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System and method for monitoring substances and reactions

  • US 20010019271A1
  • Filed: 12/21/2000
  • Published: 09/06/2001
  • Est. Priority Date: 07/26/1994
  • Status: Active Grant
First Claim
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1. A system for detecting the composition and microstructure of materials, comprising:

  • an RF oscillator, which includes a gain element capable of providing substantial gain at frequencies greater than 100 MHz;

    a feedback path, coupling the output of said gain element to the input thereof, said feedback path including a tunable resonant circuit;

    a single electromagnetic propagation structure which is RF-coupled, in a single-ended configuration, to said oscillator and in which electromagnetic wave propagation is electrically loaded by a portion of the material to be characterized; and

    circuitry connected to monitor the frequency of said oscillator to ascertain changes in the composition and/or microstructure of the material.

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