Adsb Moxon Antenna

Most of the ADSB feeders / enthusiasts are not being able to put up antennas on the roof covering the whole 360 degree. But as a go to antenna, most of the time ground plane vertical antennas are being used at first and then co-linear coaxial antennas are being advised as an improvement over ground planes. If you have the ability to cover ~360 degrees, using these antennas is off course good for staying omni-directional. So this way you can get frames from all directions.

But many enthusiasts are actually using them sticking out from a window - a balcony or sometimes even indoors near to a window. On those cases moxon is a much better antenna alternative compared to those omni vertical antennas as:

- Closed loop type antennas get less noise (QRM) compared to vertical omni antennas which improves SNR and that means more decodes even without a filter and Lna. You can use more gain on the SDR without hurting the SNR.

- It has the gain directed mostly on the forward direction so