Stub (electronics) - Open Circuited Stub

Open Circuited Stub

The input impedance of a lossless open circuit stub is given by

$Z_\mathrm{OC} = -j Z_0 \cot (\beta l) \,\!$

It follows that whether is positive or negative, the stub will be capacitive or inductive, respectively.

The length of an open circuit stub to act as an Inductor L at an angular frequency of is:

$l = \frac{1}{\beta} \left$

The length of an open circuit stub to act as a capacitor C at the same frequency is:

$l = \frac{1}{\beta} \left$

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