Abstract
The gravity deformation of large reflector antenna causes the deterioration of antenna performance. In order to solve the problem, the method of real time adjustment of sub-reflector to reduce the influence of gravity deformation is proposed in the paper. The influence of the position translation and rotation of sub-reflector on antenna gain and pointing is analyzed. The mathematical model about the posture change of sub-reflector with the adjustment of antenna elevation angle is built. A set of data about the main reflector deformation of 35 m antenna for different elevation angles was obtained through digital photogrammetry. The best fit was conducted. And then a set of optimum position coordinate of sub-reflector obtained through best fit were superposed with the measured displacement data of sub-reflector under the action of gravity with respect to different elevation angle. And then a set of final adjustment data of sub-reflector was obtained and substituted into the mathematical model. The best fit was conducted again by using the least squares to calculate the parameters of mathematical model. The model was used to adjust sub-reflector in real time to reduce the influence of gravity deformation on the antenna performance. The simulation results show that the gain of 35 m antenna in X and Ka band can be increased by 0.52 and 1.95 dB after the sub-reflector position is adjusted in real time by using the model.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Duan BY (2011) Theory, method and application of electromechanical coupling of electronic equipment. Science Press, Beijing, pp 25–26 (in Chinese)
Wang CS, Li JJ (2012) Review of compensation methods of lange reflector antenna with surface deformation. In: Symposium on electromechanical, microwave communication equipment structure technology of China electronics society. Harbin, China, pp 1–7
Blank SJ, Imbriale WA (1988) Array feed synthesis for correction of reflector distortion and vernier beamsteering. IEEE Trans Antennas Propag 36(11):1351–1358
Cherrette AR, Acosta RJ, Lam PT, Lee S-W (1989) Compensation of reflector antenna surface distortion using an array feed. IEEE Trans Antennas Propag 37(8):966–978
Smith WT, Stutzman WL (1992) A pattern synthesis technique for array feeds to improve radiation performance of large distorted reflector antennas. IEEE Trans Antennas Propag 40(1):57–62
Imbriale William A (2002) Large antennas of the deep space network. Jet Propulsion Laboratory, Pasadena, pp 140–149
Vilnrotter V, Fort, D. Demonstration and evaluation of the Ka-band array feed compensation system on the 70-meter antenna at DSS 14. The Telecommunications and Mission Operations Progress Report 42-139, pp 1–17. http://tmo.jpl.nasa.gov/tmo/progressreport/42-139/139J.pdf
Imbriale WA, Hoppe DJ. Computational methods and theoretical results for the Ka-band array feed compensation system/deformable flat plate experiment at DSS 14 Telecommunications and Mission Operations Progress Report 42-140, pp 1–23. http://tmo.jpl.nasa.gov/tmo/progressreport/42-140/140I.pdf
Hoferer RA, Rahmat-Samii Y (2002) Subreflector shaping for antenna distortion compensation: an efficient Fourier-Jacobi expansion with GO/PO analysis. IEEE Trans Antennas Propag 50(12):1676–1687
Shenheng Xu, Rahmat-Samii Yahya (2009) Subreflectarrays for reflector surface distortion compensation. IEEE Trans Antennas Propag 57(2):364–372
Xu S, Rajagopalan H (2007) A novel reflector surface distortion compensating technique using a sub-reflectarray. In: Proceedings of IEEE antennas and propagation society international symposium, pp 5315–5318
Richter P, Franco M, Rochblatt D. Data analysis and results of the Ka-band array feed compensation system deformable flat plate experiment at DSS 14. The Telecommunications and Mission Operations Progress Report 42-139, pp. 1–29. http://tmo.jpl.nasa.gov/tmo/progressreport/42-139/139H.pdf
JIANG Zheng and LEI Pei-tian (1991) A best-fit method for the shaped Cassegrain antenna. Syst Eng Electron 13(4):36–42
Guo-jun LENG, Wei WANG, Bao-yan DUAN (2011) Subreflector real-time compensation for main reflector deformation of shaped Cassegrain antenna. Syst Eng Electron 33(5):996–1000
Kiuchi Hitoshi (2013) A holography receiver design for the ALMA sub millimeter antenna surface measurement. IEEE Trans Antennas Propag 62(10):2763–2772
Duan YH (2014) Microwave holographic metrology of the surface accuracy of reflector antenna—simulation method. In: Proceedings of the 27th conference of spacecraft TT&C technology in China, Guangzhou China, pp 103–111
Bao-feng WANG, Guang-yun LI (2007) Application of high accuracy digital photogrammetric technology in a 50 meter large antenna. Eng Surv Mapp 16(1):42–46
Li H, Yang DH (2010) Research on the pose measurement of a 6-DOF platform using a single camera. Opt Tech 36(3):344–349
Fan QH, Fan SH (2010) Application of digital industrial photogrammetric technology to measure the surface accuracy of 13.7 m millimeter-wave radio telescope antenna. ACTA Astron Sin 51(2):210–216
GRASP9, Technical Description Editor: Knud Pontoppidan, TICRA, Denmark September 2005
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Tsinghua University Press, Beijing and Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Duan, Y. (2018). The Study on the Adjustment Model of Sub-reflector and Engineering Realization Method. In: Shen, R., Dong, G. (eds) Proceedings of the 28th Conference of Spacecraft TT&C Technology in China. TT&C 2016. Lecture Notes in Electrical Engineering, vol 445. Springer, Singapore. https://doi.org/10.1007/978-981-10-4837-1_4
Download citation
DOI: https://doi.org/10.1007/978-981-10-4837-1_4
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-10-4836-4
Online ISBN: 978-981-10-4837-1
eBook Packages: EngineeringEngineering (R0)