If your project contains an array of line objects, you can also define an array of '''Lumped Sources''' to be placed on those lines. If you insert a new lumped source, all line array objects, if any, will be listed in the Lumped Source dialog as eligible objects for lumped source placement. A lumped source will be placed on each element of the array. All the lumped sources will have identical direction and offset. However, you can prescribe certain amplitude and/or phase distribution among the array elements. The available '''Weight Distributions''' include '''Uniform''', '''Binomial''', '''Chebyshev''' and '''Data File'''. In the last case, you need to set a value for maximum side lobe level ('''SLL''') in dB. You can also define a '''Phase Progression''' in degrees along each of the three principal axes.
[[Image:{{isoimg|FDTD59.png|800px]]Â Figure 1: Defining lumped sources with a Chebyshev weight distribution on an array of line objects.}}
Just like lumped sources, you can place '''Lumped Loads''' on array of line objects. These loads can be resistors, capacitors, inductors or nonlinear diodes. If you insert a new lumped load, all line array objects, if any, will be listed in the Lumped Load dialog as eligible objects for lumped load placement. A lumped load will be placed on each element of the array. All the lumped load will have identical type, direction, offset and parameter values.
# HDMR
{{[[Image:FDTD57.png|thumb|250px|Figure 1: [[EM.Cube]]'s FDTD Simulation dialog.}}]]
Analysis is the simplest and most straightforward simulation mode of the [[FDTD Module]]. It runs the FDTD time marching loop once. At the end of the simulation, the time-domain field data are transformed into the frequency domain using a discrete Fourier transform (DFT). As a result, you can generate wideband frequency data from a single time-domain simulation run. The other simulation modes will be explained later in this manual.