IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
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A miniaturized planar antenna with defective ground structure for UWB applications
Dinesh VenkatachalamMurugesan Govindasamy
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JOURNAL FREE ACCESS

2019 Volume 16 Issue 14 Pages 20190242

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Abstract

Miniaturization of planar antennas is the first intention in antenna design for Ultra-Wideband (UWB) applications in which the surface wave effects reduce the antenna efficiency, gain and limit the bandwidth of microstrip antennas. The ground plane effects are minimized using a Defected Ground Structure (DGS) and multiple slots. A compact antenna size including both ground plane and radiator etched on the printed circuit board is 17 mm × 22 mm × 1.588 mm is proposed. Addition of an asymmetrical strip and cutting slots on the antenna provides an enhancement in operating bandwidth of 2.9 to 11.4 GHz for 10 dB return loss and the average radiation efficiency is 88.5% respectively. In particular, the impedance performance of the patch radiator is mainly due to the surface wave currents in the ground plane. The antenna results in an omnidirectional radiation pattern over the operating bandwidth with a gain of 2 dB and VSWR of 1 to 2.

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© 2019 by The Institute of Electronics, Information and Communication Engineers
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