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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/8384
Title: Implementation of multilayer ferrite radar absorbing coating with genetic algorithm for radar cross-section reduction at X-band
Authors: Parida R.C.
Singh, Dharmendra
Agarwal N.K.
Published in: Indian Journal of Radio and Space Physics
Abstract: Genetic algorithm (GA) approach has been analyzed to optimize the thickness of various layers as well as selection of suitable ferrite material for better absorption and reduction of radar cross-section (RCS) at X-band frequency. For this purpose, the available ferrite materials with frequency-dependent permittivities ?(f) and permeabilities ?(f) have been used as data base. An empirical relationship has been developed between ? and f as well as ? and f for application of GA to select the proper ferrite material at particular frequency range for minimum reflection or maximum absorption and reduction of RCS. The GA has advantage that, with fitness function, it places an upper bound on the total thickness of the coating as well as on the number of layers contained in the coating. This greatly simplifies manufacturing of absorber in the form of sheet by coating ferrite material. Four-layer coating with different thickness and different ferrite materials has been simulated by GA and the results obtained with GA have been synthesized on aluminum plate. The paint for coating over aluminum sheet has been prepared by mixing the known ferrite powders (used in data base) with glass epoxy resin with suitable amount of hardener. The absorption has been measured by absorber testing device (ATD) method and RCS has been measured by monostatic radar measurements at X-band (8-12 GHz) in anechoic chamber. The absorption and RCS were measured after each layer of coating. A considerable amount of reduction of RCS and absorption is observed as compared to the plain aluminum sheet at X-band.
Citation: Indian Journal of Radio and Space Physics (2007), 36(2): 145-152
URI: http://repository.iitr.ac.in/handle/123456789/8384
Issue Date: 2007
Keywords: Absorber testing device
Genetic algorithm
Radar cross-section
ISSN: 3678393
Author Scopus IDs: 57209436788
36912015700
57214481811
Author Affiliations: Parida, R.C., Department of Electronics and Computer Engineering, Indian Institute of Technology Roorkee, Roorkee (U.A.) 247 667, India
Singh, D., Department of Electronics and Computer Engineering, Indian Institute of Technology Roorkee, Roorkee (U.A.) 247 667, India
Agarwal, N.K., Department of Electronics and Computer Engineering, Indian Institute of Technology Roorkee, Roorkee (U.A.) 247 667, India
Corresponding Author: Parida, R.C.; Department of Electronics and Computer Engineering, Indian Institute of Technology Roorkee, Roorkee (U.A.) 247 667, India; email: dharmfec@iitr.ernet.in
Appears in Collections:Journal Publications [ECE]

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