Abstract
A novel compact microstrip slot antenna applied to WLAN/WiMAX applications is presented. The proposed antenna consists of a trapezoid and ellipse slot, a pair of symmetrical inverted L-strips, an elliptical-arc-shaped stub and a monopole radiator. By adjusting the dimensions and positions of these structures, the antenna can efiectively generate three difierent resonances to cover the WLAN/WiMAX bands while maintaining small size and simple structure. Based on this concept, a prototype of the proposed antenna has been successfully fabricated and measured. The experimental and numerical results show that the antenna has impedance bandwidth with 10dB return loss of 360MHz (2.33{2.69GHz) and 2630MHz (3.24{5.87GHz), which can cover both the WLAN 2.4/5.2/5.8GHz bands and the WiMAX 2.5/3.5/5.5GHz bands. In addition, good monopole-like radiation characteristics with su-cient antenna gains are obtained over the operating bands.
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