Correlation between Scattering Matrix, Return Loss and Interface Reflection Loss in Nicolson Rose Wear Approximation

Wakid Ali Muntoha, Adam Badra Cahaya, Azwar Manaf


The phenomenon behind the absorption of electromagnetic waves by absorbing
materials is resonance phenomenon. When there is a similarity between the value of the
impedance of electromagnetic waves in the air and the impedance of the material, the
absorption of energy by the material is maximized. The phenomenon is measured using an
auxiliary instrument, namely the Vector Network Analyzer. This instrument is very effective for
calculating the absorption value of electromagnetic waves. However, the Vector Network
Analyzer instrument which is mostly available in Indonesian research institutions cannot directly
display the reflection loss of the electromagnetic wave absorbing material. An effective method
that is effective for calculating the absorption in electromagnetic wave absorbing material is
Nicolson Rose Wear method. In this article, we design a computational tool based on Nicolson
Rose Wear approximation to calculate the reflection loss values from scattering matrix and
comparing it with return loss, which is often mistook as reflection loss.


Nicolson-Ross-Wear, Permeability, Permittivity, Reflection Loss

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