Designing a HF underwater antenna

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kaizmoto1489
Posts: 1
Joined: Wed 05 May 2021, 04:44

Designing a HF underwater antenna

Post by kaizmoto1489 » Wed 05 May 2021, 04:46

Hi everyone,
I am designing a HF underwater antenna for water-to-air transmission but I cannot find how to have water at most boundaries and air as one of the boundaries.
Is this supported?
Thanks in advance!!!

rml
Posts: 18
Joined: Fri 17 Aug 2012, 14:18

Re: Designing a HF underwater antenna

Post by rml » Sat 08 May 2021, 23:19

Hi,
this is actually not that difficult.
All six spatial directions of the simulation box may simply be assigned to MUR or better PML as boundary condition.
The lower part of the simulation box can then be completely filled with a cuboid using AddBox.
This must be assigned to a small priority and a previously defined material with the dielectric properties of water.
The antenna inside the water has to have a higher priority, of course.
For the mesh, please remember that the wavelength in water is much smaller than in air resp. vacuum.
Moreover, it is always helpful to try different tutorials, even if they are not about antennas.
Good luck!

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