SWLing Post Message Board

Hmmm... so to get down (or up) in frequency we'd have to change the loop size... not exactly easy/practical imHo It's not necessary to change the loop size. You simply need to increase the loading of the outer loop by increasing the lumped inductors, and increase the loading of the inner loop by ad...

spent a (short) bit of time playing with C1, C2 and RL but probably I'm missing something, I mean, I followed the directions in the comments, that is 1. Adjust C2 (outer loop capacitance) to be very large (e.g. 1000 pF), so that the outer loop is far away from resonance. 2. Use 4nec2 optimizer to a...

Thanks for the warm welcome. :) As for the CTL, I've played with it while designing the SULA Excellent to hear! Did you ever actually get around to building one? I have only simulated, but not yet actually built, the CTL. I'm still at a bit of a loss to understand exactly what is happening in the CT...

After seeing all the discussion and technical analyses of the very interesting SULA unidirectional small loop antenna, I thought I'd post a reference to another seemingly little-known, but rather mysterious and intriguing unidirectional small loop antenna: the Coplanar Twin Loop (CTL) antenna by the...