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VNAs increase frequency range to 20 GHz

November 5, 2021 By Martin Rowe

Rohde & Schwarz extends upper frequency ranges on its ZNL and ZNLE vector network analyzers, expanding their upper-end frequency to 20 GHz.

Rohde & Schwarz VNAFour Rhode & Schwarz ZNL and ZNLE vector network analyzers operate at frequencies up to 20 GHz. The economy VNAs now have the frequency range needed to measure third harmonics for 5 GHz and 6 GHz band technologies, such as wireless LAN or mobile radio. The latest firmware release also includes an option that provides lower frequency ZNL models with an internal CW signal generator.

The ZNL models support two-port network analysis for a complete set of component S-parameters from 5 kHz to 14 GHz and 5 kHz to 20 GHz. The ZNLE models support two-port network analysis for a complete set of S-parameters from 100 kHz to 14 GHz and 100 kHz to 18 GHz (20 GHz in overrange).

The instruments are intended for the education, service lab, production, and automated testing markets where a balanced price/performance ratio, a small size factor and ease-of-use are top priorities. Together with the time-domain and distance-to-fault analysis options available in the lower frequency models, the four models are ideal for signal and power integrity applications as well as cable and filter testing.

Most 5G FR1 applications use frequencies between 3 GHz and 5 GHz. Wi-Fi6 (802.11ax) uses 2.4 GHz, 5 GHz, and 6 GHz when used as Wi-Fi 6e. Debug trials in the design stage need to include the third harmonic, or frequencies up to 18 and 20 GHz. The Rohde & Schwarz instruments in the R&S ZNL/ZNLE family help meet the increasing demand for network analysis at these microwave frequencies and have an attractive price.

The ZNL comes with an optional battery pack for field use. Users just push a button to switch on the instrument and start measuring. No external monitors, notebooks or additional software installations are needed.

The ZNL vector network analyzer can perform radiated emission measurements that include scans of up to 20 GHz in the time domain to measure voltage standing wave ratios. The ZNL14 and ZNLE14 cover all frequencies in the X band for commercial ground-based and airborne weather monitoring, air traffic control, military satellite transmissions, positioning and target identification.

The ZNL20 and ZNLE18 also support applications measuring in the lower K band (Ku), such as satellite point-to-point communications for GNSS systems, television satellite broadcasts and backhaul links.

The ZNL-K14 option is included in the new 1.41 firmware release, expanding the ZNL3, R&S ZNL4 and ZNL6 functions with an internal CW signal generator for DUT stimulation using a continuous wave signal from port 1, while the frequency spectrum is analyzed at port 2. The R&S ZNLx‑B1 spectrum analysis option is required for this function.

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Filed Under: 5G, Applications, Telecommunications Tagged With: rohdeschwarz

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