miniVNA - HF & VHF Antenna Analyzer
Miniature Antenna Analyser Covering 0.1 to 180 MHz
Also measure cable losses, cable length, transmission, bandwidth, and quality of filters, etc.
Connects to computer with an USB cable, power is supplied over USB!

Why waste your money on a MFJ, Autek, etc. antenna analyzer
that shows only measurements at a single frequency?
Now view in real-time all parmeters
over any portion of the 0.1 to 180 MHz spectrum!

Chick here to see end view showing the USB connector. Click here to view an enlaged view of this typical display.

Software-Defined, PC-based HF/VHF Antenna Analyzer

miniVNA Antenna Analyzer $39899
Includes minVNA, USB Cable, CD with Software, & Quick Installation Guide
( No computer is included.)

miniVNA is also available from W4RT Electronics Dealers
Amateur Electronic Supply (www.aesham.com) and GigaParts (www.gigaparts.com)
************************************************************************
Handy BNC to SO-239 converter since most HF transmission lines use the PL-259.

 
BNC Male to SO-239 (female) Converter $5

************************************************************************
W4RT Electronics is the North American Distributor for the mini Radio Solutions miniVNA.
Non-North American customers should contact WiMo in Germany.
************************************************************************

Included in Package:

    miniVNA USB cable

    Quick Start Manual, Software, Instructions, & Data

The miniVNA is a full-featured, yet tiny antenna analyser covering 0.1 to 180 MHz. It is connected to a computer with just one USB cable, power is supplied over USB. An internal setting 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 180 MHz. In real time, you can see at a glance where the antenna is resonant, and the SWR, return loss, impedance, phase, etc. as a function of frequency. The best (minimal) SWR frequency is automatically found and displayed.

Click Here to Read miniVNA Manual.

 miniVNA board High-quality SMT fabrication to CE standards.

Two markers can be freely placed within the shown frequency range and measure impedance [Z], resistance [R], phase [f] 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 it's 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 field day or expedition. Size 90 x 85 x 25mm, Connectors S BNC.

Software is available for Windows™ and Linux™ operating systems.
Check here to read the software manual.

Smith Charts

Zplots is a free Excel application by AC6LA that allows you to plot impedance and related data obtained from the miniVNA. You can plot on both an XY chart and a Smith chart as well as view the data in tabular format. Lots of added capability! Click here for more information and to download Zplots.

Wireless Remote Operation of miniVNA

It is possible to use the miniVNA together with a Bluetooth adaptor, using the miniVNA's internal RS-232 serial interface. Both the Bluetooth adaptor and the miniVNA must be supplied, in this case, 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.

Example Test of W4WB's GAP Titan Antenna

It had been a while since I used the trusty old GAP Titan vertical antenna. Although I generally don't use my LDG autotuner with this antenna on bands other than 80 and 40 m, I noticed that 17 m was acting a bit odd. Figured this was a good time to use the miniVNA to examine this antenna system.

I first set the frequency sweep range to cover 3-33 MHz and to just plot out the SWR. Ouch! SWR in the 17 m band was almost 3:1, which means I had to fix my antenna. Since all of the other bands looked normal, this gave me a good clue where the problem was likely located.

I next changed the frequency sweep to cover 6-8 MHz so I could look more carefully at the antenna's 40 m performance. The markers were set just below the SWR = 2:1 values and the "BW and Q" box was checked. The minimum SWR was automatically located and displayed ("MIN SWR boxes were checked). The bandwidth was found to be about 165 kHz, but the min SWR is located at 7.00 MHz. This might at first look like a bad tuning of the antenna, but it is actually what I like since I use it for CW mostly and primarily in the DX portion, which is located from about 7.000 to 7.020 MHz. For phone portion of 40 m, I use the autotuner to achieve a good match.

The 20-m performance is clearly just fine. The frequency sweep to covers 10-15 MHz. I could have also checked the HF box and the various HF bands pop up. Selection of a band is as easy as checking a box.

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 PC`s 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 previous measurements

  • Software for Pocket PC available