Mode-matching Generalised Scattering Matrix Based Electromagnetics Performance Analysis of Thick Frequency Selective Surfaces for Airborne Applications

  • Shiv Narayan National Aerospace Laboratories, Bengaluru
  • Raveendranath U. Nair National Aerospace Laboratories, Bengaluru
  • R. M. Jha National Aerospace Laboratories, Bengaluru
Keywords: Frequency selective surface, generalized scattering matrix, mode-matching technique, thick FSS


Electromagnetic (EM) performance of thick aperture type FSS has been analyzed using mode-matching generalized scattering matrix (MM-GSM) technique for airborne radome applications. The MM-GSM technique facilitates accurate EM performance predictions for both single and multi-layered frequency selective surfaces (FSS) structures as it includes evanescent and propagating modes in the EM analysis. The computed transmission efficiency of the thick FSS structure over X-band at normal and near normal incidence shows excellent matching with the reported results in open domain. he study has been extended to determine the FSS band-pass transmission characteristics for incidence angles as high as 80° encountered in highly-streamlined nosecone radomes. Further, the dependence of transmission efficiency of the FSS structure on the dielectric parameters of the material filled within the apertures has also been analyzed. The present work shows that the proposed thick aperture-type FSS structure has potential applications in the design of airborne radomes.

Defence Science Journal, 2013, 63(3), pp.249-253DOI:

Author Biographies

Shiv Narayan, National Aerospace Laboratories, Bengaluru

Dr Shiv Narayan obtained MSc  (Physics) from Banaras Hindu University, Varanasi, India in 2001. He received PhD (Electronics Engineering) from Indian Institute of Technology (Banaras Hindu University), Varanasi, India in 2006. He is currently working as a Scientist at Centre for Electromagnetics (CEM) of CSIR-National Aerospace Laboratories, Bangalore, India. He has published 35 technical documents including journal and conferences papers.His research interests are broadly in the field of electromagnetics applications and the topics include: Frequency selective surfaces, metamaterials, numerical methods in electromagnetics, EM material characterization, microstrip patch antenna, and pattern synthesis of antenna array.

Raveendranath U. Nair, National Aerospace Laboratories, Bengaluru

Dr Raveendranath U. Nair received his  MSc and PhD in Physics (Microwave Electronics) Mahatma Gandhi University, kerala, India, in 1989 and 1997, respectively. Presently he has been working as Scientist at the CEM CSIR-NAL, Bangalore, India where currently he is a principal scientist. Dr Raveendranath U. Nair was the recipient of CSIR-NAL Excellence in Research Award for the year 2007-2008.  He is a life member of AeSI, member of ISAMPE and member of IEEE. He has authored/co-authored over 100 research publications. His research interests include computational electromagnetics, EM design, analysis and performance measurements of radomes, metamaterials, frequency selective surfaces, EM material characterization techniques.

R. M. Jha, National Aerospace Laboratories, Bengaluru

Dr Rakesh Mohan Jha obtained his BE (Hons.) EEE and MSc (Hons.) Physics from BITS Pilani (Raj.), in 1982 and PhD (Engg.) Indian Institute of Science, Bangalore, in 1989. He is currently a Chief Scientist and Head of Centre for Electromagnetics (CEM) at CSIR-National Aerospace Laboratories, Bangalore. Dr Jha has published more than 350 scientific research papers and technical reports. He was awarded Sir CV Raman Award for Aerospace Engineering for the year 1999. His active areas of research are in the domain of computational electromagnetics (CEM) for aerospace applications; these include GTD/UTD, 3-D ray tracing and surface modelling, aerospace antennas and radomes, radar cross section (RCS) studies including active RCS reduction, radar absorbing materials (RAM) and radar absorbing structures (RAS), and metamaterials for aerospace applications.

How to Cite
Narayan, S., Nair, R., & Jha, R. (2013). Mode-matching Generalised Scattering Matrix Based Electromagnetics Performance Analysis of Thick Frequency Selective Surfaces for Airborne Applications. Defence Science Journal, 63(3), 249-253.
Aeronautical Systems