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2021-07-03

Axial Ratio Tuned Circularly Polarized Slot-Loaded Antenna for S-Band and C-Band Applications

By Ramya Radhakrishnan and Shilpi Gupta
Progress In Electromagnetics Research C, Vol. 113, 239-249, 2021
doi:10.2528/PIERC21050901

Abstract

This paper introduces a dual-band circularly polarized antenna modeled on an FR4 substrate with an optimized dimension of 48 mm × 29.5 mm × 1.6 mm. A maximum usable circularly polarized bandwidth of 90% is obtained in the lower band (3.08 GHz to 3.75 GHz). A square slot etched in the ground plane loaded with asymmetric plus-shaped slits and tabs aids the impedance bandwidth enhancement. The dual-band operation is accomplished by facilitating parasitic square patches in the slot. The simulated impedance bandwidth of the proposed antenna is 740 MHz (3.07 GHz to 3.81 GHz) for the lower band and 1.57 GHz (4.64 GHz to 6.21 GHz) in the upper band. The impedance and axial ratio bandwidth percentages for lower and upper-frequency bands are 21.5%, 19.6%, and 29.4%, 10.54%, centered at 3.5 GHz and 5.5 GHz, respectively. The simulated and measured results are in reasonably good agreement.

Citation


Ramya Radhakrishnan and Shilpi Gupta, "Axial Ratio Tuned Circularly Polarized Slot-Loaded Antenna for S-Band and C-Band Applications," Progress In Electromagnetics Research C, Vol. 113, 239-249, 2021.
doi:10.2528/PIERC21050901
http://www.jpier.org/PIERC/pier.php?paper=21050901

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