The magnetic parameter connected with design of high quality ferrite microstrip phase shifter

It is shown that the state of magnetization of the substrate is one of the main factors affecting the properties of nonreciprocal latching ferrite microstrip phase shifter. Raising the residual magnetization of the substrate, increasing the ratioR(=4πM/4πM _s ) (4πM—the magnetization of the “latching state” of the device, 4πM _s —the saturation magnetization) are effective in reducing the insertion loss of the device, raising the effectiveness of phase shift, extending the band width, and reducing the drive power, etc. Different methods of magnetization are analysed and compared. Photographs indicating the structure and the external form of the device are given and the main performances of single-digit and multi-digit devices are also presented.