Yatpac - The Ultimate Open Source TLM Simulation Package

Microstrip bend with Miter (1)

1. Example Description

In the following example bend Microstrip with miter structure is simulated. The characteristics of the structure are identical to 90 Degrees bend Microstrips of the examples Microstrip_bend and Microstrip_bend_LF but in this case the the edge of the bend is clipped at 45 Degrees, see Fig. 1-2

Fig. 1: The model of the bend Microstrip with the ground plane.

Fig. 2: The complete model of the bend Microstrip with the dielectric material.

2. TLM model

The bend miter Microstrip structure, excitation-type and simulation setup are given in the TLM model files I3D.dev.

The structure is excited with a Gaussian signal. In this case the time duration of the gaussian pulse is extremely short and the simulation bandwidth approximately 312GHz. The excitation is modelled by Templete (see documentation) which excites the field distribution of the fundamental mode. Absorbing boundary conditions are used at the boundaries of the simulation domain.

3. Simulation Results

3.1 Electromagnetic Field Visualization

Similarly to the case of the Microstrip, we display, in Fig. 3-4, snapshots of field distribution. Also in this case due to the very broadband excitation the effect of the numerical dispersion, already introduced in the example Plane wave lossless, is evident from the time domain signals, see Section 3.2.

Fig. 3: Snapshot of the of the electric filed distribution form the top view.

Fig. 4: Snapshot of the electric filed distribution from a top view.

3.2 Computed Time-Domain Signals

Also in this case as well as in the Mirostrip case, voltages signals are displayed at several different positions of the traveling Gaussian pulse.

Fig. 4: The time domain voltages signals.