A triple-band dual-polarized compact square slot antenna with an offset CPW feeding and radiator

Design of an offset coplanar waveguide (CPW)-fed triple-band dual-polarized compact square slot antenna (SSA) using offset rectangular patch with C-shaped stub is presented in this paper. Two resonance frequency bands at 1.56/2.55 GHz and dual-frequency wideband are achieved with the help of integrated C-shaped stub with rectangular radiator SSA. By selecting an appropriate offset and embedded C-shaped stub at suitable location on rectangular patch, it is likely to generate two orthogonal current components that are out of phase by 90⁰ thus forming circular polarization (CP). The antenna exhibit a 41.4% (2.56 GHz, 4.90–7.46 GHz) 3-dB axial ratio bandwidth (ARBW) and −10 dB impedance bandwidths (IBWs) of 5.16% (80 MHz, 1.51–1.59 GHz), 24.5% (660 MHz, 2.36–3.02 GHz), and 63.14% (4.06 GHz, 4.4–8.46 GHz).