A compact triple-band monopole antenna covering WLAN/WiMAX bands is investigated in this Paper. The proposed antenna has a compact size of 36 x 25 mm2 and consists of a circular ring, a split ring radiator and a trapezoid coplanar waveguide-fed structure. The antenna covers three distinct bands of 2.27-2.55 GHz, 3.23-4.14 GHz, and 5.08-6.03 GHz for WLAN and WiMAX applications. To validate the proposed design, prototype is fabricated, and measurement is carried out. Good performances of gain, radiation pattern and efficiency have also been obtained.
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