Analysis of Microstrip Slot Antenna of Dual ‘L’ Shape for Return Loss Enhancement with Slotted Finite and Infinite Ground Plane

In this thesis is a Comparative Analysis of dual ‘L’ shaped Microstrip Slot Antenna(MSA) with slotted finite and infinite ground plane for return loss-enhancement is presented. The main aim of this work is to enhance the return loss parameters and radiation efficiency of the antenna. The structure involves a comparison of dual ‘L’ shaped MSA with slotted finite and infinite ground plane. The antenna is designed with dual ‘L’ slot on the dielectric plane (at a height of 1.5 mm) on FR4 substrate and simulated using IE3D simulator. Simulation results show improvement in the radiation characteristics. It can be clearly seen that impedance -matching is dependent upon the location of the probe feed. Varying the location of the feed point also results in changes of inductance and capacitance value of antenna-structure. MA is with dual ‘L’ slot, improves properties such as resonant frequency, gain, return loss that may affect the performance of the antenna. The structure uses a single layer configuration; dual ‘L’ shape slots on the dielectric patch and diffracted ground plane. The design is simulated with the IE3D electromagnetic simulation tool and the geometries are simulated at the resonant frequency of 6.966 GHz for Antenna1 and Antenna2. The properties of antenna such as BW, RL, and VSWRat different heights have been investigated. In the proposed designs, probe feeding is used. This work provides a very good method for the enhancement of RL and radiation efficiency. In addition, the proposed work defines a good method for impedance matching.