miniVNA: Miniature, PC based HF/VHF Antenna analyzer
The miniVNA is a tiny antenna analyser working from 0.1 to 180MHz. It is connected to a computer with just one USB cable, power is supplied over USB. An internal option for serial (RS-232) communications is available as well.

The miniVNA allows you to quickly analyze any antenna over a user defined frequency range between 0.1 and 180MHz. You see at a glance where the antenna is resonant, what the SWR is and what the return loss is. The best (minimal) SWR frequency is automatically found and displayed.

miniVNA board

Two markers can be freely placed within the shown frequency range and measure impedance [Z], resistance [R], phase [ω] and other values at these points.

Other functions of the mniVNA allows you to measure cable losses, cable length, transmission, bandwidth and quality of filters etc.

With its extremely small size, low power consumption and easy to use software interface the miniVNA offers a perfect device for HF/VHF measurements for the radio amateur. Whether at home in your shack or in the field during a fieldday or expedition. Size 90 x 85 x 25mm, ConnectorsS BNC.

Software is available for Windows™ and Linux™ operating systems.

A very special fun project is to use the mini-VNA together with a Bluetooth adaptor. Here the internal RS-232 serial interface is used. Both, the Bluetooth adaptor and the mini-VNA must be supplied with power from an external source (e.g. battery). The computer must have a Bluetooth interface. This enables remote measurements, for example right at the base of an antenna.

Screenshot Reflection mode measurement
(click to enlarge)

Screenshot Transmission mode measurement
(click to enlarge)

Technical specifications

• Frequency coverage 0.1MHz to 180MHz
• DDS Generator with 0 dBm output
• 2 BNC Ports allow Transmission Measurements e.g. filters, traps
• USB1.1 and USB2 compatibility
• RS232 optional socket for Pocket PCs or Remote Displays
• Fast Scan (typical 0.6 sec for 500 points)
• Use of an internal Industrial Directional Coupler
• High Reflection Dynamic Range 40dB to 35dB (VSWR 1.06:1 or better)
• Wide Transmission Dynamic Range > 50-55dB
• Measures VSWR, RL, Rs, Z +/-jx, Phase, Cable lenght, R/L/C
• Finds Minimum VSWR automatically
• New transparent box with LED indicators for the operation status
• In-Circuit-Programming for future firmware onboard CPU upgrades
• Operation from 3.6V Phone Batteries possible (current drawn <150mA)
• Software compatible with Windows and Linux operating systems.
• Save and Load of previous measurements
• Software for Pocket PC available

Included in shipment:

• mini-VNA
• USB Cable
• CD with Software
• Leaflet "Quick Installation Guide"