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Simulation of EM field in highly dispersive (aerosol-like) dielectric media

Hello,

I have the task to evaluate magnitude, phase of E-field as well as angular and delay variance of it after transmission through highly-dispersive media (see image as attached). Particle size - 50um - 2mm and density of the particles is variable. Shape of the particles is sphere or cube. Materials are water, quartz, organics ets. Distance between Tx-Rx is 0.1 - 1m. Antennas are horns with HPBW = 10-20 degs. Freq is more than 10GHz. What would be the best computational methods for modeling of the task? What would be the best way to built geometry of the task?

Thank you.

BR, Dimon

Task.png.59e1857cf696f8545f088a442066102c.png

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Altair Forum User

Hi @Dimon

How much higher than 10GHz do you need to perform the analysis? At 10GHz the larger particles are the same order of magnitude as the wavelength - it is difficult to estimate how well an equivalent / homogenised material representative will work and you might need to model the larger particles using Lua with some random distribution. What I would suggest is start with some simple comparisons with a plane wave and different approaches to modeling the particles to see what detail is necessary.

Dimon

Hi @Dimon

How much higher than 10GHz do you need to perform the analysis? At 10GHz the larger particles are the same order of magnitude as the wavelength - it is difficult to estimate how well an equivalent / homogenised material representative will work and you might need to model the larger particles using Lua with some random distribution. What I would suggest is start with some simple comparisons with a plane wave and different approaches to modeling the particles to see what detail is necessary.

Hello Peter,

Thank you for your answer. The frequency range is 15 - 70GHz. So it is much higher than 10GHz.

Altair Forum User

Ok then the size of the particles will definitely play a role. I would definitely look into using Lua to try create the random particle distributions.

The best method for solving the problem will depend on the separation distance between the horns.