https://orcid.org/0000-0002-2531-6760
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Abstract
A technique of loading shorting posts on the patch has been used to enhance the directivity of a circular microstrip antenna (CMSA) in this paper. The shorting posts connected between the patch and the ground plane, force the electric field to become zero at that point, thereby modifying various modes of the circular patch. The shorting posts, also perturb the surface current distribution on the patch that help to increase its electrical size, which – in turn – enhances directivity at fixed resonance frequency. Investigations on various radii and positions of the shorting posts – to enhance the directivity of a CMSA, have been carried out. A systematic analysis on the performance of the CMSA at a lower order mode, fundamental mode and higher order mode frequencies with the loading of shorting posts has also been presented. The simulated and measured results show that the directivity of CMSA can be enhanced by up to 2 dB using the proposed technique without changing the patch geometry. In addition, the proposed antenna configuration yields, a bandwidth enhancement of almost three times as compared to that of a conventional CMSA. The simulated results of the conventional and shorted CMSA are experimentally validated with good agreement.
Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Notes on contributors
S. M. Rathod
S M Rathod has received the BE degree in electronics and telecommunication engineering from University of Pune, India in 2012. He received both M. Tech and PhD degrees in electronics engineering from Veermata Jijabai Technological Institute (VJTI), Mumbai University, India in 2015 and 2019, respectively. His thesis was in the field of compact wideband microstrip antennas. He has authored and co-authored more than 20 research papers in peer-reviewed journals and conferences. Currently, he is an assistant manager in Defence R & D Division of Kalyani Center for Technology and Innovation (KCTI), Bharat Forge Limited (BFL)-Pune. Prior to this he was an assistant professor in Electrical Engineering Department of VJTI, Mumbai. His research interests include advanced planar microstrip antennas, helical antennas and microwave components. He is an active member of IEEE Antenna and Propagation Society. Corresponding author. Email: [email protected]
R. N. Awale
R N Awale received the BE degree and ME degree in electronics engineering from Marathwada University, Aurangabad, India in 1990 and 1994, respectively. From 1990 to 1998, he was lecturer at S G G S College of Engineering & Technology, Nanded. He received a PhD from the Swami Ramanand Teerth Marathwada University, Aurangabad, Maharashtra, India in 2004; his thesis was in the field of signal and image processing and. Since 1998, he has been in the Electrical Engineering department at Veermata Jijabai Technological Institute (VJTI), Mumbai, India, where currently he is professor, and coordinator for Technical Education Quality Improvement Program (TEQIP-III). He has authored and co-authored more than 60 research papers in peer-reviewed journals and conferences. His research interests are in the areas of cross layer design for QoS for adhoc wireless networks, data security, RF and microstrip antenna, biomedical signal processing and instrumentation. He is life member of ISTE and system society of India. He has filed two patents. Email: [email protected]
K. P. Ray
K P Ray (M’93–SM’04) is MTech in microwave electronics from University of Delhi and PhD from Department of Electrical Engineering IIT, Bombay. Presently he is a professor and head of the Department of Electronics Engineering, Defence Institute of Advanced Technology (DIAT), Pune. Prior to this he was a programme director of Society for Applied Microwave Electronics Engineering and Research (SAMEER) Mumbai, wherein he joined SAMEER (TIFR) in 1985 and worked in the areas of RF and microwave systems/components and developed expertise in the design of antenna elements/arrays and high power RF/microwave sources for RADAR and industrial applications. He has successfully executed over 46 projects sponsored by Govt agencies/industries in the capacity of a designer, a chief investigator and a project manager. He was a guest/invited//adjunct faculty in EE Dept at IIT, Bombay, University of Mumbai and CEERI (CSIR) Pilani for post graduate courses. Has co-authored a book with Prof G Kumar for Artech House, USA and published over 330 research papers in international/national journals and conference proceedings. He holds 3 patents and filed three patents. He has been in advisory capacity for many international/national conferences, engineering colleges, chaired many sessions and delivered several invited talks. Has is an associate editor of International Journal on RF and Microwave Computer-Aided Engineering, John Wiley, and a reviewer of IEEE AWPS, IET (Formerly IEE, UK), International Journal of Antennas and Propagation (USA), PIERS (USA), International Journal of Electronics (USA), Journal of Electromagnetic Waves and Applications (USA), International Journal of Microwave and Optical Technology (IJMOT) USA, International Journal of Microwave Science and Technology Hindwai, AEU Elsevier, SADHNA Springer, IETE (India) and many international/national conferences and chaired many sessions. He is a senior member of IEEE (USA), a fellow IETE, and life member of Instrument Society of India and Engineers of EMI/EMC Society of India. Email: [email protected]
S. S. Kakatkar
S S Kakatkar received the BE degree in electronics engineering from College of Engineering, Pune (COEP) University of Pune, India and ME degree in microwave engineering from Indian Institute of Technology (IIT), Kharagpur, India in 1991. He joined Society for Applied Microwave Electronics Engineering and Research (SAMEER) in same year and currently, he is senior scientist and head of Atmospheric and Microwave System Division (AMSD) of SAMEER, Mumbai, Maharashtra, India. He has been working in the areas of RF and microwave systems/components and developed expertise in the design of antenna elements/arrays and high power RF/microwave sources for RADAR and industrial applications. He has authored and co-authored more than 50 research papers in peer-reviewed journals and conferences. His interests include electromagnetic theory and antenna analysis and design. Email: [email protected]