Studies on the Radiation Pattern of a Sinusoidally Edge-Modulated Microstrip Patch Antenna

Abstract

A sinusoidally edge-modulated microstrip patch antenna has been proposed and studied which provides some additional design parameters like its modulation factor r and periodicity p controlling the radiation characteristics. Both theoretical and experimental studies have been made on radiation pattern with different values of r and p for different modes of operation. The modal expansion cavity model has been employed for the analysis which shows that the physical parameters of the modulated structure have significant effects on its radiation characteristics. The property of widening of the beamwidth with the modulation factor suggests that the proposed antenna structure may find application in mobile communication systems. The theoretical data tally with the experimental results.

Indexing terms:

• Microstrip antenna
• Modulated structure