olzphotos.blogg.se - What is fdtd

The source can be defined by any function of time. If a source cannot be described by a continuous wave or a Gaussian pulse one can define a custom excitation.

fc : 20dB cutoff frequency -> bandwidth is 2*fc.

It is defined by its its center frequency and the cutoff frequency. A Gaussian excitation is a sinusoidal wave with a Gaussian envelope function.

FDTD: the original FDTD object of the simulationĪ Gaussian type excitation is needed when simulating the response to a light pulse or the steady state response to a range of frequencies.

The temporal properties of the sources are stored in the FDTD object.įor simulations where a continuous wave is required, a sinusoidal excitation is the method of choice which is simply defined by its frequency. 3.1 Setting the weighting function of an excitation.

2.2.2 Total-field/scattered-field excitation.