Changing ltspice export from cortesian to voltage values when using AC anlysis
Maybe this is not what OP's after (and I misunderstood?), but it looks like he needs to add .option meascplxfmt=cartesian to the LTspice schematic prior to simulation. See the help for LTspice &gt; Dot Commands &gt; .options and look at MEASCPLXFMT for details. It allows three keywords: bode, cartesian, polar.