Rotating antennes in CST Studio

Hello!

I want to simulate a rotating antenna for a circular polarized signal. Especially the quality of the received signal depending on the speed of the rotation. Is this possible with the Microwave Studio or would another Studio be better?
How could i realize the rotation? Can I use the transform option or will it then just calculate the static results for an antenna in different orientations instead of a movement?

Thank you a lot!

Hi,
I am not sure to understand exactly your request.

Your antenna has circular polarization RH or LH ? or linear polarization.
Is a mechanical rotation and eletromagnetic field analysis ?

Otherwise, with CST MicroWave Studio, it will be possible !
You need to compute the farfield and in postprocessing, you can analyse for each position.
But, it will be necessary to do one simulation by orientation.

If this is a linear polarization antenna, you can use the Ludwig 3rd definition (slant), always in CST MicroWave Studio,
and it will be not necessary to do several simulations.

BR

Ah, ok, thank you zebroo. I should have used more time to describe the problem.

I want to receive a RHCP signal with a patchantenna. That antenna is placed on a rotating surface. The source of the RHCP signal is located some miles away, so I can use the farfield.
What I′m interested in, is the quality of the signal depending on the speed of the rotation. I just don't know how to simulate the speed of the rotation...

I don't think that you need to simulate speed of rotation.

The mechanical rotation speed is many orders of magnitude slower than the "phase rotation", so can't it be considered a static problem?

Ok, the problem is more clear.

I suppose that you know the axial ratio (or cross-polarization) of your patch antenna.
Then, you need know also the axial ratio of the transmit antenna and, the quality of the signal will depend only the combination
of the two signal. So, instead of use CST, you use the chart relation loss between Tx-axial ration and Rx-axial ratio : you will know
the best and poorer combinations of rotation.

BR

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