Thinkstar LibreVNA 100kHz-6GHz Vector Network Analyzer

Professional RF Analysis Tool

The LibreVNA is a USB-based full 2-port vector network analyzer designed by Jankae for engineers and RF hobbyists who need laboratory-grade S-parameter measurements up to 6 GHz. It connects directly to a host computer for control and data acquisition, making it suitable for antenna characterization, filter tuning, and cable testing in field or bench environments.

100 kHz to 6 GHz Measurement Range

The analyzer covers an ultra-wide frequency span from 100 kHz to 6 GHz with frequency accuracy better than 2 ppm. It captures over 10,000 sweep points in under one second using three simultaneous ADCs and FPGA processing. Dynamic range reaches 70 dB at 100 kHz, while port isolation is 50 dB at 6 GHz; above 3 GHz and below 1 MHz performance gradually decreases, and S12 isolation runs approximately 10 dB worse than S21 due to structural constraints.

Compact USB Instrument with External Reference

The device draws power and communicates over a single USB link, eliminating the need for an external power supply. Front-panel SMA connectors provide the two measurement ports, while dedicated external reference input and output sockets allow synchronization with a high-stability clock or distribution to other instruments. The 2021 upgraded hardware revision reflects ongoing open-source development, so users should expect occasional firmware updates and documented limitations rather than a frozen feature set.