![]() ![]() Both disadvantages do not appear when exciting with a gaussian pulse. It has however the disadvantage, that the energy is not decaying (time signal never stops) as well as that the frequency data such as S-Parameters has some "undefined frequencies" due to zero-amplitudes in the excitation spectrum. The template automatically recognizes the signal type and switches between the different TDR calculation methods 1) and 2):Ī rising rectangular pulse as excitation signal is the typical pulse for TDR evaluation. The TDR can be calculated with two kind of excitations: 1) step time signal or 2) Gaussian time signal. CST MWS with its transient solver is ideally suited for this task, since TDR pulses have to be short in time (to be able to resolve discontinuities in space) and thus extremely broadband. Typically TDR is applied to TEM structures such as connectors or IC packages designed to have minimum return loss. TDR computation (Time Domain Reflection) is well known from measurement, where TDR is the only possibility to ”look into a structure” and locate mismatches. This template evaluates the impedance profile along a TEM or similar structure based on the reflected time signals at a port (mode). ![]() Post Processing: Result Templates Template Based Post Processing Time Signals ![]()
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