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A coplanar waveguide fed tilted fractal inspired slot antenna for wideband circular polarization
Author(s) -
Saraswat Kapil,
Harish Ayyangar R.
Publication year - 2019
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31759
Subject(s) - wideband , optics , coplanar waveguide , fractal , slot antenna , ground plane , fractal antenna , physics , circular polarization , monopole antenna , microstrip antenna , antenna (radio) , coaxial antenna , telecommunications , microstrip , engineering , mathematics , microwave , mathematical analysis , quantum mechanics
Abstract In this article, a coplanar waveguide (CPW) fed 45° tilted fractal inspired slot antenna to achieve wideband circular polarization is presented. A fractal‐square slot is etched from the ground plane and rotated by 45°. The fractal slot is excited by the CPW fed monopole antenna. To achieve wideband circular polarization, asymmetric arm length of the fractal slot is used. The proposed antenna is fabricated and tested. The measured impedance bandwidth (|S11| < −10 dB) is 22.5% (3.6‐4.57 GHz) for Band‐1 and 63.5% (5.1‐10.1 GHz) for Band‐2, and measured 3 dB axial ratio bandwidth is 34.7% (6.37‐9.05 GHz). Experimental results show that the proposed antenna generates right‐hand circular polarization in the + Z direction. Left‐hand circular polarization can be achieved by tilting the fractal slot by −45°.