Four pole analysis method with high bandwidth for frequencies to 50 GHz

摘要

The measuring method for four pole analysis with high band width, with which the object being measured (DUT) is controlled with a pulse shaped test signal. A band width reduced signal is formed, from the output signal of the object (DUT). The band with redn. happened by the superimposition with a pulse signal. For the superimposition, the pulse signal called up has a relatively small, constant frequency difference to the test signal. A low pass filter is integrated in the front of or behind the object (DUT), and at the output of the mixer (34), a low pass filter or a band pass filter is integrated. The band width reduced signal is digitalised, and for evaluation is subjected to a Fourier transformation.