Through air radar level transmitter
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United States of America Patent
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-
Sep 5, 2006
Grant Date -
Apr 8, 2004
app pub date -
Sep 30, 2003
filing date -
Sep 30, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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