Properties of ferrites employed in microwave devices

The control of microwave signals. by electrical devices that employ ferrimagnets as the source of the device action, remains a highly specialized discipline. Together, the electrical engineer and material scientist process these metal oxide insulators as ceramic bodies or single crystals and translate their intrinsic magnetic and dielectric properties into useful device phenomena. Because the interaction between the microwave signal and the ferrimagnetic medium takes place over the entire ferrite volume, the geometry of the ferrite plays as important a role as does its intrinsic magnetic and dielectric properties. These concepts will be discussed in terms of the range of technical characteristics of the major types of ceramic ferrimagnets that are available today for microwave device applications.