The ZeenKo LibreVNA is a 2-port vector network analyzer delivered as open-source hardware, connected via USB to a PC for S-parameter measurement and RF circuit characterization. Operating from 100 kHz to 6 GHz with frequency accuracy of ±2 ppm, it delivers dynamic range exceeding 100 dB below 3 GHz and enables rapid multi-point sweeps—10,000 points in under 1 second. The instrument measures all four S-parameters (S11, S12, S21, S22) with configurable resolution, making it suitable for impedance matching, filter design, antenna analysis, and general RF/microwave circuit work. Its CNC-machined aluminum shielded enclosure houses dual SMA female test ports and integrates a programmable signal generator with selectable output power from −40 dBm to 0 dBm.
Technical Specifications
Frequency Range: 100 kHz to 6 GHz
Frequency Accuracy: ±2 ppm
Characteristic Impedance: 50 Ω
Test Ports: 2 × SMA female connectors
Measurement Parameters: S11, S12, S21, S22
Measurement Points: 2 to 4501 (configurable)
Measurement Bandwidth (IFBW): 10 Hz to 50 kHz
Resolution Bandwidth (RBW): 13 Hz to 112 kHz (spectrum analyzer mode)
Dynamic Range: >100 dB (≤3 GHz) | >95 dB (70 dB (100 kHz) | >50 dB (6 GHz)
Sweep Rate: >10,000 points in <1 second; 4000 points in <500 ms at IFBW=50 kHz
Output Power: −40 dBm to 0 dBm (adjustable; power may decrease below 1 MHz and above 3 GHz)
Phase Noise: −103 dBc/Hz (1 GHz, 10 kHz offset)
Port Isolation: 50 dB at 6 GHz
External Reference I/O: 10 MHz input/output; optional output selectable 10 MHz or 100 MHz (~+3 dBm)
– Key Features
• Open-source hardware design with PC-based processing via USB-C
• Integrated spectrum analyzer mode for two-channel measurements
• Integrated signal generator functionality
• CNC-machined aluminum shielding for EMI rejection
• Configurable sweep parameters and point density
• External 10 MHz reference support for frequency locking
– Typical Applications
• S-parameter characterization and circuit analysis
• Impedance matching and tuning
• Filter design and validation
• Antenna characterization
• Transmission line measurements
– Compatibility & Integration
Interface: USB-C (USB 2.0 Fullspeed); external power via 3.5 mm jack (5 V DC, 1.5 A, positive center)
Operating Systems: Windows, Linux, macOS (64-bit)
Physical Dimensions: 122 × 98 × 16 mm
Included Accessories: USB cables, 30 cm SMA male-to-male RF cables, SMA calibration kits (OPEN, SHORT, LOAD), SMA adapters
