Communications: directive radio wave systems and devices (e.g. – Determining distance – Material level within container
Reexamination Certificate
2005-01-18
2008-11-18
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining distance
Material level within container
C342S175000, C073S29000R, C333S032000
Reexamination Certificate
active
07453393
ABSTRACT:
A mechanism for coupling a coaxial waveguide to another waveguide. The mechanism includes a lower or matching waveguide and an impedance transformer. A coaxial port couples the coaxial waveguide to the matching waveguide. The matching waveguide has a waveguide impedance which is close to the impedance of the coaxial waveguide. This arrangement allows matching between the coaxial waveguide and the matching waveguide over a wider frequency band. The impedance transformer couples the matching waveguide to the other waveguide. The impedance transformer comprises a single-stage, double-stage, or multi-stage transformer. The mechanism is suitable for coupling an antenna to a coaxial cable interface in a radar or microwave based level measurement or time of flight ranging systems.
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J.D. Kraus, D.A. Fleisch; Electromagnetics with Applications, 5th Edition, McGraw-Hill 1999, pp. 456-459 & 466-469.
Barker Matthew M
Siemens Milltronics Process Instruments Inc.
Tarcza Thomas H.
Tarolli, Sundheim Covell & Tummino LLP
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