Microwave ferrite is a gyromagnetic dielectric material that works in the microwave frequency range of 100MHz to 300GHz. According to the crystal structure, microwave ferrite mainly includes garnet type, spinel type and magnetoplumbite type (hexagonal crystal system) three. category. Ferrite is the only practical magnetic material in the microwave band.
The gyromagnetism of the material is the basic principle of the microwave ferrite device. It refers to the gyromagnetic effect (also known as the tensor permeability characteristic) of the ferrite microwave material under the combined action of an external high-frequency wave field and a constant DC magnetic field. It is this gyromagnetic effect that makes the electromagnetic wave propagating in the ferrite undergo a polarized rotation (Faraday effect) to generate strong absorption of electromagnetic wave energy (ferromagnetic resonance). People use this gyromagnetic phenomenon to make isolation. Circulator, Circulator.
It has the characteristics of small size, wide frequency band, small insertion loss, etc. It is widely used in information communication (receiving and forwarding base stations of China Mobile, China Unicom, CITIC), military (electronic countermeasures), aerospace, space technology and other fields.