A new compact design of monopole antenna for triple-band WLAN/WiMAX applications with two band-notches based on\nbroadband antenna is presented. By introducing a stub loaded ground and two new paper clip structures etched on radiation patch,\na compact overall dimension 31mm Ã?â?? 33mm Ã?â?? 1mm and three separated operating bands effectively covering 2.4/5.2/5.8GHz\nWLAN bands and 2.5/3.5/5.5GHz WiMAX bands can be achieved. Compared with familiar U type slot, the introduced compact\npaper clip structure can save about 37% of dimension regions, which could effectively improve efficiency of band-notch formation.\nSimulated and measured results demonstrate that the proposed antenna has good dipole-like radiation characteristics with\nappreciable gain across the operating bands. Besides, main parameters of the two etched paper clip structures are investigated\nto control the positions and bandwidths of the two stop-bands, respectively, on basis of which the three working bands can be\nadjusted independently.
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