Wave transmission lines and networks – Coupling networks – With impedance matching
Reexamination Certificate
2005-03-08
2005-03-08
Callahan, Timothy P. (Department: 2816)
Wave transmission lines and networks
Coupling networks
With impedance matching
C333S032000, C333S203000
Reexamination Certificate
active
06864758
ABSTRACT:
A resonant circuit includes a transmission line in parallel with a varactor diode. The varactor diode has a capacitance that is variable in response to an applied voltage, which allows for real time impedance matching, attenuation control, and/or compensation for tolerances of other components. The resonant circuit is used with a quarter wavelength transmission line to provide impedance transformation and matching between multiple ports. A high frequency switch provides low current consumption, improved impedance matching, relatively low insertion losses, and excellent isolation between ports.
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Huang Philip
Luen Kong S.
Masucci Robert
Callahan Timothy P.
Freescale Semiconductor Inc.
Luu An T.
Toler Larson & Abel, LLP
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