Wideband Rectangular Slot Antenna with 3.5 GHz Notched Band

This paper presents the wideband rectangular slot antenna with 3.5 GHz notched band. The designed antenna consists of radiating rectangular slot, an exciting semicircle patch with the CPW-Fed and two L shaped slits on the top plane of slot antenna, so the notched band was obtained. The proposed antenna can support a wide band frequency range which covers the WLAN/WiMAX standard. The two L shaped splits were rejecting the undesired resonant frequency at 3.5 GHz. The measured results shown that the designed antenna provided the two impedance bandwidths; the first band is from 2.15 – 3.40 GHz, the second band is from 3.60-7.72 GHz, and the band notching from 3.41– 3.59 GHz. The radiation patterns of designed antenna present omni-directional in xz plane and bi-directional in yz plane. Thus, the proposed antenna can be used efficiently for the WLAN/ WiMAX applications.