Roohollah Haghpanahan
Start date: 01 February 2010
Email: roohollah.haghpanahan@brunel.ac.uk
Supervisor: Dr. R. Nilavalan
PhD Research Title: Metamaterial Antenna
There have been increasing interests in metamaterials in the past 10 years in the scientific communities. Metamaterials are sometimes called left-handed materials or negative refractive index materials. Metamaterials are inherently artificial materials and cannot find in nature.
Recently, the metamaterial is defined as “a material which gains its properties from its structure rather than directly from its composition”. The above definition reflects certain natures of metamaterial, but not all. Actually, a metamaterial is a macroscopic composite of periodic or non-periodic structure, whose function is due to both the cellular architecture and the chemical composition.
In our research progress, our aim is to improve small profile antenna performance by taking advantages of metamaterial properties. To achieve this goal deep understanding of field and wave electromagnetic as well as photonic crystal structure, effective medium approach and optical transformation are required.
To design a metamaterial element we need to define spatial distribution of the material parameters related to the desired function of the metamaterial. In particle design level the geometric parameters of the metamaterial particles for each set of material parameters are optimised. The output level incorporates all the different metamaterial particles whose dimensions are determined by previous level and generates integrated masks for fabrication.
Algorithm Simple layout
