DESIGN OF DUAL BAND SLOTTED RECTANGULAR MICROSTRIP ANTENNAS AND ITS OPTIMIZATION

Abstract

The thesis covers three aspects of Microstrip antenna designs. The first is the analysis and design of single element rectangular Microstrip antenna which operates at the central frequency of 2.4 GHz and the second aspect is the design of dual band rectangular Microstrip antenna which is operates as 2.4 & 3.08 GHz. Both antennas have been modeled, designed and simulated. Basically, transmission line and cavity modeling is going to use to model both antennas. First, the design parameters for single element of rectangular patch antenna have been calculated from the transmission line model equation and extend the antenna design to Dual Band rectangular Microstrip patch antenna using the slots at radiating edge. The simulation process has been done through IE3D electromagnetic software which is based on method of movement (MOM).For rectangular Microstrip antenna design used RT- Duriod which is Teflon based, Microstrip board with dielectric constant 2.4 and the substrate height is 1.58 mm, scaling factor 0.95 and loss tangent is 0.001. The third is the optimization is done using IE3D simulation software, Using Random Optimization, Powel Optimization, Genetic algorithm optimization and Fast EM Optimization schemes for both single and dual band microstrip antenna. The properties of antenna such as Return loss and Antenna Bandwidth, Radiation Pattern, Input Impedance, Gain VS. Frequency Plot, S-Parameter has been investigated and compared the results of different optimization schemes and theoretical schemes.