An electromagnetic wave propagates between two long, parallel metal plates, with the electric field \( \mathbf{E} \) and magnetic field \( \mathbf{B} \) perpendicular to each other and to the direction of propagation. The characteristic impedance \( Z_0 = \sqrt{\frac{L}{C}} \) is given by:
(where \( L \) and \( C \) are the inductance and capacitance per unit length, \( s \) is the plate separation, and \( w \) is the plate width.)
1
\( Z_0 =\frac{1}{2\pi}\sqrt{\frac{\mu_0}{\epsilon_0}} \frac{w}{s}\)
2
\( Z_0 = 2\pi\sqrt{\frac{\mu_0}{\epsilon_0}} \frac{s}{w}\)
3
\( Z_0 = \sqrt{\frac{\mu_0}{\epsilon_0}} \frac{w}{s}\)
4
\( Z_0 = \sqrt{\frac{\mu_0}{\epsilon_0}} \frac{s}{w}\)