Tunable resonant cavity using conductive fluids

摘要

A tunable resonant system (100) and a method for a varying the resonant characteristics of a resonant cavity (102). The resonant cavity is enclosed by a conductive material that has at least one aperture (104) for coupling the resonant cavity to an RF signal propagating in a circuit device (160). A conductive fluid (108) having a permeability is at least partially disposed within the resonant cavity (102) or a plurality of subcavities (250, 252) within the resonant cavity (202). A dielectric barrier (105) can be provided within the aperture to prevent the conductive fluid from escaping the resonant cavity. A composition processor (101) is adapted for dynamically changing a composition or volume of the conductive fluid to vary or maintain constant a center frequency, a bandwidth, a quality factor (Q) or an impedance of the resonant cavity.