A compact printed ultra-wideband (UWB) monopole antenna with dual band-notched characteristics is presented. One complementary split-ring resonator (CSRR) is etched inside the patch of the monopole antenna to achieve dual notch frequency bands. A practical example for a UWB antenna (working from 2.90 to 12 GHz) is demonstrated, with one notch frequency band at 3.40–3.48 GHz and the other at 5.40–5.98 GHz. In addition, the effect of the dimensions of the CSRR on the dual notch frequency bands is also analysed.
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Liu et al. (2008) studied this question.
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