The dual tunable band-notched characteristics are achieved on a novel printed monopole antenna operating over 2.6–11 GHz bandwidth with VSWR < 2, to minimize potential interference with the bands of 3.3–3.7 GHz for WIMAX and 5.15–5.825 GHz for WLAN. Two notched-bands are created by the two slots etched in its radiation patch and ground plane, respectively. Their central frequencies can be easily tuned individually by placing a capacitor and an inductor on each of the slots. The antenna has been simulated, measured and discussed. The measured results agree reasonably with the simulated ones, showing good impedance matching, stable gain, small group delay, and near omnidirectional patterns in the H-plane across the operation band. The designed antenna has the miniature dimension of 18 mm × 18 mm × 0.8 mm.
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Xia et al. (2010) studied this question.
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