Method for calibrating a test rig
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United States of America Patent
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Mar 20, 2018
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app pub date -
Aug 25, 2014
filing date -
Aug 26, 2013
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Abstract
A method for calibrating a test apparatus, having a first and a second directional coupler, for gauging a two-port test object that has a first port and a second port in a calibration plane, wherein for the purpose of calibrating the test apparatus a vectorial network analyzer having a 1st-6th test port is connected to the first and second ports in the calibration plane such that the first and second test ports are connected to respective port in the calibration plane, the third and fourth test ports are connected to the first directional coupler and the fifth and sixth test ports are connected to the second directional coupler via a respective waveguide for electromagnetic waves. For different calibration standards, scatter parameters are determined for each desired frequency point. For the different calibration standards, corrections to the scatter matrix are made in order to obtain a corrected scatter matrix. The scatter parameters of the corrected scatter matrix are used to determine terms for error matrices.
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