RF delay lines with variable composition fluidic dielectric

Details RF delay lines with variable composition fluidic dielectric RF delay lines with variable composition fluidic dielectric

2005-08-16

2005-08-16

Jones, Stephen E. (Department: 2817)

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

C333S161000, C333S032000

Reexamination Certificate

active

06930568

ABSTRACT:
Method and apparatus for producing a variable delay for an RF signal. The method can include the step of propagating the RF signal along an RF transmission line, coupling a fluidic dielectric to the RF transmission line, and dynamically changing a composition of the fluidic dielectric to selectively vary its permittivity in response to a time delay control signal. The method can also include the step of dynamically changing a composition of the fluidic dielectric to vary its permeability. The permittivity and the permeability can be varied concurrently in response to the time delay control signal. In a preferred embodiment the method can include selectively varying the permeability concurrently with the permittivity to maintain a characteristic impedance of the transmission line approximately constant.

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