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Axial Ratio Axial Ratio Circular polarization conversion (CP)

Axial Ratio Circular polarization conversion (CP)  Axial Ratio Axial Ratio Circular polarization conversion (CP) of the proposed Metasurface is further established by the axial ratio (AR) of the reflected wave,                                          𝐴𝑅 = ( |𝑅𝑦𝑦| 2 +|𝑅𝑥𝑦| 2 +√𝑎 |𝑅𝑦𝑦| 2 +|𝑅𝑥𝑦| 2 −√𝑎 ) 0.5  Where                          a = (|Ryy| 4 + |Rxy| 4 + 2|Ryy| 2 |Rxy| 2 cos(2ΔØyx)                                                                   and ∆∅𝐲𝐱 = ∅𝐲𝐲 − ∅𝐱𝐲  The reflection coefficient of the design surface is shown in Figure. The co-polarized and cross-polarized reflected waves have the same magnitude at 9.6 GHz and 17 GHz is 0.7. The surface behaves at these points as a CP which converts the linear EM wave into a circular EM wave. The numerical value of the axial ratio is shown in Figure. At 9.6 GHz and 17 GHz, the axial ratio value is lower than the 3dB dotted black line which shows that the design surface has the ability of CPC, to convert 9.6
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How to design Metamaterial in CST

Meta-Material simulation files

Metamaterial absorbers (MMA) have recently become a new focus of research to develop a perfect resonant system for MMA. MMA is designed to effectively absorb EM radiation. Land yet used a combination of the electrical resonator and cut wire to test this unusual effect for the first time. MMA has different properties and offers excellent features including near-unit absorption, ultra-thin thickness, large incidence angles, low cost, and insensitivity to polarization, making it ideal for antenna designs, reduction of radar cross section (RCS) in stealth technology, photodetectors by enhancing absorption in solar photovoltaic and thermophotovoltaic cells to improve the performance and also in wireless communication.

Given unit cell 



For the Complete Designing watch video:
If you are interested to calculate using an equation apply the following equation⏬


Equation:                                               A(w) = 1 - T(w) - R(w)  

Where A(w) is absorption, T(w) is transmission, and R(w) is the reflection coefficient. There
is no transmission "T(w) = 0" of the incident electromagnetic wave due to the full copper
backing and thus decreasing the reflection from the structure, optimizing the absorption within
the structure A(w) = 1 - R(w).
  


you can watch the list of videos on same channel
  1. open the given link in CST this cst file is designed in 2018 version
  2. Apply port 
  3. simulate
  4. you can also help with video 


click on above download button you will get cst file
if you have any doubt feel free to ask
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