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Islam, Mohammad Tariqul
- A New Direct Retrieval Method of Refractive Index for the Metamaterial
Abstract Views :257 |
PDF Views:89
Authors
Affiliations
1 Space Science Centre (ANGKASA), Research Centre Building, Universiti Kebangsaan Malaysia, Bangi, Selangor D.E., 43600, MY
2 Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, Bangi, Selangor D.E., 43600, MY
1 Space Science Centre (ANGKASA), Research Centre Building, Universiti Kebangsaan Malaysia, Bangi, Selangor D.E., 43600, MY
2 Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, Bangi, Selangor D.E., 43600, MY
Source
Current Science, Vol 109, No 2 (2015), Pagination: 337-342Abstract
With the advent of metamaterial the approaches of automated extraction of effective parameters for a metamaterial have recently attracted considerable attention among researchers. Evaluation of refractive index has received huge importance especially for the left-handed metamaterial. This communication presents a new simplified equation for the direct retrieval of refractive index from the transmission and reflection co-efficient. Refractive index is calculated from the new equation for two recently published metamaterials. The resultant curve for the proposed method shows good conformity with the classical NRW-method and shows a result closer to that achieved using the TR-method. In addition, a comparative study of the three methods is presented.Keywords
Metamaterials, Nicolson–Rose–Weir Method, Transmission–Reflection Method.Full Text
- Improved Square-Z-Shaped DNG Meta-Atom for C- and X-Band Application
Abstract Views :224 |
PDF Views:86
Authors
Affiliations
1 Space Science Centre (ANGKASA), Universiti Kebangsaan Malaysia, Bangi 43600, MY
2 Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, Bangi 43600, MY
1 Space Science Centre (ANGKASA), Universiti Kebangsaan Malaysia, Bangi 43600, MY
2 Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, Bangi 43600, MY
Source
Current Science, Vol 114, No 12 (2018), Pagination: 2518-2524Abstract
An improved dual-band square-Z-shaped meta-atom is presented. It shows a bandwidth of 3.61 GHz, where the operating frequency ranges from 2.0 to 14.0 GHz. The meta-atom is split in such a way that it appears as a square-Z-shaped structure and is printed on an epoxy resin fibre substrate material. The dimensions of the single unit cell and array structure are respectively, 10 x 10 mm2 and 200 x 150 mm2. Also the unit cell and 1 x 2, 2 x 2 and 4 x 4 arrays are studied for double negative characteristics. CST Microwave Studio 3D-electromagnetic simulator is used to design and perform investigation. The performance of a meta-atom unit cell is measured by wave guide ports. The measured and simulated results matched well and are applicable for C- and X-band applications.Keywords
Double Negative Meta-Atoms, Dual-Band, Effective Medium Ratio.Full Text
References
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