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DUAL-BAND DUAL-SENSE CIRCULARLY POLARIZED ASYMMETRIC SLOT ANTENNA WITH F-SHAPED FEED LINE AND PARASITIC ELEMENTS

By R. K. Saini and P. S. Bakariya

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Abstract:
A novel dual-band and dual-sense circularly polarized coplanar waveguide (CPW) fed planar antenna with an asymmetric rectangular slot is presented. An F-shaped feed line is protruded from the signal line into the slot. Circular polarization is obtained due to the F-shaped feed line and asymmetry in the slot. Axial ratio bandwidth is significantly enhanced by placing parasitic elements adjacent to the feedline. The antenna has a size of 63.5×55 mm2. The measured results agree well with simulation. The measured impedance bandwidths are 26.04% (1.57 GHz-2.04 GHz) for the lower band and 18.93% (2.87 GHz-3.47 GHz) for the upper band. The measured 3 dB axial ratio bandwidths of lower band and upper bands are 22.22% (1.6 GHz-2 GHz) and 10.53% (3.15 GHz-3.5 GHz), with respect to 1.8 GHz (RHCP) and 3.325 GHz (LHCP), respectively.

Citation:
R. K. Saini and P. S. Bakariya, "Dual-Band Dual-Sense Circularly Polarized Asymmetric Slot Antenna with F-Shaped Feed Line and Parasitic Elements," Progress In Electromagnetics Research M, Vol. 69, 185-195, 2018.
doi:10.2528/PIERM18040203

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