In this paper, a novel UWB (ultra‐wide bandwidth) antenna having a frequency band notch is presented. The ring‐slot is used to change the current distribution and realize the frequency notch function. The measured return loss less than −10.0 dB is from 3.1 to 5.0 GHz and from 6.0 to 10.6 GHz, and the frequency notch band is from 5.15 to 5.825 GHz. The simulated gain changes between 2.0 and 6.5 dB within the pass band and varies between −1.5 and 1.0 dB within the band‐notched part.
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Sheng et al. (2007) studied this question.
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