volume | PIER Journals

Abstract

An interference on a concurrent 4.5-/8.5-GHz-band operation has been effectively suppressed by applying a duplexer technique to high-efficiency GaN HEMT power amplifiers. Each harmonic was also suppressed by a harmonic reactive termination used for a high-efficiency operation. The developed concurrent dual-band amplifier delivered a 73% drain efficiency and a 61% power-added-efficiency (PAE) with 32 dBm output power at 8.24 GHz and a 69% drain efficiency and a 64% PAE with 37 dBm output power at 4.70 GHz. Undesired cross-modulation and intermodulation signals at nearby bands occurring due to dual-band interaction have been successfully suppressed to less than -41 dBc.

1. Raab, F., "Class-F power amplifiers with maximally flat waveforms," IEEE Trans. Microw. Theory Techn., Vol. 45, No. 11, 2007-2012, 2007.
doi:10.1109/22.644215 Google Scholar

2. Sokal, N. and A. Sokal, "Class E --- A new class of high-efficiency tuned single-ended switching power amplifiers," IEEE J. Solid-State Circuits, Vol. SSC-10, No. 3, 168-176, 1975.
doi:10.1109/JSSC.1975.1050582 Google Scholar

3. Wright, P., J. Lees, J. Benedikt, P. J. Tasker, and S. C. Cripps, "A methodology for realizing high efficiency class-J in a linear and broadband PA," IEEE Trans. Microw. Theory Techn., Vol. 57, No. 12, 3196-3204, 2009.
doi:10.1109/TMTT.2009.2033295 Google Scholar

4. Kamiyama, M., R. Ishikawa, and K. Honjo, "5.65 GHz high-efficiency GaN HEMT power amplifier with harmonics treatment up to fourth order," IEEE Microw. Wireless Compon. Lett., Vol. 22, No. 6, 315-317, 2012.
doi:10.1109/LMWC.2012.2197385 Google Scholar

5. Enomoto, J., R. Ishikawa, and K. Honjo, "Second harmonic treatment technique for bandwidth enhancement of GaN HEMT amplifier with harmonic reactive terminations," IEEE Trans. Microw. Theory Techn., Vol. 65, No. 12, 4947-4952, 2017.
doi:10.1109/TMTT.2017.2704931 Google Scholar

6. Rawat, K. and F. M. Ghannouchi, "Dual-band matching technique based on dual-characteristic impedance transformers for dual-band power amplifiers design," IET Microw., Antennas Propag., Vol. 5, No. 14, 1720-1729, 2011.
doi:10.1049/iet-map.2011.0099 Google Scholar

7. Ji, S. H., C. S. Cho, J. W. Lee, and J. Kim, "Concurrent dual-band class-E power amplifier using composite right/left-handed transmission line," IEEE Trans. Microw. Theory Techn., Vol. 55, No. 6, 1341-1347, 2007.
doi:10.1109/TMTT.2007.895236 Google Scholar

8. Enomoto, J., R. Ishikawa, and K. Honjo, "A 2.1/2.6 GHz dual-band high-efficiency GaN HEMT amplifier with harmonic reactive terminations," Proc. European Microw. Conf., 1488-1491, 2014. Google Scholar

9. Takayama, Y., K. Uchida, T. Fujita, and K. Maenaka, "Microwave dual-band power amplifiers using two-frequency matching," Electron. Commun. Jpn. Part II Electron., Vol. 89, No. 5, 17-24, 2006.
doi:10.1002/ecjb.20234 Google Scholar

10. Enomoto, J., H. Nishizawa, R. Ishikawa, Y. Takayama, and K. Honjo, "Parallel combination of high-efficiency amplifiers with spurious rejection for concurrent multiband operation," Proc. European Microw. Conf., 1075-1078, 2016. Google Scholar

11. Ishikawa, R., Y. Takayama, and K. Honjo, "Concurrent dual-band access GaN HEMT MMIC amplifier suppressing inter-band interference," IEEE Int. Microw. Symp. Dig., 2045-2048, 2017. Google Scholar

12. Wu, P.-S., T.-W. Huang, and H. Wang, "An 18-71 GHz multi-band and high gain GaAs MMIC medium power amplifier for millimeter-wave applications," IEEE MTT-S Int. Microw. Symp. Dig., 863-865, 2003. Google Scholar

13. Lin, Y.-T. and S.-S. Lu, "A 2.4/3.5/4.9/5.2/5.7-GHz concurrent multi-band low noise amplifier using InGaP/GaAs HBT technology," IEEE Microw. Wireless Compon. Lett., Vol. 14, No. 10, 463-465, 2004.
doi:10.1109/LMWC.2004.834548 Google Scholar

14. Maas, S. A., Nonlinear Microwave and RF Circuits, 2nd Ed., Artech House, 2003.

15. Maruyama, A., Y. Takayama, R. Ishikawa, and K. Honjo, "Linearity improvement for single-GaN HEMT dual-band power amplifier in concurrent operation mode," Proc. Asia-Pacific Microw. Conf., 995-998, 2017. Google Scholar

16. Gao, S., Z. Wang, and C.-W. Park, "Concurrent dual-band power amplifier with second harmonic controlled by gate and drain bias circuit," Proc. IEEE Int. Conf. Microw. Tech. and Computational Electromagnetics, 309-312, 2011. Google Scholar

17. Liu, R., D. Schreurs, W. D. Raedt, F. Vanaverbeke, and R. Mertens, "Concurrent dual-band power amplifier with different operation modes," IEEE Int. Microw. Symp. Dig., 2011, DOI: 10.1109/MWSYM.2011.5972698. Google Scholar

18. Chen, X., W. Chen, F. M. Ghannouchi, and Z. Feng, "A novel design method of concurrent dual-band power amplifiers including impedance tuning at inter-band modulation frequencies," IEEE Int. Microw. Symp. Dig., 2013, DOI: 10.1109/MWSYM.2013.6697505. Google Scholar

19. Zhu, S.-K., H.-P. Fu, H.-F. Wu, and J.-G. Ma, "A highly e±cient concurrent dual-band class-F power amplifier for applications at 1.7 and 2.14 GHz," IEEE Int. Microw. Symp. Dig., 2015, DOI: 10.1109/MWSYM.2015.7166915. Google Scholar

20. Pang, J., S. He, C. Huang, Z. Dai, C. Li, and J. Peng, "A novel design of concurrent dual-band high efficiency power amplifiers with harmonic control circuits," IEEE Microw. Wireless Compon. Lett., Vol. 26, No. 2, 137-139, 2016.
doi:10.1109/LMWC.2016.2517334 Google Scholar

21. Li, Y., B. J. Montgomery, and N. M. Neihart, "Development of a concurrent dual-band switch-mode power amplifier based on current-switching class-D configuration," Proc. IEEE 17th Annual Wireless and Microw. Tech. Conf., 2016, DOI: 10.1109/WAMICON.2016.7483846. Google Scholar

Dr. Haruka Nishizawa

Dr. Yoichiro Takayama

Dr. Ryo Ishikawa

Dr. Kazuhiko Honjo