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Abstract
Based on a simple, but accurate transmission line model a new formula for location the position of a Gunn diode on a rectangular microstrip patch antenna has been proposed. It also takes into account the intrinsic losses of the patch. Unlike the earlier design formula the present design yields improved spectral purity of the radiated wave, and better radiation pattern. Experimental results have been presented in support of the theoretical conclusions.
Additional information
Notes on contributors
B N Biswas
B N Biswas received (Calcutta) University Gold Medal (1961) for standing first in the first class in M Sc (Tech), K S Krishnan Memorial Award twice, UGC National Lectureship, Foundation Fellowship of West Bengal Academy of Science & Technology (1998), S K Mitra Memorial Award, biodata appeared in Reference India, Biography International and Indo-European Who's who and Member, International Union of Radio Science in Commission C & D.
Done pioneering works on Nonlinear oscillations, Phase Locked Loops, Communications, Microwave and mm-wave oscillators, Power combiners and discriminators, Signal processing, Software controlled PLL, Microwave photonics.
Published more than 170 papers in international journals of repute, supervised 16 Ph D dissertations, a book on Phase lock theories and applications.
Successfully carried out more than a dozen of research funded by UGC, DST, DoE, Defence, ISRO etc.
Organised workshops and National symposia in this University. Presented papers and chaired sessions in international conferences in India and abroad. Delivered K Mitra Memorial lecturer and invited talk at the UNDP sponsored workshop, acted as a members of the organising and advisory committees of international conferences held abroad.
Reviewer of inland and foreign journals, a visiting faculty member at the University of Minnesota, delivered invited lecturers many times at the University of Pisa (Italy), University of Erlangen (Germany), University of Bath (UK), University of Kyoto, Okayama & ElectroCommunication University of Osaka (Japan), Czechosolovak Academy of Science, KMTL (Bangkok).
Has given more than 30 (thirty) years of rural academic services-introducing various courses of studies on Electronics and Computers, initiating and consolidating scientific and technological culture in this part of the country. His PhD students received URSI Young Scientist awards and IEEE Junior Scientist Award.
A Bhattacharya
A Bhattacharya was born on December 30, 1970 in Calcutta. She received the B Sc & M Sc degree in Physics from the University of Burdwan, West Bengal in the year 1992 and 1994 respectively. Since 1996 she has been with the Department of Physics, Burdwan University as a research fellow. Her current research interests are in active microstrip patch antenna as well as microwave circuits.
D Mondal
D Mondal was born on 1963 received the MSc and PhD degrees in Physics, both from the University of Burdwan, India in 1985 and 1992 respectively. In May, 1987 he joined as a JRF in the physics Department of Burdwan University and became a Scientific Officer in August, 1989 in the same Department. His area of research interests are in the fields of Microwave and mm-wave communication systems, Microwave-optical interactions, Subcarrier multiplexed lightwave systems, Digital signal processing, Optical PLL, Coherent optical communications and Active microstrip patch antennas. He has published more than fifty research papers in the national and international journals of repute and symposium digests.
Dr Mondal was a participant of a international course at ICTP, Trieste, Italy and the recipients of the National Scholarship Award, the URSI Young Scientist Award and the K S Krishnan Memorial Award of IETE.
P Lahiri
P Lahiri was born on 1964 passed his M Sc degree in the year 1988 from the University of Kalyani and Ph D degree in the year 1993 from the University of Burdwan both in Physics. He joined the Physics Department of Burdwan University in the year 1990 as a Senior Research Assistant and worked in the fields of microwave oscillators demodulators, optical injection locking and control of microwave devices and detection of the subcarrier multiplexed lightwave signals. He became a Scientific Officer in the same department in 1991 and worked in the field of digital signal processing and mm-wave communication. Presently he is working in the field of optical PLL and coherent optical communication, active microstrip patch antenna-power combining, its optical control, beam steering and forming. He has published more than 45 technical papers in foreign and inland journals, national and international conferences etc. He is the recipients of International Union of Radio Sciences (URSI) Young Scientist Award and K S Krishnan Memorial Award of IETE.
A Bose
A Bose was born in the year 1969 passed his M Sc in Physics and M Phil in Microwaves in 1992 and 1993 respectively from Burdwan University. He started his research career at National Physical Laboratory, New Delhi on satellite based navigational techniques and time transfer methods. His other areas of interest include satellite & microwave communication and software. He has more than 10 papers published and presented. Currently he is working as Scientific Officer at The University of Burdwan.
S Pal
Susmita Pal (nee Biswas) was born on December 26, 1969. She did her BE (Hons) in Electronics and Communications from the Regional Engineering College, Durgapur and her ME in Electronics and Telecommunications from Jadavpur University, Calcutta respectively in 1992 and 1996. She received college prize for her performances at the BE examination. She received GATE scholarship. She received National Prize of the West Bengal Council of Higher Secondary Education. She received Sri Arabindo Scholarship while studying in school. She received the URSI (International Union of Radio Science) Young Scientist's Award in 1996. She has published seven papers in journals of repute. She received S K Mitra Memorial Award of IETE. She is working in WEBEL, Calcutta. She is presently completing her PhD work at the Electronics and telecommunication Engineering Department, Jadavpur University. Her field of interest are Fibre Optics and Microwave Photonics.