Radiation through Waveguide-backed Apertures of Arbitrary Shape in a Conducting Screen

Abstract

A moment-method analysis of waveguide-backed apertures of arbitrary shape is presented. The “generalized network formulation” for aperture problems[1] has been used for formulating the problem in terms of an operator equation. Triangular patch modeling, with suitably defined basis functions, is utilized for the solution of the operator equation. Representative aperture shapes considered include rectangular, circular, elliptic, diamond, and H. Numerical results are presented for equivalent surface magnetic current, equivalent aperture admittance and antenna power gain patterns.

Indexing terms:

• Moment method
• Waveguides
• Apertures

Additional information

Notes on contributors

Dominic B O Konditi

Dominic Onyango Konditi, was born in Kochia, Homa-Bay District, Kenya, on July 22, 1950. He received the Higher Diploma from Mombasa Polytechnic (Kenya), the MSc Degree from Tottori University (Japan), both in Electrical Engineering, in 1983 and 1991, respectively, and the PhD degree in Electronics and Computer Engineering from Indian Institute of Technology (IIT) Roorkee (India) in 2000.

From January 1975 to February 1981, he trained and worked with the Kenya (formerly, East Africa) Posts and Telecommunications Corporation as a radio technician. Since January 1983, he has been with Jomo Kenyatta University of Agriculture and Technology (formerly, Jomo Kenyatta College Agriculture & Technology) in the Department of Electrical and Electronic Engineering and is currently a Senior Lecturer teaching various subjects such as Circuits and Network Theory, Electromagnetics, Microwaves Antennas and Propagation. He has also been appointed external examiner for Moi University in the Department of Electrical & Communications Engineering for a period of three years from November 2001

Dr Konditi is a founder member of Kenya Society of Electrical and Electronics Engineers (KSEEE). His research interest is in the area of applied electromagnetics dealing specifically with numerical modelling of micro-wave and millimeter-wave antennas, electromagnetic compatibility (EMC) and electromagnetic intereference (EMI) problems.

Sachendra N Sinha

Sachendra N Sinha, was born in Dehradun, India on March 19, 1948. He received the BE degree in Electronics and Communication, ME degree in Microwaves and Radar, and PhD degree in Electronics and Communication from the University of Roorkee, India in 1972, 1974 and 1984, respectively.

In 1974, he joined the Department of Electronics and Computer Engineering, University of Roorkee (Now known as Indian Institute of Technology Roorkee), India, where he is currently a Professor and Chairman of the Undergraduate Academic Programme. His research interests are primarily in the areas of computational electromagnetics, microstrip antennas, and indoor wireless communication. He has carried out several consultancy and sponsored research projects for the Department of Space, Ministry of Information Technology, Defense Research and Development Organization, Council for Scientific and Industrial Research, University Grants Commission and All India Council for Technical Education.

Dr Sinha is Fellow of Institution of Electronics and Telecommunication Engineers, a Fellow of Institution of Engineers, a Senior Member of Institute of Electrical and Electronics Engineers (USA), and a Member of Indian Institute of Public Administration.