窄带FSS滤波器

The invention discloses a narrowband FSS filter, which comprises a waveguide, a resonant metal diaphragm and a coupling metal diaphragm. The resonant metal diaphragm and the coupling metal diaphragm are both perpendicular to the longitudinal direction of the waveguide and connected to the four sides of the waveguide at the same time. The feature is that the resonant metal diaphragm and the coupling metal diaphragm are alternately arranged along the longitudinal direction of the filter. The two metal diaphragms are provided with coupling holes connected to the inner wall of the waveguide only in one direction of the cross section of the waveguide. The invention can meet the design requirements of low passband insertion loss, high rejection outside the passband, and compact appearance within a relatively narrow bandwidth range. It has the characteristics of flexible design, simple structure and convenient processing, and is mainly used in various microwave bands. Among the electronic systems, especially in military and civilian fields such as radar, antenna feeder systems, missile guidance, and communications.