Calculate the total reflectance on a surface

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Discussion Overview

The discussion revolves around calculating the total reflectance of a surface, specifically focusing on the integration of reflection data (S11 or S21) over varying incidence angles. The context includes electromagnetic wave reflection and its implications in photonic crystal structures.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks guidance on how to integrate reflection data from a surface to determine total reflectance for a hemisphere above it.
  • There is a suggestion that the question may be more suited for a different forum, as it might not align with typical electrical engineering topics.
  • Another participant questions whether the inquiry pertains to atomic-level reflection rather than macroscopic phenomena.
  • A different viewpoint asserts that the question is not related to atomic interactions but may involve concepts relevant to antennas.
  • A participant clarifies that S11 and S21 are used to describe reflection and transmission, indicating the focus is on angle-dependent transmission through a photonic crystal structure.
  • The need for a method to calculate total reflectance from the surface of the structure is emphasized, particularly in the context of a wide range of incident frequencies.

Areas of Agreement / Disagreement

Participants express differing views on the context of the question, with some suggesting it may not fit within electrical engineering while others argue it is relevant to electromagnetic wave reflection. The discussion remains unresolved regarding the appropriate classification of the question.

Contextual Notes

There are uncertainties regarding the definitions of terms like S11 and S21, as well as the specific context of the inquiry (academic vs. professional). The integration method for calculating total reflectance is not detailed, leaving assumptions about the mathematical approach unaddressed.

maxclark153
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Hi,

I have a structure and I can calculate the reflection from the surface (S11 or S21)with different incidence angle.

Now I would like to calculate the total reflectance of the hemisphere above the surface.. how can I integrate them all ?
 
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maxclark153 said:
Hi,

I have a structure and I can calculate the reflection from the surface (S11 or S21)with different incidence angle.

Now I would like to calculate the total reflectance of the hemisphere above the surface.. how can I integrate them all ?

What is the context of the question? I'm thinking that I should move this thread to a better matched forum instead of EE?
 
the context is the reflection of electromagnetic wave, isn't it belongs here _?
 
maxclark153 said:
the context is the reflection of electromagnetic wave, isn't it belongs here _?

If I read your question correctly, it is more about reflection at the atomic level, not the macroscopic level that EEs typically work at. Is this question for school, or for work? If for school, which class is it for? That would help me figure out where to put your question.
 
No, I don't think this has anything to do with atoms. Sound like the question might be related to e.g. antennas.

Let me see if I understand the question.
You know S11(theta,phi), where theta and phi are the angles in spherical coordinates.

Are you asking what S11 would be for an isotropic source of EM radiation?
 
It is not a antenna question.. The S11 or S21 is just to describe the reflection and transmission.

So now I am investigated the angle dependent transmission through a photonic crystal structure. ( with incident beam - wide range of freq). Now i need to know how can I calculate the total reflectance from the surface of my structure

thanks
 

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