Strip line high-pass filter with suspended ground structure

The embodiment of the invention provides a strip line high-pass filter with suspension ground structures, and relates to the technical field of filter design, the filter comprises an installation dielectric substrate, at least three strip line bodies and at least three suspension ground structures corresponding to the strip line bodies in number; the strip line bodies and the suspension ground structures are arranged on the front face and the back face of the installation medium substrate in a one-to-one correspondence and back-to-back mode. Wherein the projection of the suspension ground structure to the mounting dielectric substrate is overlapped with the strip line body. According to the technical scheme, the equivalent grounding capacitance value can be adjusted by adjusting the projection overlapping area of the suspended ground structure and the strip line body, the cut-off frequency of the high-pass filter can be remarkably reduced under the condition that the sizes of other parts of the filter are not