Vector network analysis instrument A test device for electromagnetic wave energy.
Principle and use of vector network analyzer
The force is directly dependent on the dynamic range of the system. The phase fluctuation parameter is tested using the electronic delay (Electrical Delay) function of the vector network analyzer. Direct observation of the insertion phase shift is usually not very useful because the electrical length phase shift of the device exhibits a negative slope with respect to frequency (the longer the device, the greater the slope). Since the distortion is only caused by the deviation from the linear phase shift, it is desirable to remove the linear portion of the phase response. Using the electronic delay function of the network analyzer, the electrical length of the device under test can be offset, resulting in a deviation from the linear phase shift, ie phase fluctuation (distortion).
Introduction to the working principle of vector network analyzer
The vector network analyzer itself has a signal generator that can scan a frequency band. If it is a single port measurement, the excitation signal is applied to the port. By measuring the amplitude and phase of the reflected signal, you can The impedance or reflection is judged. For the two-port measurement, the transmission parameters can also be measured. Due to the obvious influence of the distributed parameters, the network analyzer must be calibrated before use.
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