Waveguides

Microwave engineer or plumber? It can be difficult to distinguish. My first industrial experience in the microwave world was using a machine to H bend L band waveguide into S shapes.

Double Ridge Waveguide with BW ratio 3.6:1

Frequency (GHz) Width (mm) Height (mm) Gap (mm) Ridge (mm) EIA WR.. Cutoff TE10(GHz)
0.108 - 0.390 879.80 378.31 73.76 219.96 WD3460-866 0.092
0.270 - 0.970 353.47 152.00 29.64 88.37 WD1390-348 0.229
0.390 - 1.400 244.55 105.16 20.498 61.14 WD963-241 0.331
0.970 - 3.500 98.48 42.34 8.255 24.613 WD388-97 0.822
1.400 - 5.000 68.25 29.34 5.72 17.07 WD269-67 1.186
3.500 - 12.40 27.28 11.73 2.29 6.83 WD107-27 2.966
5.000 - 18.00 19.10 8.20 1.60 4.78 WD75-19 4.237
12.40 - 40.00 7.70 3.30 0.64 1.93 WD30-8 10.51