A 5G Doherty Power Amplifier Design Using Two-Section Impedance Transfer Networks

Authors

DOI:

https://doi.org/10.14500/aro.12810

Keywords:

5G new radio applications, Branchline coupler, Compact design, Doherty power amplifier, Matching networks

Abstract

This paper introduces a simulation-based design study of a high-performance 2.6 GHz Doherty power amplifier (DPA) designed for 5G New Radio n7 and n38 frequency band applications. The proposed DPA incorporates a branch-line coupler, replacing conventional impedance inverter and impedance transformer networks. Furthermore, an innovative compact two-section impedance matching network is incorporated in the amplifier structure to reduce size and improve performance. This novel approach results in superior performance, particularly at high output power levels. A class-AB amplifier serves as the main stage, whereas a class-C amplifier functions as the auxiliary stage, ensuring efficient power utilization. Operating at 2.6 GHz, the proposed DPA demonstrates a drain efficiency of 45% and a maximum gain of 15 dB. In comparison with a typical DPA, the proposed design occupies 75% of the size, which shows a size reduction of 25%.

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Author Biography

Salah I. Yahya, Department of Computer Technology Engineering, College of Technical Engineering, Al-Hadba University, Mosul, Iraq

Salah I. Yahy is a Professor at the Department of Computer Technology Engineering, College of Technical Engineering, Al-Hadba University, Mosul, Iraq. He received the B.Sc. degree in electrical engineering, the M.Sc. degree in electronics and communication engineering, and the Ph.D. degree in communication and microwave engineering. He is a Consultant Engineer and a Senior Member of IEEE. His research interests include antenna design, numerical RF dosimetry, MW measurement, and MW components design.

References

Ahmed, M., Hue, X., Szymanowski, M., Uscola, R., Staudinger, J., and Kitchen, J., 2021. 2.6-GHz integrated LDMOS doherty power amplifier for 5G basestation applications. IEEE Microwave and Wireless Components Letters, 31(7), pp.881-884. DOI: https://doi.org/10.1109/LMWC.2021.3078699

Al-Majdi, K., and Mezaal, Y.S., 2023. New miniature narrow band microstrip diplexer for recent wireless communications. Electronics, 12(3), p.716. DOI: https://doi.org/10.3390/electronics12030716

Bo, C., Li, C., Hu, X., Zhai, X., Wei, K., Liu, X., and Luo, W., 2025. A monolithic d-mode gaN-based buck converter with novel resistor-capacitormultiplexing dead-time adjustment structure for envelope-tracking power amplifier application. IEEE Microwave and Wireless Technology Letters, 35, pp.1065-1068. DOI: https://doi.org/10.1109/LMWT.2025.3555257

Camarchia, V., Pirola, M., Quaglia, R., Jee, S., Cho, Y., and Kim, B., 2015. The doherty power amplifier: Review of recent solutions and trends. IEEE Transactions on Microwave Theory and Techniques, 63(2), pp.559-571. DOI: https://doi.org/10.1109/TMTT.2014.2387061

Chen, G., and Hamid, M., 1987. Two-section impedance transformer with arbitrary length. International Journal of Electronics, 63(6), pp.911-920. DOI: https://doi.org/10.1080/00207218708939197

Chen, W., Bassam, S.A., Li, X., Liu, Y., Rawat, K., Helaoui, M., Ghannouchi, F.M., and Feng, Z., 2011. Design and linearization of concurrent dual-band Doherty power amplifier with frequency-dependent power ranges. IEEE Transactions on Microwave Theory and Techniques, 59(10), pp.2537-2546. DOI: https://doi.org/10.1109/TMTT.2011.2164089

Chen, Y., Choi, W., Shin, J., Jeon, H., Bae, S., Bae, K., Song, J., Ju, Y., Oh, H., and Kang, H., 2025. Comprehensive analysis of coupled transmission lines for broadband high-efficiency doherty power amplifiers. IEEE Transactions on Microwave Theory and Techniques, 73, pp.4937-4953. DOI: https://doi.org/10.1109/TMTT.2025.3546727

Choi, H.J., Lim, J.S., and Jeong, Y.C., 2006. A new design of doherty amplifiers using defected ground structure. IEEE Microwave and Wireless Components Letters, 16(12), pp.687-689. DOI: https://doi.org/10.1109/LMWC.2006.885636

Choi, H., 2023. A doherty power amplifier for ultrasound instrumentation. Sensors (Basel), 23(5), p.2406. DOI: https://doi.org/10.3390/s23052406

