'Middle East Technical University, Faculty of Architecture'
Abstract
In this study we tried to design a microstrip antenna, to get a suitable radiation pattern for a LEO satellite. Our aim is to get a radiation pattern that has a maximum power which is not in the broadside direction to the antenna surface; instead broadside radiation has a relatively lower power density. Maximum power radiation is desired to be at about 30 50 degrees angle beyond the normal to the antenna surface. We desire circularly polarized radiation. We used two concentric antennas; one is a circular patch at the center and the other is an annular ring which is used at the outer region. By using Ansoft Ensemble 8.0 software, we design an antenna which has a resonance frequency at 8.2 GHz. Using the result of the program we design the real antenna. The measurement results are compared with the simulation results.M.S. - Master of Scienc
