Dual-mode SIW balance band-pass filter for microstrip-slot structure feeding

The invention discloses a dual-mode SIW balanced band-pass filter fed by a microstrip slot feed structure. The dual-mode SIW balanced band-pass filter comprises three layers of dielectric substrates,the microstrip slot feed structure and an SIW resonant cavity, the upper surface of the first dielectric substrate and the lower surface of the third dielectric substrate are respectively provided with two feed microstrip lines along the Z axis; the second dielectric substrate is provided with four rows of metal through hole arrays and two perturbation metal through holes; an upper metal layer isarranged between the first dielectric substrate and the second dielectric substrate; a shared lower metal layer is arranged between the second dielectric substrate and the third dielectric substrate;each of the upper metal layer and the lower metal layer is provided with two rectangular metal slots along the X axis, and the feed microstrip line and the rectangular metal slots form the microstripslot feed structure; and the