Abstract
A novel method is proposed to extend the output power back-off (OPBO) range of the Doherty power amplifier (DPA). This study reveals that the OPBO range of the DPA can be extended by tuning the output impedance of the peaking stage away from infinity and changing the phase delay of the output matching network of the carrier power amplifier. Based on this theory, a large-OPBO-range high-efficiency asymmetrical DPA working band from 1.55 to 2.2 GHz (35% relative bandwidth) is designed to verify the proposed method. Experimental results show that the DPA operates from 1.6 to 2.1 GHz. The range of the measured efficiency is 42.2%–52.1% in the OPBO state and 47%–62.7% in the saturation state. The OPBO range is 11.1–13.2 dB.
摘要
提出一种扩展Doherty功率放大器(DPA)输出功率回退(OPBO)范围的新方法。研究表明, 可以通过峰值路功放的输出阻抗来调整和改变载波功率放大器输出匹配网络的相位, 来扩大DPA的输出功率回退量。基于此理论, 设计了一个工作频带为1.55–2.2 GHz(35%相对带宽)、具有大输出功率回退范围的高效率非对称DPA, 通过这一例子来验证所提方法的有效性。实验结果表明, DPA工作频率为1.6–2.1 GHz。OPBO状态下测量效率范围为42.2%–52.1%, 饱和状态下为47%–62.7%。OPBO范围为11.1–13.2 dB。
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Data availability
The data that support the findings of this study are available from the corresponding author upon reasonable request.
References
Andersson CM, Gustafsson D, Yamanaka K, et al., 2012. Theory and design of class-J power amplifiers with dynamic load modulation. IEEE Trans Microw Theory Techn, 60(12):3778–3786. https://doi.org/10.1109/TMTT.2012.2221140
Bolotov AO, Kholyukov RG, Varlamov OV, 2018. EER power amplifier modulator efficiency improvement using PWM with additional sigma-delta modulation. Systems of Signal Synchronization, Generating and Processing in Telecommunications, p.1–4. https://doi.org/10.1109/SYNCHROINFO.2018.8456955
Chung A, Rejeb MB, Darwish A, et al., 2018. Frequency doubler based outphasing system for millimeter wave vector signal generation. 15th European Radar Conf, p.449–452. https://doi.org/10.23919/EuRAD.2018.8546541
Cidronali A, Mercanti M, Giovannelli NÒ, et al., 2013. On the signal probability distribution conscious characterization of GAN devices for optimum envelope tracking PA design. IEEE Microw Wirel Compon Lett, 23(7):380–382. https://doi.org/10.1109/LMWC.2013.2262929
Darraji R, Ghannouchi FM, Hammi O, 2011. A dual-input digitally driven Doherty amplifier architecture for performance enhancement of Doherty transmitters. IEEE Trans Microw Theory Techn, 59(5):1284–1293. https://doi.org/10.1109/TMTT.2011.2106137
de Falco PE, Mimis K, Ben-Smida S, et al., 2018. Single-ended branch PA characterisation for outphasing amplifiers. 13th European Microwave Integrated Circuits Conf, p.178–181. https://doi.org/10.23919/EuMIC.2018.8539963
Fang XH, Cheng KKM, 2014. Extension of high-efficiency range of Doherty amplifier by using complex combining load. IIEEE Trans Microw Theory Techn, 62(9):2038–2047. https://doi.org/10.1109/TMTT.2014.2333713
Fang XH, Liu HY, Cheng KKM, et al., 2018. Two-way Doherty power amplifier efficiency enhancement by incorporating transistors’ nonlinear phase distortion. IEEE Trans Microw Theory Techn, 28(2):168–170. https://doi.org/10.1109/LMWC.2017.2783845
Gustafsson D, Andersson CM, Fager C, 2013. A modified Doherty power amplifier with extended bandwidth and reconfigurable efficiency. IEEE Trans Microw Theory Techn, 61(1):533–542. https://doi.org/10.1109/TMTT.2012.2227783
Hallberg W, Özen M, Gustafsson D, et al., 2016. A Doherty power amplifier design method for improved efficiency and linearity. IEEE Trans Microw Theory Techn, 64(12):4491–4504. https://doi.org/10.1109/TMTT.2016.2617882
Hasin MR, Kitchen J, 2019. Exploiting phase for extended efficiency range in symmetrical Doherty power amplifiers. IEEE Trans Microw Theory Techn, 67(8):3455–3463. https://doi.org/10.1109/TMTT.2019.2921366
Iwamoto M, Williams A, Chen PF, et al., 2001. An extended Doherty amplifier with high efficiency over a wide power range. IEEE Trans Microw Theory Techn, 49(12):2472–2479. https://doi.org/10.1109/22.971638
Kim B, Kim J, Kim I, et al., 2006. The Doherty power amplifier. IEEE Microw Mag, 7(5):42–50. https://doi.org/10.1109/MW-M.2006.247914
Kliks A, Kulacz L, Kryszkiewicz P, et al., 2020. Beyond 5G: big data processing for better spectrum utilization. IEEE Veh Technol Mag, 15(3):40–50. https://doi.org/10.1109/MVT.2020.2988415
Koenig S, Lopez-Diaz D, Antes J, et al., 2013. Wireless sub-THz communication system with high data rate. Nat Photon, 7(12):977–981. https://doi.org/10.1038/nphoton.2013.275
Lee J, Son J, Kim B, 2014. Optimised Doherty power amplifier with auxiliary peaking cell. Electron Lett, 50(18):1299–1301. https://doi.org/10.1049/el.2014.2214
