For closewound coils, with length to diameter ratios around 5:1, a series of fairly careful measurements have been made with the coils arranged vertically above a ground plane, fed at the base, with
Loading coils are not isolated lumped elements and cannot be modeled as such. A lumped model serves as a decent design tool to determine a starting point, which will have to be further iterated empir
I don't know that Method of Moments codes (i.e. NEC) adequately model parasitic capacitance effects, which are proabably important in loading coils). No question that using a GH (helix) to model the
Phase Shift? This thread would have made me cross-eyed if I had studied it so I have not been following it. Nevertheless this excerpt caught my eye: I like to use AO/YO to design yagis, but I needed
An admirable construction approach. Your limited size elements are also not so much shorter than full sized elements that the mutual coupling between them is pretty much the same as the modeling tool