Avtech recommends Pasternack Enterprises and Digi-Key as suppliers of 50 Ohm coaxial cables and adapters, due to their broad selection and rapid delivery. Several useful cable types from these suppliers are listed below:
| Bulk Cable Type | Application | Diameter, Rigidity | Outer Material | Maximum Operating Voltage | Maximum Power at 1 GHz | Attenuation at 1 GHz per 100 ft | $/ft (approx, bulk) | Supplier & Part Numbers* |
|---|---|---|---|---|---|---|---|---|
| SR402FL | maximum performance, high speed, low loss |
0.141" re-shapable semi-rigid |
tinned copper |
1900 VRMS | 450 W | 12 dB | $3.50 | Pasternack PE-SR402FL-24 (bulk cable, no connectors) |
| SR405FL | high-speed, low loss, compact |
0.085" re-shapable semi-rigid |
tinned copper |
1500 VRMS | 130 W | 22 dB | $3.50 | Pasternack PE3867-24 (SMA male to SMA male) |
| T591RML | low loss, low cost |
0.195" solid-core, moderately flexible |
black polyethylene |
1000 VRMS | 150 W | 11.5 dB | $0.60 | Pasternack PE-T591RML-24 (bulk cable, no connectors) |
| RG316/U | general use, small & rugged |
0.102" flexible |
clear propylene |
1200 VRMS | 160 W | 30 dB | $0.60 | Digi-Key: Johnson Components 415-0029-024 (SMA male to SMA male) |
| RG174A/U | general use, high loss, low cost |
0.100" flexible |
black PVC |
1500 VRMS | 16 W | 31 dB | $0.17 | Pasternack PE3353-24 (SMA male to SMA male) |
| RG58C/U | general use, medium loss, lost cost |
0.195" flexible |
black PVC |
1900 VRMS | 44 W | 20 dB | $0.22 | Pasternack PE3067-24 (BNC male to BNC male) |
| Pasternack PE3369-24 (SMA male to SMA male) | ||||||||
| RG214/U | high voltage | 0.425" flexible |
black PVC |
5000 VRMS | 190 W | 9 dB | $2.20 | Pasternack PE3117-24 (SHV plug to SHV plug) |
* part numbers given for 24 inch (60 cm) length. Confirm the part number and specifications with the supplier. This table is only a general guide.
SMA connectors are recommended for very-high-speed applications. BNC connectors are recommended for lower-speed, more general-purpose applications.
For applications requiring the use of transmission lines with low characteristic impedance (<< 50 Ohms), consider using the Avtech LZ series, or connecting several 50 Ohm cables in parallel.
