Through air radar level transmitter

Details Through air radar level transmitter Through air radar level transmitter

2006-09-05

2006-09-05

Nguyen, Hoang V. (Department: 2821)

Communications: radio wave antennas

Antennas

Wave guide type

C343S786000, C333S252000, C333S254000, C073S29000R

Reexamination Certificate

active

07102584

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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