A method for matching high-temperature superconductor resonators used for NMR signal pickup at 400 MHz.
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.
Suddarth
S
S
Duke University Medical Center, Durham, NC 27710, USA. sas@orion.mc.duke.ed
D002138:Calibration; D004553:Electric Conductivity; D004867:Equipment Design; D006358:Hot Temperature; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008853:Microscopy / Q000379:methods*; D012815:Signal Processing, Computer-Assisted