MICROSTRIP FILTER ON SLOW-DOWN SYSTEM WITH DIELECTRIC INSERTS Russian patent published in 2009 - IPC H01P1/00 

FIELD: chemistry.

SUBSTANCE: microstrip filter contains base with relative dielectric permeability e and thickness d, from one side of which isotropic metal screen is placed, from the other side metal conductor, forming sequence of cells with sliding symmetry plane. According to claimed invention filter metal conductor is made in form of segment of zigzag-line of planar slow-down system with width equal to quarter of slowed down wave length, and each filter cell contains rectangular dielectric insert, located on its symmetry axis with width equal to width of metal conductor, thickness equal (1.5…2)d and made from material with relative dielectric permeability (8…10)ε.

EFFECT: possibility of clear fixation of frequencies of filter pass band cutoffs with small loss and high own structure quality in SHF range, ensuring its overall dimension smaller than central operating wavelength.

3 dwg