I’ve chosen three antennas for range testing and compared their RSSI at a fixed distance and a frequency of 923 MHz. Oddly, the longest 8 dBi antenna shows a lower RSSI than both the 10 dBi (mid-length) and the 3 dBi (short) antennas.
Has anyone seen this before, or might the 8 dBi antenna simply be incompatible with my setup?
| Gain (dBi) | RSSI (dBm) |
|---|---|
| 3 (short) | –95 |
| 10 (mid) | –90 |
| 8 (long) | –110 |
All the time. Antenna quality varies more dramatically than the different M shaped golden arched burgers in my area for something that apparently has a standards manual. Price is rarely an indicator. The manufacturer’s reputation is the most important thing - which means you can’t really buy from AliExpress or no-name brands from Amazon.
Testing, as you’ve done, is the real world acid test. Here’s how Stuart of $50 satellite fame does it: https://github.com/StuartsProjects/AntennaTesting
I see, I always though the higher dbi and the bigger the size the better the performance:upside_down_face:
Size isn’t everything, particularly if you want to stay legal.
Just because it’s bigger doesn’t mean it’s well made either.
