Rohde & Schwarz has added new models and options to its ZNB vector network analyser family, addressing applications in the mmWave range such as 5G at FR2 frequencies and applications in aerospace and defence in the Ka band.

The R&S ZNB26 provides network analysis up to 26.5 GHz, and R&S ZNB43 extends the upper frequency of the midrange VNA family to 43.5 GHz.

The R&S ZNB43 combines simple operation with a measurement performance which combines speed and dynamic range with temperature stability. The R&S ZNB26 extends the maximum frequency to 26.5 GHz, and now the R&S ZNB43 adds a frequency range of 100 kHz to 43.5 GHz.

The R&S ZNB43 is available as 2 port or 4 port models, with two connector types, either 2.4 mm or 2.92 mm. It also offers optionally an extended power range and a second internal source. The ZNB43 is intended for characterization of passive devices such as filters, couplers, and switches. When equipped with the second internal source, it becomes a versatile instrument for measurements of active devices such as mixers and amplifiers.

Higher frequencies, faster clock rates, and more precise specifications all demand more accurate device characterization. For the higher microwave frequencies, de-embedding the test fixture from the device under test is increasingly important. While simple in principle, de-embedding is much more complicated, as the S-parameters for the fixture cannot easily be measured. Only in the past few years have practical de-embedding solutions come to the market.

For many Rohde & Schwarz network analysers including the R&S ZNB family, a range of industry-wide well accepted software tools for de-embedding in line with IEEE 370 are now available as fully integrated options.

With any network analyser, no matter how well a test setup has been calibrated, there will still be a residual measurement uncertainty which will vary according to settings such as the power level for the current test. Knowing the actual uncertainty under given test conditions is crucial. The R&S ZNB allows users to keep track of measurement uncertainty in real-time, with integrated software options.

The R&S ZNB family also supports inline calibration units which remain connected to the device under test throughout the test period. Inline calibration is essential for tests in a thermal chamber for example on satellites or satellite components. Or in multiport setups with large numbers of ports, where instead of a time-consuming reconnection of DUT cables, recalibration is reduced to just pressing a button on the R&S ZNB.