Antenna Analyzers & VNAs
Overview
This dive covers the full instrument spectrum from legacy single-port antenna analyzers to professional-grade two-port vector network analyzers: the RigExpert AA-series (AA-35/55/230/600 Zoom, AA-2000 Zoom — the polish-and-ergonomics case for commercial analyzers post-NanoVNA), the MFJ-259/269 legacy classics, the Sark-110 transitional pocket VNA, the Comet CAA-500, and the full-instrument VNA tier (Keysight FieldFox handhelds, E5063A/E5071C benchtop, R&S ZNL-3, Copper Mountain S-series, and the HP 8753-family that anchors the used-VNA market). The four capability gaps that force a step up from NanoVNA class are quantified: deep stopband below −60 dB, calibrated absolute power, sub-0.1° phase repeatability, and NIST-traceable results. Cal-kit cost vs instrument cost is analyzed.
Context
For 80% of antenna and matching-network work, a NanoVNA-H V3 plus a quality cal kit is fully sufficient and outperforms a $400 MFJ-259D on every measurement that has phase information. The remaining 20% — filter characterization in the deep stopband, compliance testing requiring NIST traceability, group-delay measurements with picosecond accuracy, and stable performance over wide temperature swings — is where $3k–$50k on commercial instrumentation stops looking absurd. The NanoVNA has reshaped the competitive landscape for the sub-$1k analyzer tier; this dive draws the category line precisely and covers both the surviving amateur-analyzer market and the bench-VNA market where R&S, Keysight, and Copper Mountain define the performance ceiling.
