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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-polariz...
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Dielectric Properties of Solids

Dielectric Properties of Solids

 The dielectric property of solid is the response of solids (insulators) to the applied electric field “E”. It is known that insulators have no free electrons and so when an external electric field is applied, it dominates the internal electric field of the solids (insulators) and distorts the internal energy (Nucleus and Electrons). They give rise to dipoles and hence the materials are polarized. The material is electrically neutral but produces an electric field both outside and inside.







Dielectric Materials: 

➢ In solid the dielectric (insulator) the electrons are tightly bound to their parent atoms.

 ➢ Charge separation take place, in the presence of electric field. 

➢ These are neutral but produce electric field both inside and outside the sample.

 ➢ Some materials have naturally occurring in the shape that there is little separation between the positive and negative centre. There are called “Permanently Dipoles Materials”.

 ➢ And there are some materials, where positive and negative centre coincides. However, if the electric field is applied; the change occurs and the positive and negative charge separated called “Induced Dipoles Materials”. So change separation happens only in the presence of electric field. 

Polarization vector:

                                             𝑷⃗ = 𝟏 𝑽 ∑ℙ⃗ (1.1)

 Where 𝑃⃗ is Polarization vector and is define as the total dipole moment per unit volume.


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