2013
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Item Design and Analysis of Microstrip Patch Antenna Loaded with Innovative Metamaterial Structure(Department of Electrical and Electronic Engineering, Islamic University of Technology (IUT), Board Bazar, Gazipur-1704, Bangladesh, 2013-11-15) Ahmed, RazinTechnology has evolved constantly over the years where the demand of Microstrip Patch Antenna (MPA) has been growing tremendously. This is mostly due to their versatility in terms of possible geometries that makes them applicable for many different situations. The lightweight construction and the suitability for integration with microwave integrated circuits are basic advantages. Additionally the simplicity of the structures makes this type of antennas suitable for low cost manufacturing. Besides all benefit, these antennas have major drawbacks such as narrow bandwidth, low efficiency, and low gain. Recently Ku band frequency range of (12-18) GHz has been studied vigorously for allocation of satellite communication, which became the most demanding subject around the world in last few decades. But researchers are facing difficulty to improve both bandwidth and gain in same MPA under this band which leads to examine and investigate for further enhancement. In last decade a new man made material has been discovered known as metamaterial and it has already drawn attention to antenna researchers. This advance material depicts unusual electromagnetic properties which are not available in nature, such as negative permittivity (εr) and permeability (μr). Due to its amazing feature, it has the capacity to enhance antenna characteristic rapidly. The primary objectives of this thesis is to exploit these exceptional properties of metamaterial in designing suitable MPA for better bandwidth and gain antenna characteristic that can operate under Ku band. In this thesis a series of MPAs have been designed in chronological order to achieve desirable objectives. Among them E slotted E shaped patch loaded with metamaterial antenna (proposed antenna) shows better improved characteristics. The intended design and feeding technique provides the antenna to operate at Ku band range with approximately total 4.40 GHz bandwidth which covers 73.33% of this domain. The proposed antenna resonates at 14.97 GHz with total field directivity 9.4 dBi. This thesis also contains four particular Microstrip patch antenna design including proposed antenna with a brief comparative study between them where effect of different antenna parameters are studied.