An edge slotted waveguide antenna array based on T-shaped cross-section radiating waveguide is proposed. The T-shaped\nwaveguide is analyzed and designed to operate in dominant mode around the center frequency, which has a lower profile compared\nwith the rectangular one.The radiating slots are etched and rotated alternatively on the broadened top plate without cutting into the\nadjacent walls. The metal fences are inserted between slots to reduce the mutual coupling and surface wave.Therefore, the sidelobe\nlevel in
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