global-journal-of-research-in-engineering-f-electrical-electronic Global Journal of Research in Engineering - F: Electrical & Electronic 0975-5861 2249-4596 Global Journals Publishing Group Incorporated 115717 A Circularly Polarized Planar Monopole Antenna with Wide AR Bandwidth using a Novel Radiator/Ground Structure EllisMubarak Sani GHANA, Kwame Nkrumah University of Science and Technology 15 01 2017 17 F3

A wide band circularly polarized CP) printed monopole antenna is proposed. The 3 -dB axial ratio (AR) is realized by protruding a horizontal stub from a vertical monopole and creating a slot on the ground plane beneath the protruded stub. The monopole and slot resemble rotated T- shape structures when viewed from the top. The proposed antenna has a size of 25 × 25 mm2. Numerical results show that the antenna can realize an S11 ≤ -10 dB impedance bandwidth of 85.6 % from 4 -10 GHz, and a broadband 3 -dB AR bandwidth of 73.9 %, from 4.54 – 9.8 GHz. The pro posed antenna is simple to design, compact and suitable for circular polarization applications in C band.

 monopole circularly polarized (cp) axial ratio. Full Text

A wide band circularly polarized CP) printed monopole antenna is proposed. The 3 -dB axial ratio (AR) is realized by protruding a horizontal stub from a vertical monopole and creating a slot on the ground plane beneath the protruded stub. The monopole and slot resemble rotated T- shape structures when viewed from the top. The proposed antenna has a size of 25 × 25 mm2. Numerical results show that the antenna can realize an S11 ≤ -10 dB impedance bandwidth of 85.6 % from 4 -10 GHz, and a broadband 3 -dB AR bandwidth of 73.9 %, from 4.54 – 9.8 GHz. The pro posed antenna is simple to design, compact and suitable for circular polarization applications in C band.