Multi-Way Quasi-Optical Waveguide Power Divider with 2D Diffraction Approximation and Experimental Verification at Millimeter Wave
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In this paper, multi-way quasi-optical parallel-plate waveguide power dividers/combiners are designed and fabricated using the 2D diffraction approximation. Shape optimization technology is applied to shape the cylindrical reflector surface to reconstruct the diffraction field to improve the magnitude and phase balance of the parallel-plate waveguide power dividers. Both a 1-to-6 way quasi-optical waveguide power divider with H-plane horn antenna array and a 1-to-10 way power divider with gap waveguide transition are analyzed and designed, respectively. We fabricated the two designed power devices at millimeter wave for verifying the validity of the design method. The measured average transmission coefficient of the 1-to-6 way power divider is − 10.8 dB from 81 to 110 GHz, corresponding to 50% power combining efficiency, while the measured back-to-back structure of the 1-to-10 way power divider/combiner features an average transmission coefficient to − 2.83 dB corresponding to 72.2% power combining efficiency over the entire W-band. The proposed power dividers/combiners and the efficient optimization method used in their design are believed to be of importance for future power device applications in millimeter wave and terahertz range.
KeywordsPower divider/combiner Quasi-optics Diffraction Magnitude and phase balance Shape optimization technology Millimeter wave Terahertz
The work for this grant was supported in part by National Natural Science Foundation of China (Grant No: 61771094) and by Sichuan Science and Technology Program (Grant No: 2019JDRC0008).
- 2.M. Mattsson, O. Zeni and M. Simkó. “Is there a biological basis for therapeutic applications of millimetre waves and THz waves?”, J. Infrared Millim. Terahertz Waves, 2018.Google Scholar
- 6.P. F. Goldsmith, “Quasioptical Systems:Gaussian Beam Quasioptical Propogation and Applications”, Wiley-IEEE Press, 1998.Google Scholar
- 7.S.A. Kuznetsov, M.A. Astafev, M. Beruete, and M. Navarro-Cía, “Planar Holographic Metasurfaces for Terahertz Focusing,” Scientific Reports, vol. 5, no. 7738, pp. 1-8, Jan. 2015.Google Scholar
- 9.Al Abbas, Emad, and A. M. Abbosh. “Tunable millimeter-wave power divider for future 5G cellular networks,” Antennas and Propagation (APSURSI), 2016 IEEE International Symposium on. IEEE, 2016.Google Scholar
- 11.K. S. Reichel, R. Mendis, and D. M. Mittleman, “A broadband terahertz waveguide T-junction variable power splitter,” Sci. Rep., no. 6, pp. 1–6 Jun. 2016.Google Scholar
- 18.T. Magath, R. Judaschke, K. Schunemann, “2-D quasi-optical power combining oscillator array at D-band,” Microwave Symposium Diqest, 2006. IEEE MTT-S International, pp. 634–637, 2006.Google Scholar
- 20.F. Zhang, K. Song, M. Fan, S. Hu and Y. Fan, “A bionic algorithm based synthesis of shaped reflector for a terahertz quasi-optical power combiner,” In Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), 2016 IEEE MTT-S International Microwave Workshop Series on, pp. 1–3, 2016.Google Scholar
- 21.F. Zhang, K. Song, Y. Fan, “Real-Coded Genetic Algorithm with Differential Evolution Operator for Terahertz Quasi-Optical Power Divider/Combiner Design”, Applied Computational Electromagnetics Society Journal, vol. 32, no. 10, Oct. 2017.Google Scholar