CPW-Fed Dual-Sense Cross-Shaped Broadband Circularly Polarized Antenna for Wireless and Satellite Application

Abstract

In this work, dual-sense cross-shaped broadband circularly polarized antenna is presented. It has an asymmetric modified cross-shaped feed line with four rectangular stubs and a small circular slot. A modified CPW ground plane can generate circular polarization (CP). The proposed antenna provides dual-sense CP, i.e., RHCP and LHCP by changing the port excitation. The simulated results demonstrate ultra-wideband (UWB) impedance bandwidth (IBW) ranging from 3.6 to 16.7 GHz (129%) and broadband 3-dB AR bandwidth ranging from 4.2 to 8.7 GHz (69.76%). Two rectangular-shaped stubs in the lower-left corner and grounded circular slot are embedded to improve the antenna isolation more than 15 dB over the usable frequency range. The proposed antenna has high gain, good LHCP, and RHCP polarization and compact size which makes it useful for the wireless, satellite, and UWB application.