Title :
A method for matching high-temperature superconductor resonators used for NMR signal pickup at 400 MHz
Abstract :
This paper describes a method for matching high-temperature superconducting nuclear magnetic resonance (NMR) signal pickup coils to field-effect transistor (FET) preamplifiers using amplifier-specific noise figure and gain parameters to obtain a matching compromise that improves gain flatness for a given permissible noise figure. A technique for obtaining these parameters is also described in an appendix.
Keywords :
biomedical NMR; biomedical electronics; biomedical equipment; field effect transistors; pick-ups; preamplifiers; resonators; superconducting coils; 400 MHz; NMR signal pickup; amplifier-specific noise figure; field-effect transistor preamplifiers; gain flatness improvement; gain parameters; high-temperature superconductor resonators matching method; magnetic resonance imaging; matching compromise; medical diagnostic imaging; Bandwidth; High temperature superconductors; Immune system; Noise figure; Nuclear magnetic resonance; Preamplifiers; Superconducting coils; Superconducting device noise; Superconducting microwave devices; Switches; Calibration; Electric Conductivity; Equipment Design; Heat; Magnetic Resonance Spectroscopy; Microscopy; Signal Processing, Computer-Assisted;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
