(12) United States Patent
(io) Patent No.: (45) Date of Patent:
US 7,696,750 B2 *Apr. 13, 2010
(54) PARAMETRIC NUCLEAR QUADRUPOLE
RESONANCE SPECTROSCOPY SYSTEM AND
(75) Inventor: Larry W. Fullerton, New Hope, AL
(73) Assignee: Cedar Ridge Research LLC, New
Hope, AL (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 35 days.
This patent is subject to a terminal disclaimer.
(21) Appl.No.: 12/189,172
(22) Filed: Aug. 10, 2008
(65) Prior Publication Data
US 2009/0085565 Al Apr. 2, 2009
Related U.S. Application Data
(63) Continuation of application No. 11/698,775, filed on Jan. 26, 2007, now Pat. No. 7,411,392, which is a continuation of application No. 11/303,711, filed on Dec. 17, 2005, now Pat. No. 7,170,288.
(60) Provisional application No. 60/638,858, filed on Dec. 22, 2004.
(58) Field of Classification Search 324/300,
324/312, 314 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
5,159,617 A * 10/1992 Kingetal 378/57
5,585,722 A * 12/1996 Hosoki et al 324/318
5,642,393 A * 6/1997 Krug et al 378/57
6,127,824 A * 10/2000 Sydney Smith et al 324/300
6,222,364 Bl * 4/2001 Smith etal 324/300
6,541,966 Bl * 4/2003 Keene 324/243
7,170,288 B2* 1/2007 Fullerton 324/300
7,411,392 B2* 8/2008 Fullerton 324/300
* cited by examiner
Primary Examiner—Louis M Arana
(74) Attorney, Agent, or Firm—James Richards
A system and method for probing a specimen to determine one or more components by utilizing a first signal to excite the specimen at a nuclear quadrupole resonant frequency and observing changes in a specimen property. One exemplary property may be dielectric constant. Another exemplary property may be magnetic permeability. In one embodiment, the first signal is unmodulated and a second signal is observed for the presence of modulation at the frequency of the first signal. Alternatively, the first signal may be modulated and the second signal may be observed for the presence of the modulation. A system is disclosed wherein the specimen is excited using the first frequency and a radar at the second frequency is used to observe changes in radar reflectivity of the specimen due to the excitation.
20 Claims, 7 Drawing Sheets