Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1982-08-06
1985-03-19
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324300, G01R 3308
Patent
active
045062242
ABSTRACT:
An apparatus for generating a substantially homogeneous magnetic high-frequency field and/or for receiving high-frequency signals in a nuclear magnetic resonance apparatus, such as zeugmatography. The apparatus contains at least two conductor sections of predetermined length which extend on a least one imaginary cylindrical surface parallel to the axial direction of the cylindrical surface. The conductor sections are adapted to carry current in opposite directions when connected to either external feeding or external receiving devices. In one embodiment, the arrangement operates at frequencies of illustratively 20 MHz so as to provide an improved signal-to-noise ratio over prior art systems. An envelope formed of electrically conductive material is adapted to be impervious to high-frequency energy, but permeable to low-frequency energy, and further adapted to be concentrically arranged with respect to the imaginary cylindrical surface about the conductor sections. The ends of the conductor sections which are arranged distal to the energy or receiving devices are terminated by means which reflect waves of high-frequency energy to produce in-phase high-frequency fields.
REFERENCES:
patent: 3461350 (1969-08-01), Rioux
patent: 4310799 (1982-01-01), Hutchison
patent: 4339718 (1982-07-01), Ball
patent: 4362993 (1982-12-01), Young
Siemens Aktiengsellschaft
Tokar Michael J.
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