A Wideband Circularly Polarized Stacked Patch Antenna Using a DGS-Enhanced Two-Stage Coupler for Sub-6 GHz Applications
This paper presents a wideband circularly polarized (CP) stacked patch antenna for 5G Sub-6 GHz applications. A major challenge in wideband dual-feed antennas is the fabrication limit caused by standard chemical etching and mechanical milling processes for extremely narrow high-impedance microstrip lines in two-stage b...