Abstract
A compact planar ultra-wideband (UWB) antenna with triple band notch characteristics is proposed in this paper. The antenna consist a rectangular radiating patch, a modifled partial ground plane, and has an overall dimension of 30 £ 22mm 2 . 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 antennas are successfully simulated, prototyped and measured. Efiects 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 11GHz 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 ∞at transfer function and constant group delay within the operating band except notched bands make the proposed antenna suitable for being used in practical UWB applications.
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