Bandwidth Increasing Technique Using Modified Ground Plane with Diagonal Edges

Abstract

This paper presents a bandwidth increasing technique using a modified ground plane with diagonal edges for the design of compact antennas. The proposed low-cost, compact-size circular patch antenna on 3 cm × 5.1 cm printed circuit board (FR-4) is designed and validated through simulations and experiments. Results show that with diagonal cuts at corners of the ground plane, the enhanced bandwidth can be tunable depending on the removed area. Return losses of minus 17 and minus 30 dBs for the first and second resonant frequencies, respectively, can be achieved when the depth of the diagonal cut is at optimum value of five mm, providing an 18.13% wider bandwidth (2.95–12.615 GHz) than the Federal Communication Commission (FCC) standard.

Keywords:

• Bandwidth enhancement
• Diagonal edge
• Low profile antenna
• Microstrip antenna
• Monopole antenna
• Ultra-wideband

Additional information

Notes on contributors

Niruth Prombutr

Niruth Prombutr received his B. Eng. in Electrical Engineering from Mahidol University and M.Eng. in Telecommunication engineering from Kasetsart University in Thailand, in 1998 and 2001 respectively. He is currently working towards his Ph.D. degree in Electrical Engineering at King Mongkut’s institute of North Bangkok. His current research interests include antenna, electromagnetic model and microwave circuits. E-mail: [email protected]

Phumin Kirawanich

Phumin Kirawanich received B.Eng. from Prince of Songkhla University, Thailand, M.Eng. and Ph.D. degrees in Electrical Engineering from Electrical Engineering, University of Missouri-Columbia, USA. He is currently an Assistant Professor at the Department of Electrical Engineering, Mahidol University. His research interests include photoconductive antennas, terahertz (THz) generation, pulsed power technology for bioelectrics and biomedical applications, power electronics, harmonics analysis and compensation in power systems and electromagnetic and semiconductor device physics computation. E-mail: [email protected]

Prayoot Akkaraekthalin

Prayoot Akkaraekthalin received B.Eng. and M.Eng. degrees in Electrical Engineering from King Mongkut’s institute of Technology, North Bangkok (KMITNB) Thailand, in 1986 and 1990, respectively, and the Ph.D. degree from the University of Delaware, New York, USA, in 1998. He is currently an Associate Professor at the Department of Electrical Engineering, KMITNB. His research interests include microwave circuits, antennas, and optoelectronics. E-mail: [email protected]