کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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847162 | 909221 | 2016 | 5 صفحه PDF | دانلود رایگان |
In this article, Metamaterial layer is implemented to improve radiation characteristic of dipole antenna at THz domain. Also, cavity back reflector is studied in order to gain enhancement and pattern shaping; in fact, combination of both structures is known as Fabry–Perot cavity. Return loss is modified at 486–654 GHz for less than −10 dB and also Q factor is calculated in presence of Metamaterial layer. The absorption and shield factors are simulated and showed at 0.55 THz. Antenna gain is increased more than 120% and bandwidth is amended around 82%. By achieved simulation result, −14.85 dB shield factor is obtained for proposed metamaterial layer. The dipole antenna contains silver line on silicon lossless material with n = 2.43 and the plasmonic layer is modeled by deposition of silver wire in silicon. In addition, Glass (n = 1.65) and SiN (n = 1.87) are used for metamaterial part and it is shown that increase in the permittivity leads to decrease the plasmonic permittivity; thus, more bandwidth of the structure is obtained. Also, effect of change in radius of the metamaterial micro wire on bandwidth of the antenna is considered.
Journal: Optik - International Journal for Light and Electron Optics - Volume 127, Issue 13, July 2016, Pages 5181–5185