NanoVNA
Overview
The NanoVNA democratized antenna measurement — a $50–300 two-port vector network analyzer covering 50 kHz to 1.5 GHz (to 6 GHz on LiteVNA-64) that put real S-parameter measurement on every amateur bench at 50–100× below the price of the previous entry-level VNA. This dive covers the full hardware family (V2, SAA-2N, Hugen V3, LiteVNA, NanoVNA-F variants), calibration discipline (OSL + through, calibration kit quality as the dominant accuracy variable), S11/S21 measurement workflows (return loss, SWR, complex impedance, insertion loss, filter response), Smith-chart workflow on the device's touch screen, time-domain reflectometry for feedline-fault location, NanoVNA-Saver and host software, and the field workflow for measuring a deployed antenna on deployment day. Limitations (50–80 dB dynamic range vs 100+ dB for premium VNAs, absolute power accuracy, phase drift) are quantified explicitly.
Context
Every antenna and matching-network chapter in the series ends with "verify the build with a NanoVNA" — this is the measurement tool that closes every DIY build loop in the series. Before the NanoVNA landed in 2019, antenna measurement required either a $5k used HP 8753 or a dedicated commercial analyzer with less 2-port capability; the NanoVNA collapsed that barrier. The 50–80 dB dynamic range is adequate for all amateur antenna and BALUN/tuner work; the four cases where more is needed — deep stopband characterization below −60 dB, calibrated absolute power, sub-0.1° phase repeatability, NIST-traceable results — are the handoff triggers to the companion Analyzers & VNAs sub-project.
