FT-RF Guide to Circular Waveguide (International standard)

21/12/2021 Posted by: ft-rf.com.tw

FT-RF Guide to Circualar Waveguide
EIA	Insdie diameter (Round)		Cutoff frequency	Recommended frequency
designation WC	in cm	in mm	for air-filled	range for TE mode in GHZ
992	25.184	251.84	0.698	0.8-1.1
847	21.514	215.14	0.817	0.94-1.29
724	18.377	183.77	0.957	1.1-1.51
618	15.7	157	1.12	1.29-1.76
528	13.411	134.11	1.311	1.51-2.07
451	11.458	114.58	1.534	1.76-2.42
385	9.787	97.87	1.796	2.07-2.83
329	8.362	83.62	2.102	2.42-3.31
281	7.142	71.42	2.461	2.83-3.88
240	6.104	61.04	2.88	3.31-4.54
205	5.199	51.99	3.381	3.89-5.33
175	4.445	44.45	3.955	4.54-6.23
150	3.81	38.1	4.614	5.3-7.27
128	3.254	32.54	5.402	6.21-8.51
109	2.779	27.79	6.326	7.27-9.97
94	2.383	23.83	7.377	8.49-11.6
80	2.024	20.24	8.685	9.97-13.7
69	1.748	17.48	10.057	11.6-15.9
59	1.509	15.09	11.649	13.4-18.4
50	1.27	12.7	13.842	15.9-21.8
44	1.113	11.13	15.794	18.2-24.9
38	0.953	9.53	18.446	21.2-29.1
33	0.833	8.33	21.103	24.3-33.2
28	0.714	7.14	24.62	28.3-38.8
25	0.635	6.35	27.683	31.8-43.6
22	0.556	5.56	31.617	36.4-49.8
19	0.478	4.78	36.776	42.4-58.1
17	0.437	4.37	40.227	46.3-63.5
14	0.358	3.58	49.103	56.6-77.5
13	0.318	3.18	55.28	63.5-87.2
11	0.277	2.77	63.462	72.7-99.7
9	0.239	2.39	73.552	84.8-116