Investigation of metamaterial antenna designs for multi band Applications

Abstract

The rapid growth in wireless communication sector necessitated the newlinedesign of compact devices. Development of Multifunctional compact devices newlineare the major demand of industries. The industrial requirement projects the newlineneed for scaled down antenna operating in multiple frequency bands. The newlinemicrostrip patch antenna has attracted the research group due to its low cost, newlineand easy fabrication similar to Printed Circuit Boards (PCB). newlineHigh dielectric substrates are normally used for the design of newlinecompact antennas. Metamaterial, addition of slot structures and EBG newlinestructures can be used for miniaturized multifunctional antenna design. The newlinegeometrical modification of antenna structure alters the current path in the newlinepatch of antenna and supports multiple resonant frequencies. The effect of newlineslots and metamaterials increases the electrical length of antenna and supports newlinemultiband resonance. Metamaterials have captured the attention of antenna newlinecommunity. The artificially engineered metamaterials possessing negative newlinerefractive index are used for compact antenna design. newlineEfforts are made in this thesis to design antenna structures with newlineslots and metamaterials to achieve multiband operation with reduced return newlineloss. The antenna satisfying high performance and directional radiation newlinecharacteristics are investigated. This thesis focuses on the investigation of newlinemetamaterial-based compact antenna satisfying multifunctionality with newlineenhanced performance and radiation characteristics. The parallel slot pair in newlinethe basic microstrip patch antenna with omega shaped metamaterial operating newlinein three low frequencies centered at 2.03 GHz, 3.47 GHz and 5.96 GHz are newlinereported. newline