Design Optimization of Radar Absorbing Materials Using Particle Swarm Optimization

Design Optimization of Radar Absorbing Materials Using Particle Swarm Optimization

Kavya Kumari Sivakoti (Department of Electronics and Communication Engineering, Anil Neerukonda Institute of Technology and Sciences (ANITS), Visakhapatnam, India), Mamatha Basava (Naval Science and Technological Laboratory, Visakhapatnam, India), Rao Venkata Balaga (Naval Science and Technological Laboratory, Visakhapatnam, India) and Balarama Murty Sannidhi (Department of Electronics and Communication Engineering, Anil Neerukonda Institute of Technology and Sciences (ANITS), Visakhapatnam, India)
Copyright: © 2017 |Pages: 20
DOI: 10.4018/IJAMC.2017100107
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Abstract

Microwave absorbers have numerous applications in the modern-day military and civil industries. This paper presents the performance of the Particle Swarm Optimization (PSO) algorithm to obtain optimal designs for multilayer microwave absorber over different frequency ranges. The goal of this optimization is to make decision about number of layers, selection of suitable combination of materials from a predefined database, thereby minimizing the overall reflection coefficient and designing a low weight electromagnetic absorber, which absorbs the maximum amount of incident electromagnetic energy. Microwave absorbers or radar absorbing materials (RAM) performance is studied by varying thickness and number of layers. For each different configuration obtained with PSO, simulated results are presented. The best results obtained using PSO are compared with those obtained using another optimization technique, genetic algorithm and also compared with the results computed using standard RCS computation software.
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2. Problem Formulation

For the multilayer structure of Figure 1, which is backed up by PEC (perfectly electric conductor), the characteristics of each layer are the frequency dependent complex permittivity and permeability, which are given by Eq. (1), Eq. (2) and the thickness ti. (Goudos & Sahalos, 2006).

(1)
(2) where and are the free space permeability and permittivity respectively and the imaginary parts represent the amount of dielectric and magnetic losses respectively. The incident plane wave is normal to the multilayered structure and it may have either Transverse Electric (TE) or Transverse Magnetic(TM) polarization, so the angle (Parida, Singh, & Agarwal, 2007). The incident media is free space while all the layers are assumed to be infinite.

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