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.
| Frequency (GHz) | Internal (cm) | EIA WR.. | IEC R.. | Cutoff (GHz) |
|---|---|---|---|---|
| 0.32 - 0.49 | 58.420 x 29.210 | 2300 | 3 | 0.265 |
| 0.35 - 0.53 | 53.34 x 26.670 | 2100 | 4 | 0.281 |
| 0.41 - 0.625 | 45.72 x 22.86 | 1800 | 5 | 0.328 |
| 0.49 - 0.75 | 38.10 x 19.65 | 1500 | 6 | 0.393 |
| 0.64 - 0.96 | 29.21 x 14.605 | 1150 | 8 | 0.513 |
| 0.75 - 1.12 | 24.765 x 12.3825 | 975 | 9 | 0.605 |
| 0.96 - 1.45 | 19.558 x 9.779 | 770 | 12 | 0.766 |
| 1.12 - 1.70 | 16.510 x 8.225 | 650 | 14 | 0.908 |
| 1.45 - 2.20 | 12.954 x 6.477 | 510 | 18 | 1.157 |
| 1.70 - 2.60 | 10.922 x 5.461 | 430 | 22 | 1.372 |
| 2.20 - 3.30 | 8.636 x 4.318 | 340 | 26 | 1.763 |
| 2.60 - 3.95 | 7.2163 x 3.403 | 284 | 32 | 2.078 |
| 3.30 - 4.90 | 5.8166 x 2.909 | 229 | 40 | 2.577 |
| 3.95 - 5.85 | 4.7549 x 2.2149 | 187 | 48 | 3.152 |
| 4.90 - 7.05 | 4.0486 x 2.0193 | 159 | 58 | 3.711 |
| 5.85 - 8.20 | 3.4849 x 1.580 | 137 | 70 | 4.301 |
| 7.05 - 10.00 | 2.880 x 1.2624 | 112 | 84 | 5.259 |
| 8.20 - 12.40 | 2.286 x 1.016 | 90 | 100 | 6.557 |
| 10.00 - 15.00 | 1.9050 x 0.9525 | 75 | 120 | 7.868 |
| 12.40 - 18.00 | 1.58 x 0.790 | 62 | 140 | 9.426 |
| 15.00 - 22.00 | 1.295 x 0.6477 | 51 | 180 | 11.574 |
| 18.00 - 26.50 | 1.0668 x 0.4318 | 42 | 220 | 14.047 |
| 22.00 - 33.00 | 0.8636 x 0.4318 | 34 | 260 | 17.328 |
| 26.50 - 40.00 | 0.7112 x 0.3556 | 28 | 320 | 21.081 |
| 33.00 - 50.00 | 0.5659 x 0.2845 | 22 | 400 | 26.342 |
| 40.00 - 60.00 | 0.4775 x 0.2388 | 19 | 500 | 31.357 |
| 50.00 - 75.00 | 0.3759 x 0.1880 | 15 | 620 | 39.863 |
| 60.00 - 90.00 | 0.3098 x 0.1550 | 12 | 740 | 48.350 |
| 75.00 - 100.00 | 0.2540 x 0.1270 | 10 | 900 | 59.010 |
| 90.00 - 140.00 | 0.2032 x 0.1016 | 8 | 1200 | 73.800 |
| 140.00 - 220.00 | 0.1295 x 0.0635 | 6 | 2400 | 116.80 |