S11 is a parameter of how well the power you put into an antenna stays there and doesn’t reflect back into you radio. With “stays there” one includes the amount of power radiated out into the air, as well as losses of the energy inside the antenna. With losses I mean energy converted into heat. With…

The big Antenna S11 catalog

jpmeijers February 20, 2019, 8:18am 13

The BIG and SMALL ANTENNA topic part 2 Hardware

Coincidentally I performed a similar exercise as jpmeijers original catalog, but for the 915MHz band. The apparent poor performance of off-the-shelf antennas caused quite a stir on LinkedIn. Here are the version one results, with the antenna mounted on the VNA just like jpmejiers did. I believe that’s a good indication of performance in most typical configurations, where you screw the antenna directly to the electronics enclosure. [00%20am] Here are the updated results with the antenna connec…

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