ARRANGEMENT FOR MEASURING FILL LEVEL WITH A FILL LEVEL MEASURING DEVICE WORKING WITH MICROWAVES
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Accused Products
Abstract
An arrangement for measuring fill level of a fill substance in a container, comprising: a fill level measuring device, wherein the device includes measuring device electronics and an antenna connected to the measuring device electronics; and at least one feedthrough installed in a signal path of the microwave signals or the reflection signals; the feedthrough. The feedthrough comprises a hollow conductor, into which a microwave transparent window is inserted gas tightly. The window comprises: a disk, whose thickness corresponds approximately to a half wavelength or a small integer multiple of the half wavelength of a first, hollow conductor propagation capable, signal mode of the microwave signals at a predetermined signal frequency in the disk; and two matching layers located on oppositely lying, outer surfaces of the disk. The thickness of each matching layer corresponds approximately to a fourth of the wavelength of the first, hollow conductor propagation capable, signal mode of the microwave signals at the predetermined signal frequency in the matching layers.
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Citations
28 Claims
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1-14. -14. (canceled)
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15. An arrangement for measuring the fill level of a fill substance in a container, comprising:
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a fill level measuring device that works with microwaves, wherein the device includes measuring device electronics having a microwave generator for producing microwave signals, and an antenna connected to said measuring device electronics and serving to transmit the microwave signals into the container toward the fill substance and an antenna serving to receive reflection signals of the microwave signals reflected in the container back in the direction of said antenna; and at least one feedthrough installed in a signal path of the microwave signals, wherein said at least one feedthrough includes a hollow conductor, and a microwave transparent window installed gas tightly in said hollow conductor, wherein said window includes; a disk, whose thickness corresponds approximately to a half wavelength or a small integer multiple of the half wavelength of a first, hollow conductor propagation capable, signal mode, especially a fundamental mode, of the microwave signals at a predetermined signal frequency in said disk; and located on oppositely lying, outer surfaces of said disk, whose thickness corresponds approximately to a fourth of the wavelength of the first, hollow conductor propagation capable, signal mode of the microwave signals at the predetermined signal frequency in the matching layers. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A feedthrough for microwave signals, comprising:
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a hollow conductor; and a microwave transparent window installed gas tightly in said hollow conductor, wherein said window includes; a disk, whose thickness corresponds approximately to a half wavelength or a small integer multiple of the half wavelength of the first, hollow conductor propagation capable, signal mode of the microwave signals at a predetermined signal frequency in said disk; and two matching layers located on opposite lying, outer surfaces of said disk, whose thickness corresponds to a fourth of the wavelength of the first, hollow conductor propagation capable, signal mode of the microwave signals at the predetermined signal frequency. - View Dependent Claims (28)
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Specification