Patent ID: 6456092
Filing Date: 2002-09-24
Classification: G01R,H03L

Abstract:
A vector network analyzer for the microwave range of an output of a power supply having an output and an input comprising: a first millimeter wave oscillator in the form of a transit time tube with a transmitter arrangement,a millimeter wave receiver with a decoupling structure and a first device for the downward mixing of a received signal decoupled from an output of a power supply DUT (device under test) to be examined, a second device for the downward mixing of the part of the transmitted signal which was decoupled by said decoupling structure and directed to and input of the DUT, at least one additional microwave oscillator for the downward mixing of the transmitted and received signal, an additional reference oscillator with predetermined frequency which serves as a phase reference, a high frequency vector receiver serving as indicating device and equipment coupled thereto for the representation of the DUT disposed for examination between the transmitting and receiving devices, with a first power supply which has a controllable output voltage for the generation of the acceleration voltage for the first millimeter wave oscillator arranged in series with a controllable second power supply which is independent of the acceleration voltage, said second power supply having a control input which is independent of the acceleration voltage, a frequency discriminator connected to said control input and having an output connected to the control input of said second power supply and an input to which the reference signal of said reference oscillator is connected, and another input to which the output of said transmission side second device for the downward mixing is connected, said downwardly mixed transmission signal having the same frequency as the reference signal.