Abstract
A New Design single feed dual band micro-strip patch antenna that implemented in GPS applications is presented. The suggested antenna based on two bands of GPS systems. they are L1=1.575 GHz and L2=1.227 GHz. The suggested antenna principally comprises two resonance frequencies with contents square patch, two semi-circle, two rectangular slots, S - shaped slot, two truncated slot and four circle slots in the ground plane, which fed by a 50 𝛺 coaxial probe, with over all area of 94*94 mm2. The software CST Microwave studio is used to build a simulation for the suggested antenna. The results of the simulation showed an impedance for bandwidth of 20 MHz between (1.56 GHz - 1.58 GHz) by using L1 band, while L2 band, it was 20 MHz between (1.21 - 1.23GHz). The results also showed that the circular polarization radiation can be obtained through a probe feeding at one of the diagonal lines of the patch. This antenna can reduce the loss in S11, impedance behavior, Gain and farfield radiation pattern.
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