Title :
Analysis and design of a two-octave polarization rotator for microwave frequency
Author :
Torres, R.P. ; Cátedra, M. F á
Author_Institution :
Dept. de Electron., Cantabria Univ., Santander, Spain
fDate :
2/1/1993 12:00:00 AM
Abstract :
The analysis and design of a 45° polarization rotator are presented. A two-octave frequency band is achieved with only three grids of strips, each rotated with respect to the previous one. Over this band the transmission loss is less than 0.5 dB, the circular polarization ratio is less than 2.0 dB, and the major axis of the polarization ellipse forms 45°±3° with respect to the linear polarization direction of the incident plane wave. The analysis method is an original scheme based upon the conjugate-gradient fast Fourier transform (CG-FFT) method to analyze periodic structures and the generalized scattering matrix method to study their connection. A comparison between numerical and measured data is presented
Keywords :
S-matrix theory; conjugate gradient methods; electromagnetic wave polarisation; fast Fourier transforms; microwave devices; 4.5 to 18 GHz; 45° polarization rotator; CG-FFT; circular polarization ratio; conjugate-gradient fast Fourier transform; generalized scattering matrix; incident plane wave; microwave frequency; periodic structures; polarization ellipse; transmission loss; two-octave frequency band; Dielectric materials; Fourier transforms; Frequency; Nonhomogeneous media; Polarization; Scattering; Sheet materials; Strips; Surface waves; Wire;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
