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About oussama1

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  1. the problem solved. i have built the model in feko. However, the process become so slow during the projection of 3000 apertures over the cylindrical surface. my model is the attached image. simple braided shield model in feko
  2. Since no one has answered my question i would like to answer it by my self. waveguide ports without sources are considered to be absorbing i.e. are connected to their characteristic impedance. i have validated that by extracting the S-parameters and i found s11 is equal to zero given port two connected to waveguide port without source.
  3. I want to simulate triaxial cable as shown in the attached image. i have use waveguide port, however, error is occurred, please can you tell me where is the mistake in my model. the model is also attached. thank you in advance. output file results triaxial cable.cfx
  4. Waveguide ports without sources are considered to be absorbing waveguide terminations in FEKO. i m wondering that if it is possible to consider those terminations as matched terminals ? simply : absorbing waveguide terminations = matched terminations ???? let's suppose a coaxial cable in which waveguide ports are considered. port 1 is connected to a waveguide source, where the port 2 is not connected. is it possible to say that the port 2 is connected to the characteristic impedance of the coaxial cable Z0=sqrt(L/C) ? where L and C are the p.u.l parameters of the coaxial cable Coaxial cable with waveguide ports
  5. I want to add apertures (holes) over curvature surface (cylindrical for example). How can i do this ? my purpose is to model braided-shielded cable. thank you in advance
  6. thank you so much for your help, you are a great helpful person
  7. please check the attachment to see my model coxial_cable_testing_real_shielding_6_perfect_conductor_cylindrical.cfx
  8. thank you so much, if i use cylinder wire, how can we add a load to it? should i use small segment wire to add a load ? or there is another way ? also, what is stray inductance, how can i add it and how i should connected to the grounding wires? thank you in advance.
  9. thank you so much for your help. However, how can we mesh the cylinder into triangles with the edge lengths the same as the spacing between the inner and outer conductor ? what about the outer conductor connection to the ground? should i use wire approximation or cylindrical ?
  10. what is the best terminal geometry of a coaxial cable so that to get high accuracy results ? please see the following figures case 1 : case 2 : However, both results does not agree with TLM solution performed by FEKO. why? is the terminal connection geometry effect the results ?? TLM solution using transmission line model schelkunoff model for transfer impedance
  11. let's suppose a non-coaxial cable where the inner conductor is shifted from the main axis of the outer conductor. does there is a way to extract the transfer impedance of this cable by using the full-wave simulation ? suppose the shield is braided as shown in the image. However, the inner conductor is shifted (in the image is not shifted)
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