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so is it the boundary condition setting will affect the simulation results? And actually what is the function of setting the boundary condition?
Also, what are you solving for? Do you need to mesh anything first before solving?
On the whole i'm not so sure how to tune the mesh so that we will have the less number of mesh cell vs the most accurate results and less mesh cell will means that we will have shorter calculation time.
This antenna was resonant at 2.4GHz, now i was plan to shift the resonant frequency to 0.8GHz by scale the antenna to bigger size so that shift to lower frequency, and the results was not very good too, just able to get back half of the bandwidth and 10dB of return loss at low frequency. Any idea or suggestions on how to make the bandwidth become wider and also make the return loss become larger also.
Actually I've been doing a lot of antenna testing lately, myself. I've been doing a lot of calculations on attenuation by water on a signal. But I'm no expert!