Reduction of Systematic Errors in Diagnostic Receivers Through the Use of Balanced Dicke-Switching and Y-Factor Noise Calibrations

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Receivers designed for diagnostic applications range from those having moderate sensitivity to those possessing large dynamic range. Digital receivers have a dynamic range which are a function of the number of bits represented by the ADC and subsequent processing. If some of this range is sacrificed for extreme sensitivity, noise power can then be used to perform two-point load calibrations. Since load temperatures can be precisely determined, the receiver can be quickly and accurately characterized; minute changes in system gain can then be detected, and systematic errors corrected. In addition, using receiver pairs in a balanced approach to measuring X+, ... continued below

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John Musson, Trent Allison, Roger Flood, Jianxun Yan May 1, 2009.

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Receivers designed for diagnostic applications range from those having moderate sensitivity to those possessing large dynamic range. Digital receivers have a dynamic range which are a function of the number of bits represented by the ADC and subsequent processing. If some of this range is sacrificed for extreme sensitivity, noise power can then be used to perform two-point load calibrations. Since load temperatures can be precisely determined, the receiver can be quickly and accurately characterized; minute changes in system gain can then be detected, and systematic errors corrected. In addition, using receiver pairs in a balanced approach to measuring X+, X-, Y+, Y-, reduces systematic offset errors from non-identical system gains, and changes in system performance. This paper describes and demonstrates a balanced BPM-style diagnostic receiver, employing Dicke-switching to establish and maintain real-time system calibration. Benefits of such a receiver include wide bandwidth, solid absolute accuracy, improved position accuracy, and phase-sensitive measurements. System description, static and dynamic modelling, and measurement data are presented.

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  • PAC09, 4-8 May 2009, Vancouver, BC, Canada

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  • Report No.: JLAB-ACE-09-975
  • Report No.: DOE/OR/23177-0735
  • Grant Number: AC05-06OR23177
  • Office of Scientific & Technical Information Report Number: 1021856
  • Archival Resource Key: ark:/67531/metadc833392

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  • May 1, 2009

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 6:44 p.m.

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John Musson, Trent Allison, Roger Flood, Jianxun Yan. Reduction of Systematic Errors in Diagnostic Receivers Through the Use of Balanced Dicke-Switching and Y-Factor Noise Calibrations, article, May 1, 2009; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc833392/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.