Abstract
In this paper at first, the ordinary septum polarizer has been designed and used for parabolic reflector feed in Ground station antenna. Next, a novel design of modified septum polarizer with wider beam-width is proposed for satellite antenna. Compactness, low weight, large bandwidth, high TX/RX isolation, low axial ratio as well as low loss are the advantages of the septum polarizer. The designed antenna has high purity circular polarization (
Acknowledgements
I would like to express my special thanks to M.R. Fatorehchy who helped me in this project. I would also like to thank Dr R. Eqra and Mrs S. Farshadfar who assisted the research.
References
[1] C. A. Leal-Sevillano, K. B. Cooper, J. A. Ruiz-Cruz, J. R. Montejo-Garai, and J. M. Rebollar, “A 225 GHz circular polarization waveguide duplexer based on a septum orthomode transducer polarizer,” IEEE Trans. Terahertz Sci. Technol., vol. 3, pp. 574–583, September 2013.10.1109/TTHZ.2013.2264317Search in Google Scholar
[2] J. Bornemann and F. Arndt, “Modal-S-matrix design of optimum stepped ridged and finned waveguide transformers,” IEEE Microwave Theory Tech., vol. MTT-35, pp. 561–567, Jun. 1987.10.1109/TMTT.1987.1133704Search in Google Scholar
[3] J. Esteban and J. M. Rebollar, “Field theory CAD of septum OMTpolarizers,” in Antennas Propag. Society International Symposium, AP-S., vol. 4, pp. 2146–2149. Jul. 1992.10.1109/APS.1992.221441Search in Google Scholar
[4] M. J. Franco, “A high-performance dual-mode feed horn for parabolic reflectors with a stepped-septum polarizer in a circular waveguide,” IEEE Antennas Propag. Mag., vol. 53, pp. 142–146, Jun. 2011.10.1109/MAP.2011.6028434Search in Google Scholar
[5] J. Bornemann and V. A. Labay, “Ridge waveguide polarizer with finite and stepped-thickness septum,” IEEE Trans. Microw. Theory Techn., vol. 43, pp. 1782–1787, Aug. 1995.10.1109/22.402260Search in Google Scholar
[6] F. Alessandri, G. Bartolucci, and R. Sorrentino, “Admittance matrix formulation of waveguide discontinuity problems: computer- aided design of branch guide directional couplers,” IEEE Trans. Microw. Theory Tech., vol. 36, pp. 394–403. Feb. 1988.10.1109/22.3528Search in Google Scholar
[7] M. Chen and G. Tsandoulas, “A wide-band square-waveguide array polarizer,” IEEE Trans. Antennas Propag., vol. AP-21, pp. 389–391, May. 1973.10.1109/TAP.1973.1140486Search in Google Scholar
[8] T. A. Milligan, Modern Antenna Design, 2nd ed. New Jersey: John Wiley & Sons, Inc., 11 Jul. 2005.10.1002/0471720615Search in Google Scholar
[9] J. Galván and D. Colantonio, “Low back radiation compact antenna for data downlink in LEO satellites”, IEEE Conference, Belem, Brazil, 3–6 Nov. 2009.10.1109/IMOC.2009.5427466Search in Google Scholar
[10] C. A. Balanis, Antenna Theory Analysis and Design, 3rd ed. New Jersey: John Wiley & Sons, Inc., 2005.Search in Google Scholar
[11] M. Fazaelifar and M. R. Fatorehchy, “Design, fabrication and test of parabolic cylinder reflector and horn for increasing the gain of vlasov antenna,” Prog. Electromagn. Res. Lett., vol. 4, pp. 191–203, 2008.10.2528/PIERL08102403Search in Google Scholar
[12] J. Kraus and R. J. Marhefka, Antennas for All Applications, 3rd ed. New York, NY: McGraw-Hill, 2003.Search in Google Scholar
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