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Abstract
Different types of slot configurations in one of the walls of rectangular waveguides are analyzed by different researchers. In this paper different configurations of inclined I-slot radiators have been investigated and analysed. The analysis consists of evaluation of admittance characteristics of the slot as a function of slot parameters and frequency. Slot admittance characteristics are obtained from the concepts of self-reaction and discontinuity in modal current. On the other hand, coupling and VSWR are evaluated from the shunt equivalent network parameter making use of transmission matrix approach. The variations of normalized conductance, susceptance, coupling and VSWR as a function of frequency are presented. The advantage of such types of slots is that the entire slot geometry is confined only to narrow wall.
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Notes on contributors
K Padma Raju
K Padma Raju received BTech from Nagarjuna University and MTech from NIT—Warangal. He is in the faculty of Electronics and Communication Engineering, College of Engineering, Kakinada, JNTU since 1992. Presently, he is working in the fields of Electromagnetics and Radar Antennas and submitted his thesis for the award of PhD in Andhra University. He has published 15 technical and research papers in Journals/Proceedings of National and International conferences
His fields of interest are Applied Electromagnetics, Antennas, Microwave Communications and EMI/EMC etc
G S N Raju
GSN Raju received his BE, ME with distinction and first rank from Andhra University and PhD from IIT, Kharagpur. He is Professor of Electronics and Communication Engineering in Andhra University, College of Engineering, Visakhapatnam. He has guided eleven PhDs in the field of Antennas, Electromagnetics, EMI/EMC and Microwave and Radar Communications. He has published 150 technical papers in National/International journals/conference proceedings including IEEE (USA), IEE (UK), IETE (India), AMSE (France) Journals and transactions
He is the recipient of ‘Best Teacher Award’ from Hon'ble Chief Minister, Shri N Chandra Babu Naidu and ‘The Best Research Award’ from Hon'ble Governor of Andhra Pradesh Shri K Krishnakanth in 1994. He was a visiting professor in the University of Paderborn and Karlsruhe, Germany in 1994. Dr Raju was Head of the Department of Electronics and Communication Engineering, AU during 1992–95. He holds the positions of Associate Editor of National Journal of EMC since 1995. Chairman, Board of Studies in ECE, EIE, Chairman IETE, Visakhapatnam Centre since 2002. Chairman, Society of Electromagnetic compatibility Engineers since 1993. Member, Board of Studies in Electronics and Communication Engineering in Sri Venkateswara, JNTU, and Kakatiya Universities. Convenor/Member of AICTE Expert Committee since 1994. Member, National Board of Accreditation, AICTE since 1998. Coordinator, Centre for Bio-Medical Engineering, Andhra University since 2003. Convenor of several expert committees of Andhra University
His fields of interest are Antennas, Wave propagation, Radar and Microwave Communication, Electromagnetics, EMI/EMC, Electronic Device, Circuits and Bio-Medical Instrumentation
S Mohapatra
RADM S Mohapatra VSM was born on 1st July, 1945 at Hatuary in the District of Bhadrak in Orissa State. He graduated in Electrical Engineering from Burla Engineering College, Sambalpur and commissioned into the Indian Navy in 1966
He was Electrical Officer in Indian Navy on board ships, General Manager Naval Dockyards, Chief Organizer CHOGAM at Goa, Commanding Officer INS Valsura, At NPOL, Kochi. He led a Project for developing Marine Acoustic Research Ship named as SAGARADHVANI for exlusive use of oceanic experiments
Rear Admiral Mohapatra has motivated a vibrant scientific group at NSTL and extended his professional services to IETE Visakhapatnam by establishing a full flaged centre with more than 200 life members and established an independent IETE building under his chairmanship
Ajoy Chakraborty
Ajoy Chakraborty received his BTech, MTech and PhD Degrees from IIT, Kharagpur. He is presently Senior professor in the Department of E&ECE, IIT, Khargapur. He was visiting professor University of Syracuse, USA. Prof Chakraborty guided several PhDs and published more than 100 research papers in IEEE, IEE, IETE, EMCE Journals/Transactions/Proceedings
He is the chief consultant and chief investigator of several projects funded by ISRO, DRDO etc. He is member of Board of Studies of many Universities in the country. He is convenor/member of AICTE expert committees and also a member of National Board of Accreditation, AICTE
His fields of research and teaching interests are Phased Array Radars, Applied Electromagnetics, EMI/EMC, Microwave Circuits and Systems and Analytical and Numerical techniques