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mgmv7

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  1. let me know if you are unable to open/ view the attachment.
  2. @JIF @MvdM Hi! I want to construct hypothetical antenna (isotropic antenna) in FEKO . I want to replicate one of the IEEE papers FEKO simulations, I have tried number of times but unable to get the plot . Below I am attaching the image which has FEKO plot . The details are as follows The variation of electric field strength between a half wave dipole antenna and hypothetical (isotropic ) antenna . The frequency used is 1GHz , the relative permittivity of ground is 4 and conductivity is 2e-4. BELOW IS THE FEKO PLOT ENCIRCLED IN YELLOW BORDER . I am unware of modelling of isotropic antenna with gain 1. Please guide me in modelling so that I can get graph just like below.
  3. @MvdM @JIF Could you let me know the best options in FEKO for modelling a. IDEAL RECEIVING ANTENNA b. ISOTROPIC (HYPOTHETICAL ANTENNA) c. point source
  4. thank you . your comments helped me a lot .
  5. Thanks @MvdM for replying to my post . I am attaching the cfx file again lossy.cfx . FEKO version currently I am using is 2019.0.1. I could fix the problem to some extent, when I am sweeping the distance from 10 to 1e4 m , with 2 samples . When I am trying to increase the samples I could still get the same error . Worst part is post FEKO processing time , for two samples its taking 1-2 hours and merging files is stucking up at 60 % . Till now I am unable to view my result . Below I am attaching the FEKO result of a paper , which I am going to replicate it but I got stuck up . I THINK THIS TIME YOU HAVE RECEIVED CFX FILE AND AN IMAGE (PNG FILE )
  6. Hi @JIF ! I am trying to get electric field strength graph w.r.t to distance between two dipole antennas i.e how electric field varies from antenna 1 to antenna 2 while sweeping the distance . For this I have requested near field pattern . While doing that I could see " Error 17413: .\shared_helper.lua:108: An error occured while creating the models." , which Iam unable to trace . My distance is from 1*lambda to 1e5*lambda . Could you help me in debugging the error ? lossy.cfx
  7. @mel How can choose theta and phi ranges for far field pattern? Is it specific to each problem?How can I identify the ranges to a particular problem? Thanks in advance.
  8. thank you @MvdM Can you tell me how to use lua file?
  9. Thank you @MvdM Here is my problem. I need to calculate mutual coupling (Z12) between two identical half wave dipoles both in parallel and collinear configuration. The radius of the wire is 1e-5lambda and the operating frequency is 200MHz. BOTH MY DIPOLES ARE PLACED IN FREE SPACE.For this case, I am following Sweep parameter example . I have few questions regarding my problem , simulating in FEKO. 1. I Shall take global radius as 1e-5lamba. Is it correct? 2. Should I follow same method like the example for half wave dipole parameter sweep i.e, calculating length scale then putting the evaluated length scale back and calculating self impedance? 3. I need to vary distance(d) from 0 to 15lambda in parallel configuration 4. What is the mesh size I shall take? How many samples I shall have? 3. What necessary modifications should I make in example to meet my problem requirements? I have tried but I am not confident about my results. I SHALL BE THANKFUL TO YOU IF YOU ANSWER MY QUESTIONS.
  10. Hello ! I have got the post feko graph page but in the stored data I got voltage source1_sweep and voltage source1_sweep_1. I am bit confused , from which I get real and imaginary self impedance graphs ?
  11. Good Time ! @JIF Can you help me how to plot mutual impedance between two antenna elements as a function of separation between them in parallel and collinear configuration? So far what I did is , i have takes S-parameters for each corresponding distance and converted to Z parameters using S-Z formula conversion and dumped those values in matlab and plotted the graph for mutual impedances for the corresponding distances? Is it the way or do we have any direct method?
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