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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