Evaluation of Electromagnetic Modeling Tools, May 2007
Can we use the "wire model" feature to represent the dipole? Modeling the Center-Driven Dipole with Microstripes Modeling the dipole as a "wire" rather than as a "cylinder" greatly improved the simulation time. The wire model is shown in Figure 4. A wire port is applied in the middle of the wire to produce the voltage source. The results are shown in Figures 5 - 7. Two successive peaks near the resonant frequency were obtained when the default settings were used (except the extent was set to 40%), as shown in Figure 5. When the maximum cell size was set to default/4, and the minimum cell size was maximum/40, the results shown in Figure 6 were obtained. The resonant frequency is 147 MHz, the impedance at 150 MHz is 76.6+j24.1 ohms. The simulation time was only 5 minutes. The comparison of the results between the cylinder model and wire model with finer mesh settings is shown in Figure 7. |