dongguk University, Seoul 04620, Korea.
Sensors (Basel). 2022 Apr 19;22(9):3114. doi: 10.3390/s22093114.
We present a W-band 8-way wideband power amplifier (PA) for a high precision frequency modulated continuous wave (FMCW) radar in 65-nm CMOS technology. To achieve a broadband operation with an improved output power for a high range resolution and high distance coverage of FMCW radar sensors, a balanced architecture is employed with the Lange coupler which naturally combines the output powers from two 4-way push-pull PAs. By utilizing a transformer-based push-pull structure with a cross-coupled capacitive neutralization technique, the gate-drain capacitance of the 4-way PA is compensated for the stabilization with an improved power gain. Interstage matching was performed with transformers for a reduced loss from the matching network and minimal area occupation. The implemented balanced 8-way PA achieved a saturated output power () of 16.5 dBm, a 1-dB compressed output power (OP) of 13.3 dBm, a power-added efficiency (PAE) of 9.9% at 90 GHz and 3-dB power bandwidth was 20.4 GHz (79.2-99.6 GHz).
我们展示了一款采用65纳米CMOS技术、用于高精度调频连续波（FMCW）雷达的W波段八路宽带功率放大器（PA）。为了实现宽带运行，同时提高输出功率，以实现FMCW雷达传感器的高距离分辨率和高距离覆盖范围，采用了一种平衡架构，其中使用了兰格耦合器，它自然地组合了两个四路推挽式功率放大器的输出功率。通过利用基于变压器的推挽结构和交叉耦合电容中和技术，四路功率放大器的栅漏电容得到补偿，从而实现稳定并提高功率增益。级间匹配采用变压器进行，以降低匹配网络的损耗并减少占用面积。所实现的平衡八路功率放大器在90吉赫兹时实现了16.5分贝毫瓦的饱和输出功率（）、13.3分贝毫瓦的1分贝压缩输出功率（OP）、9.9%的功率附加效率（PAE），3分贝功率带宽为20.4吉赫兹（79.2 - 99.6吉赫兹）。
