发明名称 |
Transmit-Receive Switching Circuit for NMR Spectrometer and NMR Spectrometer Incorporating Same |
摘要 |
A transmit-receive switching circuit is offered which is for use in an NMR spectrometer that employs a solid-state NMR probe using a cooled detection coil. The switching circuit is cryogenically cooled to reduce thermal noise in use. The switching circuit has a first terminal for applying high-power RF pulses sent in from the power amplifier of the NMR spectrometer, a second terminal for sending the RF pulses applied from the first terminal to the NMR detector via crossed-diodes and for receiving and entering a low-power NMR signal detected by the NMR detector, and a third terminal for sending the NMR signal entered from the second terminal toward a preamplifier. Plural stages of shunts are connected to the transmission line connecting the second and third terminals such that one stage of shunt corresponds to a 90° phase shift in the RF radiation.
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申请公布号 |
US2011187371(A1) |
申请公布日期 |
2011.08.04 |
申请号 |
US200913121763 |
申请日期 |
2009.10.08 |
申请人 |
JEOL LTD.;KYOTO UNIVERSITY |
发明人 |
TAKEGOSHI KIYONORI;MIZUNO TAKASHI |
分类号 |
G01R33/28 |
主分类号 |
G01R33/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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