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- W142495142 abstract "Terahertz heterodyne receivers typically use double sideband (DSB) mixers. The precise knowledge of the receiver sideband ratio (SBR) is a fundamental requirement for the calibration of the data taken with this type of receivers. At the moment the spectroscopic techniques developed for submillimeter analysis, such as Martin Pupplet interferometry and Gas cell technique rely on a calibrated filter system and suffer from inaccuracies caused by standing waves. Here, we present sideband ratio measurements of a submillimeter receiver in the 600-720 GHz band (ALMA Band 9) using a Michelson interferometer as input filter. The main requirement for this method is that the resolution mu st be high enough to allow distinguishing between the two side bands of the DSB receiver. The advantages of this method are, first, the simplicity of the experimental setup, and, second, the possibility to identify and calibrate out standing waves in the signal and local oscillator paths. In our procedure we use, in fact, exactly the same receiver configuration for both direct and heterodyne detections. Although the results are still preliminary, we have found a good agreement in the SBR measured with both configurations." @default.
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- W142495142 date "2007-01-01" @default.
- W142495142 modified "2023-09-23" @default.
- W142495142 title "Sideband ratio in double sideband receivers with a Michelson interferometer" @default.
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- W142495142 hasPublicationYear "2007" @default.
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