The representative VNA block diagram (see Figure 1) shows the key elements of the analyzer. The RF source at the top provides the device-under-test (DUT) stimulus. A forward/reverse switch directs the RF energy to either DUT port. The test set uses directional couplers or bridges to pick off the forward and reverse waves traveling to and from each port, and down-converts these signals to four I...

This study treats the optimised one-port (reflection coefficient) and two-port (shunt-through/series-through) measurement methods for complex permeability determination of solid soft magnetic materials using a vector network analyzer (VNA) at frequencies from 9 kHz to 6.5 GHz. The principle of measurement methods, the relationships of measured phasor voltage ratio (Sparameter) to complex impeda...

This paper is devoted to a detailed experimentally based analysis of applicability vector network analyzers for measuring impedance surface mount inductors with and without DC bias. The measurements are made using custom-made bias tees test fixture an ordinary analyzer. main attention in the focused on measurement accuracy inductors. Measurement results obtained analyzer will also be compared t...

[1] A new method of absolute calibration of sky noise temperature using a three-position switched spectrometer, measurements of antenna and low noise amplifier impedance with a vector network analyzer, and ancillary measurements of the amplifier noise waves is described and compared with other methods of calibration. An initial test of the method has been made using brief observations from 55 t...