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ዘካርያስ

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About ዘካርያስ

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  1. Thanks a lot for the invaluable guide !!!
  2. I want to model and simulate the cross-coupling between Tx and Rx of TEM horn antennas. Since the cross-coupling is unintentional and the Rx antenna is off-bore sight,how can i model it ? Is that possible by S21 or received power ? Note:- The purpose of the Rx antenna is to receive reflected signal from the ground and the Tx and Rx are operating in bi-static mode. Tx and Rx are near to each other. Tx----------Rx
  3. I want to model and simulate the cross-coupling between Tx and Rx of TEM horn antennas. Since the cross-coupling is unintentional and the Rx antenna is off-bore sight,how can i model it ? Is that possible by S21 or received power ? Note:- The purpose of the Rx antenna is to receive reflected signal from the ground and the Tx and Rx are operating in bi-static mode. Tx and Rx are near to each other. Tx----------Rx
  4. Hi Mel, Make two wires(lines) that join at their end,right ?
  5. Hi Mel, I continued working on the student version and i am able to create the dielectric media in the TEM horn. I set up the upper and lower conductors of the horn as PEC and the remaining faces as a dielectric boundary. But there is an error message while creating a wire port as shown below.
  6. Thanks, I understand ! But the below error message is appearing as i am using student edition.
  7. Dear Mel, Would you mind elaborating it ? For your further info below is pic that shows dielectric filled TEM(i found it from a certain publication).
  8. Thanks Mel, 5. I will work per the guide on "near field" request and will come back if i encounter difficulty. 6. Yes,the dielectric material is to be filled as shown in the figure you indicated i.e. in the free space b/n upper and lower conductors of the TEM horn. Any guidance how to do that ?
  9. Thanks for the response. Here are the clarifying points. 5.While requesting near fields for a 40 cm TEM in CADFEKO,it takes long time to respond. 6.I want to change the free space b/n the upper and lower conductors of the TEM horn by a dielectric media and see the effect on coupling on receiver antenna. I appreciate your quick response as usual. 》》If not clear please let me know.
  10. Hi all, How can i set a dielectric medium in TEM horn antenna i.e. in the free space between upper and lower conductors (as we know a dielectric can only be applied in closed regions) ?
  11. For #3 there is multiple freq option,please ignore that query.
  12. Hi Mel, Thanks for the usual unreserved assistance. I applied a wire port(segment) in the middle of a line, first by creating a line which starts @ (0.0,0.0,0.1) and ends @ (0.0,0.0,-0.1) then Unioned with TEM horn antenna. Note:- > The middle of edge of upper conductor of the TEM is (0.0,0.0,0.1). > The middle of edge of lower conductor of the TEM is (0.0,0.0,-0.1). > Unit measurement is made in cm. Below are my requests to proceed in my simulation. 1. How to request near and far field with respect to the TEM antenna size(example 40 cm length horn) ? 2. How to select mesh size with respect to TEM antenna size(Standard mesh is slected then what should be the wire segment example for 40 cm length horn) ? 3. How to select Frequency range in FEKO since only a single frequency selection option is available ? 4. Limitation of FEKO student edition with respect to TEM horn antenna size(example for 40 cm long horn) ? 5.What is the cause for delayed simulation in FEKO ? 6. How to immerse a dielectric in TEM horn antenna(As we know a dielectric can only be applied in closed regions) ? 7.Is that possible to apply a pulse in simulation ?
  13. Is "Line primitive" same as "Create Line" ?
  14. Hi, Thanks a lot for your assistance, i have created the TEM horn using the exponential equations in Cartesian-parametric interval per my design as shown in the attachment. Now i am going to excite the antenna via a 50 Ohm coaxial line without a balun,is that possible to choose wire port. Note:- The upper and lower conductors of the antenna are in union and at the origin the distance b/n the upper and lower conductors is 2 mm (0.2 cm). Best regards,
  15. Hi, I am trying on the analytical curve in parametric interval i.e. i entered the exponential taper equation for height of the TEM horn and also another exponential equation for the width of the TEM horn per my design but the geometry couldn't be generated. Shape of the required TEM horn is the below,
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