公开(公告)号：US10649051B2

公开(公告)日：2020-05-12

申请号：US15851620

申请日：2017-12-21

Applicant: RAYTHEON COMPANY

Inventor： Benjamin P. Dolgin ,  Thomas Lavedas ,  Joseph J. Fraundorfer

IPC: G01R33/44 ,  G01R33/46 ,  G01N24/08

Abstract: A system and method for detecting a nucleus of interest in a chemical using a nuclear quadrupole resonance transition. An excitation pulse is used to excite one or more nuclei of interest, if they present in a sample, to an excited state, the energy of which depends on the magnetic field in the sample. The magnetic field in the sample is modulated, after the end of the excitation pulse, while the nuclei of interest decay from the excited state, so that the radiation they emit is frequency modulated. The frequency modulation is detected in the emitted radiation. In some embodiments a DC magnetic field is applied to the sample, during the application of the excitation pulse, to tune the frequency of the transition being excited.

公开(公告)号：US10340965B2

公开(公告)日：2019-07-02

申请号：US15964477

申请日：2018-04-27

Applicant: RAYTHEON COMPANY

Inventor： Benjamin P. Dolgin ,  Thomas Lavedas ,  Joseph J. Fraundorfer

IPC: H04B1/04 ,  H04B1/14 ,  H03D7/14 ,  H04B1/10

Abstract: Examples of passive diode-based transmitter detuning circuits and low-voltage active diode-based and receiver detuning circuits are provided.

公开(公告)号：US20180316372A1

公开(公告)日：2018-11-01

申请号：US15964477

申请日：2018-04-27

Applicant: RAYTHEON COMPANY

Inventor： Benjamin P. Dolgin ,  Thomas Lavedas ,  Joseph J. Fraundorfer

IPC: H04B1/14 ,  H03D7/14 ,  H04B1/10

CPC classification number: H04B1/14 ,  H03D7/1408 ,  H03D2200/0013 ,  H04B1/1018 ,  H04B1/1027 ,  H04B2001/1072

Abstract: Examples of passive diode-based transmitter detuning circuits and low-voltage active diode-based and receiver detuning circuits are provided.