A design-automation framework from the Emerging Radio Systems Group has been published in IEEE Transactions on Microwave Theory and Techniques. It removes the predefined circuit template from broadband power amplifier design: the input and output matching networks are represented as graphs and evolved in both topology and parameter space, then translated automatically into manufacturable, electromagnetically aware layouts.
The framework was validated by designing and fabricating a 10 W GaN power amplifier covering 3.2 to 4.3 GHz, with 1 GHz of instantaneous modulation bandwidth across the 5G NR n77 band. The prototype reaches a peak output power of 41.6 ± 0.8 dBm and a peak power-added efficiency between 40% and 63% across the band. Driven with a 1 GHz 256-QAM OFDM signal at a 9 dB peak-to-average power ratio, it achieves an adjacent channel power ratio of −52.7 dBc and an error vector magnitude of 0.66% after digital predistortion using a complexity-reduced Volterra-series model.
The work is by Yuxuan Chen, Hang Yu, Zi Jun Su and Slim Boumaiza.
Citation
Y. Chen, H. Yu, Z. J. Su and S. Boumaiza, “Automated Broadband Power Amplifier Design via Circuit-Graph Evolution and Layout-Aware Synthesis,” IEEE Transactions on Microwave Theory and Techniques, early access, pp. 1–16, Aug. 2026, doi: 10.1109/TMTT.2026.3724479. Read it on IEEE Xplore →