Design Of Parasitic Meander Line Antenna At ISM Band

Nagarajan, Saysoo (2011) Design Of Parasitic Meander Line Antenna At ISM Band. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This report proposes the design of Parasitic Meander-line Antenna at ISM band which operates at frequency of 2.4 GHz. The ISM band used is 2.45 – 24.125 GHz. The meander line antenna is classified as microstrip antenna and it is designed using a single layer known as microstrip patch. The project is proposed to design a parasitic meander line antenna which emphasize the reduction in size and increasing the directivity of the antenna. Besides, the antenna is designed to attain the return loss as minimum as well. Initially, a basic meander line antenna is designed by using Parametric Study Method in order to obtain an optimum dimensions of basic design. Then, the project continues towards designing the parasitic meander line antenna by using the similar method. The parasitic element assist the antenna to change its directivity by itself. There are 3 different structures of parasitic meander line antenna are completed at the end of the project. The 3 structures are known as Skewed Up Parasitic Meander Line Antenna (Design I), Skewed Down Parasitic Meander Line Antenna (Design III) and the last is Diamond Shaped Parasitic Meander Line Antenna (Design II). The antenna is designed and simulated using Computer Simulation Technology (CST). It is fabricated on double-sided FR-4 printed circuit board using chemical etching technique. Then the fabricated antennas are measured using indoor measurement techniques with elevated ranges. The antennas are measured using network analyzer, spectrum analyzer and trainer. Similar parameters have been chosen for both simulation and measurement process. The parameters are the resonant frequency, return loss, radiation pattern, directivity, gain, bandwidth and polarization. The comparison between the simulation and measurement results of the designed antennas were presented in the form of report.

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