![]() ![]() 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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