I love how this article starts out, the age-old saying about RF and analog being taboo… so true! Anyhoo, Colin takes you on a quick rundown of antenna basics, focusing on tuning PCB antennas. This is one of those articles you see AFTER you need it, personally I totally could have used this months ago. So we’ve all seen these PCB antennas, those little squiggly lines on your board that do the voodoo RF magic, but what do you do when you need to tune it ? Well start by reading this article.
With the recent boom of cheap SDR’s flooding the market, more people are getting back into RF design. Although I wouldn’t recommend using a fixed-tune antenna for a SDR, the theory by its self is worth the read. Of course the biggest hurdle here for a DIY’er is going to be having access to a spectrum analyzer.