Formula:

Where,
ε_ff  = Effective Dielectric Constant.
Zo =Characteristic Impedance.
ε_r   = Relative Dielectric Constant.
K(K₁),K(K₂),K(K₃)    = Elliptical integrals.
K(K₁),K(K₂),K(K₃) = Complements of  K(K₁),K(K₂) and K(K₃).

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