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Haj Hassan

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Everything posted by Haj Hassan

  1. Hello, i am simulating a horn antenna with a Dielectric Resonator. I am interested to see only the Radiation pattern of the Dielectric Resonator without the radiation pattern of the Horn. That's why there is the possibility in Feko to use Under (Near Fields- modify near Field- scope- Field Calculation- Field calculation using only sources on elements with specified labes). Unfortunately this one is working only with Farfield and not with near Field!!!!! In the near Field i can't see anything?!?!?! What is the reason?!?!? Thanks in advance Best Regards M.Haj Hassan 2-Horn with 2x8 sph DR 10 GHz mode 1.cfx
  2. Hello, thank you for your answer. What about if i want to change the horizontal axis with another number like instead of 30, 40 ,50 i want to put 1, 2 and 3. Thanks in Advance. Best Regards Haj Hassan
  3. Hello, Please check it. Thanks Haj Hassan Flat_luneburg.zip
  4. Hello, we are getting some problems to finish this simulation, although we used FEM with MoM. Can you please support us if it is possible? Thanks in Advance. Best Regards Haj Hassan Flat_Luneburg_lens_with_6_layers.cfx
  5. Hello, here it is. Best Regards Haj Hassan 1-Stealh with mode 0.cfx
  6. Hello, unfortunately the model is to pig. You can upload the model and illuminate the plane with the sph file. The Distance is not a problem. Best regards Haj Hassan 1-Patchantenna Array 8x f_10GHz 19.6_FarField1_mode_0.sph wing.stp
  7. Hello, i have to use vortex waves and that's why i have to use normal antennas instead of a plane wave. Is there something better to make it?! Best Regards Haj Hassan
  8. Hello, i am currently simulating a drone to study the radiation pattern of this drone with vortex waves. I am using MLFMM to make the simulation time less. Is there any better option to reduce more the simulation time? Thanks in advance. Best regards Haj Hassan
  9. Hello, i hope that this file will help you. Thanks in Advance. Best regards Haj Hassan parameter_sweep.zip
  10. Ok thanks a lot. Best regards Haj Hassan
  11. Hello, are there somewhere some ready models for RCS like a drone oder a quadcopter for example. Thanks in Advance. Best regards Haj Hassan
  12. Hello, this is very interesting. Thank you. Haj Hassan
  13. Hello, i am trying to illuminate a target with an antenna (Gaussian beam for example). If i want to see only the radiation pattern or the scattering characteristics of the target, then how can i do it if it is possible? Thanks in advance. Best Regards Mohamed
  14. Hello, thank you very much. It is working. Best Regards Haj Hassan
  15. Hello, sorry i sent you the wrong email. Best regards Haj Hassan 1-Verschiedene permi.cfx
  16. Hello, thank you for your answer. Attached you will see my model. The waves are going in the angle 270. Thanks in Advance. Best Regards Haj Hassan 1-Verschiedene permi mode 0.cfx
  17. Hello, currently a student is trying to optimize a lens with multilayers for antennas. He is using MLFMM to decrease the simulation time. Unfortunately the simulation is not finished for some reasons. What can we do finish the simulation with less time?!?!?!? Thanks in advance. Best Regards Haj Hassan
  18. Hello , i want to know how can i simulate the RCS of a material under test with a normal antenna instead of a plane wave? I need it because i want to measure the RCS with vortex waves or OAM waves. Thanks in advance. Best regards Mohamed
  19. Hello, I am trying to see the different radiation pattern for several materials with different permittivities. To make my simulation easier, i used planar multilayer substrate. When i check the results i found something strange. The higher the permittivity , the higher the reflection of the waves will be. This is correct in the results. But the strange is in the case of the transmitted waves!!!! In general the higher the permittivity , then the lower the transmitted waves will be, which is not my case?!?!?!?!? Why is this happening? I think i made a misstake in the options. Thanks in Advance. Best Regards Haj Hassan
  20. Hello, i simulate with Feko a reflektor with many heights. I got for example 5 S11 for 5 different heights, which is very good. I saw the S11 in the frequency. Now how can i change the horizontal axis from the frequency to the heights. Best Regards Mohamed Haj Hassan
  21. Hello, i am wondering why i can't see always´the realised gain. If the case of one antenna like patch i can see the realised gain. But in the case of patch antenna array i can't see the realised gain!!!! what is the reason? Thanks in Advance Best Regards Mohamed Haj Hassan
  22. Hello, thank you very much for your support. How can i make the full MLFMM? please tell me the right steps. 1-Shall i use Mom or MLFMM???? 2-Shall i decouple PO and MOM???? 3-Shall i use for the Reflector PO always illuminated?? Thanks in advance. Best Regards Mohamed Haj Hassan
  23. Hello, i am currently simulating patch antenna array with a reflector. I am using MLFMM and PO always illuminated for the Refletor. I enlarge the Ground of the antenna to see the Influence on the radiation. What i am not understanding is that the waves are going through the antenna!!!!! After the Reflection of the waves the antenna is neglected for the waves!!!! Can somebody help me???? Actually i want to study the behaviour of the size of the Ground on the waves. Thnaks in advance. Best Regards Mohamed Haj Hassan Patchantenna_with_reflector.cfx
  24. Hello, i am trying to test some refkectors with several material like PEC or copper etc. The problem that i met, is that i can't change the material from PEC to another material like copper or aluminium. How can i make it? Thanks in advance. Best Regards Haj Hassan
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