The invention relates to a substrate integrated
waveguide adjustable filter. The substrate integrated
waveguide adjustable filter comprises a
resonant cavity and a plurality of first adjustable devices, wherein the
resonant cavity comprises a first
metal layer, a
dielectric layer and a second
metal layer, the
dielectric layer is clamped between the first
metal layer and the second metal layer, a metal through hole is formed in the interior of the
resonant cavity, the metal through hole passes through the edge of the first metal layer, the edge of the
dielectric layer and the edge of the secondmetal layer, and a rectangular cavity is surrounded; a gap is formed in the first metal layer along the inner side edge of the rectangular cavity; the first adjustable devices are distributed at different positions inside the rectangular cavity, and are used for controlling the resonant frequency of the resonant cavity. According to the substrate integrated
waveguide adjustable filter, the gap isformed in the first metal layer, so that the upper metal layer and the lower metal layer of the resonant cavity are coupled, and the resonant frequency of the resonant cavity is greatly reduced; andwhen the substrate integrated waveguide adjustable filter with same
center frequency is designed, the transverse area of the substrate integrated waveguide adjustable filter disclosed by the inventionis smaller, and the integration level is improved.