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Bandwidth Increasing Technique Using Modified Ground Plane with Diagonal Edges

Author(s): Prombutr Niruth | Kirawanich Phumin | Akkaraekthalin Prayoot

Journal: IETE Journal of Research
ISSN 0377-2063

Volume: 55;
Issue: 5;
Start page: 196;
Date: 2009;
Original page

Keywords: Bandwidth enhancement | Diagonal edge | Low profile antenna | Microstrip antenna | Monopole antenna | Ultra-wideband.

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 x 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.
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