Communications: directive radio wave systems and devices (e.g. – Determining distance – Material level within container
Reexamination Certificate
2006-09-12
2006-09-12
Pihulic, Daniel (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining distance
Material level within container
C342S175000
Reexamination Certificate
active
07106248
ABSTRACT:
A process control instrument comprises a control for generating or receiving a high frequency signal. A waveguide comprises a cylindrical housing closed at one end by a rear wall. A loop launcher is operatively connected to the control and comprises a wire having a first straight leg electrically connected at one end to the control and extending into the waveguide a first select length. A second straight leg is connected at one end to the rear wall and extends into the waveguide a second select length, greater than the first select length. A curved middle section connects the other ends of the first and second straight legs. An antenna is operatively coupled to the waveguide.
REFERENCES:
patent: 5703289 (1997-12-01), Mulrooney
patent: 6062095 (2000-05-01), Mulrooney et al.
patent: 6202485 (2001-03-01), Wien et al.
Benway John S.
Bleszynski Stanislaw
Janitch Paul G.
Reynolds Stephen A.
Magnetrol International Inc.
Pihulic Daniel
Wood Phillips Katz Clark & Mortimer
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