波谱学杂志2017，Vol.34Issue(3)：357-364,8.DOI:10.11938/cjmr20162517
DNP-EPR多功能谱仪中微波桥的设计与实现
Microwave Bridge in a DNP-EPR Multifunctional Spectrometer:Design and Implementation
摘要
Abstract
A multi-functional spectrometer, capable of dynamic nuclear polarization (DNP) and electron paramagnetic resonance (EPR) experiments, is put forward on the basis of a home-built DNP-magnetic resonance imaging (MRI) spectrometer. A key component of the multi-functional spectrometer, microwave bridge, was designed and implemented. The microwave bridge was used to integrate the microwave transmitter of the DNP spectrometer and to enable the EPR capability. A transmitter system with high spectrum purity and dynamic range as well as a detector with low noise figure were also implemented by structure designing, circuit simulation and system evaluation. DNP and continuous wave EPR experiments were conducted to verify the reliability of the microwave bridge.关键词
动态核极化(DNP)/电子顺磁共振(EPR)/微波桥/低噪声放大器(LNA)Key words
dynamic nuclear polarization (DNP)/electron paramagnetic resonance (EPR)/microwave bridge/low noise amplifier (LNA)分类
数理科学引用本文复制引用
刘早,朱天雄,贺玉贵,陈俊飞,冯继文,刘朝阳..DNP-EPR多功能谱仪中微波桥的设计与实现[J].波谱学杂志,2017,34(3):357-364,8.基金项目
中国科学院国家重大科研装备研制资助项目(ZDYZ2010-2) （ZDYZ2010-2）
国家自然科学基金资助项目(11405264, 11575287). （11405264, 11575287）
