Design of horizontally polarized stepped slot antenna for ultra-wideband applications

Rajas Khokle, Raj Kumar and R.V.S. Ram Krishna

Journal of Electromagnetic Waves and Applications, 2013, vol. 27, issue 10, 1246-1261

Abstract: A horizontally polarized ultra wideband stepped slot antenna is proposed in this paper. First, a stepped-slot structure is fed by an L shaped microstrip feed to achieve multiple resonances. Then a parasitic slot is introduced near the vertical arm of the L-shaped feed to get better impedance matching over the bandwidth of 3.7 GHz (5.0–8.7 GHz). Further, an impedance step is introduced in the feed line and the measured −10 dB impedance bandwidth covering from 2.8 to 12.8 GHz is achieved. The measured peak gain is around 4.5 dBi throughout the band. The measured radiation patterns are bidirectional in E plane and omnidirectional in H plane. The experimental results are in close agreement with the simulated results. This antenna can be used for ultra-wideband communication devices, medical imaging and vehicular radars.

Date: 2013
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DOI: 10.1080/09205071.2013.805309

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