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Abstract-A novel compact multi-band design of planar C-shape monopole antenna with inverted L-shape parasitic strip is proposed for IEEE 802.16 m WiMAX system.The obtained impedance bandwidth across the 2.6/3.5/5.5 GHz operating bands can reach about 240/570/4470 MHz, respectively. Only with the antenna size of 15 × 30 × 0.8 mm 3 , the proposed monopole antenna has the compact operation with more than 25% antenna size reduction. The measured peak gains and radiation efficiencies are about 1.6/1.9/2.9 dBi and 91/96/94% for the 2.6/3.5/5.5 GHz operating band, respectively, with nearly omni-directional pattern in the XY -plane.

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