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    How to understand floquet port in HFSS?

    Hi everyone,

    My model have one floquet port with TE and TM mode. When I finish work and see S parameter, it's easy to understand s(floquetport1:1,floquetport1:1) and s(floquetport1:2,floquetport1:2).
    but what s(floquetport1:2,floquetport1:1) and s(floquetport1:1,floquetport1:2) means. s(floquetport1:1,floquetport1:1) just stands for te mode? both te incident and reflect?
    If so, how can I get power reflection parameter? How can I get from S parameter mentioned above?

    Thanks.
    Casey

    •   Alt4th March 2011, 08:36

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  2. #2
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    Re: How to understand floquet port in HFSS?

    If there's something hard to understand, please feel free to let me know.
    Your help will be highly appreciate. Thanks.


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    Re: How to understand floquet port in HFSS?

    Hi everyone,

    understanding the problem floquet port in HFSS is not measured directly but can use the media parameter settings (s) see and check directly it will be directly visible.




    •   Alt6th March 2011, 18:00

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  4. #4
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    Re: How to understand floquet port in HFSS?

    Thanks but I am not quite understanding. Would you please explain more directly? thanks.



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    Re: How to understand floquet port in HFSS?

    Quote Originally Posted by namecasey View Post
    Hi everyone,

    My model have one floquet port with TE and TM mode. When I finish work and see S parameter, it's easy to understand s(floquetport1:1,floquetport1:1) and s(floquetport1:2,floquetport1:2).
    but what s(floquetport1:2,floquetport1:1) and s(floquetport1:1,floquetport1:2) means. s(floquetport1:1,floquetport1:1) just stands for te mode? both te incident and reflect?
    If so, how can I get power reflection parameter? How can I get from S parameter mentioned above?

    Thanks.
    Casey
    When you simulate modes in a floquet port, HFSS returns every possible result. Meaning if somehow your device takes TE and turns it into a TM mode, HFSS will account for that in the results.
    If your device only functions with a TE mode and the result is a TE mode you would only see a response in S(1:1,1:1) 1 being TE and S(1:2:,1:1) 2 being TM should be zero.

    Hope this helped.


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    •   Alt10th March 2011, 17:04

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  6. #6
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    Re: How to understand floquet port in HFSS?

    Quote Originally Posted by tekz View Post
    When you simulate modes in a floquet port, HFSS returns every possible result. Meaning if somehow your device takes TE and turns it into a TM mode, HFSS will account for that in the results.
    If your device only functions with a TE mode and the result is a TE mode you would only see a response in S(1:1,1:1) 1 being TE and S(1:2:,1:1) 2 being TM should be zero.

    Hope this helped.
    Actually, my model has a large S(1:2:,1:1). I thought it has no meaning to the model, but it seems it stands for the reflected TM component of TE wave. Am I right?
    Thanks for your patience.


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    Re: How to understand floquet port in HFSS?

    Here is my understanding of the notation:

    FloquetPortX:Z,FloquetPortY:Z means SXY for mode Z.

    FloquetPortX:Z,FloquetPortY:W means SXY going from mode Z on the input to mode W on the output.

    Can someone confirm this?

    v/r

    jsc


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  8. #8
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    Re: How to understand floquet port in HFSS?

    Quote Originally Posted by w123jsc View Post
    Here is my understanding of the notation:

    FloquetPortX:Z,FloquetPortY:Z means SXY for mode Z.

    FloquetPortX:Z,FloquetPortY:W means SXY going from mode Z on the input to mode W on the output.

    Can someone confirm this?

    v/r

    jsc
    I don't know whether u have solved ur problem, but actually, ur description is the answer.
    Here I take one example
    in the simulation only one port exists.
    if ur setup in the floquet port is TE00 TM00 TE01 and TM01, 4modes
    the result wold be a 4x4 matrix
    and (1,1)is S11 for TE00, which means the te00's reflection coefficient, (1,3) is S11 for TE00 and TE01,which means when ur input is TE00, it exciters TE01 mode, and this TE01 get back to the port. Similarily, (3,2) means s11 for TE01 and TM00, which means the reflection of TM00 exicted by the input TE01.


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