Page 1049 - 5G Basics - Core Network Aspects

Transport aspects 2

Figure X.8 – Exponential approximation of insertion loss vs.
frequency for RG-11 coaxial cable

The approximation coefficients for each type of coaxial cable are given in Table X.20 below with MAE
(Mean Absolute Error) < 0.5 dB within 1GHz band.

Table X.20 – Exponential approximation of coaxial cable insertion loss coefficients.

Cable Type/coefficients a b c d

RG-6 0.5904 0.525 0 0
RG-59 0.5904 0.545 0 0.82
RG-11 0.5248 0.5 0.0015 0

In addition to the attenuation approximation, there is interest in simulating the time domain models of the
coaxial cable based on circuit analysis.

Figure X.9 – Typical coaxial cable construction [b-Large]

D = the inner diameter of the shield

d = the outer diameter of the core conductor
The characteristic impedance of the coaxial cable can be calculated as
138
= log ( )
0
√

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