| style="width:100px;" | coaxial_design(z0,er)
| style="width:150px;" | EMAG Python function
| style="width:250px;" | Returns the ratio of radius of the outer conductor to the radius of the inner condutcor conductor of a coaxial transmission line
| style="width:250px;" | z0: characteristic impedance in Ohms, er: core permittivity
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