There is a similar simple approximation for a coplanar waveguide short-circuit, also given in [54]. The short circuit is inductive in nature.

The equivalent length extension associated with the fringing fields is

Equation (12.29) is valid when the metalization thickness does not become too large ().

The short end inductance can be written in terms of the inductance per unit length and the wave resistance.

(12.30) |

According to W.J.Getsinger [55] the CPW short-circuit inductance per unit length can also be modeled by

(12.31) |

based on his duality [56] theory.

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