NanoVNA-Saver

NanoVNA-Saver is an open-source project that has carved a niche within the amateur-radio and RF-engineering communities by supplying a single, cross-platform companion utility for the popular NanoVNA vector network analyzer. The program focuses on one core mission: pulling scattering-parameter sweeps from the palm-sized hardware via USB, plotting them in interactive Smith-chart, logarithmic, and time-domain views, and then archiving the measurements in standard Touchstone, CSV, or bitmap formats for later comparison or simulation import. Typical use cases include tuning broadband antennas by watching return-loss traces shift in real time, characterizing RF filters and amplifiers, verifying cable fault locations through TDR transformation, and documenting lab-grade reference data for hobby or commercial compliance. Because the interface exposes both single-scan and continuous-update modes, hams in the field can adjust antenna traps while instantly seeing VSWR minima, while microwave experimenters can concatenate multiple segments to achieve wideband coverage beyond the NanoVNA’s native sweep limit. Despite its narrow scope, the tool integrates calibration management, trace arithmetic, reference-overlay memories, and an export bridge to popular EM simulators, giving it surprising depth for a lightweight utility. NanoVNA-Saver software is available free of charge on get.nero.com, where downloads are delivered through trusted Windows package sources such as winget, always installing the latest upstream build and supporting batch installation alongside other applications.