Design and Implementation of An RF Power Amplifier Used in Nuclear Magnetic Resonance Spectrometer

Abstract

Abstract:

The design and implementation of a broadband RF power amplifier used in nuclear magnetic resonance spectrometer were introduced. Based on a two-stage architecture, the power amplifier was composed of a high frequency module, a broadband module and two directional couplers, to meet various requirements of NMR experiments. The rise time, fall time and power linearity of the power amplifier was measured on a home-built 500 MHz NMR spectrometer. Comparison of NMR sensitivity demonstrated good performance of this power amplifier in common NMR experiments.

Key words: NMR, power amplifier, transmission line transformer, matching circuits

CLC Number:

O482.53

LI You, MAO Wen-Ping, WANG Hui-Wang, LIU Yang, CHEN Fang, LIU Chao-Yang. Design and Implementation of An RF Power Amplifier Used in Nuclear Magnetic Resonance Spectrometer[J]. Chinese Journal of Magnetic Resonance, 2011, 28(3): 326-338.

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Design and Implementation of An RF Power Amplifier Used in Nuclear Magnetic Resonance Spectrometer

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