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Circular polarization source in RF module.
Posted 1 feb 2010, 16:24 GMT-5 2 Replies
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Is there any way to specify a source of circular polarized wave in 3D Harmonic propagation analysis in RF module?
Thank you!
Thank you!
2 Replies Last Post 19 gen 2015, 10:09 GMT-5
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Posted:
1 decade ago
Yes, I believe there are a number of ways.
The first that comes to mind is to specify two linearly-polarized orthogonal E fields tangential to an aperture, but the second with a 90 degreee phase shift relative to the first [simply multiply by j, or exp(j*pi/2) ]. If you are specifying the fields on an aperture on or within the model, just enter the fields using the boundary conditions there.
Similarly, if using the scattered field formulation, use the Application Scalar Variables dialog box (under the Physics menu item, Scalar variables). As just one example, you could set E0ix_rfw = exp(-j*k0_rfw*z) (which is already its default) and then also E0iy_rfw = j*exp(-j*k0_rfw*z) . This would necessarily yield a circularly-polarized wave, which in this example would be traveling along the z direction.
The first that comes to mind is to specify two linearly-polarized orthogonal E fields tangential to an aperture, but the second with a 90 degreee phase shift relative to the first [simply multiply by j, or exp(j*pi/2) ]. If you are specifying the fields on an aperture on or within the model, just enter the fields using the boundary conditions there.
Similarly, if using the scattered field formulation, use the Application Scalar Variables dialog box (under the Physics menu item, Scalar variables). As just one example, you could set E0ix_rfw = exp(-j*k0_rfw*z) (which is already its default) and then also E0iy_rfw = j*exp(-j*k0_rfw*z) . This would necessarily yield a circularly-polarized wave, which in this example would be traveling along the z direction.
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Posted:
10 years ago
Thanks Robert. your suggestion on circular polarization made my job easy. It is working fine to me.