Abstract
A multiresonance and UWB monopole antenna with frequency band-notched function in 7.25–7.75 for downlink of X-band satellite communication systems is presented.Proposed antenna consist of a square radiating patch with a pair of L-shaped slots, a feed-line with an E-shaped step-impedance resonator (SIR) slot, and a ground plane with a pair of L-shaped conductor-backed plane. In this design, by cutting a pair of modified L-shaped slots with variable dimensions on the radiating patch and also by inserting a pair of L-shaped conductor-backed plane, additional resonances are excited and hence much wider impedance bandwidth can be produced especially at the higher band 125% (2.95–13.36). To achieve a band-notched function an E-shaped SIR slot was inserted in the feed-line. Simulated and experimental results obtained for this antenna show that it exhibits good radiation behavior within the UWB frequency range. The designed antenna has a small size of 12 × 18 mm2. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:922–926, 2013; View this article online at wileyonlinelibrary.com. DOI: 10.1002/mop.27456
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