Abstract :
A novel type of DMVPPS (dual-mode variable polarization phase shifter) is introduced in general terms. The DMVPPS consists of a nonreciprocal circular polarizer, a Faraday rotator, and a variable polarizer. The basic structure is a geometry in which the surface of a ferrite cylinder is metallized to form a circular waveguide. The amount of phase shifting available from the axially magnetized and transverse magnetized sections, respectively, depends on the saturation moment, remanence ratio, operating frequency, and cross-sectional dimensions of the circular waveguide. Any linearly polarized wave entering the device is converted to vertical polarization. For circularly polarized inputs, the output produced can be variably polarized depending on the control of the magnetic field applied to the rotator. The device features a simple structure, low insertion loss, small size and weight, and characteristics comparable to conventional phase shifters.<>
Keywords :
electromagnetic wave polarisation; ferrite devices; phase shifters; solid-state microwave devices; waveguide components; Faraday rotator; axially magnetized; circular waveguide; circularly polarized inputs; cross-sectional dimensions; dual mode variable polarization phase shifter; ferrite cylinder; low insertion loss; nonreciprocal circular polarizer; operating frequency; remanence ratio; rotator; saturation moment; simple structure; small size; small weight; transverse magnetized sections; variable polarizer; vertical polarization; Ferrites; Frequency; Geometry; Magnetic variables control; Metallization; Phase shifters; Polarization; Remanence; Saturation magnetization; Surface waves;
