Chi, Taiyun2023-05-242023-05-242023-052023-03-31May 2023Zhang, Xiaohan. "A Millimeter-Wave Three-Way Doherty Power Amplifier for 5G NR OFDM." (2023) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/114891">https://hdl.handle.net/1911/114891</a>.https://hdl.handle.net/1911/114891We present a mmWave three-way Doherty output network and its silicon implementation at 38 GHz for 5G NR OFDM. The proposed network synthesis methodology can realize close-to-ideal dual-peaking Doherty active load mod ulation, reduce the impedance transformation ratio at back-off, and directly absorb the device parasitic capacitance. Its design procedure and trade-offs are discussed in detail. A 38-GHz PA prototype is implemented in the GlobalFoundries 45-nm CMOS SOI process, achieving 13.7% / 11.0% PAE at the 9.5-dB / 11.5-dB back-off, which are among the highest compared to recently reported silicon PAs operating at 30 GHz and above. Tested under 1-CC and 2-CC 5G NR FR2 64-QAM OFDM signals in the Band n260, the PA demonstrates state-of-the-art average output power(11.3 dBm) and average efficiency (14.7%) with -25 dB EVM. The design robustness and reliability is further demonstrated through the testing of multiple samples and PA lifetimeapplication/pdfengCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.5G NRDohertyefficiency enhancementload modulationmillimeter-wave (mmWave)OFDMpeak-to-average power ratio (PAPR)power amplifierpower back-offthree-way DohertyThesis2023-05-24