Title :
Design Method for Wideband Circularly Polarized Slot Antennas
Author :
Narbudowicz, Adam ; John, Matthias ; Sipal, Vit ; Bao, Xiulong ; Ammann, Max J.
Author_Institution :
Antenna & High Freq. Res. Centre, RWTH Aachen Univ., Aachen, Germany
Abstract :
A compact ultrawideband (UWB) circularly polarized (CP) slot antenna is proposed with a methodology for automated reoptimization for packaging with proprietary devices. The slot structure employs a dual-feed with an integrated compact UWB phase shifter. The design process involves an advanced optimization algorithm and demonstrates the use of spline curves for generation of CP signals. These allow easy optimization, while preserving phase coherency across a wideband. The prototyped antenna has a CP bandwidth of 54% (from 3.2 to 6.1 GHz).
Keywords :
antenna feeds; microwave antennas; phase shifters; slot antennas; ultra wideband antennas; automated reoptimization; compact slot antenna; dual feed slot structure; frequency 3.2 GHz to 6.1 GHz; integrated compact UWB phase shifter; spline curves; ultrawideband slot antenna; wideband circularly polarized slot antennas; Antenna measurements; Bandwidth; Optimization; Probes; Slot antennas; Ultra wideband antennas; Circular polarization; Ultra wideband antennas; circular polarization; optimization; slot antennas; spline; ultrawideband (UWB) antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2015.2456954
