Normal Mode Helical Antenna on Small Circular Ground Plane

ABSTRACT

In this paper, it has been shown that input impedance matching for the Normal Mode Helical Antenna (NMHA) can be obtained by using a small circular ground plane (radius $\approx$ λ/20) without any external impedance matching network. It also discusses the effect of the finite circular ground plane radius, the radius of wire on the input impedance, resonance frequency, and bandwidth of the NMHA. Further, the effects of different ground plane shapes and cupped shape ground plane bending in upward and downward directions on input impedance matching are presented. A prototype of NMHA has been fabricated to operate around 1.8 GHz and the measured results are in good agreement with the simulated results.

Keywords:

• Helical antenna
• Impedance matching
• Normal mode
• Small circular ground plane

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Suman P. Wadkar

Suman P Wadkar received her BE degree from Karnataka University and ME degree from the University of Mumbai in electronics and telecommunication. She is currently pursuing her PhD at the University of Mumbai. Her research interests include helical antenna and planar microstrip antennas.

B. G. Hogade

Balaji G Hogade received PhD in EXTC (smart antenna for wideband wireless networks) from NMIMS Mumbai in 2014, ME in power electronics from Gulbarga University, Karnataka, in 1999, BE in electronics from Marathwada University Aurangabad in 1991. He is Professor in Electronics Engineering Department in Terna Engineering College, University of Mumbai. He has guided a number of projects and thesis in graduate and post-graduate level program. Currently, Guiding 5 PhD students in Mumbai University. He has produced several national and international publications. He was a Member of BOS in Electronics Engineering and Electrical Engineering in the University of Mumbai. His research interests include wireless network, smart antenna, and power electronic and drives. Email: [email protected]

S. M. Rathod

S M Rathod received the BE degree in electronics and telecommunication engineering from University of Pune, Pune, India and the MTech degree in electronics engineering from Veermata Jijabai Technological Institute, Mumbai University, Mumbai, India in 2012 and 2015, respectively. Currently, he is pursuing the PhD degree in Electronics Engineering Department at Veermata Jijabai Technological Institute, Mumbai. His research interests include planar microstrip antennas and a helical antenna. Email: [email protected]

Hemant Kumar

Hemant Kumar obtained his bachelor’s degree (BTech with Honors) in electronics and communication engineering from Kurukshetra University, Haryana in 2010. After BTech, he worked as a Lecturer from July 2010 to June 2011 and as a Guest Lecturer in 2012. In January 2013, he joined direct PhD program in the Department of Electrical Engineering at Indian Institute of Technology Bombay (IIT Bombay), Mumbai, where he was associated as a Teaching Assistant (TA) for several courses. He received the PhD degree with a thesis entitled “Broadband Antennas and Monopulse Tracking” in February 2018. Currently, he is working as a Research Associate at IIT Bombay. His research interests include broadband antennas, microstrip antennas and arrays, passive microwave circuits, monopulse tracking radar, and substrate integrated waveguide. Email: [email protected]

Girish Kumar

Girish Kumar received his PhD degree in electrical engineering from IIT Kanpur in 1983. From 1983 to 1985, he was a Research Associate in the Electrical Engineering Department, Univ. of Manitoba, Winnipeg, Canada. From 1985 to 1991, he was an Assistant Professor in the Electrical Engineering Department, Univ. of North Dakota, Grand Forks, USA. Since 1991, he is at IIT Bombay, where he is currently a Professor in the Electrical Engineering Department. His areas of interest are: antennas, microwave circuits, and systems. He has published more than 270 papers in the international and national journals and conference proceedings. He is the author of the two books and has filed 5 patents. He has been working on hazards of microwave radiation for the last one decade. He has written several reports and given presentations at various forums on the topics related to Cell Phone and Tower Radiation Hazards and Solutions. He is also chairman of the company “Wilcom Technologies Pvt. Ltd.”, which is an IIT Bombay incubated company formed through the Society for Innovation and Entrepreneurship (SINE). Email: [email protected]