The present invention relates to a variable tuned transmission line stub (102).
The transmission line stub (102) has an input (104) at one end, an
electrical length, and a termination at an opposing end (122). A fluid dielectric
(108) is electrically and magnetically coupled to the transmission line
stub (102) in a first position to produce a first tuned response. The fluid
dielectric (108) is electrically and magnetically decoupled from the transmission
line stub (102) in a second position to produce a second tuned response
which is distinct from the first tuned response.
