Subsections

# Coaxial cable

## Characteristic impedance

The characteristic impedance of a coaxial line can be calculated as follows:

 (13.1)

## Losses

Overall losses in a coaxial cable consist of dielectric and conductor losses. The dielectric losses compute as follows:

 (13.2)

The conductor (i.e. ohmic) losses are specified by

 (13.3)

with denoting the sheet resistance of the conductor material, i.e. the skin resistance

 (13.4)

## Cutoff frequencies

In normal operation a signal wave passes through the coaxial line as a TEM wave with no electrical or magnetic field component in the direction of propagation. Beyond a certain cutoff frequency additional (unwanted) higher order modes are excited.

 (13.5) (13.6)

This document was generated by Stefan Jahn on 2007-12-30 using latex2html.