volume | PIER Journals

Abstract

This paper presents a high-efficiency Ka-band solid-state power combining amplifier on the basis of a novel waveguide magic tee. By employing 16 low-power amplifier modules and compact waveguide power combining network with a low loss microstrip-to-waveguide transition, the output loss of the combining circuit is minimized, so a high combining efficiency larger than 85% from 34 to 36 GHz is obtained. Modular architecture is adopted in the combiner design. The single amplifier, bias circuit and heat sink are all fabricated separately, which add great flexibility to the system. Modular amplifiers can be premade and reserved in case any malfunctioning amplifier needs to be replaced. In addition, the improved power combining amplifier has the advantages of low loss, high isolation, compact structure, excellent heat-sink, etc.

1. Epp, L. W., D. J. Hoppe, A. R. Khan, and S. L. Stride, "A high-power Ka-band (31-36 GHz) solid-state amplifier based on low-loss corporate waveguide combining," IEEE Trans. Microwave Theory Tech., Vol. 56, 1899-1908, 2008.
doi:10.1109/TMTT.2008.927299

2. Simons, R. N., E. G. Wintucky, J. D. Wilson, and D. A. Force, "Ultra-high power and e±ciency space traveling-wave tube ampli¯er power combiner with reduced size and mass for NASA missions," IEEE Trans. Microwave Theory Tech., Vol. 57, 582-588, 2009.
doi:10.1109/TMTT.2008.2012298

3. Delisio, M. P. and R. A. York, "Quasi-optical and spatial power combining," IEEE Trans. Microwave Theory Tech., Vol. 50, 929-936, 2002.
doi:10.1109/22.989975

4. Chang, K. and C. Sun, "Millimeter-wave power-combining techniques," IEEE Trans. Microwave Theory Tech., Vol. 83, 91-107, 1983.
doi:10.1109/TMTT.1983.1131443

5. Zhang, B., Y.-Z. Xiong, L. Wang, S. Hu, T.-G. Lim, Y.-Q. Zhuang, and L.-W. Li, "A D-band power amplifier with 30-GHz bandwidth and 4.5-dBm P_sat for high-speed communication system," Progress In Electromagnetics Research, Vol. 107, 161-178, 2010.
doi:10.2528/PIER10060806

6. Wong, S.-K., F. Kung, W. Lee, S. Maisurah, and M. N. B. Osman, "A wimedia compliant CMOS RF power amplifier for Ultra-wideband (UWB) transmitter," Progress In Electromagnetics Research, Vol. 112, 329-347, 2011.

7. Khan, P., L. Epp, and A. Silva, "A Ka-band wideband-gap solid-state power amplifier: Architecture identification," JPL, Pasadena, CA, Interplanetary Network Progress Rep., Vol. 42-162, 1-16, 2005.

8. Buoli, C., S. Fusaroli, V. M. Gadaleta, F. Morgia, and T. Turillo, "Microstrip to waveguide 3 dB power splitter/combiner on FR4 PCB up to 50 GHz," 2005 European Microwave Conference, 4-6, 2005.

9. Wang, L., J. Xu, L. Zhao, D. Ran, and M. Y.Wang, "A millimeter-wave solid-state power combining circuit based on branch-waveguide directional coupler," Proceedings 2010 International Symposium on Signals, Systems and Electronics, Vol. 1, 265-267, 2010.

10. Russell, K. J., "Microwave power combining techniques," IEEE Trans. Microwave Theory Tech., Vol. 27, 472-478, 1979.
doi:10.1109/TMTT.1979.1129651

11. Wu, H. and W.-B. Dou, "A rigorous analysis and experimental researches of waveguide magic tee at W band," Progress In Electromagnetics Research, Vol. 60, 131-142, 2006.
doi:10.2528/PIER05112904

12. Xie, X. Q., C. X. Zhao, and R. Diao, "A millimeter-wave power combining amplifier based on a waveguide-microstrip E-plane dual-probe four-way power combining network," Int. J. Infrared Milli. Waves, Vol. 29, 862-870, 2008.
doi:10.1007/s10762-008-9380-7

13. Aliakbarian, H., A. Enayati, G. A. E. Vandenbosch, and W. de Raedt, "Novel low-lost end-wall microstrip-to-waveguide splitter transition," Progress In Electromagnetics Research, Vol. 101, 75-96, 2010.
doi:10.2528/PIER09081805

14. Costanzo, S., "Synthesis of multi-step coplanar waveguide-to-microstrip transition," Progress In Electromagnetics Research, Vol. 113, 111-126, 2011.

Ms. Li Zhao

Dr. Jun Xu

Dr. Lei Wang

Prof. Mao-Yan Wang