The invention relates to an anti-interference high-selectivity omnidirectional planar filtering antenna, a filtering
processing method and application, and the planar filtering antenna comprises a
metal radiation layer, a first
dielectric substrate, a first
coupling layer, a second
dielectric substrate and a second
coupling layer which are sequentially stacked. The second
dielectric substrate is provided with a plurality of metalized through holes which are distributed in an
annular array mode and define a substrate integrated cavity with the first
coupling layer and the second coupling layer, the metalized through holes divide the second coupling layer into an inner side patch and an outer side ring piece, and the inner side patch is evenly provided with a plurality of
resonance grooves; and a feed probe penetrating and extending to the second
dielectric substrate is arranged at the center of the bottom of the
metal radiation layer. According to the invention, the substrate integrated
waveguide technology is adopted, the substrate integrated cavity is formed, and a high-selectivity filtering effect is realized by utilizing the characteristic of high Q value, so that the interference of out-of-band signals is effectively inhibited, and the advantages of the
patch antenna and the substrate integrated cavity are effectively combined.