Optimal ratio between feed array spacing and reflector focal length in array-fed reflector antenna

Владислав Владимирович Гаврилин; Юрий Вячеславович Кривошеев; Александр Васильевич Шишлов

doi:10.18127/j00338486-202010(19)-04

Optimal ratio between feed array spacing and reflector focal length in array-fed reflector antenna

Владислав Владимирович Гаврилин¹, Юрий Вячеславович Кривошеев², Александр Васильевич Шишлов³

research article UDC 621.396.67 Pages: 41-48 doi.org/10.18127/j00338486-202010(19)-04

¹ инженер, ПАО «Радиофизика» (Москва, Россия) SPIN-код: не представлен
² к.т.н., начальник сектора, ПАО «Радиофизика» (Москва, Россия); преподаватель, кафедра «Радиофизика и техническая кибернетика», МФТИ (национальный исследовательский университет) (г. Долгопрудный, Россия); преподаватель, кафедра «Проектирование сложных технических систем», Московский авиационный институт (национальный исследовательский университет) (Москва, Россия) SPIN-код: 8561-6799
³ к.т.н., начальник отдела, ПАО «Радиофизика» (Москва, Россия); зам. заведующего кафедрой «Радиофизика и техническая кибернетика», МФТИ (национальный исследовательский университет) (г. Долгопрудный, Россия) SPIN-код: 4603-2872

Keywords: Reflector array array-fed antenna multibeam antenna optimal array spacing

Abstract

Array-fed reflector antenna (AFR) is a system consisting of a large reflector, which provides high directivity of antenna, and a relatively small feed array providing scanning in a narrow angle area (usually till 10°-20°). In this paper a focusing type AFR antenna is considered. In the AFR antenna, a group of feed array elements – so called cluster – is excited in order to form a beam in a given direction of a service area. Such hybrid antennas also are known as Multiple Feed per Beam (MFB) or Focal Array Fed Reflector (FAFR) antennas. Besides, there aremultibeam reflector antennas (MBAs) in which each beam is formed by a single feed. They are called Single Feed per Beam (SFB) reflector antennas. In current work, the AFR MFB antenna with a single offset parabolic reflector is considered. The feed array has hexagonal grid and aperture-type element with Gaussian radiation pattern. Optimal relation between reflector ratio f/D and feed array spacing d/λ is determined. This relation allows to reach the maximum aperture efficiency of the antenna. It is shown that the optimal ratio of array spacing d/λ is equal to 0.5 f/D. Aperture efficiency of the antenna changes insignificantly (±5%) if f/D changes in the range of ± 30% around the optimal value. In earlier papers it is stated that in SFB MBA, optimal spacing is equal to 1.25 f/D which is 2.5 larger than appropriate array element spacing in MFB AFR antenna.

Received: 30.07.2020

How to cite

Гаврилин В.В, Кривошеев Ю.В., Шишлов А.В . Оптимальное соотношение периода облучающей решетки и фокусного расстояния в гибридных зеркальных антеннах // Радиотехника. 2020. Т. 84. № 10(19). С. 41−48. DOI: 10.18127/j00338486-202010(19)-04.

References

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Alimova L.I., Kinber B.E., Klassen V.I., Shishlov A.V. Vozmozhnosti shirokougol'nogo skanirovanija v gibridnyh zerkal'nyh antennah. Radiotehnika i jelektronika. 1981. T. 26. № 12. S. 2500-2510 (In Russian).
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Space Antenna Handbook. Editors W.A. Imbriale, S. Gao, L. Boccia. John Wiley & Sons, Ltd. 2012. 744 p.
Rao S., Shafai L., Sharma S. Handbook of Reflector Antennas. V. III. Applications of Reflectors. Artech House. 2013.
Galindo-Israel V., Lee S.-W., Mittra R. Synthesis of a Laterally Displaced Cluster Feed or a Reflector Antenna with Application to Multiple Beams and Contoured Patterns. IEEE Transactions on Antennas and Propagation. March 1978. V. AP-26. № 2. P. 220-228.
Lam P.T., Lee S.W., Change D.C.D., Lang K.C. Directivity Optimization of a Reflector Antenna with Cluster Feeds. A Closed-Form Solution. IEEE Transactions on Antennas and Propagation. 1985. V. AP-33. № 11. P. 1163-1174.
Vilenko I.L., Krivosheev Ju.V., Shishlov A.V. Gibridnye zerkal'nye antenny s obluchajushhimi aktivnymi fazirovannymi reshetkami. Antenny. 2011. Vyp. 10 (173). S. 22-42 (In Russian)
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.
Shishlov A.V., Vilenko I.L., Krivosheev Y.V. Asymptotic theory, design and efficiency of array-fed reflector antennas. Phased Array Systems and Technology. IEEE International Symposium. Boston-Waltham. 2013. P. 320-327.
Korbanskij I.N. Antenny. M.: Jenergija. 1973 (In Russian).
Anpilogov V.R., Shishlov A.V., Jejdus A.G. Mnogoluchevye antennye sistemy HTS. Tehnologii i sredstva svjazi. 2013, № 6−2. S. 54–67 (In Russian

[1] Rudge A.W., Withers M.J. New Technique for Beam Steering with Fixed Parabolic Reflectors. Proceedings IEE. 1971. 118. Р. 857-863.

[2] Alimova L.I., Kinber B.E., Klassen V.I., Shishlov A.V. Vozmozhnosti shirokougol'nogo skanirovanija v gibridnyh zerkal'nyh antennah. Radiotehnika i jelektronika. 1981. T. 26. № 12. S. 2500-2510 (In Russian).

[3] Mailloux R.J. Hybrid antennas. The Handbook of Antenna Design. Editors A.W. Rudge et al. London. 1982. P. 415-465.

[4] Space Antenna Handbook. Editors W.A. Imbriale, S. Gao, L. Boccia. John Wiley & Sons, Ltd. 2012. 744 p.

[5] Rao S., Shafai L., Sharma S. Handbook of Reflector Antennas. V. III. Applications of Reflectors. Artech House. 2013.

[6] Galindo-Israel V., Lee S.-W., Mittra R. Synthesis of a Laterally Displaced Cluster Feed or a Reflector Antenna with Application to Multiple Beams and Contoured Patterns. IEEE Transactions on Antennas and Propagation. March 1978. V. AP-26. № 2. P. 220-228.

[7] Lam P.T., Lee S.W., Change D.C.D., Lang K.C. Directivity Optimization of a Reflector Antenna with Cluster Feeds. A Closed-Form Solution. IEEE Transactions on Antennas and Propagation. 1985. V. AP-33. № 11. P. 1163-1174.

[8] Vilenko I.L., Krivosheev Ju.V., Shishlov A.V. Gibridnye zerkal'nye antenny s obluchajushhimi aktivnymi fazirovannymi reshetkami. Antenny. 2011. Vyp. 10 (173). S. 22-42 (In Russian)

[9] 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.

[10] Shishlov A.V., Vilenko I.L., Krivosheev Y.V. Asymptotic theory, design and efficiency of array-fed reflector antennas. Phased Array Systems and Technology. IEEE International Symposium. Boston-Waltham. 2013. P. 320-327.

[11] Korbanskij I.N. Antenny. M.: Jenergija. 1973 (In Russian).

[12] Anpilogov V.R., Shishlov A.V., Jejdus A.G. Mnogoluchevye antennye sistemy HTS. Tehnologii i sredstva svjazi. 2013, № 6−2. S. 54–67 (In Russian

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