Yatpac - The Ultimate Open Source TLM Simulation Package

Curved Microstrip Line (1)

1. Example Description

This example is a curved Microstrip over a circular arc. The curvature of the Microstrip coverers a complete quadrant (90 degrees), Fig. 1-2. The characteristics of the structure are identical to 90 Degrees bend Microstrips of the examples Microstrip_bend and Microstrip_bend_LF.

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

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

2. TLM model

The curved 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 modeled 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

The visualization sequence, Fig. 3-4, is similar to the example Microstrip_bend. Form the time domain signals we may see the effect of the numerical dispersion, see Section 3.2

Fig. 3: Snapshot of the field distribution with isosurface.

3.2 Computed Time-Domain Signals

Time domain voltage signals at several different positions of the traveling Gaussian pulse are displayed in Fig. 4.

Fig. 4: Time domain voltages signals.