The invention relates to the technical field of
radio frequency, and discloses an E-band low-loss EBG multilayer integrated band-pass filter. The filter comprises a three-dimensional structure formedby laminating a plurality of
layers of
electromagnetic band gap structure unit patches of two-dimensional structures, wherein a gap is formed between every two adjacent
electromagnetic band gap structure unit patches, ad a
coupling hole is formed in the center of each
electromagnetic band gap structure unit patch, and the size of each
coupling hole is gradually changed in the laminating direction.According to the technical scheme provided by the invention, the three-dimensional cavity structure is realized by adopting a gradual
change type electromagnetic
band gap structure unit patch laminated structure; compared with a traditional cavity filter, the filter is easier to process, saves the cost, and solves the problem of low
processing precision; according to the technical scheme, while the band-pass filter is achieved, due to the fact that the vertical structure is adopted, the plane size of the filter is greatly reduced especially when high-order design is carried out, thereby facilitating
miniaturization design; according to the technical scheme, the propagation of electromagnetic
waves in a certain direction or propagation in all directions can be prevented within a certain
frequency band.