Dual circular polarization sum-difference network

The invention belongs to a sum-difference network, and provides a dual-circular-polarization sum-difference network in order to solve the technical problem that in an existing sum-difference network structure, modules are connected through cables, and the debugging difficulty is increased. Comprising a first dielectric plate, a first bonding plate, a second dielectric plate, a second bonding plate, a third dielectric plate, a third bonding plate and a fourth dielectric plate which are sequentially stacked, metal grounding structures are printed on the two sides of the first dielectric plate, the side, close to the second bonding plate, of the second dielectric plate, the side, close to the second bonding plate, of the third dielectric plate and the two sides of the fourth dielectric plate, and a levorotation sum-difference network structure is printed on the surface, close to the first bonding plate, of the second dielectric plate. A right-handed rotation sum-difference network structure is printed on the surface, close to the third bonding plate, of the third dielectric plate, feed holes are formed in the left-handed rotation sum-difference network structure on the second dielectric plate, and feed through holes which are communicated with one another are formed in the positions, corresponding to the feed holes, of the second bonding plate, the third dielectric plate, the third bonding plate and the fourth dielectric plate.