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Different positions different peak value
Posted 15.01.2012, 09:24 GMT-5 RF & Microwave Engineering Version 4.2 1 Reply
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I was about the simulate a sensor application.
It is a simple case. It only contains a sphere and a block. I put the sphere as the environment and the block as a chip antenna.
The material of both are air.
The problem is, when I put the block at (0,0,0), the peak electric field would be about 30, but when I put the block at (0,0,0.25), the peak electric field declines heavily, and even worse when the block is placeD at (0,0,0.5). But I think the peak value should not change when I change the position of the block. There are no other parameters to affect this result.
I hope someone could help. Thanks.
It is a simple case. It only contains a sphere and a block. I put the sphere as the environment and the block as a chip antenna.
The material of both are air.
The problem is, when I put the block at (0,0,0), the peak electric field would be about 30, but when I put the block at (0,0,0.25), the peak electric field declines heavily, and even worse when the block is placeD at (0,0,0.5). But I think the peak value should not change when I change the position of the block. There are no other parameters to affect this result.
I hope someone could help. Thanks.
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1 Reply Last Post 06.02.2012, 22:11 GMT-5
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Posted:
1 decade ago
Zimu,
Some initial thoughts:
1. Your mesh is much too coarse to resolve the wavelengths at your specified frequency. Thus, large numerical errors or failure to converge will result.
2. I don't believe you have set up your PML correctly either. But to keep things simple, you might want to specify a simple scattering boundary condition on the spherical surface, for now.
Try addressing those issues and see if it helps.
Some initial thoughts:
1. Your mesh is much too coarse to resolve the wavelengths at your specified frequency. Thus, large numerical errors or failure to converge will result.
2. I don't believe you have set up your PML correctly either. But to keep things simple, you might want to specify a simple scattering boundary condition on the spherical surface, for now.
Try addressing those issues and see if it helps.