Vol. 72

Front:[PDF file] Back:[PDF file]
Latest Volume
All Volumes
All Issues
2017-03-17

Design of Wideband Quad-Ridged Waveguide Orthomode Transducer at L-Band

By Jin Fan, Yihua Yan, Chengjin Jin, Dezhi Zhan, and Ji-Run Luo
Progress In Electromagnetics Research C, Vol. 72, 115-122, 2017
doi:10.2528/PIERC17010802

Abstract

In this paper, an L-band wideband quad-ridged waveguide orthomode transducer (OMT) for the Five hundred meter Aperture Spherical radio Telescope (FAST) is presented with a simple design principle. By designing two critical parts of the OMT separately and introducing matching rings into two orthogonal probes, an improved wideband performance has been realized successfully. The OMT is designed to operate across the 0.95 GHz-1.9 GHz band, and the simulation shows a return loss better than -20 dB for both polarizations, cross-polarized isolation levels over 45 dB and insertion loss lower than 0.15 dB over the entire bandwidth. The measured results are in good agreement with the simulations.

Citation


Jin Fan, Yihua Yan, Chengjin Jin, Dezhi Zhan, and Ji-Run Luo, "Design of Wideband Quad-Ridged Waveguide Orthomode Transducer at L-Band," Progress In Electromagnetics Research C, Vol. 72, 115-122, 2017.
doi:10.2528/PIERC17010802
http://jpier.org/PIERC/pier.php?paper=17010802

References


    1. Bøifot, A. M., E. Lier, and T. Schaug-Pettersen, "Simple and broadband orthomode transducer," Proc. Inst. Elect. Eng., Vol. 137, Pt. H, No. 6, 396-400, Dec. 1990.

    2. Reck, T. J. and G. Chattopadhyay, "A 600 GHz asymmetrical orthogonal mode transducer," IEEE Microw. Wireless Compon. Lett., Vol. 23, No. 11, 569-571, Nov. 2013.
    doi:10.1109/LMWC.2013.2280642

    3. Robertson, S. D., "Recent advances in finline circuits," IRE Trans. Microwave Theory Tech., Vol. 4, 263-267, 1956.
    doi:10.1109/TMTT.1956.1125075

    4. Skinner, S. J. and G. L. James, "Wide-band orthomode transducers," IEEE Trans. Microwave Theory Tech., Vol. 39, 294-300, Feb. 1991.
    doi:10.1109/22.102973

    5. Grimes, P. K., O. G. King, G. Yassin, and M. E. Jones, "Compact broadband planar orthomode transducer," Electron. Lett., Vol. 43, No. 21, 1146-1147, Oct. 2007.
    doi:10.1049/el:20071649

    6. Yu, J. L., C. J. Jin, Y. Cao, and H. S. Chen, "Broad-band orthomode transducers," Proc. Int. Conf. Microwave and Millimeter Wave Technology, Vol. 1, 320-322, Apr. 2008.

    7. Zhuang, Z., B. Li, and Q. Y. Fan, "Design of improved quad-ridged orthomode transducer," Proc. Int. Conf. Microwave and Millimeter Wave Technology, 867-870, Jul. 2010.

    8. Coutts, G. M., "Octave bandwidth orthomode transducers for the expanded very large array," IEEE Trans. Antennas Propag., Vol. 59, No. 6, 1910-1917, Jun. 2011.
    doi:10.1109/TAP.2011.2122220

    9. De Villiers, D. I. L., P. Meyer, and K. D. Palmer, "Design of a wideband orthomode transducer," AFRICON 2009, 1-6, 2009.

    10. Dunning, A., M. Bowen, and Y. Chung, "Offset quad ridged ortho-mode transducer with a 3.4 : 1 bandwidth," 2013 Asia-Pacific Microwave Conference Proceedings (APMC), 146-148, 2013.
    doi:10.1109/APMC.2013.6695219

    11. Stennes, M., "L-band OMT test report,", http://www.nrao.edu/.

    12. Nan, R., "Five hundred meter aperture spherical radio telescope (FAST)," Sci. China Ser. G, Vol. 49, No. 2, 129-148, 2006.
    doi:10.1007/s11433-006-0129-9

    13. Pozar, D. M., Microwave Engineering, 3rd Ed., John Wiley & Sons Inc., 2005.