Abstract
A compact printed ultrawideband (UWB) antenna with dual band-notched characteristics is proposed for UWB integration communication system. The presented design, having a total size of 30 × 25 mm, consists of a folded fork-shaped radiator fed by a microstrip line and a modified ground plane with trapezoid-shaped slots on its top edge, which can effectively increase the bandwidth of the proposed antenna. To avoid potential interferences, a straight, open-ended quarter-wavelength slot and a semicircular half-wavelength slot are etched in the radiating patch to generate dual notched bands in 3.3–3.6 GHz for WiMAX and 5.15–5.825 GHz for WLAN. Lumped-element equivalent circuit model is carried out to comprehend and predict the dual band-notched properties. Good agreement is achieved between the simulation and measurement, which shows that the proposed antenna provides an impedance bandwidth of more than 145% between 2.7 and 17 GHz, two independently controllable notched bands and good omnidirectional radiation patterns.
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