Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Distributive type parameters
Reexamination Certificate
2006-06-27
2006-06-27
Nguyen, Vincent Q. (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Distributive type parameters
C324S612000
Reexamination Certificate
active
07068049
ABSTRACT:
A method of measuring a DUT provides a vector network analyzer with at least two measurement ports and measures characteristics of thru, reflect, and line calibration standards at the measurement ports. Error coefficients are calculated as well as a shifted electrical length attributable to the measured calibration standards. S-parameters of the DUT are measured and corrected based upon the error coefficients. A reference plane is shifted for each element of the corrected S-parameter matrix to a measurement reference plane, andΓSA_portnΓLA_portm=S21_thru_nmS12_thru_nmwherein S21—thru—nmis equal to S12—thru—mnand an argument of both solutions for S21—thru—nmis fit to a straight line, the solution having a y-intercept closest to zero being a correct solution and a resulting argument of the correct solution being the electrical delay.
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Agilent Technologie,s Inc.
Bouscaren June L.
Natalini Jeff
Nguyen Vincent Q.
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