Abstract
A novel single-feed wide band planar circularly polarized (CP) slot antenna is presented. This slot antenna consists of an L-shaped feeding stub with metamaterial inspired complementary split ring resonator (MICSRR) and a wide 45° rotated square aperture. Broadband impedance and CP radiation bandwidth (BW) is achieved by using a novel artificial exciting stub with defecting CSRRs on it. By controlling the excitation phase of L-shaped stub, a desirable circular polarization can be generated and both impedance and CP BWs are considerably increased by up to 89%. The operating frequency ranges in S/C band from 2.4–6.22 GHz. The measured bandwidths of 3-dB axial ratio (AR) and VSWR<2 are around 91% (2.4–6.4 GHz) and 89% (2.4–6.22 GHz), respectively.
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