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About tomasbj

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  1. Sure. I understand that this circuit solves the gain problem. I have never used somehitng like this. Thanks for your suggestion
  2. Hello, thanks for your answer @Admin . Apart, to make this antenna work at those frequencies and have 2dBi gain... should this antenna have an amplifier and matching network? I made my own model and the gain is very low. Thanks in advance for your help.
  3. Hi guys, I was impressed when searching online and I saw the 315MHz Rubber Duck Antenna. How is that possible? What is the shape inside of it? How can an antenna of 5 cm length to have a gain of 2 dBi? Please check this link: https://ctrfantennasinc.com/small-315-mhz-antenna-low-profile-antenna/
  4. Invalid SAB file, import failed! Thanks anyway.
  5. Hello, could you please share the file as IGES or STEP format, I will then import the neutral file into my 2021 version. 2023 is impossible for me to install it. Thanks in advance
  6. Hi Dr.Pepper, have you developed the data base? Let me know and I will contribute. Although we can share in this forum too. In a near future I will. I like it. The help in this forum is really good and deserves it.
  7. No, you are right haha I am interested on these type of antennas. In fact, I want to use this antenna solution to cover 30-170 MHz, with gain higher than -25 dBi. And consider a weight to be less than 1 Kg. A very challenging antenna. But who knows... perhaps, including ferrite and some dielectric materials I can achieve it. Otherwise... I will try another technology. Thanks for your support and asking.
  8. It seems I forgot to upload the paper X applsci-10-05392-v2 (1).pdf
  9. Great! Thanks. I am not able to check/test it until some days after, but when I can I will tell you how it looks
  10. I don't understand your question when you said, why at 300 MHz. Do you mean why is this antenna working at 300 MHz? Physically talking. Or why am I interested on this frequency range?
  11. Hi, here I attach the full document. Not, clear in the document either. That's my problem. More or less I could find the following dimensions that you can see in my cst file (v2020) At the end it acts as parasitic structure to achieve the 400 MHz matching. I can optimise later. But for the feeding I see it more complicated. Could you please help? ring_cage_parasitic_ant_v2.cst US9112258.pdf
  12. Hello, could you please help me with finding the matching between the design I made and the paper. I can not find the same results. See attached file. cst2021 Thank you spiral_v5.cst
  13. Hello, I am interested in the replication of this antenna. Could you please provide me an cst file of it? I see the feeding mechanism a bit difficult to make. Please check file attacged. Thank you in advance. ESA_example.pdf