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Recent content by antenna_beginner

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    Systevue atennuator power level problem

    Hello ,in the attenuator i have defined the insertion loss of 0.4dBm , however in the plot i can see a reduction of 6dBm as you can see in the attached plot and settings of attenuator.where did i go wrong? Thanks
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    ADS genesys 10 way microstrip splitter

    Hello, is it possible to design microstrip1o way power splitter? i know that a T splitter splits into two , but `10 way requieres two components of 5 way splitters. Thanks
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    recreating chebychev coefficient from an article

    Hello i need to recreate these chebychev coefficents given the initial value of X_0=1.853 as shown in the photo bellow. i have tried to follow the iterrative algorithm shown in the photo bellow. please help me understand where did i go wrong? Thanks
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    [CST]whaveguide port not algined with the global cartesian coordinate system error

    Hello, i have build a complex shape with a coax canle port. so i put a wavguide port to it, but i get an error that is not aligned with global cartesian coordinate system. I cant see the global coordinate system when i am modeling, its presented on the right corner and i have no clue if its...
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    help udrestanding the values in this table

    Re: what kind of trial an error was done here ok they pick combinations of C1 and C2 , for what purpose? in the solution they say that at minimum point: theta=pi/2 C_min=-21dB=0.089125 C=C_1*sin(3/2*pi)+(C_2-C_1)sin(pi/2)=-C_1+C_2-C_1=C_2-2*C_1 eq1. 0.089125=C_2-2*C_1 C_max=-19dB=0.1122...
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    help udrestanding the values in this table

    Re: what kind of trial an error was done here we want a 20dB couping with 1dB ripple, so Cmax is -19 and Cmin is -21 what kind of itterations?, why they pick each time a different C_max? C max is -19 dB which is 0.112202 C max and Cmin are given to us from the question Thanks
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    help udrestanding the values in this table

    what kind of trial an error was done here Hello , i am having trouble understanding what was done in the table in the attahed photo ? thanks
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    help udrestanding the values in this table

    Hello, anyone has an idea regarding how did they got these values? thanks
  9. A

    trying to figure out fringing capacitance expression of an offset coupler

    Hello , for the purpose of impedance compensation of step discontinues ,for the expression shown bellow i need the fringing capacitance. but i only managed to find the odd mode and even mode fringing field capacitance plots of broadside coupler(which is the closest to offset coupler) how can...
  10. A

    recreating a mathematical 3D shape

    Hello, I am trying to recreate a shape shown in the attached photo, from the attached article I have tried to create this shape in MATLAB as shown in the code bellow , from this formula i get a 2D shape and not the shown 3D shape , how to create this 3D shape? Thanks theta_0=15; alpha=60...
  11. A

    edges causes bad s11 at high frequency

    Hello , in a coupler design the discontinuities causes bad s11 at high frequencies, i tried many ways of smoothing but its not sufficient. what could be done?
  12. A

    multi section coupler impedances algorithm

    i have read lots of articles and they dont go into specifics regarding how mathematckly they derived these numbers. i know that its odd mode chebyshev polinomials. but how exactly it could be done mathemticky its hard to say. if you could share some example. Thanks
  13. A

    multi section coupler impedances algorithm

    Hello, i would like to create an 11 section coupler with 0.1 ripple, i cant find an example of how exactly they got these numbers in the attached photo. Thanks
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    CST script for multiple siquential simulation

    Hello , i need to run many simulations where i cant define them with a parametric sweep, and i need to run them sequentially , is there a way i can run many simuations one after the other with a script?
  15. A

    prolongation of the legs ruins the results

    hello the main problem is that my S11 S22 S33 S44 are noot equal ,although my dimentions are equals is the a way to see where is the problem? Thanks
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