Yatpac - The Ultimate Open Source TLM Simulation Package

The Patch Antenna

1. Example Description

In the following example, a patch antenna built on a 125 um Si substrate is simulated, Fig. 1.

Fig. 1: The geometry of the patch antenna.

2. TLM model

The patch structure, excitation-type and simulation setup are given in the TLM model files I3D.patch4.

The structure is excited with a Gaussian signal. The source type is a lumped voltage source at the input terminals. Absorbing boundary conditions are used at the boundaries of the simulation domain.

3. Simulation Results

3.1 Input Impedance

Having the knowledge of the voltage and current at the input terminals, we can compute the input impedance of the antenna and it is shown in Fig. 2.

Fig. 2: Input impedance of the patch antenna.

3.2 Electromagnetic Field Visualization

Having the knowledge of the voltage and current at the input terminals, we can compute the input impedance of the antenna and it is shown at Fig. 2. Also a snapshot of the field distribution is shown in Fig. 3.

Fig. 3: Visualization of the electric field intensity in the substrate.