The NanoVNA is a tiny, self contained, portable, but low cost Vector Network Analyzer. It features a touch screen and built in lithium rechargeable battery.
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| NanoVNA with included accessories (minus SMA to UHF adapter). |
Of interest to the radio operator is being able to measure
reflected power and calculate the Standing Wave Ratio (SWR) over a
frequency range. The NanoVNA automates this resulting in an
easy-to-interpret graphical summary of antenna radiation efficiency vs.
frequency.
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| Hooked up to the Firestik 2MCKB 2m antenna. |
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| Triangle "1" at 143.400 MHz showing 1.05 SWR. Should work well on the 2m band 144-148 MHz. This information is crucial for effective antenna building
or diagnosing and many antennas can be adjusted to improve SWR around a
desired frequency. |
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