초록 ▼

A waveguide for microwave radar level gages that includes a process sealed barrier in the waveguide that is impedance matched with bore transition sections of the waveguide at opposite ends thereof. The impedance matching results in positioning of the tapered end of the barrier offset from the ends

A waveguide for microwave radar level gages that includes a process sealed barrier in the waveguide that is impedance matched with bore transition sections of the waveguide at opposite ends thereof. The impedance matching results in positioning of the tapered end of the barrier offset from the ends of the bore transition sections.

대표청구항 ▼

[ What is claimed is:] [6.] A waveguide for use in a process sealed level gage comprising:a source of microwave energy to be transmitted through the waveguide, said waveguide comprising a bore, said bore having a main portion of a first cross sectional area, and a bore transition portion connecting

[ What is claimed is:] [6.] A waveguide for use in a process sealed level gage comprising:a source of microwave energy to be transmitted through the waveguide, said waveguide comprising a bore, said bore having a main portion of a first cross sectional area, and a bore transition portion connecting to said main portion and extending to an opening, said opening being of different cross sectional area than the main bore portion, and a elongated barrier of a low dielectric material filling the main bore portion to provide a process seal, said barrier having a tapered end section projecting into the bore transition portion, said barrier tapered end section tapering to a barrier end adjacent the opening, the barrier end projecting beyond the opening at the end of the bore transition portion, andthe elongated barrier of a low dielectric material having a length of insertion adjustable experimentally to optimize transmission.