I have an inductor wound on some 22mm plastic pipe, so essentially air-cored. It's over 120 turns, 700mm long and uses resistance wire. It's about 12uH.
There are 30 capacitors connected evenly along the coil commoned to a copper pipe busbar. It simulates a long, peculiar transmission line.
I want to LTspice it. OK, lots of small inductors with some resistance and the capacitors.
But these small inductors are coupled by virtue of being co-axial and adjacent and being part of a single larger inductor. A tapped inductor is surely a transformer, so how would I enumerate the coupling coefficients, or is this something which can be ignored?
I know I can use an LTRA, but that doesn't simulate the discrete nature of the capacitance, and I really want to simulate the simulated line.