CONTROLLED MULTICHANNEL FILTER FOR MICROWAVE SIGNAL BASED ON MAGNONIC CRYSTAL Russian patent published in 2019 - IPC H01P1/215 

FIELD: radio equipment.

SUBSTANCE: invention relates to radio engineering, in particular to filters. Multichannel microwave signal filter comprises a ferromagnetic film structure placed on the substrate, which is conjugated with input and output transducers of surface magnetostatic waves (SMSW), sources of control external magnetic field. Structure is formed by a film of iron-yttrium garnet (IYG) and has the shape of a rectangle, on short sides of which along a long axis in the body of the film IYG there are symmetrically two local separation paths with formation of four sites for placement of transducers of surface magnetostatic waves. Between the ends of the separation paths along the line of the long axis of the rectangle, a magnon crystal is formed, which is a set of holes in the film, placed with the same period selected from the condition of forming a Bragg bandgap in the range of wave numbers from 100 cm^-1 up to 300 cm^-1.

EFFECT: possibility of controlling operation mode of a multichannel filter based on a magnon crystal by changing the direction of the external field.

4 cl, 5 dwg