Fourier transform microwave spectrometer using an electric-field cross-correlation technique
Abstract
An electric-field cross-correlation technique is described which can be used for measuring microwave rotational absorption spectra and which has a wide range of applications in other areas. The spectrometer is a novel implementation of a Michelson interferometer. The wide bandwidth source is obtained by modulating a single-frequency signal with a pseudorandom binary sequence. The variable phase delay for determining the cross-correlation function is obtained synthetically from an identical but out-of-phase pseudorandom sequence. The spectrometer operates at X-band frequencies with a bandwidth of approx. =100 MHz and a resolution of approx. =100 kHz. The J = 1reverse arrow0 transition of /sup 16/O/sup 12/C/sup 32/S was observed.
- Authors:
- Publication Date:
- Research Org.:
- Analytical Chemistry Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
- OSTI Identifier:
- 5814374
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Journal Article
- Journal Name:
- Rev. Sci. Instrum.; (United States)
- Additional Journal Information:
- Journal Volume: 57:7
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; MICROWAVE EQUIPMENT; DESIGN; RESOLUTION; SENSITIVITY; OPTICAL SPECTROMETERS; ABSORPTION SPECTROSCOPY; CARBONYLS; CHEMICAL ANALYSIS; CORRELATIONS; ELECTRIC FIELDS; FREQUENCY MODULATION; MICHELSON INTERFEROMETER; OPERATION; SIGNAL-TO-NOISE RATIO; SULFIDES; CHALCOGENIDES; ELECTRONIC EQUIPMENT; EQUIPMENT; INTERFEROMETERS; MEASURING INSTRUMENTS; MODULATION; SPECTROMETERS; SPECTROSCOPY; SULFUR COMPOUNDS; 440300* - Miscellaneous Instruments- (-1989)
Citation Formats
Ramsey, J M, and Whitten, W B. Fourier transform microwave spectrometer using an electric-field cross-correlation technique. United States: N. p., 1986.
Web. doi:10.1063/1.1138597.
Ramsey, J M, & Whitten, W B. Fourier transform microwave spectrometer using an electric-field cross-correlation technique. United States. https://doi.org/10.1063/1.1138597
Ramsey, J M, and Whitten, W B. 1986.
"Fourier transform microwave spectrometer using an electric-field cross-correlation technique". United States. https://doi.org/10.1063/1.1138597.
@article{osti_5814374,
title = {Fourier transform microwave spectrometer using an electric-field cross-correlation technique},
author = {Ramsey, J M and Whitten, W B},
abstractNote = {An electric-field cross-correlation technique is described which can be used for measuring microwave rotational absorption spectra and which has a wide range of applications in other areas. The spectrometer is a novel implementation of a Michelson interferometer. The wide bandwidth source is obtained by modulating a single-frequency signal with a pseudorandom binary sequence. The variable phase delay for determining the cross-correlation function is obtained synthetically from an identical but out-of-phase pseudorandom sequence. The spectrometer operates at X-band frequencies with a bandwidth of approx. =100 MHz and a resolution of approx. =100 kHz. The J = 1reverse arrow0 transition of /sup 16/O/sup 12/C/sup 32/S was observed.},
doi = {10.1063/1.1138597},
url = {https://www.osti.gov/biblio/5814374},
journal = {Rev. Sci. Instrum.; (United States)},
number = ,
volume = 57:7,
place = {United States},
year = {Tue Jul 01 00:00:00 EDT 1986},
month = {Tue Jul 01 00:00:00 EDT 1986}
}