A comparative study on different types of metamaterials for enhancement of microstrip patch antenna directivity at the Ku-band (12 GHz)

Abstract

This paper proposes improving the directivity of microstrip patch antennas (MPAs) by using metamaterials.Four different metamaterial types are used as a flat lens in front of the MPA, respectively, which are tuned to 12 GHz (Ku-band) resonance frequency. Thus, it can be decided which metamaterial is more proper for antenna directivity enhancement at this band. One additional new metamaterial structure is proposed in this paper, which is called a Euro-shaped resonator, and other metamaterials used are the triangular split ring resonator, symmetrical ring structure, and split ring resonator. The permeability and permittivity of metamaterials are extracted from the S parameters by using a robust method. Microwave Studio by Computer Simulation Technology is used for modeling and simulation.The MPA and metamaterials are fabricated, and measurements are performed in the Yıldız Technical University RF and Microwave Laboratory. It is observed that measured results are in close agreement with the computer simulations.

CNT Conductive Epoxy Composite Metamaterials: Design, Fabrication, and Characterization

“…Using classical transmission line theory and the scattering parameters detected from the VNA, the samples were characterized in terms of absorbance, reflectance, and transmittance. The overall results showed that CNT/PANI composites proved useful for microwave absorption purposes over the Ku-Band in the microwave frequency range (12)(13)(14)(15)(16)(17)(18), with shielding effectiveness up to 28% [4].…”

“…The increased energy is exhibited in the form of increased temperature, as some of absorbed energy turns into heat. In a metamaterial, the EM properties of the sample depend less on the material composition, and more on the structured design and geometry of the metamaterial sample [10,[13][14][15]. The metamaterial patterns must be smaller than the wavelength of incident EM radiation.…”

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