SIW U shape dual-polarized slot antenna

A slotted SIW dual-polarization array antenna is realized in a single-layer structure. Two feed waveguides adjacent each other attached at both ends of cross-slotted radiating SIW excite the leaky waves propagating in opposite directions. Each of them radiates either of two circularly polarized waves in symmetrical beam directions. Balanced design of two beams for each polarization imposes symmetry in the array design of slots.