**1 Answer**

written 9 months ago by |

**Solution:**

**Resistive loss:**

Resistive losses within the coax cable arise from the resistance of the conductors and the current flowing in the conductor results in heat being dissipated.

The actual area through which the current flows in the conductor is limited by the skin effect, which becomes progressively more apparent as the frequency rises.

To help overcome this multi-stranded conductors are often used.

To reduce the level of loss due to the coax cable, the conductive area must be increased and this results in low-loss coax cables being made larger.

However, it is found that the resistive losses increase as the square root of the frequency.

**Dielectric loss:**

The dielectric loss represents another of the major losses arising in most coax cables.

Again the power is lost as dielectric loss is dissipated as heat.

It is found that the dielectric loss is independent of the size of the RF cable, but it does increase linearly with frequency.

This means that resistive losses normally dominate at lower frequencies.

However as resistive losses increase as the square root of frequency, and dielectric losses increase linearly, the dielectric losses dominate at higher frequencies.