NanoVNA-H4 Vector Network Analyzer 50 kHz–1.5 GHz with 4-Inch Display

A vector network analyzer measures the complete scattering matrix of any two-port RF network — the same S-parameter analysis CERN engineers use on accelerator RF cavities, now in a 100 g handheld.

A VNA works by injecting a swept-frequency signal at port 1 and measuring both the reflected power (S11) and transmitted power (S21) with phase-coherent receivers. From S11 you extract impedance, return loss, and VSWR — essential for antenna matching. From S21 you get insertion loss, group delay, and filter response. The NanoVNA-H4 implements this using a Si5351 clock generator for RF synthesis and two AD8302 gain/phase detectors for magnitude-and-phase measurement — 100,000× cheaper than a Keysight lab VNA at 1% of the measurement capability loss.

• Frequency range: 50 kHz–1.5 GHz; 4-inch 480×320 IPS touchscreen display
• Measures: S11, S21, Smith chart, polar, log magnitude, phase, group delay
• 50 Ω SMA ports; 101-point sweep; USB-C rechargeable 950 mAh battery
• Includes: calibration kit (OSL), two SMA cables, carrying case

Every purchase directly funds independent physics research at the Golden Physics Project.