Title :
Full-wave design and optimization of circular waveguide polarizers with elliptical irises
Author :
Bertin, Giorgio ; Piovano, Bruno ; Accatino, Luciano ; Mongiardo, Mauro
Author_Institution :
Telecom Italia Lab., Turin, Italy
fDate :
4/1/2002 12:00:00 AM
Abstract :
We describe the design and optimization of a new polarizer structure realized in circular waveguide with insertion of elliptical irises. The device is compact, showing a considerable reduction in size and weight when compared to previously known realizations. It requires manufacturing by milling techniques only and, since it is composed entirely by waveguides with separable cross sections, it is also well suited for electromagnetic modeling. Measured and theoretical results for a polarizer with a 90°±1° differential phase shift and a return loss better than 35 dB for both polarizations over the operating frequency band confirm the validity of the proposed design
Keywords :
circular waveguides; electromagnetic wave polarisation; mode matching; optimisation; waveguide components; waveguide discontinuities; circular waveguide polarizers; differential phase shift; electromagnetic modeling; elliptical irises; full-wave design; hierarchical optimization; milling techniques; mode-matching methods; polarization discriminator; return loss; separable cross sections; size reduction; waveguide discontinuities; weight reduction; Design optimization; Electromagnetic modeling; Electromagnetic wave polarization; Electromagnetic waveguides; Frequency measurement; Loss measurement; Milling; Phase measurement; Virtual manufacturing; Waveguide discontinuities;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
