V. N. Mitrokhin - Dr.Sc. (Eng.), Professor of Bauman Moscow State Technical University; Senior Research Scientist of Bauman Moscow State Technical University Research Institute E. O. Mozharov - Post-graduate Student of Bauman Moscow State Technical University; Junior Research Scientist of Bauman Moscow State Technical University Research Institute E-mail: eduardmozharov@yandex.ru

The aim of this article is research of the radioholography method of control of reflector antennas profile by the electromagnetic field in the radiating near-field zone. Various methods of reflector antennas surface control are considered. It is noted that many of them are not suitable for the control and alignment large-aperture stationary antennas surfaces, as there are difficult requirements: high accuracy measurements at high tested size. Two implementation schemes of the considered radioholography reflector antennas profile control method are presented: based on a microwave generator and receiver; based on a microwave network analyzer. The test range for each of the proposed schemes includes a planar near-field scanner and microwave probe, which works in receiving and transmitting mode. Scanning in a plane parallel to the aperture of the reflector allows to obtain radiohologram, which includes data with the position of the probe, the amplitude and phase of the received signal. The surface profile deviations of the tested reflector antenna from a reassigned paraboloid of revolution after radiohologram processing, with proposed in the article way, are calculated. A series of numerical experiments, that can identify the capabilities of the proposed radioholography method, with the planar scanner work simulation are made. The calculation of the near electromagnetic field for each probe position during scanning are performed by the physical optics method in the FEKO software. Tested reflector antenna is circular aperture made up of 24 segments, moving which simulates the inaccuracy of the reflector construction. Analysis of the experimental results demonstrates the applicability of the radioholography control method. It is experimentally shown that the scanning step of λ/2 allows one to obtain correct results, the choice of a smaller step is not expedient; the measuring mean-square error of the received signal phase σ, which not exceeding 10 deg, allows to obtain the surface profile without significant inaccuracy; the reflector surface profile measurement accuracy is about λ/150.

 

1. Parshhikov A.A. Razrabotka i issledovanie ostronapravlennykh zerkalnykh antenn dlja radiosistem millimetrovogo diapazona. Diss. - kand. tekhn. nauk. Moskva. 1978.
2. Vechtomov V.A., Golubcov M.E., Mozharov EH.O. Zerkalnyjj kollimator millimetrovogo diapazona voln // Vestnik MGTU im. N.EH. Baumana. Ser. Priborostroenie. 2012. № 7. S. 303-311.
3. Bejj A.N., Mitrokhin V.N., Parshhikov A.A., JAmashkin V.P. Antennyjj poligon s zerkalnym kollimatorom // Antenny. 2006. № 7. S. 83-84.
4. Grattan C.L. Compact-scan, plane-polar microwave holographic technique for reflector antenna profile measurement // IEE Proceeding-H. 1992. V. 139. № 1. P. 91-97.
5. Peggs G.N., P G Maropoulos P.G., Hughes E.B., Forbes A.B., Robson S., Ziebart M., Muralikrishnan B. Recent developments in large-scale dimensional metrology // Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture. 2009. V. 223. P. 571-595.
6. Mast A.W. Electronic antenna calibration system and measurements for compensating real-time dynamic distortions // IEEE Aerospace Conference Proceedings. 2010. P. 774-785.
7. Yan Xu, Fu-ling Guan. Structure design and mechanical measurement of inflatable antenna // Acta Astronautica. 2012. V. 76. P. 13-25.
8. Lee T.-H., Rudduck R.C., Bailey M.C. A surface distortion analysis applied to the hoop/column deployable mesh reflector antenna // IEEE Antennas and Propagation. 1989. V. 37. № 4. P. 452-458.
9. Baars J.W.M., Lucas R., Magnum J.G., Lopez-Perez J.A. Near-field radio holography of large reflector antennas // IEEE Antennas and Propagation. 2007. V. 49. № 5. P. 399-406.
10. Kalinin A.V. Radiogolografija bolshikh antenn // Vestnik Nizhegorodskogo universiteta im. N.I. Lobachevskogo. 2011. № 5 (3). S. 175-182.
11. Mayer C.E., Davis J.H., Peters W.L., Voge W.J. A holographic surface measurement of Texas 4,9 antenna 86 GHz // IEEE Transactions on Instrumentation and Measurement. 1983. V. 32. № 1. P. 102-109.
12. Rahmat-Samii Y. Microwave holography of large reflector antennas - simulation algorithm // IEEE Transactions on Antennas and Propagation. 1985. V. 33. № 11. P. 1194-1203.
13. Mayer C.E. Millimeter wave holographic measurements of large reflector antennas // Antennas and Propagation Society International Symposium. 1983. V. 21. P. 410-413.
14. Parin C.G., Lau A.K.K., Clarricoats P.J.B. Phase-only reflector antenna metrology // IEE Proceeding-H. 1989. V. 136. № 4. P. 343-349.
15. Mitrokhin V.N., Mozharov EH.O. Radiogolograficheskijj metod kontrolja profilja parabolicheskikh zerkalnykh antenn po ehlektromagnitnomu polju v blizhnejj zone // Vestnik MGTU im. N.EH. Baumana. Ser. Priborostroenie. 2015. № 4. S. 81-95.
16. Patent US 6288683. Antenna mirror surface measuring/adjusting device / H. Deguchi, N. Miyahara, S. Urasaki, S. Matsumoto, M. Ishiguro, T. Mizuno, S. Makino. Opubl. 11.09.2001.
17. Lavrov V.I., Kuzovnikov A.V., Somov V.G. Metodika ocenki parametrov krupnogabaritnykh bortovykh antenn sputnikovykh sistem svjazi // Antenny. 2012. № 2. S. 40-46.
18. SHustikov V.JU., SHumov A.V., Ryzhov V.S., ZHilcov A.V. Rezultaty nabljudenijj millimetrovogo radioizluchenija solnechnykh vspyshek na radioteleskope RT-7,5 MGTU im. N.EH. Baumana // Vestnik MGTU. Ser. «Priborostroenie». Spec. vypusk № 7. «Radioopticheskie tekhnologii v priborostroenii». 2012. S. 277-288.
19. Dvorkovich V.P., Dvorkovich A.V. Okonnye funkcii dlja garmonicheskogo analiza signalov. M.: Tekhnosfera. 2016.
20. Yaghjian A.D. An overview of near-field antenna measurements // IEEE Transactions on Antennas and Propagation. 1986. V. 34. № 1. P. 30-45.
21. Krajjnijj V.I., Semenov A.N., CHapurskijj V.V. Fokusirovka mnogochastotnykh multistaticheskikh radiogologramm metodom neehkvidistantnogo BPF // Nauka i obrazovanie: nauchnoe izdanie MGTU im. N.EH. Baumana. 2015. № 11. S. 292-300.