Apparatus and method for transmission line impedance tuning using periodic capacitive stubs

摘要

A method of tuning transmission line impedance includes the step of determining a desired impedance for a transmission line. A capacitive stub is periodically added to the transmission line. A physical quantity to be removed from each of the capacitive stubs to achieve the desired impedance is identified. The identified physical quantity is then removed to establish the desired transmission line impedance. A method of forming an impedance bridge includes the step of affixing a set of capacitive stubs to a bridging transmission line that has a first end and a second end. The vertical height of the set of capacitive stubs is tapered from the first end to the second end to form an increasingly high impedance between the first end and the second end.