![]() ![]() The NanoVNA is a small credit card sized VNA. The NanoVNA: A $50 Vector Network Analyzer All the listings we've seen seem to come with simple calibration kits as well. The open source NanoVNA project by and ttrftech has been around since 2016, but only recently have Chinese sellers begun mass producing the unit and selling them on sites like Aliexpress, eBay and now Amazon. We note that it seems that there are some sellers selling them without shielding, so it might be worth double checking the listing to see if they mention that. However, the cost of owning a VNA has now been reduced to only US$50 thanks to the NanoVNA. Until just recently, VNA's have cost roughly US$500 for a decent USB PC based unit like the miniVNA or PocketVNA, and have set people back thousands to tens of thousands of dollars for bench top units. Compared to a standard SWR or network analyzer a VNA supplies you with phase information as well. For example if you are building a QFH or ADS-B antenna to use with an RTL-SDR, a VNA can help ensure that your antenna is properly tuned to the correct frequency. It is a very useful tool to have if you are building and tuning home made antennas, filters or other RF circuits. ![]() It can also be used to characterize and tune filters.
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