I finished up a quick pizza pan Planar Disk antenna based on WA5VJB’s guide. My dollar-store didn’t have anything larger than 13″ pans. So, with a Planar Disk that should give me a bottom range of about 227MHz, I was hoping. After getting great performance out of the PD at 70cm, I decided to do a heatmap at 2m to see if it could do anything there. I compared it with my N9TAX Slim Jim dual-band. Below is an image comparison slider of the two heatmaps, one from each atenna. The image on the left is the pizza pan based Planar Disk antenna I made for $2 and a scrap RP-SMA cable from a really low-quality cellphone antenna base that broke. Standalone images here and here. I’ll have to find something to compare it to, on the high end, to see how high it can go. If 1/16th inch separation gets you 1.3GHz, I should be higher than that ’cause it’s probably 1/32″ of a gap at the moment. UPDATE: Warning, images are large. Second this is how to do the heatmaps here. Read more “DIY Planar Disk Antenna”
Essentially, this is just so I have a place to post my crappy solutions to my crappy tech problems enabling search engines to provide them to you all… I’ll assume that’s why you’re here. Things I do, mostly… GNU/Linux in general, gentoo mostly. SBC’s, Odroid’s mostly. SDR’s, RTL-SDR.com V3’s, specifically. VOIP for a living, lots of Asterisk, OpenSIPS, and Grandstream equipment.
I’ve also been trying to get my hands on every cheap antenna I can and will eventually be providing some comparisons as well as information about what can be accomplished with cheaper antenna solutions in the sub-$20US range.