Waveguide. Beam 30 deg. 
P N I T s J L
100 100 1 0
3
0 0 0 0 0 0 0
0 1500 0 0 0 1 0
100 5000 2000 0.1 0.2 3.0  1. 7.07
40 11 7.5 30 4 0
90 90 1 1
1200 -1200
512 1 512
-1 1 20 .5
0 60 12 10