Single-layer cross-coupled filter

A single-layer cross-coupling filter, comprising:

• a cavity in which a receiving space is formed;
• an integrally formed resonant structure installed in the receiving space, and including at least two rows of resonant units distributed along a signal transmission path, the at least two rows of resonant units being located in a same plane of the receiving space, each row of the resonant units including a plurality of resonators, wherein the resonators on a same row are coupled and connected to form signal transmission, and at least two adjacent resonators in different rows are coupled and connected to realize cross-coupling;
• and
• at least one partition wall arranged between two adjacent rows of the resonant units, wherein a coupling window is formed on the partition wall, and the cross-coupling between the two adjacent resonators in different rows is formed through the corresponding coupling window.