Colantonio, P., Giannini, F., Giofrè, R., and Piazzon, L., 2009. The AB‐C doherty power amplifier. Part II: Validation. International Journal of RF and Microwave Computer‐Aided Engineering, 19(3), pp.307-316. DOI: https://doi.org/10.1002/mmce.20351

Doherty, W.H., 1936. A new high efficiency power amplifier for modulated waves. Proceedings of the Institute of Radio Engineers, 24(9), pp.1163-1182. DOI: https://doi.org/10.1109/JRPROC.1936.228468

Giofre, R., Colantonio, P., Giannini, F., and Piazzon, L., 2013. New output combiner for Doherty amplifiers. IEEE Microwave and Wireless Components Letters, 23(1), pp.31-33. DOI: https://doi.org/10.1109/LMWC.2012.2236308

Hayati, M., and Roshani, S., 2014. A novel miniaturized power amplifier with nth harmonic suppression. AEU-International Journal of Electronics and Communications, 68(10), pp. 1016-1021. DOI: https://doi.org/10.1016/j.aeue.2014.05.003

Huang, W., and Liu, J., 2024. High-efficiency class-F power amplifier based on double spiral defected ground structure. International Journal of Electronics, 111(3), pp.485-498. DOI: https://doi.org/10.1080/00207217.2022.2164078

Hussein, M.K., Nafee, A., Ahmed, M.G., Ragaai, H.F., and El-Nozahi, M., 2025. An 8-15 GHz doherty power amplifier with a compact quadraturehybrid-based output combiner in 22 nm FD-SOI. Electronics, 14(23), pp.4603. DOI: https://doi.org/10.3390/electronics14234603

Kim, J., Son, J., Moon, J., and Kim, B., 2010. A saturated Doherty power amplifier based on saturated amplifier. IEEE Microwave and Wireless Components Letters, 20(2), pp.109-111. DOI: https://doi.org/10.1109/LMWC.2009.2038554

Li, M., Pang, J., Li, Y., and Zhu, A., 2019. Ultra-wideband dual-mode Doherty power amplifier using reciprocal gate bias for 5G applications. IEEE Transactions on Microwave Theory and Techniques, 67(10), pp.4246-4259. DOI: https://doi.org/10.1109/TMTT.2019.2932977

Li, M., Pang, J., Li, Y., and Zhu, A., 2020. Bandwidth enhancement of Doherty power amplifier using modified load modulation network. IEEE Transactions on Circuits and Systems I Regular Papers, 67(6), pp.1824-1834. DOI: https://doi.org/10.1109/TCSI.2020.2972163

Liu, E., and Wang, H., 2024. 32.9 an ultra-compact 28GHz doherty power amplifier with an asymmetrically-coupled-transformer output combiner. In: 2024 IEEE International Solid-State Circuits Conference (ISSCC). IEEE, United States, pp.536-538. DOI: https://doi.org/10.1109/ISSCC49657.2024.10454274

Lu, H., Zhang, M., Yang, L., Hou, B., Martinez, R.P., Mi, M., Du, J., Deng, L., Wu, M., Chowdhury, S., Ma, X., and Hao, Y., 2025. A review of GaN RF devices and power amplifiers for 5G communication applications. Fundamental Research, 5(1), pp.315-331. DOI: https://doi.org/10.1016/j.fmre.2023.11.005

MahdiAbadi, S., Roshani, S., Parandin, F., and Roshani, S., 2024. Design of a miniaturized 90-degree quadrature hybrid coupler with harmonic suppression ability using π-shaped lumped elements. Scientific Reports, 14(1), pp.26489. DOI: https://doi.org/10.1038/s41598-024-78328-z

Mezaal, Y.S., Ghazi, H.S., and Khaleel, M.H., 2025. Compact diplexer based on SIR feeders, T-shaped resonators, and UIR components for mobile wireless systems. Journal of Electromagnetic Waves and Applications, 39(3), pp.344-359. DOI: https://doi.org/10.1080/09205071.2024.2449539

Monzon, C., 2002. Analytical derivation of a two-section impedance transformer for a frequency and its first harmonic. IEEE Microwave and Wireless Components Letters, 12(10), pp.381-382. DOI: https://doi.org/10.1109/LMWC.2002.804558

Moon, J., Kim, J., Kim, J., Kim, I., and Kim, B., 2010. Efficiency enhancement of Doherty amplifier through mitigation of the knee voltage effect. IEEE Transactions on Microwave Theory and Techniques, 59(1), pp.143-152. DOI: https://doi.org/10.1109/TMTT.2010.2091207

