Design of Compact Multiband EBG and Effect on Antenna Performance
نویسندگان
چکیده
This paper presents the design of Electromagnetic Bandgap (EBG) structure using fractals geometry and its effect on antenna performance. The EBG structure has been designed on substrate єr = 4.3 and thickness h = 1.53 mm. The 1 iterative EBG structure offers the surface wave attenuation around 20 dB down from 2.94 GHz to 4.58 GHz corresponds to 43.62% bandwidth. The experimental results of 2 iterative EBG structure revealed the surface wave attenuation in two bands from 2.45 to 3.36GHz and 8.52 to 11.02 GHz respectively. The surface wave suppression bandwidth for both the bands is 31.325% and 25.59 % respectively. The antenna design with the proposed EBG exhibits improvement in the bandwidth by 3.64%, gain by 3.2 dB and front to back ratio by 15.36 dB in comparison of antenna without EBG. Intex Terms — Electromagnetic Band Gap (EBG), Antenna, Bandwidth, Resonant Frequency , Surface wave attenuation
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