RF Transmission Line Loss

Coaxial / Transmission Line Loss, VHF/UHF/

 

Coax / LDF / FSJ, Feedline Loss/Attenuation in Amateur and ISM Bands in dB - 100 ft (dB - 100 m)

db figures are for Matched Feedline, Loss/Attenuation is greater with SWR

Cable Type 50 MHz 144 MHz 220 MHz 450 MHz 915 MHz 1.2 GHz 2.4 GHz 5.8 GHz
RG-58A 3.2
(10.4)		 6.2
(20.3)		 7.4
(24.3)		 10.6
(34.8)		 16.5
(54.1)		 21.1
(69.2)		 32.2
(105.6)		 51.6
(169.2)
RG-59 2.4
(7.7)		 4.1
(13.4)		 5.1
(16.9)		 7.6
(24.6)		 -
(-)		 -
(-)		 20.1
(66.0)		 -
(-)
RG-6U CATV 1.2
(3.8)		 2.2
(7.2)		 2.9
(9.3)		 4.5
(14.6)		 -
(-)		 -
(-)		 15.0
(50.0)		 -
(-)
RG-11 1.4
(4.5)		 2.4
(7.9)		 3.0
(9.9)		 4.4
(14.6)		 -
(-)		 -
(-)		 12.1
(39.5)		 -
(-)
9258 (RG-8/X) 2.1
(7.0)		 4.7
(15.4) 		6.0
(19.7)		 8.6
(28.2)		 12.8
(42.0)		 15.9
(52.8)		 23.1
(75.8)		 40.9
(134.2)
LMR-240 1.7
(5.7)		 3.0
(9.8)		 3.7
(12.1)		 5.3
(17.4)		 7.6
(24.9)		 9.2
(30.2)		 12.9
(42.3)		 20.4
(66.9)
RG-213/214 1.4
(4.7)		 2.8
(9.2)		 3.5
(11.5)		 5.2
(17.1)		 8.0
(26.2)		 10.1
(33.1)		 15.2
(49.9)		 28.6
(93.8)
9913 0.8
(2.8)		 1.6
(5.2)		 1.9
(6.2)		 2.8
(9.2)		 4.2
(13.8)		 5.2
(17.1)		 7.7
(25.3)		 13.8
(45.3)
LMR-400 0.88
(2.8)		 1.5
(4.9)		 1.8
(5.9)		 2.7
(8.9)		 3.9
(12.8)		 4.8
(15.7)		 6.8
(22.3)		 10.8
(35.4)
3/8"LDF2-50 0.7
(2.4)		 1.3
(4.3)		 1.6
(5.2)		 2.3
(7.5)		 3.4
(11.2)		 4.2
(13.8)		 5.9
(19.4)		 8.1
(26.6)
3/8"FSJ2-50 0.8
(2.8)		 1.5
(4.7)		 1.8
(6.0)		 2.6
(8.7)		 3.9
(12.7)		 4.5
(14.8)		 6.6
(21.8)		 11.0
(36.0)
LMR-600 0.5
(1.8)		 0.96
(3.1)		 1.2
(3.9)		 1.7
(5.6)		 2.5
(8.2)		 3.1
(10.2)		 4.4
(14.4)		 7.3
(23.9)
1/2"FSJ4-50 0.7
(2.4)		 1.2
(4.1)		 1.6
(5.2)		 2.3
(7.6)		 3.4
(11.2)		 4.0
(13.0)		 6.0
(19.6)		 10.2
(33.7)
1/2"LDF4-50 0.5
(1.5)		 0.85
(2.8)		 1.1
(3.6)		 1.5
(4.9)		 2.2
(7.2)		 2.7
(8.9)		 3.9
(12.8)		 6.6
(21.6)
7/8"LDF5-50 0.25
(0.8)		 0.46
(1.5)		 0.56
(2.1)		 0.83
(2.7)		 1.2
(3.9) 		1.5
(4.9)		 2.3
(7.5)		 3.8
(12.5)
1 1/4" LDF6-50 0.17
(0.58)		 0.34
(1.1)		 0.42
(1.4)		 0.62
(2.0)		 0.91
(3.0)		 1.1
(3.6)		 1.7
(5.6)		 2.8
(9.2)
15/8" LDF 0.14
(0.47)		 0.28
(0.92)		 0.35
(1.1)		 0.52
(1.7)		 0.77
(2.5)		 0.96
(3.1)		 1.4
(4.6)		 2.5
(8.2)