An RF switch (100) which includes a waveguide structure (102) having at
least a first (104) and second port (106). The RF switch (100) also
includes a dielectric structure defining at least a first cavity (136)
disposed at a juncture between the first and second ports. The dielectric
structure can define a plurality of elongated fluid cavities (136) at the
juncture extending between opposing walls (116, 118) of the waveguide
structure (102). The RF switch (100) also can include a fluid control
system (150) that moves a conductive fluid (138) into the first cavity
(136) in a first operational state and at least partially purges the
conductive fluid (136) from the first cavity (138) in a second operational
state. A conductive path can be provided between the conductive fluid and
at least one wall (1116, 118) of the waveguide structure (102).
