Patent ID: 8558533

Claim:
A system for measuring a passive intermodulation signal, which is generated by a device under test in a high frequency band, comprising: a plurality of signal generation means for generating a plurality of test signals, each having different frequencies; signal separation means including a first terminal, used to input the plurality of test signals from the plurality of signal generation means, a second terminal, used to output the plurality of test signals received at the first terminal and to input the passive intermodulation signal, and a third terminal used to output only the passive intermodulation signal; a transmission line having two conductors, one end of which is connected to the second terminal of the signal separation means, and which provides an impedance mismatching condition between a device under test and the transmission line, and generates a standing wave of the plurality of test signals along the transmission line, while the device under test is located between the two conductors along the transmission line where the standing wave is generated, and at the other end of the transmission line; and passive intermodulation measurement means connected to the third terminal of the signal separation means to measure the passive intermodulation signal, wherein the other end of the transmission line is short-circuited by using the device under test; and passive intermodulation of the device under test, which is generated at a position of an anti-node of a current standing wave of the plurality of test signals is measured.