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Abstract
Planar end-fire arrays can be used in airborne radar applications for forward and rear vision. The purpose of this work is to demonstrate the viability of constructing end-fire arrays with good bandwidth and front-to-back (f/b) ratio. The array so constructed must be extendable to a large number (possibly >1 000) of elements depending on the platform. In this work, starting from a basic S-band 2×2 array, arrays with higher number of elements have been studied through simulations such as 4×4, 4×8, and 2×16 configurations. An end-fire array comprising 4×8 elements (uniformly excited) has been successfully fabricated and tested giving a f/b ratio of 15 dB, and directivity 15 dB and an array comprising 4×8 elements excited by coefficients of Chebyshev polynomials has been simulated which gives a f/b ratio of 25 dB and similar directivity. Beam steering simulations show that the 4×8 array can be steered to ±25 degrees with acceptable side lobe levels.
Additional information
Notes on contributors
Abhijit Sanyal
Abhijit Sanyal completed M.Tech from I.I.T.Delhi in 2009, and is presently serving in the Indian Navy. E-mail: [email protected]
Ananjan Basu
Ananjan Basu was born Aug 12, 1969. He received the B.Tech degree in electrical engineering and M.Tech degree in communication and radar engineering from the Indian Institute of Technology Delhi (I.I.T.Delhi), in 1991 and 1993 respectively, and the PhD. degree in electrical engineering from University of California at Los Angeles (UCLA), in 1998. He has been with the Centre for Applied Research in Electronics, I.I.T. DeIhi as an Assistant Professor (2000-2005) and Associate Professor (since 2005). His specialization is in microwave and millimetre-wave component design and characterization. E-mail: [email protected]
Shiban Kishen Koul
Shiban Kishen Koul received the B.E. degree in Electrical Engineering from the Regional Engineering College, Srinagar in 1977, and the M.Tech and PhD degrees in Microwave Engineering from the Indian Institute of Technology, Delhi, India. He is a Professor at the Centre for Applied Research in Electronics, Indian Institute of Technology Delhi where he is involved in teaching and research activities. His research interests include: RF MEMS, Device modeling, Millimeter wave IC design and Reconfigurable microwave circuits including antennas. He is the Chairman of M/S Astra Microwave Pvt. Ltd, a major private company involved in the Development of RF and Microwave systems in India. He is author/co-author of 192 Research Papers and 7 state-of-the art books. He has successfully completed 25 major sponsored projects, 50 consultancy projects and 30 Technology Development Projects. He holds 7 patents and 4 copyrights.
Dr. Koul is a Fellow of the IEEE, USA, Fellow of the Indian National Academy of Engineering (INAE) India and Fellow of the Institution of Electronics and Telecommunication Engineers (IETE) India, He has received Gold Medal by the Institution of Electrical and Electronics Engineers Calcutta (1977); S.K.Mitra Research Award (1986) from the IETE for the best research paper; Indian National Science Academy (INSA) Young Scientist Award (1986); International Union of Radio Science (URSI) Young Scientist Award (1987); the top Invention Award (1991) of the National Research Development Council for his contributions to the indigenous development of ferrite phase shifter technology; VASVIK Award (1994) for the development of Ka- band components and phase shifters; Ram Lal Wadhwa Gold Medal (1995) from the Institution of Electronics and Communication Engineers (IETE); Academic Excellence award (1998) from Indian Government for his pioneering contributions to phase control modules for Rajendra Radar, Shri Om Prakash Bhasin Award (2009) in the field of Electronics and Information Technology, and teaching excellence award from IIT Delhi in 2012.
Dr. Koul is a distinguished IEEE Microwave Theory and Techniques Lecturer for the year 2012–2014. E-mail: [email protected]
Mahesh Abegaonkar
Mahesh Abegaonkar received his Ph.D. in Physics from the Department of Physics, University of Pune in 2002. He served as Post-Doctoral Researcher and Assistant Professor with Kyungpook National University, Daegu, South Korea, from 2002-2004.He is an Assistant Professor at C.A.R.E. I.I.T.Delhi since 2005. His research interests include multiband, wideband, reconfigurable and UWB antennas and filters. He is a recipient of the Young Engineer Award 2008 of the Indian National Academy of Engineering E-mail: [email protected]
Suma Varughese
Suma Varughese serves as Scientist in the Centre for Airborne Systems D.R.D.O. Govt. of India. E-mail: [email protected]
P. B. Venkatesh Rao
P. B. Venkatesh Rao serves as Scientist in the Centre for Airborne Systems, D.R.D.O. Govt. of India. E-mail: [email protected]