Radiotekhnika
Publishing house Radiotekhnika

"Publishing house Radiotekhnika":
scientific and technical literature.
Books and journals of publishing houses: IPRZHR, RS-PRESS, SCIENCE-PRESS


Тел.: +7 (495) 625-9241

 

Efficiency of antennas with contoured radiation patterns. Two-dimensional problem

Keywords:

V. I. Melnichuk – PhD student of Moscow Institute of Physics and Technology, engineer, JSC «Radiofizika»
A. V. Shishlov – PhD, head of department, JSC «Radiofizika», deputy head of chair radiophysics and technical cybernetics, Moscow Institute of Physics and Technology


Efficiencies of contoured areas coverings by antennas synthesized by means of amplitude-only, phase-only and amplitude-and-phase methods are considered. Coverage efficiency factor defined as the ratio of minimum directive gain in a service area and ideal directive gain is considered as a main criterion of efficiency. Sidelobe level, gain variations within the service area and slope width of the main lobe are assumed as spare efficiency criteria. Radiation patterns were synthesized for contoured areas (sectors in the case of two-dimensional problem) of different width by employing different methods: amplitude-only synthesis, phase-only synthesis (one option is based on geometrical optics, the other one is based on numerical optimization), amplitude-and-phase synthesis (one option is based on partial radiation patterns method, the other one – on numerical optimization). Radiation patterns synthesized according to geometrical optics were used as initial approximations for optimization procedures both in phase-only and amplitude-and-phase methods. Theoretical estimations of coverage efficiencies are done for phase and amplitude-and-phase approaches, assuming that the radiation pattern is a trapezoid. The results of numerical modeling reveal that values of efficiency of contoured area coverings by synthesized radiation patterns coincide with theoretical estimations with accuracy of 0.1–0.15 dB for wide areas containing many beam widths of the cophased aperture. Comparison of radiation patterns synthesized by amplitude-and-phase method and phase-only method show that the first method yields better coverage efficiency, significantly lesser sidelobe level and slope width of main lobe compared to the first method. Amplitude-only synthesis allows to use simple antenna constructions but it is behind the former two methods in terms of coverage efficiency, beam efficiency, gain variations within a service area, and main lobe slope width.
References:

  1. Ahmad G., Mohsin S.A. Modern Communication Satellite Antenna Technology. Recent Advances in Technologies. InTech. 2009.
  2. Kitsuregawa T. Advanced Technology in Satellite Communication Antennas. Electrical and Mechanical Design. Boston–Lon­don: Artech House. 1989.
  3. Bornemann W., Balling P., English W.J. Synthesis of Spacecraft Array Antennas for Intelsat Frequency Reuse Multiple Contoured Beams // IEEE Transactions on Antennas and Propagation. 1985. V. 33. № 11. P. 1186–1193.
  4. Bhattacharyya A.K. Projection Matrix Method for Shaped Beam Synthesis in Phased Arrays and Reflectors // IEEE Transactions on Antennas and Propagation. 2007. V. 55. № 3. P. 675–683.
  5. Bucci O.M., Isernia T., Morabito A.F. An Effective Deterministic Procedure for the Synthesis of Shaped Beams by Means of Uniform-Amplitude Linear Sparse Arrays // IEEE Transactions on Antennas and Propagation. 2013. V. 61. № 1. P. 169–175.
  6. Shishlov A.V., Vilenko I.L., Krivosheev Yu.V. Asymptotic Theory, Design and Efficiency of Array-Fed Reflector Antennas // Proceedings of the 2013 IEEE International Symposium on Phased Array Systems and Technology. Boston, USA. October 2013. P. 8.
  7. Shishlov A.V., Vilenko I.L., Krivosheev Yu.V. Active Array Fed Reflector Antennas. Practical Relations and Efficiency // Proceedings of the 6-th European Conference on Antennas and Propagation. Prague. March 2012. 5 P.
  8. Shishlov A.V. Zerkal'ny'e antenny' s konturny'mi diagrammami napravlennosti – e'ffektivnost' i predel'ny'e vozmozhnosti // Radiotexnika. 2006. № 2. S. 45–50.
  9. Shishlov A.V. Teoriya i proektirovanie zerkal'ny'x antenn dlya radiosistem s konturny'mi zonami obsluzhivaniya // Radiotexnika. 2007. № 4. S. 39–49.
  10. Shishlov A.V., Shubov A.G. E'ffektivnost' antenny'x ustrojstv s konturny'mi diagrammami napravlennosti // E'lektromagnitny'e volny' i e'lektronny'e sistemy'. 1997. T. 2. № 1.
  11. Vajnshtejn L.A. Teoriya difrakczii i metod faktorizaczii. M.: Sov. radio. 1966.
  12. Romanyuk Ju.A. Diskretnoe preobrazovanie Fur'e v czifrovom spektral'nom analize. M.: MFTI. 2007.
  13. Vilenko I.L., Denisenko V.V., Reutov A.S., Tobolev A.K., Shishlov A.V. Odnozerkal'ny'e antenny' s veerny'mi luchami na osnove reflektorov-fokusatorov // Radiotexnika. 2008. № 4. S. 46–53.
  14. Skobelev S.P. Fazirovanny'e antenny'e reshetki s sektorny'mi parczial'ny'mi diagrammami napravlennosti. M.: Fizmatlit. 2010.

May 29, 2020

© Издательство «РАДИОТЕХНИКА», 2004-2017            Тел.: (495) 625-9241                   Designed by [SWAP]Studio