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tomasbj
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Sure. I understand that this circuit solves the gain problem. I have never used somehitng like this. Thanks for your suggestion
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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.
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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/
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Invalid SAB file, import failed! Thanks anyway.
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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
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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.
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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.
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It seems I forgot to upload the paper X applsci-10-05392-v2 (1).pdf
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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
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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?
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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
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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
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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