Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Reexamination Certificate
2006-06-27
2006-06-27
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
C333S207000, C333S222000, C333S203000
Reexamination Certificate
active
07068128
ABSTRACT:
A compact combline resonator and filter. The annular radius of inductive posts are modulated along the length of the inductive post to establish a desired inductive value for a series inductive capacitive resonator. The filter has a waveguide channel with an input port and an output port. One or more of the inductive posts are located in the waveguide channel, the one or more inductive posts providing filter poles and coupling the input port to the output port, each inductive post being electrically connected at one post end to a wall of the waveguide channel and providing a capacitance gap between an other post end and an opposing wall of the waveguide channel to provide a series inductive capacitive resonator.
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Macchiarella et al., “Combline Filters Using Conical Resonators”, 33rd European Microwave Conference, Oct. 7-9, 2003, pp. 167-170.
CST advertisement inMicrowave Journal, Nov. 2003, Horizon House Publications Inc., Norwood, Massachusetts, USA.
Guohua Shen and Djuradj Budimir, “Combline Filters Using Periodically Loaded Resonators,”Microwave and Optical Technology Letters, Feb. 5, 2004, pp. 189-191, vol. 40, No. 3, Wiley Periodicals, Inc., Hoboken, New Jersey, USA.
Macdonald Perry
Petre Peter
Christie Parker & Hale LLP
Ham Seungsook
HRL Laboratories LLC
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