A High Speed, High Accuracy Position Indicator

Author: Steve Nichols
Publication: AMTA 1984
Copyright Owner: NSI-MI Technologies

One of the variables to be quantified when making antenna measurements is position. Without accurate and timely position information, the spatially dependent data cannot be correctly interpreted.

Scientific-Atlanta’s 1885 Positioner Indicator and 1886 Position Data Processor offer several improvements in providing position information which can enhance an antenna measurement system. New position indicating techniques have been implemented to allow a higher degree of accuracy and speed than previously attainable. These have been combined with advanced features for automatic system flexibility to create a high performance instrument for many applications. This paper describes the capabilities of these two instruments and how they can be used to improve system performance.

 

Polarization Correction of Spherical Near-Field Data

Author: John R. Jones, Doren W. Hess
Publication: AMTA 1984
Copyright Owner: NSI-MI Technologies

This paper describes the relationship of probe polarization correction to probe­pattern corrected and non-probe-pattern-corrected spherical near-field measurements. A method for reducing three-antenna polarization data to a form useful for polarization correction is presented. The results of three-antenna measurements and the effects of polarization correction on spherical near-field measurements are presented.

 

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