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:
Sep. 12, 1989
Filed:
Jan. 09, 1989
Michael A Flemming, Oxfordshire, GB;
Graham N Plested, Oxfordshire, GB;
United Kingdom Atomic Energy Authority, London, GB;
Abstract
A method of characterizing a material uses an element in which microwaves can propagate and can resonate, such as a weakly-coupled isolated microstrip device or a microwave cavity, arranged so that fringing fields from the element interact with the material. Microwaves are coupled into the element at a frequency near a resonance, and a modulating signal is applied so as to modulate the response of the element. Measurements of both the mean response and the modulation of the response enable the dielectric constant and dielectric loss of the material to be determined. Modulation may be applied to the frequency of the microwaves, or to the electrical parameters of the element.