Circuit-slide-19

Circuit-slide-19 - Normal Incidence on an Interface...

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Normal Incidence on an Interface Consider a planar interface between two unbounded media, and a uniform plane wave with normal incidence on the interface .
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Because of the medium discontinuity , the incident wave experiences a partial reflection at the interface. In medium 2 , only a forward transmitted wave exists The total fields at the interface must satisfy the boundary conditions for electromagnetic fields. Without loss of generality, we assume the following orientation for the electromagnetic fields of the waves
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Recalling the solution for Helmholtz equation , the phasor fields in the medium 1 can be written as
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The forward transmitted wave in medium 2 is given by
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Both fields are parallel to the interface. The boundary conditions indicate that the total fields are continuous at the interface. Note that we are assuming a finite conductivity , therefore no surface current exists and the tangent magnetic field is also continuous. The interface is located at
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This note was uploaded on 03/09/2012 for the course ECE 450 taught by Professor E.kudeki during the Spring '12 term at Illinois College.

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Circuit-slide-19 - Normal Incidence on an Interface...

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