Abstract
A novel multi-band planar monopole antenna for various wireless communication applications is presented. The base of the proposed antenna is an ellipse-shaped patch that covers the ultrawideband (UWB) frequency range. To create extra frequency bands below the UWB band, two narrow quarter-wavelength strips are attached to the high concentrated current area of the patch. Two notched bands, centred at 3.5 GHz WiMAX and 5.5 GHz WLAN, are also created by similarly integrating strips to the radiation patch. The proposed multi-band antenna has a small size of 30 × 30 mm2 and covers GSM (1.77–1.84 GHz), Bluetooth (2.385–2.49 GHz) and UWB (3.1–10.6 GHz) bands. Simulated and measured results are presented and compared, which show that the antenna has omnidirectional and stable radiation patterns across the entire passband. Furthermore, good group delay and transmission characteristics can be achieved in the UWB band.
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