Transmission Lines

I use these numbers ... from Reference Data for Radio Engineers.

50-ohm Coaxial Cables
Average Power Handling and Loss

RG-213/U
30 MHz 1500 watts 1.2 dB / 100 ft used to be RG-8A/U
450 MHz 300 watts 5.5 dB / 100 ft

RG-8X
30 MHz 500 watts 1.9 dB / 100 ft RG-59/U sized o.d.
450 MHz 150 watts 9.0 dB / 100 ft

RG-58C/U
30 MHz 350 watts 3.0 dB / 100 ft
450 MHz 50 watts 15 dB / 100 ft

50-ohm Connectors

Frequency Range

UHF
... DC to 500 MHz
... TE11 mode cuts on at 4 GHz in plastic
... useful to 1.3 GHz
... not impedance controlled
... center pin same as banana plug

N
... DC to 11 GHz
... TE11 mode cuts on at 19 GHz in air
... TE11 mode cuts on at 13 GHz in plastic
... still used thru 26.5 GHz

SMA
DC to 26.5 GHz
... APC 3.5 used thru 26.5 GHz

Connector Average Power Handling ... TBD

UHF

N

SMA

Try EIA RS-199 and MIL-HDBK-216 for more data.