BAND-PASS SELECTIVE-FREQUENCY SURFACE Russian patent published in 2019 - IPC H01Q15/14 G02B5/28 

FIELD: antenna equipment.

SUBSTANCE: band-pass selective-frequency surface relates to microwave and optical equipment and can be used in communication system antennas, frequency converters and spectrometers ranging from centimeter to micron wavelengths. Frequency selective surface comprises layers of dielectric alternating non-resonant subwave metal gratings of inductive and capacitive type, made respectively in the form of square windows in metal layer and in form of flat square conductors, it differs from known designs in that all dielectric layers have the same thickness of less than a quarter of the wavelength in the dielectric at the central frequency of the pass band, and their number is equal to twice the order of the band-pass filter, which is a frequency-selective surface.

EFFECT: possibility of its manufacturing using dielectric plates of standard thickness.

1 cl, 3 dwg, 1 tbl