Tunable transmission line stub

摘要

A circuit for processing radio frequency signals. The circuit is a transmission line stub (110) coupled to a fluidic dielectric (108) and includes a composition processor (101) for selectively varying a composition of the fluidic dielectric. Varying the fluid dielectric composition allows the electrical characteristics of the transmission line stub (110) to be dynamically varied in response to a control signal 137. The electrical characteristics that can be varied with the fluid dielectric include, but are not limited to, an electrical length of the stub, a characteristic impedance of the stub, and a frequency response of the stub. The transmission line stub (110) can be electrically shorted to ground or electrically open with respect to ground.