Directive Beam of the Monopole Antenna Using Broadband Gradient Refractive Index Metamaterial for Ultra-Wideband Application
| Autor: | D. Vakula, Rahul Singha |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
lens
General Computer Science Physics::Optics 02 engineering and technology metamaterial law.invention Radiation pattern 03 medical and health sciences 0302 clinical medicine Optics law 0202 electrical engineering electronic engineering information engineering General Materials Science Dipole antenna Monopole antenna Omnidirectional antenna Physics subwavelength Directional antenna gradient refractive index business.industry General Engineering 020206 networking & telecommunications Lens (optics) Gradient-index optics lcsh:Electrical engineering. Electronics. Nuclear engineering business lcsh:TK1-9971 030217 neurology & neurosurgery Metamaterial antenna |
| Zdroj: | IEEE Access, Vol 5, Pp 9757-9763 (2017) |
| ISSN: | 2169-3536 |
| DOI: | 10.1109/access.2017.2703876 |
| Popis: | This paper introduces a novel technique to enhance the gain of the basic monopole antenna by using broadband gradient refractive index (GRIN) metamaterial. The proposed GRIN is designed by using a parallel-line unit cell metamaterial with different refractive index. A seven GRIN lens is placed on the omnidirectional printed basic monopole antenna, perpendicularly. Due to the non-resonant and subwavelength properties of the parallel-line elements, the proposed GRIN metamaterial lens has a broad bandwidth property with low loss. The simulation and measurement results confirmed that the beam is more directive with narrow beam width. The measured reflection coefficient of the GRIN antenna is below -10 dB over the frequency bandwidth of 3.4-11 GHz. Due to GRIN lens, the peak gain of the basic monopole antenna is increased by 5.3 dB at 8.8 GHz. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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