Apparatus and techniques for Fourier transform millimeter-wave spectroscopy
US9921170B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2014 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Jun 12, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3586
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Examples herein include apparatus and techniques that can be used to perform rotational spectroscopy on gas-phase samples. Such techniques can include using a spectrometer providing frequency synthesis and pulse modulation to provide excitation (e.g., pump or probe pulses) of a gas-phase sample at mm-wave frequencies. Synthesis of such mm-wave frequencies can include use of a frequency multiplier, such as an active multiplier chain (AMC). A free induction decay (FID) elicited by the excitation or other time-domain information can be obtained from the sample, such as down-converted and digitized. A frequency domain representation of the digitized information, such as a Fourier transformed representation, can be used to provide a rotational spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.