Amateur Band	EIA Type Designation	ID in Inches	ID in cm	Lower useful Freq. in GHz	Upper useful Freq. in GHz
902 MHz	WC 992	9.915	25.184	0.800	1.100
1296 MHz	WC 724	7.235	18.377	1.100	1.510
1296 MHz	WC 618	6.181	15.700	1.290	1.760
2304 MHz	WC 451	4.511	11.458	1.760	2.420
2304	WC 385	3.853	9.7870	2.070	2.830
3456	WC 281	2.182	7.1420	2.830	3.880
5760	WC 175	1.750	4.4450	4.540	6.230
5760	WC 150	1.500	3.8100	5.300	7.270
10 GHz	WC 94	0.938	2.3830	8.490	11.600
10GHZ	WC 80	0.797	2.0240	9.970	13.700
24 GHz	WC 44	0.438	1.1130	18.200	24.900
24 GHz	WC 38	0.375	0.9530	21.200	29.100
24 GWHz	WC 33	0.238	0.8330	24.300	33.200
48 GHz	WC 22	0.219	0.5560	36.400	49.800
48 GHz	WC 19	0.188	0.4780	42.400	58.100
48 GHz	WC 17	0.172	0.4370	46.300	63.500