Communications: directive radio wave systems and devices (e.g. – Determining distance – Material level within container
Reexamination Certificate
2008-07-29
2010-10-26
Lobo, Ian J (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining distance
Material level within container
Reexamination Certificate
active
07821445
ABSTRACT:
A radar level gauge for measuring a level of a surface of a product in a container has an antenna for transmitting microwaves to the surface and receiving microwaves reflected by the surface, a measurement circuitry for generating said microwaves to be transmitted and for evaluating said received microwaves, a hollow waveguide between the antenna and the measurement circuitry, said waveguide being separated by a gap into a first waveguide member coupled to the antenna and a second waveguide member coupled to the measurement circuitry, and a dielectric barrier arranged in said gap. A dielectric barrier which is simpler in construction and less critical with respect to the wavelength of the microwaves is obtained in that the dielectric barrier comprises a shaft member inserted into the hollow waveguide and extending through at least a portion of the first waveguide member, through the gap and through at least a portion of the second waveguide member.
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patent: 2005/0083229 (2005-04-01), Edvardsson et al.
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Lobo Ian J
Siemens Milltronics Process Instruments Inc.
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