A Comparison between WMET & WHMET Serrated CATRs

Abstract

A compact range is a facility used for the measurement of antenna parameters. It offers many advantages over other types of ranges and consequently a lot of effort is being directed towards the improvement of compact range performance. CATR performance can be further improved by using serrations. Serrated edge CATR is used to reduce the diffraction effect. Performance of several serrations viz; triangular, exponential, rectangular, on off triangular and width modulated triangular have been analyzed earlier. The Fresnel field of a plane square aperture reflector employing (a) width modulated exponential and width modulated triangular serrations (b) width and height modulated exponential and width and height modulated triangular serrations is analyzed in this paper. Lesser ripple is observed in quiet zone field in case (a) and case (b) for different values of width modulation factors. By proper selection of width modulation factors very low ripple is observed in quiet zone with case (b) than case (a).

Indexing terms:

• Fresnel zone field
• Quiet zone
• CATR
• Serration
• Width modulation factors
• Physical optics

Additional information

Notes on contributors

P Siddaiah

P Siddaiah obtained his BTech degree in Electronics & Communication Engineering from JNTU College of Engineering, Ananthapur in 1988. He received his MTech degree from SV University, Tirupathi.

He started his career as lecturer at RVR & JC College of Engineering, Guntur in 1993. At present Mr Siddaiah is working as an Assistant Professor in the department of Electronics and Communication Engineering. He has taught a wide variety of courses for UG students and guided several projects. He significantly contributed to the development of Microwave and Advanced Communication Laboratory and establishment of Communication system in the College campus.

He is the member of Board of Examiners for several Universities. As resource person, he is associated with several Engineering Colleges in the conduct of summer courses.

He has published several papers in National and International Journals and presented papers at conferences. His areas of interest include Communications, Antennas and Digital Signal Processing. He is the life member of ISTE and Institution of Engineers (India).

P V Subbaiah

P V Subbaiah has obtained his Bachelor's Degree in ECE from Bangalore University in 1980, Master's Degree in Control Systems from Andhra University in 1983. JNTU, Hyderabad has conferred PhD Degree on PV Subbaiah for his work in the area of Microwave Antenna Test Facilities in 1995.

He joined VR Sidhartha Engineering College, Vijayawada as Lecturer in ECE in 1984 and elevated as an Assistant Professor in 1990. At present he is the Professor and Head of ECE Department at VR Siddhartha Engineering College.

Dr Subbaiah has taught a wide variety of courses for UG and PG students and guided several projects. He has been the Co-ordinator of several DRDO sponsored research projects. He was the Co-ordinator of two workshops at National level. He is closely associated with the Professional Bodies such as IETE, IE(I), ISTE in various capacities as Chairman, Hon Secretary and Member of the Executive Committee. He has published several papers in the National/International Journals of repute and presented papers at Conferences. His areas of interest include Microwave Antennas, Optical Communication and Electronic Instrumentation.

He was the recipient of Sir Thomas Ward Memorial Prize for the year 1989–1990 for his paper published in the Journal of The Institution of Engineers (India)

He is the Fellow of IETE and IE (I). He is the Life Member of ISTE, BMESI and EMCSI.