volume | PIER Journals

Abstract

The available polarizers either cannot afford gigawatt-class high-power microwave applications or are large in length. In this letter, a novel grooved polarizer is proposed. The grooves are proposed to be created in an over-mode circular waveguide to improve the power capacity and bandwidth. Moreover, the symmetric elliptical grooves are adopted to suppress high-order modes and realize the desired phase difference. An X-band polarizer prototype is designed and manufactured with length of 91 mm. Simulated results show that the power capacity of the polarizer is more than 1.5 GW. Measured results in accordance with simulations show that the axial ratio is less than 3 dB from 8.6 to 12.2 GHz, with relative bandwidth of 34.6%. The measured return losses are better than -12.7 dB in the same frequency range.

1. Rahmat-Smaii, Y., D. W. Duan, D. V. Giri, and L. F. Libelo, "Canonical examples of reflector antennas for high-power microwave applications," IEEE Trans. Electromag. Compat., Vol. 34, 197-205, 1992.
doi:10.1109/15.155830 Google Scholar

2. Huang, J. and J. A. Encinar, Reflectarray Antennas, 2nd Ed., Wiley, Hoboken, NJ, USA, 2007.
doi:10.1002/9780470178775

3. Subbarao, B. and V. F. Fusco, "Compact coaxial-fed CP polarizer," IEEE Antennas and Wirel. Propag. Lett., Vol. 3, 145-147, 2004.
doi:10.1109/LAWP.2004.831084 Google Scholar

4. Bertin, G., B. Piovano, L. Accatino, and M. Mongiardo, "Full-wave design and optimization of circular waveguide polarizers with elliptical irises," IEEE Trans. Microwave Theory Tech., Vol. 50, 1077-1083, 2002.
doi:10.1109/22.993409 Google Scholar

5. Hung, P. H., W. Y. Chiang, and Y. C. Hsieh, "High performance and high power circularly polarized horn antenna for K-band microwave processing systems," Review of Scientific Instruments, Vol. 90, No. 1, 014707, 2019.
doi:10.1063/1.5045632 Google Scholar

6. Kim, I., J. M. Kovitz, and Y. Rahmat-Samii, "Enhancing the power capabilities of the stepped septum using an optimized smooth sigmoid profile," IEEE Antennas Propag. M., Vol. 56, No. 5, 16-42, 2014.
doi:10.1109/MAP.2014.6971913 Google Scholar

7. Wang, S. W., C. H. Chien, C. L. Wang, and R. B. Wu, "A circular polarizer designed with a dielectric septum loading," IEEE Trans. Microwave Theory Tech., Vol. 52, No. 7, 1719-1723, 2004.
doi:10.1109/TMTT.2004.830487 Google Scholar

8. Zhang, L., C. R. Donaldson, and W. He, "Design and measurement of a polarization convertor based on a truncated circular waveguide," J. Phys. D: Appl. Phys., Vol. 45, 345103, 2012.
doi:10.1088/0022-3727/45/34/345103 Google Scholar

9. Chang, C., S. Church, S. G. Tantawi, P. Voll, M. Sieth, and K. Devaraj, "Theory and experiment of a compact waveguide dual circular polarizer," Progress In Electromagnetics Research, Vol. 131, 211-225, 2012.
doi:10.2528/PIER12072601 Google Scholar

10. Yoneda, N., M. Miyazaki, H. Matsumura, and M. Yamato, "A design of novel grooved circular waveguide polarizers," IEEE Trans. Microwave Theory Tech., Vol. 48, 2446-2452, 2000.
doi:10.1109/22.898996 Google Scholar

11. Yoneda, N., M. Miyazaki, T. Horie, and H. Satou, "Mono-grooved circular waveguide polarizers," IEEE MTT-S Int. Microwave Symp. Dig., Vol. 2, 821-824, Seattle, WA, USA, 2002. Google Scholar

12. Shi, X. B., "Design for Ka-band couple circular polarization feed being possessed of receive and transmit,", Graduate School of Xi’an University of Technology, Xi’an, 2010. Google Scholar

Dr. Gexing Kong

Dr. Xianqiang Li

Dr. Qingfeng Wang

Professor Jianqiong Zhang