8 research outputs found
2016 Research & Innovation Day Program
A one day showcase of applied research, social innovation, scholarship projects and activities.https://first.fanshawec.ca/cri_cripublications/1003/thumbnail.jp
Optimising the axial ratio bandwidth of resonant linear to circular polarisation converters
Single screen cross slot polarization convertors with enhanced bandwidth and frequency selective filtering performance
Bandwidth comparison of rectangular and offset cross-slot frequency-selective surface polarisation transformers
Abstract This letter compares the 3Â dB axial ratio (AR) bandwidth (BW) of transmission mode singleâscreen linearâtoâcircular polarisation convertors based on three different slot topologies. Using a conventional centreâconnected crossâslot arrangement as a baseline, we show that a significant performance improvement can be achieved by creating a more elaborate design with unit cells composed of multiple unequal length offset rectangularâshaped apertures. The additional flexibility to tailor the shape of the Transverse Electric (TE) and Transverse Magnetic (TM) spectral amplitude and phase responses is exploited to achieve an 84% increase in the BW relative to the baseline for a freestanding structure, which is designed to work at a centre frequency of 10.0Â GHz. Experimental AR results are used to verify the new design methodology