Design and Analysis of Multi Frequency Broadband Microstrip Antennas

Abstract

The two gap-coupled circular microstrip patch antennas are investigated. The numerical model for calculating the resonant frequency has been presented. The concept of coupled microstrip lines is applied to the coupled circular microstrip antennas and the numerical model for calculating the input impedance has been presented. The analysis of two gap-coupled circular microstrip patch antenna loaded with shorting post is carried out. This technique is suitable for designing of triple band, and compact antennas. The numerical model for calculating the resonant frequency of gap-coupled circular microstrip patch antennas loaded with shorting post is presented. The concept of coupled microstrip lines is applied to the coupled circular microstrip antennas loaded with shorting post and the numerical model for calculating the input impedance has been presented. The reaction theorem and cavity model is used and the theoretical model for calculating the mutual impedance of the two gap-coupled circular microstrip patch antennas loaded and without loaded has been presented. A novel cross patch antenna is designed for wideband applications. newline