We left off in the previous post trying to figure out a slightly more rigorous approach, to connect together two antennas, resonating in adjacent frequencies. Let’s recall: The designer may (or may not) choose a point with higher impedance. This…
Tag: RF
Why Think If You Can Log? (Log Periodic Antennas, Pt. 1)
A tale of wearables and things I’ve had a love-hate relationship with flexible printed circuits (FPCs). On the one hand, terrible to manufacture, solder and maintain. On the other? They are so cool. Extremely tough for RF designs, due to…
How To Make A Bad Network Analyzer
Introduction Avast ye lab lubbers and radio farers! For reasons that will remain disclosed now, I have been getting into designing some measurement instruments. And what better one to talk about than the most coveted item for every radio engineer.…
FEM Failures, Finale. Featuring Dolphins And Whales!
The final chapter is upon us. But will a solution be found? Stay tuned, to find out more. We left off with a seemingly singular solution. Who knew, that the coaxial cable, of all… It should be the simplest one,…
Order, Please. (FEM Adventures Pt. 3)
One step closer to insanity, one step further in finite element computation.
(S)tay True, (S)tay Humble
Every once in a while, I learn that even if I think I knew a subjet to it’s fullest, there is something I missed. In this occasion, it’s scattering parameters, commonly known as S-Params. It’s not a “subject”, per-seh, barely…
How To Make A Cactus – Multi Band Antennas
In the previous post, I discussed the fact that an Antenna should be designed from its stem, namely, its feeding point. I wouldn’t go as far as to say it’s easier to design this way, but it’s definitely better. I…
A Finite Story About Differentials And Integrals
There are quite a few simulation tools available today. Various methodologies, various levels of GUI usability, but there is one thing in common. They are all really expensive. Ranting aside, it is useful to know how the different simulation techniques…
Building Bridges Pt. 3 – Time And Time Again
Yet another exciting episodes of issues simulating stuff in the time domain.
Building Bridges Pt. 2 – The Curse Of The Open Source
The adventure continues! Now with S-Parameters and pretty 3D drawings