LibreVNA 2.0 100kHz–6GHz USB Vector Network Analyzer Full 2‑Port VNA with Calibration Kit
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The LibreVNA 2.0 Upgraded Version is a USB-based full 2-port vector network analyzer covering 100kHz to 6GHz, designed by Jankae for serious RF development, antenna tuning, and lab-grade measurements in a compact form. Using three simultaneous ADC channels and FPGA signal processing, it can capture over 10,000 dual-port points in under one second, providing fast, high-resolution S-parameter sweeps on your PC.
With an ultra-low-noise power design, 16‑bit ADCs, and a precision CNC aluminum shielded enclosure, LibreVNA 2.0 achieves an effective dynamic range of up to 95dB to 3GHz and usable performance to 6GHz. It measures full S11, S21, S12, S22 parameters and supports calibration for accurate characterization of filters, amplifiers, antennas, cables, and matching networks. Despite its compact size, many aspects are comparable to benchtop VNAs, making it an excellent tool for RF labs, field engineers, and advanced hobbyists.
Key Features
- Wide frequency range: 100kHz – 6GHz with < 2ppm frequency accuracy
- Full 2‑port VNA: Measures S11, S21, S12, S22 with 50Ω SMA female ports
- High dynamic range: > 95dB to 3GHz, > 50dB to 6GHz (IFBW 10Hz)
- Fast sweeps: 2‑port, 4000 points in < 500ms (IFBW 50kHz)
- Measurement bandwidths: 10Hz – 50kHz, 2–4501 points per sweep
- Output power: adjustable from −40dBm to 0dBm (note performance roll-off <1MHz and >3GHz)
- Interfaces: USB‑C, external 10MHz reference in, 10MHz/100MHz reference out
- Cross‑platform software: 64‑bit applications for Windows, Linux, and macOS
- Extra modes: basic 2‑channel spectrum analyzer and signal generator (for simple measurements when no dedicated SA/SG is available)
Performance Notes
- Due to structural limits, S12 isolation is about 10dB worse than S21.
- Above 3GHz, performance gradually decreases; port isolation is about 50dB at 6GHz.
- Below 1MHz, dynamic range drops; effective dynamic range is about 70dB at 100kHz.
- Higher-accuracy calibration standards improve measurement precision.
Specifications
| Impedance | 50 Ω |
| Test ports | 2 × SMA female |
| Frequency range | 100kHz – 6GHz |
| Frequency accuracy | < 2ppm |
| Measurement points | 2 – 4501 |
| 2‑port speed (4000pts) | < 500ms (IFBW 50kHz) |
| Measurement bandwidths | 10Hz – 50kHz |
| Dynamic range | > 95dB to 3GHz; > 50dB to 6GHz (IFBW 10Hz) |
| Reflection directivity | > 40dB after calibration |
| RF output power | −40dBm to 0dBm |
| Power supply | 5V DC, 1.5A (USB or 3.5mm jack), ≈7W |
| Interface | USB Type‑C |
| External reference in | 10MHz, SMA female |
| External reference out | 10MHz or 100MHz, SMA female |
Package Contents
- 1 × LibreVNA 2.0 Vector Network Analyzer
- 1 × USB Type‑C data cable
- 1 × USB power cable
- 2 × 30cm SMA male–male SS405 RF cables
- 1 × SMA male OPEN calibration standard
- 1 × SMA male SHORT calibration standard
- 2 × SMA male LOAD calibration standards
- 2 × SMA female–female adapters
- 2 × SMA male–male adapters
- 1 × English user manual
If you need a compact but powerful USB VNA for antenna tuning, filter design, cable testing, or RF module characterization up to 6GHz, the LibreVNA 2.0 offers an excellent balance between performance, portability, and price—backed by an active open-source ecosystem and frequent firmware improvements.
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