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devton

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Posts posted by devton

  1. Posted

    6 hours ago, papagayor said:

    Dual Port Biquad, correct and suggestions please

    Biquad.cst

    it is better to make 2 separated biquad antennas with individual reflector each

    they gonna work better

    and with 2 separate you can experiment with -45 +45 polarization etc

    1 person likes this

  2. Posted

    16 hours ago, ohruxzy said:

    After extensive testing, I found that using an 80 MHz channel gives me significantly higher RX and TX rates, while 20 MHz performs the worst — possibly due to signal reflections or interference. Also, disabling WMM drastically reduces the overall speed so now using 80MHz channel is giving me 150 mbps down which is more than enough for me, i hope that doesnt change and it stays that way

    thnx for this data!

    sometimes on vacation i am getting internet via wifi in non-optimal condition just like yours - through buildings and using not the most powerfull atennas 11-12dbi, linear polarization, so i will try to use 80MHz mostly

     

    one lifehack, which i used before and it is well known for situation like yours (get through building):

    use Circular polarization antenna while AP still using traditional linear polarization antenna - you still get bigger speed compared situation you use linear polarization antenna 

     

    in your situation all already good - 150mbps with your hardware

    but another time if you gonna need to get wifi via bigger building, trees, etc circular polarization may be helpful

    1 person likes this

  3. Posted

    11 hours ago, ohruxzy said:

     

    @clanon I took a gamble and decided to buy the TP-Link CPE 710 — it's a 5GHz-only single unit, and I'm using it as a Wi-Fi receiver from about 100 meters away. The source is a Huawei router with a 5dBi omni antenna, but there's a medium-sized building made of bricks and concrete blocking the line of sight (so, no LOS).

    Despite that, the good news is I managed to establish a stable connection, getting speeds between 40 and 100 Mbps depending on the time of day. I also made some tweaks on both ends: selected the best-performing Wi-Fi channel on the router, enabled Guard Interval and WMM, and set the channel width to 40 MHz for better performance.

    Screenshot 2025-05-05 013439.png

    Screenshot 2025-05-05 025850.png

    Screenshot 2025-05-05 025856.png

    20MHz width of channel for 5GHz - that is what can help to increase speed while connecting through building

    your choice of 40MHz width is good too...20 or 40 - one of this two will be best, other (wide) is not ok for this situation

     

    is WMM on\off making any difference?

  5. Posted

    8 hours ago, alireza_asol said:

    what you think about 3d-corner antenna compared to this?

    3d-corner looks very easy to build. 

    https://3g-aerial.biz/en/online-calculations/antenna-calculations/3d-corner-antenna-design-and-calculation

    which is better in your opinion fir 3570mhz ?

    thanks a lot.

    3d-corner easy to build

    this antenna maybe hard to cut circles, maybe not...

     

    the Easyest way for you is to try to use your quados 

  6. Posted

    1 hour ago, alireza_asol said:

    yes... thanks for information. when i chose quados antenna i didn't know that it has horizontal polarization. maybe amos antenna was a better choice.

    how is the polarization and 3d radiation pattern of patch array 2x3 that admin recommended?

    Well, you can use your quados8 if you place it parallel to the ground and point exactly on base station

     

    3x2 antenna from Admin...looks like it vertical polarization if placed as on picture

    it should have  beam, cone radiation pattern

    not too wide 25 degree or something like that

    1 person likes this

  9. Posted

    17 hours ago, alireza_asol said:

    hi

    which antenna design you recommend for band 42 lte with high gain?

    i tried to build quados 8 antenna but it didn't work...

    maybe it worked?

    did u checked your quados8 with SWR-meter?

     

    this antenna got horizontal polarization when placed vertical

    so it could not work with base station because of polarization missmatch -20...30db

     

    and if u rotate it 90degree, make parallel to the ground, it got ultra-thin radiation pattern so it is VERY hard to  point it to basestation

    2 people like this

  12. Posted

    On 25.06.2021 at 7:21 PM, Edel2020 said:

    hello greetings, any idea for an antenna for commercial fm with maximum gain and that is not of a monstrous size (no more than 3m)

    show us fotos or your fm reciever, please

    i think in your case there is some port\antenna missmatch and it is the only trouble on your way to ultra-long range FM-sessions

    1 person likes this

  13. Posted

    22 hours ago, Edel2020 said:

    Greetings ... I already tried it and it is very good for its size but no, it is not that good, it does not have enough gain and the F / B is not that good either I have stations behind that bother a lot...excellent site and there are very interesting things but who knows maybe there are better things

    )) i think u do not need just "better things"

    i found this "Sven says this horizontal antenna receives stations 250–300 km away in northern Germany almost like locals"

    and if u got some troubles receiving stantions from 250km, it is most likely because it is 75 OHM antenna and your reciever input is most likely 36 o 50 ohms

    1 person likes this

  14. Posted

    37 minutes ago, Edel2020 said:

    Greetings ... I already tried it and it is very good for its size but no, it is not that good, it does not have enough gain and the F / B is not that good either I have stations behind that bother a lot, I need at least 10 db in the whole band, or in large part at least to avoid having to use a signal amplifier, there are solutions, but they are huge monsters so I keep looking for something more ideal.
    I have reviewed http://www.ham-radio.com excellent site and there are very interesting things but who knows maybe there are better things out there, creative and intelligent people abound in this world.

    addind 1-2 directors and re-emulating this FM5 looks like good idea

    1 person likes this

  15. Posted · Edited by devton

    On 25.06.2021 at 8:44 PM, Edel2020 said:

    It is for DX, the long-distance reception of stations in the band 88 - 108 MHZ, between 200km and 300km and that also has a good F / B

    So THE best option 4 u is:

    Small FM5 Yagi

     

    because it is less than 3m, THE simplest construction, good F\B and tested for you requested distance:

    "Sven says this horizontal antenna receives stations 250–300 km away in northern Germany almost like locals"

    http://www.ham-radio.com/k6sti/five.htm

     

    it is so easy to produce. U can make your own and test it in couple hours

    1 person likes this

  17. Posted

    1 hour ago, clanon said:

    NON PERIODIC ( non resonant ) CABLE lengths shouldn't be a problem (only for signal loss , bad connectors, too long , bad quality losses)

    it's just an interaction between the VNA hardware and the cable...i think...

    CORRECT ME if i'm wrong.

    only practice will show...but i still think: cable length from #3 on video and conection scheme from #1 is the best option

    1 person likes this