Automatic tuning apparatus and method for substance detection us

Details Automatic tuning apparatus and method for substance detection us Automatic tuning apparatus and method for substance detection us

1995-03-08

1997-01-14

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324322, G01R 3328

Patent

active

055943381

ABSTRACT:
Apparatus for tuning a system for detecting a target substance through the use of nuclear quadrupole resonance (NQR) or nuclear magnetic resonance (NMR). The apparatus tunes an RF coil which is employed to excite the substance under test. The tuning apparatus includes a series of fixed value capacitors switched in the tuning circuit by controllable switches. A programmable controller is employed to control the switching and thereby the tuning of the coil.

REFERENCES:
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patent: 5041788 (1991-08-01), Kontor et al.
patent: 5298863 (1994-03-01), Nowak et al.
patent: 5347222 (1994-09-01), Fox et al.
patent: 5451873 (1995-09-01), Freedman et al.
Descriptive Specifications for Collins 180L-2 Automatic Antenna Tuning Unit, 16 pages, cover to cover (1995).

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