THE MAGNETIC PARAMATER CONNECTED WITH DESIGN OF HIGH QUALITY FERRITE MICROSTRIP PHASE SHIFTER

This paper shows that the state of magnetization of the substrate is one of the main fac-tors affecting the properties of nonreciprocal latching ferrite microstrip phase shifter. Rai-sing the residual magnetization of the substrate, increasing the ratio R =4M/(4Ms) (4M-the magnetization of the latching state of the device, 4Ms-the saturation magnetization) are effective in reducing the insertion loss of the device, raising the effective-ness of phase shift, extending the frequency range of the device,and reducing the drive power, etc. Different ways of magnetization are analysed and compared. Photos indicating the structure and external form of the device are given and the main performances of singledigit and multidigit devices are also presented.