A waveguide is a structure that guides waves, such as electromagnetic waves or sound, with minimal loss of energy by restricting the transmission of energy to one direction. Without the physical constraint of a waveguide, wave intensities decrease according to the inverse square law as they expand into three-dimensional space.
Waveguides are primarily used as transmission lines at microwave frequencies, used in microwave ovens, radar, communication satellites, and microwave radio link equipment to connect microwave transmitters and receivers to their antennas.
The advantage of the waveguide is that the conductor loss and dielectric loss are small; the power capacity is large; there is no radiation loss; the structure is simple and easy to manufacture.
In this article, we’d like to share the common waveguide port type, WR port size, and its corresponding working band.
| WR Model | Inner Size (inch） | Freq. Range(GHz） | TE10 Cutting Freq. (GHz） | Inner Size (mm） | UIY WR Flange size (mm） |
| WR-1 | 0.010 x 0.005 | 750-1100 | 590.551 | 0.0254*0.127 | / |
| WR-1.5 | 0.0150 x 0.0075 | 500-750 | 393.701 | 0.381*0.1905 | / |
| WR-2 | 0.020 x 0.010 | 325-500 | 295.276 | 0.508*0.254 | / |
| WR-3 | 0.034 x 0.017 | 220-325 | 173.691 | 0.8636*0.4318 | / |
| WR-4 | 0.0430 x 0.0215 | 170-260 | 137.337 | 1.0922*0.5461 | / |
| WR-5 | 0.0510 x 0.0255 | 140-220 | 115.794 | 1.2954*0.6477 | / |
| WR-6 | 0.0650 x 0.0325 | 110-170 | 90.854 | 1.651*0.8255 | / |
| WR-8 | 0.08 x 0.04 | 90-140 | 73.8189 | 2.032*1.016 | / |
| WR-10 | 0.10 x 0.05 | 75-110 | 59.0551 | 2.54*1.27 | dia19.1 |
| WR-12 | 0.122 x 0.061 | 60-90 | 48.4058 | 3.099*1.549 | dia19.1 |
| WR-15 | 0.148 x 0.074 | 50-75 | 39.9021 | 3.76*1.88 | dia19.1 |
| WR-19 | 0.188 x 0.094 | 40-60 | 31.4123 | 4.775*2.388 | dia28.6 |
| WR-22 | 0.224 x 0.112 | 33-50 | 26.3639 | 5.69*2.85 | dia28.6 |
| WR-28 | 0.280 x 0.140 | 26.5-40 | 21.0911 | 7.112*3.556 | 19.0*19.0 |
| WR-34 | 0.340 x 0.170 | 20-33 | 17.3692 | 8.64*4.32 | 21.1*21.1 |
| WR-42 | 0.420 x 0.170 | 18-26.5 | 14.0607 | 10.67*4.32 | 22.4*22.4 |
| WR-51 | 0.510 x 0.255 | 15-22 | 11.5794 | 12.95*6.48 | 30.2*30.2 |
| WR-62 | 0.622 x 0.311 | 12.4-18 | 9.49439 | 15.8*7.9 | 33.4*33.4 |
| WR-75 | 0.750 x 0.375 | 10 ~ 15 | 7.87401 | 19.05*9.53 | 38.1*38.1 |
| WR-90 | 0.900 x 0.400 | 8.2-12.4 | 6.56167 | 22.86*10.16 | 41.3*41.3 |
| WR-112 | 1.122 x 0.497 | 7.05-10 | 5.26338 | 28.5*12.62 | 47.8*47.8 |
| WR-137 | 1.372 x 0.622 | 5.85-8.2 | 4.30431 | 34.85*15.8 | 68.3*49.2 |
| WR-159 | 1.590 x 0.795 | 4.9-7.05 | 3.71416 | 40.4*20.2 | 81.0*61.9 |
| WR-187 | 1.872 x 0.872 | 3.95-5.85 | 3.15465 | 47.55*22.15 | 88.9*63.5 |
| WR-229 | 2.29 x 1.15 | 3.3-4.9 | 2.57882 | 58.17*29.08 | 98.4*69.9 |
| WR-284 | 2.84 x 1.34 | 2.6-3.95 | 2.07941 | 72.1*34 | 114.3*76.2 |
| WR-340 | 3.4 x 1.7 | 2.2-3.3 | 1.73692 | 86.36×43.18 | 138.2*95 |
| WR-430 | 4.30 x 2.15 | 1.7-2.6 | 1.37337 | 109.22*54.61 | 161.1*106.4 |
| WR-650 | 6.50 x 3.25 | 1.12-1.17 | 0.90854 | 165.1*82.55 | 220.7*138.1 |
| WR-770 | 7.700 x 3.385 | 0.96-1.5 | 0.76695 | 195.58*97.79 | 285*187.4 |
| WR-975 | 9.75 x 4.875 | 0.75-1.1 | 0.59203 | 247.65*123.82 | 336.6*212.7 |
| WR-1150 | 11.50 x 5.75 | 0.64-0.96 | 0.51352 | 292.1*146.1 | 381*235 |
| WR-1500 | 15.0 x 7.5 | 0.49-0.74 | 0.3937 | 381*190.5 | 469.9*279.4 |
| WR-1800 | 18 x 9 | 0.43-0.62 | 0.32808 | 457.2*228.6 | 546.1*317.5 |
| WR-2100 | 21.0 x 10.5 | 0.35-0.53 | 0.28121 | 533.4*266.7 | 625.5*358.8 |
| WR-2300 | 23.0 x 11.5 | 0.32-0.49 | 0.25676 | 584.2*292.1 | 676.3*384.2 |