volume | PIER Journals

Abstract

This research article presents a compact planar antenna and a method for bandwidth improvement using parasitic resonant structure for UWB application with dual notch band performance, which are adjusted with an empirical formula. The radiating element of the microstrip square patch is slotted with two identical inverted J-shaped slots at the two non-radiating edges, a reversed F-shaped slot in the slotted radiating element, so that dual notch bands are excited. The bandwidth of the microstrip square patch radiator is improved with the help of a dumbbell-shaped parasitic resonant structure which is placed on the upper to partial ground plane for UWB application. The antenna, with size of (12×16 mm²), is fabricated on an epoxy FR-4 dielectric substrate of 1.6 mm thick and experimentally validated. The simulated and experimental results show that the invented radiator covers operating bandwidth from 2.8 to 13 GHz with VSWR < 2 and omnidirectional radiation characteristics. The two notch bands (3.3-4.2 and 5.1-5.4 GHz) are excited in the wide bandwidth by suppressing any interference from IEEE 802.16 WiMAX (3.3 GHz-3.6 GHz), C-band (3.7 GHz-4.2 GHz) and IEEE 802 11 a lower WLAN (5.15 GHz-5.482 GHz) with VSWR > 5.

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Dr. Swarnaprava Sahoo

Dr. Mihir Narayan Mohanty

Dr. Laxmi Prasad Mishra