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A novel compact planar printed antenna is designed and analyzed for ultrawideband wireless applications. The proposed antenna is constructed by a circular patch with a circular split‐ring slot gradually varying the width, a U‐shaped slot, a small strip slot, and a segmental ground plane with three slits. To broaden the bandwidth and produce notches, three different type slots are incorporated in the antenna radiating patch, and multiple slits are embedded onto the defected ground plane. The simulated and measured results show that the antenna yields a wider bandwidth ranging from 2.9 to 13.0 GHz (the return loss less than −10 dB) with the three notched bands of 3.30–3.70 GHz (WiMAX band), 4.50–4.83 GHz (Receiving frequency for INSAT/Super‐Extended C‐band), and 6.67–7.15 GHz (Transmitting frequency for INSAT/Super‐Extended C‐band). Furthermore, the proposed antenna has achieved average peak gain of 5.50 dBi and stable quasi‐omnidirectional radiation patterns.
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Tang et al. (2015) studied this question.
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