A Wideband Circularly Polarized Slot Antenna Backed by a Frequency Selective Surface
Puneeth Kumar Tharehalli Rajanna, Karthik Rudramuni, Krishnamoorthy Kandasamy
Journal of the Korean Institute of Electromagnetic Engineering and Science · 2019
doi:10.26866/jees.2019.19.3.166 (opens in a new tab)
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Abstract
This paper presents the design of a coplanar waveguide (CPW)-fed single-layer wideband circularly polarized (CP) planar slot antenna backed by a frequency selective surface (FSS). The planar slot antenna is fed with a stub-loaded modified CPW feed line to tune and optimize the impedance bandwidth. The corners of the square slot antenna are perturbed to produce two orthogonal degenerate modes required for a wideband CP operation. The FSS layer is placed under the slot antenna to increase the gain and axial ratio bandwidth. The measured results of the proposed antenna provide an impedance bandwidth of 63.22% and an axial ratio bandwidth of 31.14% with a peak gain of 4.87 dB. The proposed antenna has a simple geometry, a wide CP bandwidth, and a good gain.
Abstract licence: CC BY-NC
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