The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 1989
Filed:
Mar. 04, 1988
Michael A Flemming, Abingdon, GB;
Graham N Plested, Didcot, GB;
United Kingdom Atomic Energy Authority, London, GB;
Abstract
A microwave probe for determining properties of a fluid medium, and particularly for separating measuring dielectric constant and dielectric loss, comprises an insulating substrate metallized on one face, an electrically isolated, ring-shaped, resonant element defined on the opposite face, and shielded means to couple microwaves into and from the element such that the element can undergo a resonance. The resonant frequency depends on the dielectric constant of an adjacent medium, while the Q-factor of the resonance depends on the dielectric loss of the medium. In one method of operation microwaves are coupled into the element to force an oscillation, and the driving frquency is varied to obtain a resonance.