Welcome to WIFI Antennas

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.

Sign In Sign Up

vars-cat

Members
 View profile  See their activity

  • Content count

    63

  • Joined

  • Last visited

Posts posted by vars-cat

  2. Posted

    On 20.04.2020 at 0:35 PM, Admin said:

     I managed to determine the optimal dimensions for this antenna with dielectric cover plate, but I will not post them....!!!!

    ,,,..!!Judging by the screenshot, you just increased the sides,,,...!! :)

    I wonder what will happen if you connect two pairs of ellipses in the reflector with such sides? 17+ dBi?

  5. Posted

    45 minutes ago, aurel said:

    Thank you jomy on simulation

    45 minutes ago, aurel said:

    forget about simulation ,every simulation show optimal or ideal values and don't represent real things.

    *facepalm*

    Some antenna design experts and the spectrum analyzer will not agree with you. There is nothing more to discuss here.

    1 person likes this

  6. Posted

    1 hour ago, aurel said:

    active plate 68mm dia MUST BE ISOLATED from metal rod

    aurel, I am really dissapointed in your explanation, active plate DO NOT MUST BE ISOLATED from metal rod.

    Here is a simulation of an antenna without isolating the active disk:

    1800 MHz - https://ypylypenko.livejournal.com/57630.html

    2100 MHz - https://ypylypenko.livejournal.com/73658.html

    2400 MHz - https://ypylypenko.livejournal.com/75267.html

    2600 MHz - https://ypylypenko.livejournal.com/57985.html

    All antennas work well without isolating the active disk.

     

    1 hour ago, aurel said:

    finished copper plate can be spayed with metal primer to protect copper.

    I wanted to say that on the street you can not use copper without protection.

    2 people like this

  7. Posted

    1 hour ago, mfa56 said:

    Then what is the ideal material for outdoor antenna?

    Galvanized steel 0.5 mm

    The сentral copper core of the coaxial cable must be protected from moisture. You can use nail polish.

    1 hour ago, mfa56 said:

    If copper get wet then does it works still?

    I hope I translated the question correctly.

    Wet copper will work, but over time it will begin to oxidize (deteriorate), and this may negatively affect its performance.

  9. Posted

    The tube is needed for reliability. 
    You don't need to isolate anything anywhere. 
    The cable braid must be in contact with the largest disk.

    Also:
    Instead of the RG-58 cable (high signal loss), it is better to use rg-6.
    The antenna made of copper cannot be used on the street.

    2 people like this

  15. Posted · Edited by vars-cat

    15 minutes ago, Admin said:

    No, this is even better...

    Not better. This antenna is much more complicated than batwing, and it's not as broadband. I need 470-820 MHz (to be more precise, then 500-800 MHz).

  17. Posted

    1 hour ago, Admin said:

    And yet, I do not understand, why you do not want to build this form of antenna ... ???

    ,,,,,Your Internet connection has a very high ping...!!!!

    The "classic" version is easier to manufacture. Also I thought that it is possible to reduce the size of the reflector a little (so that the gain at low frequencies does not fall below 9 dBi). I also wanted the "butterfly" to be attached to the reflector on metal (and not dielectric as in the model) rods.