Nemati, H.M., Fager, C., Gustavsson, U., Jos, R., and Zirath, H., 2009. Design of varactor-based tunable matching networks for dynamic load modulation of high power amplifiers. IEEE Transactions on Microwave Theory and Techniques, 57(5), pp.1110-1118. DOI: https://doi.org/10.1109/TMTT.2009.2017257

Nikandish, G., Staszewski, R.B., and Zhu, A., 2020. Breaking the bandwidth limit: A review of broadband Doherty power amplifier design for 5G. IEEE Microwave Magazine, 21(4), pp.57-75. DOI: https://doi.org/10.1109/MMM.2019.2963607

Roshani, S., Yahya, S.I., Ghadi, Y.Y., Roshani, S., Parandin, F., and Yaghouti, B.D., 2023. Size reduction and harmonics suppression in microwave power dividers: A comprehensive review. Aro-the Scientific Journal of Koya University, 11(2), pp.122-136. DOI: https://doi.org/10.14500/aro.11385

Rubio, J.J.M., Camarchia, V., Pirola, M., and Quaglia, R., 2017. Design of an 87% fractional bandwidth Doherty power amplifier supported by a simplified bandwidth estimation method. IEEE Transactions on Microwave Theory and Techniques, 66(3), pp.1319-1327. DOI: https://doi.org/10.1109/TMTT.2017.2767586

Spagnolo, F., 2025. GaAs MMIC Technology Evaluation and Doherty Power Amplifier Design. Politecnico di Torino, Italy. Turalchuk, P., Filipiuk, I., and Iskakov, B., 2024. A dynamic load modulation power amplifier with ferroelectric-based tunable matching network. Sensors, 24(23), pp.7571. DOI: https://doi.org/10.3390/s24237571

Varma, V.S., Tharun, K., Varun, T., Sagar, S., and Raja, I., 2025. A fast transitioning power supply modulator of stepped envelope tracking for 5G/6G millimeter-wave applications in 65nm CMOS. In: 2025 IEEE International Symposium on Circuits and Systems (ISCAS). IEEE, United States, p1-5. DOI: https://doi.org/10.1109/ISCAS56072.2025.11043745

Xiao, M., and Zhang, W., 2025. A design and implementation of high-efficiency asymmetric doherty radio frequency power amplifier for 5G base station applications. Electronics, 14(8), p.1586. DOI: https://doi.org/10.3390/electronics14081586

Yang, S., and Ke, Y., 2025. Design of symmetrical broadband doherty power amplifier based on improved output matching circuit. In: 2025 4th International Conference on Electronic Information Technology (EIT). IEEE, United States, pp.23-26. DOI: https://doi.org/10.1109/EIT67313.2025.11232029

Zhang, H., Xia, J., Ni, Z., Ge, X., Kong, W., Zhang, W., Yu, C., and Zhu, X.W., 2024. Design of Doherty power amplifier with power back-off extension based on harmonic tuning and output combining network optimization. AEU-International Journal of Electronics and Communications, 187, pp.155528. DOI: https://doi.org/10.1016/j.aeue.2024.155528

Zhou, L.H., Zhou, X.Y., and Chan, W.S., 2022. A compact and broadband Doherty power amplifier without post-matching network. IEEE Transactions on Circuits and Systems II: Express Briefs, 70(3), pp.919-923. DOI: https://doi.org/10.1109/TCSII.2022.3218006

Zhou, X.Y., Chan, W.S., Chen, S., and Feng, W.J., 2020. Broadband highly efficient Doherty power amplifiers. IEEE Circuits and Systems Magazine, 20(4), pp.47-64. DOI: https://doi.org/10.1109/MCAS.2020.3027221

Zhou, X.Y., Chan, W.S., Zheng, S.Y., Feng, W., Liu, H.Y., Cheng, K.K.M., and Ho, D., 2019. A mixed topology for broadband high-efficiency doherty power amplifier. IEEE Transactions on Microwave Theory and Techniques, 67(3), pp.1050-1064. DOI: https://doi.org/10.1109/TMTT.2019.2893178

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Published

2026-09-17

How to Cite

Hazzazi, F. (2026) “A 5G Doherty Power Amplifier Design Using Two-Section Impedance Transfer Networks”, ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY, 14(2), pp. 40–52. doi: 10.14500/aro.12810.

Issue

Vol. 14 No. 2 (2026): Edition Twenty Seven

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Articles

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Copyright (c) 2026 Fawwaz Hazzazi, Salah I. Yahya, Reza Ebrahim Pourian, Ali Roshani, Saeid MahdiAbadi, Saeed Roshani, Sobhan Roshani

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Received 2025-12-31
Accepted 2026-08-07
Published 2026-09-17

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