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- Today
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1370mm
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that is, for a frequency of 2.45GHz, it is not possible to obtain a gain of 20db?(and would it be difficult for you to share the model file, it will help me with my study assignment)
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that is, for a frequency of 2.45GHz, it is not possible to obtain a gain of 20db?
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LOOOONG TZAR YAGI...950 mm
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good luck with THAT (Yagis hit a wall around 16dbi) more than 20 is a LOOOONG YAGI...and 200mhz bandwidth conflicts with gain...(A different antenna or a PARABOLIC DISH would get the gain , not the bandwidth)
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,,, a rim around the reflector,it is not of major importance,so it may be missing...!!!
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Is soldering suitable instead of welding?
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It was not possible to attach images. Therefore, I quote. A question for the administrator. Is this option suitable for antennas 1800, 2100? If you make a rim around the reflector.
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I think such an antenna with such characteristics, besides the fact that it is very long, is even more difficult to obtain. Anyway ,I will try to satisfy your request...!!!
- Yesterday
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I ask for help in calculating and modeling an antenna (Disk-Yagi or BDM-2) with a frequency of 2.45GHz, a bandwidth of 200 MHz, a SWR of no more than 2, and a gain of at least 20dB, a resistance of 50 ohms.I would be grateful for your help.
- Last week
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,,,,prda, your antenna looks like this... ,,,your antenna... ,,,and patch antenna 5 GHz ,10 dBi...
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Balanced vs Unbalanced
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20251126_232258.mp4 do you have the dimensions of this type of horizontal and vertical polarization antenna for 2.4 ghz
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do you have the dimensions of this type of horizontal and vertical polarization antenna for 2.4 ghz. olx18m-097070-00_1.webp
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Thank you for your comment, Clanon! Could you check links that you sent? It seems they are not clickable...
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Dimensions are related to Lambda , it might be Full wave to work...like a Quad... did you try an Array...?
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ALL BALANCED LOADS (electrically symmetric) Antennas , require a BALANCED Feed...since the use of a BALUN (which adds problems in itself , bandwidth is reduced , etc) Balanced load balanced feeding (Twin Lead or BALUN) UN Balanced Load UN Balanced feeding (COAX straight in)
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I tried to do a simulation for this antenna and it resulted in some miniature dimensions....!!! ,,,and for the 5.8 GHz frequency...
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If you solder the shield of the coaxial cable to the ground, it is not recommended.
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Hello! Dear admin, i need you help! In the video below man describes the process of building the same biquad antenna as you did. The result looks fine.... but! Is it really necessary to solder reflector to ground (shield) of fed coaxial? And the second thing is feeding this antenna. I believe it will be much better (handy) to make some "pin fed" solution, but i can naot imagine how to do it. Have you got any references for this case?
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The dielectric constant of styrofoam (expanded polystyrene) is approximately 1.02–1.04. This low value is due to its low density, which consists of air bubbles (with a dielectric constant close to 1) and the polystyrene material itself. The dielectric constant of solid polystyrene resin, without the air pockets, is higher, ranging from 2.4 to 2.6. For expanded polystyrene (styrofoam): The dielectric constant is approximately 1.02–1.04, which is a very low value due to the high volume of air in the foam. For solid polystyrene resin: The dielectric constant is higher, ranging from 2.4 to 2.6. Factors influencing the value: The dielectric constant is influenced by factors such as density, moisture, temperature, and frequency. Frequency dependence: While the dielectric constant of solid polystyrene is relatively flat up to 1 GHz, the value for the foam is measured in specific ranges, like 100-400 MHz.
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This is harder to build...
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Try this : Luneburg lens the Dielectric Constants should be changing from low outside to hugest in the core (twisting the Beam towards the center) https://www.analogictips.com/wp-content/uploads/2023/08/WTWH_Luneburg_lens_Pt3_Fig4.png also flat disc https://www.sciencedirect.com/science/article/pii/S2211379724000329
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After so many years I tried to recreate this antenna with the dielectric lens....
- Earlier
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lo mas fácil es tener un cable (corto) de 50 ohms desde la antenna hacia la wlan y el conector hembra a rosca sin soldar dentro del PCB Easiest way is a coax from antenna (SHORTEST POSSIBLE) towards the usb wlan card and the SMA female attached to the card (and avoid soldering inside the card) incluso el conector roscado al reflector Disc seria lo mas corto y fuerte (el ultimo disco y mayor diámetro puede estar directo al exterior del coaxial)
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