TRIPLE BAND-NOTCHED PLANAR UWB ANTENNA USING PARASITIC STRIPS

A compact planar ultra-wideband (UWB) antenna with triple band notch characteristics is proposed in this paper. The antenna consists of a rectangular radiating patch and a modified partial ground plane, and has an overall dimension of 24 mm × 22 mm. Three resonant elements are placed above the ground plane to generate three notch frequency bands separately in the WiMAX, the lower WLAN and the upper WLAN frequency bands. The proposed antenna successfully simulate, prototyped and measured. Effects of the key deign parameters on band notch characteristics are also investigated. The realized antenna achieved an operating bandwidth (VSWR ≤ 2) ranges from 2.9 to more than 11 GHz with triple notched bands of 3.26-3.71 (12.9%), 5.15-5.37 (8.5%), and 5.78-5.95 (2.9%) GHz. Measured flat transfer function and constant group delay within the operating band except at notched bands makes the proposed antenna suitable for being used in practical UWB applications.