This paper describes the concept and design of a novel compactself-supported cup feedantenna for parabolic reflectors. The feed antenna consists of an open waveguide cup which is excited by a disk loaded dipole. This structure is fed by a coaxial waveguide through a split-coaxial balun and has a rear radiation pattern toward the reflector antenna. Two different types of this configuration are designed in this paper: a linearly-polarized grid reflector antenna fed by a single dipole excitation, and a circularly-polarized solid reflector antenna fed by a cross dipole excitation. The measurement is done for the former, and simulation results of the latter via two different software packages CST and HFSS are compared in this paper. Analyzing the results shows that both types of cup feed antenna have an excellent aperture efficiency and low side lobe level.
2. Liu, C., S. Yang, and Z. Nie, "Design of a parabolic reflector antenna with a compact splash-plate feed," Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC), 2013, 24-244, 2013.
3. Poulton, G. T. and T. S. Bird, "Improved rear-radiating waveguide cup feeds," International Symposium on Antennas and Propagation, 1986, Vol. 24, 79-82, 1986.
doi:10.1109/APS.1986.1149782
4. Schwerdtfeger, R., "A coaxial dual mode feed system," 9th European Microwave Conference, 1979, 196-200, 1979.
doi:10.1109/EUMA.1979.332699
5. Kildal, P. S., "The hat feed: A dual-mode rear-radiating waveguide antenna having low cross polarization," IEEE Trans. Antennas Propag., Vol. 35, 1010-1016, Sep. 1987.
doi:10.1109/TAP.1987.1144221
6. Maula, M. Q. E. and L. Shafai, "Low-cost, microstrip-fed printed dipole for prime focus reflector feed," IEEE Trans. Antennas Propag., Vol. 60, 5428-5433, Nov. 2012.
doi:10.1109/TAP.2012.2208170
7. Maula, M. Q. E., L. Shafai, and Z. A. Pour, "A corrugated printed dipole antenna with equal beamwidths," IEEE Trans. Antennas Propag., Vol. 62, 1469-1474, Mar. 2014.
doi:10.1109/TAP.2013.2295598
8. Bird, T. S., Antenna Feeds, Encyclopedia of RF and Microwave Engineering, 2005.
9. Patel, K. N. and Y. Patenaude, "L-band integrated feed array design for mobile communication satellites," Canadian Journal of Electrical and Computer Engineering, Vol. 17, No. 3, 113-119, Jul. 1992.
doi:10.1109/CJECE.1992.6594367
10. Bolster, M. F., "A new type of circular polarizer using crossed dipoles," IRE Trans. Microwave Theory and Techniques, Vol. 9, No. 5, 385-388, Sep. 1961.
doi:10.1109/TMTT.1961.1125358
11. Makarov, S. N. and R. Ludwig, "Analytical model of the split-coaxial balun and its application to a linearly-polarized dipole or a CP turnstile," IEEE Trans. Antennas Propag., Vol. 55, No. 7, 1909-1918, Jul. 2007.
doi:10.1109/TAP.2007.901503
Submit