Lee SC, Paek JS, Jung JH, et al., 2015. 2.7 A hybrid supply modulator with 10dB ET operation dynamic range achieving a PAE of 42.6% at 27.0dBm PA output power. IEEE Int Solid-State Circuits Conf Digest of Technical Papers, p.1–3. https://doi.org/10.1109/ISSCC.2015.7062916
Lehna R, Bangert A, 2016. Novel output combiner for three-way Doherty power amplifiers. 11th European Microwave Integrated Circuits Conf, p.137–140. https://doi.org/10.1109/EuMIC.2016.7777509
Li C, You F, Peng J, et al., 2020. Co-design of matching sub-networks to realize broadband symmetrical Doherty with configurable back-off region. IEEE Trans Circ Syst II Expr Briefs, 67(10):1730–1734. https://doi.org/10.1109/TCSII.2019.2946395
Li M, Li Z, Zheng Q, et al., 2022. A 17–26.5 GHz 42.5 dBm broadband and highly efficient gallium nitride power amplifier design. Front Inform Technol Electron Eng, 23(2):346–350. https://doi.org/10.1631/FITEE.2000513
Liu X, Lv GS, Wang DH, et al., 2020. Energy-efficient power amplifiers and linearization techniques for massive MIMO transmitters: a review. Front Inform Technol Electron Eng, 21(1):72–96. https://doi.org/10.1631/FITEE.1900467
Mustafa AK, Bassoo V, Faulkner M, 2009. Reducing the drive signal bandwidths of EER microwave power amplifiers. IEEE MTT-S Int Microwave Symp Digest, p.1525–1528. https://doi.org/10.1109/MWSYM.2009.5165999
Nghiem XA, Negra R, 2014. Novel design of a 10 dB backoff broadband sequential Doherty power amplifier for wireless applications. IEEE Topical Conf on Power Amplifiers for Wireless and Radio Applications, p.22–24. https://doi.org/10.1109/PAWR.2014.6825735
Özen M, Andersson K, Fager C, 2016. Symmetrical Doherty power amplifier with extended efficiency range. IEEE Trans Microw Theory Techn, 64(4):1273–1284. https://doi.org/10.1109/TMTT.2016.2529601
Pang JZ, He SB, Dai ZJ, et al., 2016. Design of a post-matching asymmetric Doherty power amplifier for broadband applications. IEEE Microw Wirel Compon Lett, 26(1):52–54. https://doi.org/10.1109/LMWC.2015.2505651
Sen B, 2018. A 60W class S and outphasing hybrid digital transmitter for wireless communication. IEEE Topical Conf on RF/Microwave Power Amplifiers for Radio and Wireless Applications, p.8–11. https://doi.org/10.1109/PAWR.2018.8310053
Suo HL, Bao JF, 2008. Three-way Doherty power amplifier with uneven power drive. 11th IEEE Int Conf on Communication Technology, p.293–296. https://doi.org/10.1109/ICCT.2008.4716245
Tajima Y, Wandrei D, Schultz QS, et al., 2017. Improved efficiency in outphasing power amplifier by mixing out-phasing and amplitude modulation. IEEE Topical Conf on RF/Microwave Power Amplifiers for Radio and Wireless Applications, p.55–58. https://doi.org/10.1109/PAWR.2017.7875572
Tan C, Liu SW, Jia JB, et al., 2020. A wideband electrical impedance tomography system based on sensitive bioimpedance spectrum bandwidth. IEEE Trans Instrum Meas, 69(1):144–154. https://doi.org/10.1109/TIM.2019.2895929
Vijarnstit P, Maneekut R, Kaewplung P, 2015. A flexible fiber access network using superchannel coherent optical orthogonal frequency division multiplexing. 17th Int Conf on Advanced Communication Technology, p.319–322. https://doi.org/10.1109/ICACT.2015.7224812
Wei LL, Hu RQ, Qian Y, et al., 2014. Key elements to enable millimeter wave communications for 5G wireless systems. IEEE Wirel Commun, 21(6):136–143. https://doi.org/10.1109/MWC.2014.7000981
Zhou XY, Zheng SY, Chan WS, et al., 2018. Postmatching Doherty power amplifier with extended back-off range based on self-generated harmonic injection. IEEE Trans Microw Theory Techn, 66(4):1951–1963. https://doi.org/10.1109/TMTT.2017.2784811
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Mingyu LI, Xiaobing CHENG, and Zhijiang DAI designed the research. Xiaobing CHENG drafted the paper. Kang ZHONG, Tianfu CAI, and Chaoyi HUANG helped organize the paper. Zhijiang DAI revised and finalized the paper.
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Mingyu LI, Xiaobing CHENG, Zhijiang DAI, Kang ZHONG, Tianfu CAI, and Chaoyi HUANG declare that they have no conflict of interest.
Project supported by the National Natural Science Foundation of China (Nos. 62001061 and 62171068), the Science and Technology Research Program of Chongqing Municipal Education Commission (No. KJQN201900621), and the Natural Science Foundation of Chongqing, China (No. cstc2020jcyj-msxmX0129)
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Li, M., Cheng, X., Dai, Z. et al. A novel method for extending the output power back-off range of an asymmetrical Doherty power amplifier. Front Inform Technol Electron Eng 24, 470–479 (2023). https://doi.org/10.1631/FITEE.2200250
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DOI: https://doi.org/10.1631/FITEE.2200250