Low Side Lobe Tapered Slot Antenna with High Gain Using Gradient Refractive Index Metamaterial for Ultra Wideband Application
| Autor: | D. Vakula, Rahul Singha |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
lcsh:QC501-766 Materials science 030106 microbiology Analytical chemistry Physics::Optics Slot antenna 02 engineering and technology metamaterial Radiation pattern antenna 03 medical and health sciences Optics Side lobe 0202 electrical engineering electronic engineering information engineering lcsh:Electricity and magnetism Electrical and Electronic Engineering Wideband Reflection coefficient Beam diameter Radiation business.industry Metamaterial 020206 networking & telecommunications lcsh:QC1-999 Electronic Optical and Magnetic Materials Antenna (radio) business wideband lcsh:Physics |
| Zdroj: | Advanced Electromagnetics, Vol 6, Iss 4, Pp 63-69 (2017) |
| ISSN: | 2119-0275 |
| Popis: | A broadband gradient refractive index (GRIN) metamaterial is used to improve the gain of the tapered slot antenna. The proposed metamaterial is capable of reducing the side lobe level of the antenna. The gradient refractive index (GRIN) metamaterial is constructed by using non-resonant parallel-line unit cells with different refractive index. Due to the non-resonant structure, the proposed unit cell exhibits low loss and large frequency bandwidth. The metamaterial, whose effective refractive index is lower than that of the substrate on which the antenna is printed. Therefore, the proposed metamaterial is act as a regular lens in beam focusing. The GRIN metamaterial is integrated in front of the antenna which has the capability to manipulate electromagnetic wave accurately. The measurement results indicate that the reflection coefficient of the antenna is below -10 dB over the frequency band from 3 to 11 GHz. The radiation pattern of the antenna shows the beam width becomes narrow and directive with low side lobe level. The peak gain is increased by 2.1 dB at 9.5 GHz. |
| Databáze: | OpenAIRE |
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