DIY 1-30 Mhz Graphic Antenna SWR Analyser
Posted: 24 Sep 2017, 00:06
Just wanted to show a project I completed a while ago.
Uses an AD9850 signal generator, 2 unobtanium expensive diodes, an arduino and a slew of miscelaneous passives.
I had it connected to this ****-o-rama mobile antenna on my balcony.
And this is the SWR curve it reported. Matches with the SWR I measured with my proper shortwave SWR meter. Was really happy with it.
And lastly, here is the curve it shows connected to a full-size ground-plane CB antenna!
Inspiration to build it, the schematic, and source code was found here: http://www.dg7eao.de/arduino/antennen-analysator/ (warning: GERMAN! )
In total, I spent about £10 on the signal generator, already had the arduino, spent £5 on the diodes (god above ), and another 5 on the rest of the passives from a local electronics shop. Pretty cheap overall, and works amazingly.
Uses an AD9850 signal generator, 2 unobtanium expensive diodes, an arduino and a slew of miscelaneous passives.
I had it connected to this ****-o-rama mobile antenna on my balcony.
And this is the SWR curve it reported. Matches with the SWR I measured with my proper shortwave SWR meter. Was really happy with it.
And lastly, here is the curve it shows connected to a full-size ground-plane CB antenna!
Inspiration to build it, the schematic, and source code was found here: http://www.dg7eao.de/arduino/antennen-analysator/ (warning: GERMAN! )
In total, I spent about £10 on the signal generator, already had the arduino, spent £5 on the diodes (god above ), and another 5 on the rest of the passives from a local electronics shop. Pretty cheap overall, and works amazingly.