Short Answer
Coaxial cables transport RF signals between radio technology and antennas. Cable loss occurs, depending on frequency, cable length, cable type, connectors, installation quality, and aging. The higher the frequency, and the longer or poorer the cable, the greater the attenuation. Good radio planning therefore considers cable runs early on.
A strong repeater and a good antenna are of little help if too much signal is lost in the cable on the way to the antenna.
What Influences Cable Loss
| Factor | Impact |
|---|---|
| Length | Longer cables cause more attenuation. |
| Frequency | Higher frequencies often have greater losses. |
| Cable Type | Quality and diameter are critical. |
| Connectors | Poor installation creates additional losses. |
| Environment | Moisture, bends, and aging reduce performance. |
Planning Rules
- Plan cable runs short and clean.
- Select cable type according to frequency band and length.
- Install and protect connectors properly.
- Account for attenuation in link budget and measurements.
- Document cables and connectors.
Common Errors
Cables are planned too late, chosen too thin, or routed unnecessarily long. Incorrectly installed connectors and moisture also cause hard-to-detect radio issues.
FAQ
What is cable loss?
The signal loss that occurs when transporting through a coaxial cable.
Why is cable loss important for UHF?
Because higher frequencies are often more affected by cable attenuation.
Can a good cable improve range?
It can reduce losses and thereby better deliver existing system performance to the antenna.
Should cables be measured?
Yes, especially for professional systems, particularly with repeaters, building radios, and long cable runs.
Sources and Recency
This page was created on 06.07.2026. Technical and regulatory information must be aligned with current manufacturer data, standards, frequency specifications, and site conditions for specific projects.