JCS_V6_N2_RP3 Saurabh Singh Patel Sudhanshu Verma Journal on Communication Engineering and Systems 2277-5242 6 2 11 14 Circular Polarization (CP), Coplanar Waveguide (CPW), Patch Antenna, Triple-band, Axial Ratio (AR) In this paper, a small-size inverted U-shaped structure is presented for designing a triple-band Circularly Polarized (CP) antenna which has a single metallic layer. A micro-strip Coplanar Waveguide (CPW) feed is given. The proposed antenna has a rectangular ground plane and a radiating patch that has an inverted U-shaped, and inverted L-shaped structure that creates three bands in X-band operating at 8.0 / 9.2 / 9.7 GHz frequency bands and has less than -10 dB returnloss bandwidths. The antenna also provides CP modes at 7.1 / 8.5 / 9.9 GHz. The 3 dB axial-ratio bandwidths are 486 MHz centered at 7.1 GHz, 178 MHz centered at 8.5 GHz, and 190 MHz centered at 9.9 GHz. The proposed antenna operates at frequencies 8.0 / 9.2 / 9.7 GHz with VSWR<2. February - April 2017 Copyright © 2017 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=13461