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Recent content by Rf engineer

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    CFIE EFIE and MFIE : A basic querry

    Dear Members, I seek your assistance to understand the following: When we combine EFIE and MFIE to form CFIE for a PEC formulation, why do we apply [n x ] to EFIE before adding it to MFIE. I heard that it is related to the stability of the solution, but I could not find any explanation in any...
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    Tan Delta : How to use it in lossy material

    Hello, I have plotted a scattered field from a dielectric cylinder, assuming it lossless..... now I have to plot it assuming it lossy, I am given with only one parameter, tan delta = 0.01. Can some one guide me how to place this tan delta in calculation expressions..... for example I have...
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    Need Matlab implementation of Cylindrical Scattering

    Dear Friends, I want to understand and implement the "Addition theorem for Hankel Functions" Equations 11-82 from Advanced Electromagnetics by Balanis. I never took lectures on this course and I am following the book myself, and I am unable to find an easy proof for this equation, specially how...
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    Phase representation in HFSS !!

    hello wis, Please tell me the solution of your problem if it has been solved by you. I need to know the same. I have modeled a circular to linear polarizer converter, and I need to plot the phase shift after the quarterwave plate for 90 degree phase shift........ I also need to plot the...
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    HFSS, Axial Ratio for Circular Polarization

    Dear friends, I have modeled a steped septum square waveguide polarizer, which makes two linear pol to a RHCP or LFCP and vice versa. I have find all the S Parameters very good. But I need to see the axial ratio between the two orthogonal components Ex and Ey. Please explain me how can I...
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    Axial Ratio in HFSS for square waveguide septum polarizer

    Dear friends, I have modeled a steped septum square waveguide polarizer, which makes two linear pol to a RHCP or LFCP and vice versa. I have find all the S Parameters very good. But I need to see the axial ratio between the two orthogonal components Ex and Ey. Please explain me how can I...
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    Waveguide Step Impedance

    Dear Friends, I have to do the impedance matching of a ridged waveguide with a standard Ku band rectangular waveguide, as impedance step transformer. May be chebyshev tranformers. I have studied a lot of text and research papers on these topic where i just got the theoratical formulaes....to...
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    Std Air Filled RWG HFSS results unexpected: help req

    hi, i have simulated a standard air filled Ku band rectangular waveguide with dimensions (15.8 x 7.9)mm for the dominant mode. It has a cutt off at 9.49 GHz, and I am operatnig it between 12.4 - 18 GHz as per standard specifications. It should give about 0dB S11 at cutt-off, but it gives...
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    patch antenna design using hfss

    look the other guy has guided you very well .....even i did not have the HFSS 11 book and you have fine from him..... You must find all the formulaes in Pozar book on microwaves or Belinis book on antennas....... this is not at all a big deal..... if you have lengths and material properties in...
  10. R

    Wave Port E Field Polarization

    Hi friends, Please find the attached model and a picture of a wave port excitation for a circular wave guide. How can I make this tilted polarization correctly TE11, aligned to the integration line, along z axis. Please help me out of this...... Thanks
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    E polarization for Wave Port

    hi friends, I will highly appreciate if some one can tell me, how to calibrate tilted polarization in HFSS 12. When i use HFSS 9, i find a check box "Polarize E Field", which has aligned my E field along the integration line...i-e yielded a perfect TE11 mode for a circular waveguide. But in...
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    how to change incident power in HFSS

    Hi friends, Can you please tell me. how can I find the impedance for the wave port, for which I have calculted my S Parameters. Or How can I find input impedance of my model. Its a simple circular waveguide, excited with two wave ports on each end.
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    Circular waveguide...Model Attached...Plz Help

    Dear friends I have solved the problem, by checking "Polarize E fields" in the excitation menu....the fields are get alligned and giving good S parameters........ But now I want to know, what is the Port Imepdance on which the HFSS has calculated the S parameters...... I mean if the S...
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    Circular waveguide...Model Attached...Plz Help

    dear freinds, I have modeled a simple CWG that can operate between 48 to 52 GHZ. Its radius is 2.05mm and Length is 18.15 mm. Please find the attached model. I just run the ports only solution and found that my E field patterns are tilted for both the ports....which yield very bad S...

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