Patent ID: 7948248

Claim:
A transmission line impedance compensation method, comprising the steps of: providing a measurement device that is adapted to source a test signal having a frequency to a device under test and to determine a corresponding impedance of the device under test using an auto-balanced bridge technique; connecting a first transmission line, a second transmission line, a third transmission line, and a fourth transmission line to said measurement device; connecting an end of the first transmission line to an end of the second transmission line; connecting an end of the third transmission line to an end of the fourth transmission line; measuring, by said measurement device, a combined phase delay of the connected first and second transmission lines; measuring, by said measurement device, a combined phase delay of the connected third and fourth transmission lines; connecting the device under test to the first transmission line, the second transmission line, the third transmission line, and the fourth transmission line after measuring the phase delay of the connected first and second transmission lines and the phase delay of the connected third and fourth transmission lines; and determining said corresponding impedance of the device under test based on both of the combined phase delay of the connected first and second transmission lines and the combined phase delay of the connected third and fourth transmission lines.