Title :
A Low-Loss 74–110-GHz Faraday Polarization Rotator
Author :
Erickson, Neal R. ; Grosslein, Ronald M.
Author_Institution :
Massachusetts Univ., Amherst
Abstract :
We have developed a switchable Faraday polarization rotator for 74-110 GHz with a typical room-temperature insertion loss of 0.6 dB and a maximum of ~1.3 dB. The device uses a cylindrical ferrite rod in the mode with an axial magnetic field applied by a solenoid. The ports are square metallic waveguides transitioning to ceramic tapers, which then couple to the ferrite rod. The device is designed for use at a temperature of 20 K, where typical loss is <0.5 dB. The design rotation is about plusmn45deg the zero-bias value, but up to 90deg is possible. The switching time is <10 s.
Keywords :
Faraday effect; ferrite devices; magneto-optical devices; microwave photonics; millimetre wave devices; waveguide transitions; ceramic tapers; cylindrical ferrite rod; frequency 74 GHz to 110 GHz; loss 0.6 dB; millimeter wave HEMT; room-temperature insertion loss; switchable Faraday polarization rotator; temperature 20 K; temperature 293 K to 298 K; zero-bias value; Bandwidth; Ferrites; Millimeter wave technology; Millimeter wave transistors; Optical waveguides; Polarization; Solenoids; Switches; Waveguide components; Waveguide transitions; Faraday rotator; ferrite devices; ferrite switch; millimeter wave;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2007.909871
