Non-uniform and Partial Coating of an Aircraft for Achievement of the Minimum Radar Cross Section with the Minimum Weight of Absorbent

Authors

Shiraz University

Abstract

In this paper, the reduction of radar cross section of an airplane using overall and partial coverage of fuselage with absorbing material is studied. Specifically, various coverage strategies are tested to achieve minimum radar cross section and minimum mass of the absorbing material. This is important because the weight of absorbent material is usually great, around 13 Kg per square meter, even for a small thickness of 3mm. Therefore, it is extremely important to find effective strategies for covering the fuselage. Using the moment method and ray tracing method in the CST software package, the monostatic and bistatic RCS of an airplane with partial coverage of RAM are calculated. It is shown how partial coverage of the fuselage can affect the RCS. For instance, the head-front radar cross section of the studied airplane without any RAM coverage was found to be 3.43m2  at 1.925 GHz. When only the wings are covered with RAM, the cross section is reduced to 1.93m2. When the body (without wings) is covered, the average mono-static radar cross section is reduced to 0.43m2. When all parts are covered with RAM, the average mono-static radar cross section is further reduced to 0.17m2 . Furthermore, the effects of partial coverage of the wings are studied.  

Keywords


  1. A. Sefer, M. Alper Uslu and L. Sevgi, “MATLAB-Based 3-D MoM and FDTD Codes for the RCS Analysis of Realistic Objects,” IEEE Antennas & Propagation Magazine, 2015.
  2. Z, Uddin Faysal, M. Shamaun Sobhan, and F. Oshin Ara, “Implementation and Verification of Simulation Methods to Determine Radar Cross Section of Simple Targets,” in International Conference on Electrical Engineering and Information & Communication Technology (ICEEICT), 2014
  3. K. J. Vinoy and R. M. Jha, “Radar Absorbing Materials from Theory to Design and Characterization,” Kluwer Academic Publishers, 1996
  4. M. Alves, R. J. Port, and M. C. Rezende, “Simulations of the radar cross section of a stealth aircraft,” SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC 2007), pp. 409-412, 2007
  5. H. Oraizi and A. Abdolali, “Ultra wide band RCS optimization of multilayered cylindrical structures for arbitrarily polarized incident plane waves,” Progress In Electromagnetic Research, PIER 78, pp. 129–157, 2008
  6. A. Upendra Raju and J. Balakrishnan, “A Novel Method for RCS Reduction of a Complex Shaped Aircraft Using Partial RAM Coating,” International Journal of Engineering and Innovative Technology (IJEIT), vol. 2, no. 2, 2012
  7. L. A. de Andrade, L. S. C. dos Santos, and A. Medeiros Gama, “Analysis of Radar Cross Section Reduction of Fighter Aircraft by Means of Computer Simulation,” J. Aerosp. Technol. Manag., São Jose dos Campos, vol. 6, no. 2, pp. 177-182, 2014
  8. J. Mo, L. Shen, B. Wei, W. Fang, and Y. Yan, “RCS computation of engine by parallel higher order MoM with out-of-core technique,”.
  9. M. Jingyan, F. Weidong, and X. Haigao, “Accurate Evaluation of RCS on the Struture of Aircraf Inlets,” in Antennas & Propagations (ISAP), Nanjing, 2013.
  10. J. Säily and A. V. Räisänen, “Studies on specular and non-specular reflectivities of radar absorbing material (RAM) at submilimetere wavelength,” Helsinki University of Technology, 2003.
  11. E. F, Knott, J. F. Schaeffer, and M. T. Tuley, “Radar Cross Section,” Sci. Tech. Publishing, 2004.
  12. “NASA Low Outgassing,” Masterbond, [Online]. Available: http://www.masterbond.com/certifications/nasa-low-outgassing. [Accessed 28 8 2016].
  13. “ECCOSORB®,” Emerson and Cumming Microwave Products Hong Kong LTD, 2011. http://www.eccosorb.com.hk/materials/ECCOSORB [2016].
Volume 5, Issue 2 - Serial Number 2
January 2020
Pages 27-40
  • Receive Date: 24 October 2016
  • Revise Date: 24 August 2019
  • Accept Date: 19 September 2018
  • Publish Date: 23 July 2017