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It was mainly analysed a S-band printed quadrifilar helical antenna for communication devices in this paper. And a dielectric loaded wide beam printed quadrifilar helical antenna was designed. A two-stage isolation resistor was placed in wilkinson power divider. The simulation results of this antenna agree well with the measured results.According to the simulation results and measured results,the antenna had a good heart-shaped radiation pattern from 3.05GHz to 3.45GHz, 3dB power-width was more than 160°,the gain was greater than -2dB in the azimuth range, the axial ratio was lower than 5dB, and the VSWR was lower than 1.4. this printed quadrifilar helical antenna had good electromechanical characteristics,and low cost.

A S-band Printed Quadrifilar Helical Antenna for Communication Devices