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Title: 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}
}