Fig. 2

(a) Conventional cavity reflector, (b) unfolded 2D structure, (c) modified cavity structure with truncated corners and triangular extensions at the top corners, and (d) 3D view of the proposed structure.

(a) Conventional cavity reflector, (b) unfolded 2D structure, (c) modified cavity structure with truncated corners and triangular extensions at the top corners, and (d) 3D view of the proposed structure.