Before revision: The length of a stub to act as a capacitor C at an angular frequency of is then given by: The length of a stub to act as an inductor L at the same frequency is given by: Open circuited stub The input impedance of a lossless open circuit stub is given by It follows that whether is positive or negative, the stub will be capacitive or inductive, respectively.
After revision: depending onThe length of a stub to act as a capacitor C at an angular frequency of is then given by: The length of a stub to act as an inductor L at the same frequency is given by: Open circuited stub The input impedance of a lossless open circuit stub is given by It follows that whether is positive or negative, the stub will be capacitive or inductive, respectively.