VideoAerialSystems

Page 63 of 150 FirstFirst ... 1353616263646573113 ... LastLast
Results 621 to 630 of 1494

Thread: Crosshair - 10 dbic Circularly polarized antenna tutorial!

  1. #621
    Forum Member
    Join Date
    Nov 2012
    Posts
    21
    Quote Originally Posted by Nelapaty View Post
    Can I use a copper tube larger than 3/8ths i will be using a rg58 cable will that be a issue?
    any suggestions?

    Nevermind found my answer.. on page 11..
    Last edited by Nelapaty; 9th December 2012 at 12:03 PM.

  2. #622
    Forum Member
    Join Date
    Mar 2011
    Location
    Amherst, VA
    Posts
    7,352
    Quote Originally Posted by AbsoluteAltitudes View Post
    Well I finished and just ground tested my cross hair. I tested it side by side with my biquad, seems I get very similar results. Is that good?



    I was walking between 2 apartment buildings, and the signal was behind one of them. Im running 2.4ghz, and I am sure there is a lot of wireless internet in all the buildings. I made it about a 100-110 yards passing the signal through a brick building diagonally
    What transmit antenna were you using? CP or linear?
    If it is broken, fix it. if it isn't broken, I'll soon fix that.

    [url]videoaerialsystems.com[/url] - Performance video piloting

  3. #623
    Forum Member
    Join Date
    Mar 2011
    Location
    Amherst, VA
    Posts
    7,352
    Quote Originally Posted by chanyote66 View Post
    cool thanks,
    I was thinking of around 60mm and using copper clad PCB... wonder if the double sided would cause problems...

    IB or Hugo...
    Would having Double sided PCB cause problems if both sides are grounded?

    Chris
    Not at all. Just be sure the element lengths are exactly correct.

    -Alex
    If it is broken, fix it. if it isn't broken, I'll soon fix that.

    [url]videoaerialsystems.com[/url] - Performance video piloting

  4. #624
    Forum Member
    Join Date
    Nov 2012
    Location
    Grand Rapids, MI
    Posts
    194
    I was using a cloverleaf for both tests. I can change to a dipole and test that out with the biquad if that would make some difference?
    Last edited by AbsoluteAltitudes; 9th December 2012 at 02:36 PM.
    Rexnoobs: Hey watch out for that power line
    Me: you mean the one my tricopter is dangling from...

  5. #625
    Forum Member
    Join Date
    Nov 2011
    Location
    USA
    Posts
    6,044
    lol
    [QUOTE=jimmaplesong;128705]When you're outraged at chatch, please don't quote his bullshit.[/QUOTE]

  6. #626
    Forum Member
    Join Date
    Nov 2012
    Location
    Grand Rapids, MI
    Posts
    194
    whats so funny?
    Rexnoobs: Hey watch out for that power line
    Me: you mean the one my tricopter is dangling from...

  7. #627
    Forum Member
    Join Date
    Nov 2011
    Location
    USA
    Posts
    6,044
    That the biquad is linearly polarized and the Crosshair is circularly polarized, and you are asking if using a circularly polarized TX antenna matters
    [QUOTE=jimmaplesong;128705]When you're outraged at chatch, please don't quote his bullshit.[/QUOTE]

  8. #628
    Forum Member
    Join Date
    Nov 2012
    Location
    Grand Rapids, MI
    Posts
    194
    I was just being lazy. I had the biquad with me, so I hooked up on the walk back just to see. Then it started raining again so I did not get back out to try it with the dipole. My concern was more with; is that distance decent on the cross hair for a ground test for passing the signal through a building?

    Or would it be better to test it on the ground in open space to see what kind of range I get.
    Last edited by AbsoluteAltitudes; 9th December 2012 at 03:55 PM.
    Rexnoobs: Hey watch out for that power line
    Me: you mean the one my tricopter is dangling from...

  9. #629
    Forum Member
    Join Date
    Nov 2012
    Location
    Grand Rapids, MI
    Posts
    194
    So...
    Quote Originally Posted by AbsoluteAltitudes View Post
    would make some difference?
    Yeah, pretty stupid question, and worth a good laugh...lol
    Rexnoobs: Hey watch out for that power line
    Me: you mean the one my tricopter is dangling from...

  10. #630
    Forum Member
    Join Date
    Nov 2011
    Location
    USA
    Posts
    6,044
    for normal use, you really won't see that much of a difference. Half my videos are made with a linear duck on my quad and some CP antenna on the ground. But for range testing, it does matter. otherwise I don't see the point of range testing.

    your results were fine in my opinion.
    [QUOTE=jimmaplesong;128705]When you're outraged at chatch, please don't quote his bullshit.[/QUOTE]

Similar Threads

  1. Turnstile UHF RX antenna tutorial
    By IBCrazy in forum Video Aerial Systems
    Replies: 444
    Last Post: 11th January 2019, 07:23 AM
  2. Virevent & Turbine advanced CP antennas tutorial.
    By HugeOne in forum TrueRC Canada
    Replies: 110
    Last Post: 1st November 2016, 02:37 PM
  3. 70KM ANTENNA !!!!! ;)
    By sircana in forum Circular Wireless
    Replies: 187
    Last Post: 26th October 2012, 03:21 AM
  4. Dual polarized Patch Antenna - development
    By egosession in forum Video Aerial Systems
    Replies: 9
    Last Post: 26th November 2011, 01:23 AM
  5. circular polarized antenna
    By paede in forum DIY
    Replies: 11
    Last Post: 22nd October 2011, 01:53 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •