Rectangular Waveguide Sizes




RECTANGULAR

WAVEGUIDE

SIZES


The following table lists standard rectangular waveguide sizes and their frequency ranges:-

WG EIA-WR IEC-R   Fc1, GHz   Flo, GHz   Fhi, GHz   Fc2, GHz A, in B, in A, mm B, mm
00 2300 3 .257 0.32 0.49 .513   23.000   11.500   584.200   292.100
0 2100 4 .281 0.35 0.53 .562 21.000 10.500 533.400 266.700
1 1800 5 .328 0.41 0.625 .656 18.000 9.000 457.200 228.600
2 1500 6 .393 0.49 0.75 .787 15.000 7.500 381.000 190.500
3 1150 8 .513 0.64 0.96 1.026 11.500 5.750 292.100 146.050
4 975 9 .605 0.75 1.12 1.211 9.750 4.875 247.650 123.825
5 770 12 .766 0.96 1.45 1.533 7.700 3.850 195.580 97.790
6 650 14 .908 1.12 1.70 1.816 6.500 3.250 165.100 82.550
7 510 18 1.157 1.45 2.20 2.314 5.100 2.550 129.540 64.770
8 430 22 1.372 1.70 2.60 2.745 4.300 2.150 109.220 54.610
9A 340 26 1.736 2.20 3.30 3.471 3.400 1.700 86.360 43.180
10 284 32 2.078 2.60 3.95 4.156 2.840 1.340 72.136 34.036
11A 229 40 2.577 3.30 4.90 5.154 2.290 1.145 58.166 29.083
12 187 48 3.152 3.95 5.85 6.305 1.872 .872 47.549 22.149
13 159 58 3.712 4.90 7.05 7.423 1.590 .795 40.386 20.193
14 137 70 4.301 5.85 8.20 8.603 1.372 .622 34.849 15.799
15 112 84 5.260 7.05 10.0 10.519 1.122 .497 28.499 12.624
16 90 100 6.557 8.20 12.4 13.114 .900 .400 22.860 10.160
17 75 120 7.869 10.0 15.0 15.737 .750 .375 19.050 9.525
18 62 140 9.488 12.4 18.0 18.976 .622 .311 15.799 7.899
19 51 180 11.571 15.0 22.0 23.143 .510 .255 12.954 6.477
20 42 220 14.051 18.0 26.5 28.102 .420 .170 10.668 4.318
21 34 260 17.357 22.0 33.0 34.714 .340 .170 8.636 4.318
22 28 320 21.077 26.5 40.0 42.153 .280 .140 7.112 3.556
23 22 400 26.346 33.0 50.0 52.691 .224 .112 5.690 2.845
24 19 500 31.391 40.0 60.0 62.781 .188 .094 4.775 2.388
25 15 620 39.875 50.0 75.0 79.749 .148 .074 3.759 1.880
26 12 740 48.372 60.0 90.0 96.745 .122 .061 3.099 1.549
27 10 900 59.014 75.0 110 118.029 .100 .050 2.540 1.270
28 8 1200 73.768 90.0 140 147.536 .080 .040 2.032 1.016
29 7 1400 90.791 110 170 181.582 .065 .033 1.651 .826
30 5 1800 115.714 140 220 231.428 .051 .026 1.295 .648
31 4 2200 137.242 170 260 274.485 .043 .022 1.092 .546
32 3 2600 173.571 220 325 347.143 .034 .017 .864 .432
– 2 – 295.071 325 500 590.143 .020 .010 .508 .254

Abbreviations:

WG – British Waveguide Number

EIA – Electronic Industries Association (USA)

IEC – International Electrotechnical Commission

Fc1 – TE10 Cut-off Frequency

Flo – Lowest Recommended Usage ~1.25xFc1

Fhi – Highest Recommended Usage ~1.9xFc1

Fc2 – TE20 Overmode Frequency

A – Internal Width

B – Internal Height

Notes:

WRno = Internal width in inches x100

Fc1 and Fc2 are theoretically calculated from Width – may differ from other sources at high frequencies

Assumptions: c=2.99792458e+8 m/s, Er=1

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8-Apr-2021