Abstract

In communications, antennas are the very important equipments are necessary to generate a communication system. Antennas are used in several applications like satellite communications etc. The design specifications of the antenna are considered using the transmission line model and designed with stacked square patches for multiple band operation with improved impedance matching. The Diagonal feed divides the given field into two orthogonal modes with equal magnitude and equal phase shift. The feed position is then optimized to attain the small axial ratio necessary to attain circular polarization at required frequency. The antenna has been designed at two different frequency bands with center frequencies of 1575 MHz and 1176 MHz. So the dual band circular polarization has been successfully incorporated into two square patches.

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