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Thread: How To Make: CHEAP Homemade Parabolic Reflector Antenna

  1. #11
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    Quote Originally Posted by -~operator~- View Post
    ok, here's the setup:
    I have 2 AP's, my router on the ground floor and a repeater on the 2nd. I sit in the same room as the repeater, with my laptop approx. 5 metres away. I had to do this because the ISP connection is on the ground floor. So the 2 APs have a bridge across 2 floors, one with floor heating (i think this will also reduce signal strength with the metal in the floor).

    So i got me some paper and scissors . First thing i tried is to use it with my external 5db Antenna, pointing it directly to the repeater. I had an SNR increase from approx. -90 to a maximum of -70. But this was not very significant, because i reached -70 even without the reflector. I thought it could be because the reflector does not cover the whole antenna. i will build a bigger one and try again, perhaps i can manage to get a straight connection to the router on the ground floor.

    So i thought, why not use it between router and repeater. at the router web config, i can see the signal strength of the repeater. until now i had a connection speed of approx. 20 MBit, signal strength kept jumping from 18-25%. Put the reflector on: Voila! strength 65%, constant 54MBit. It also pays out to play a bit with the reflector direction.

    Veeeeeery nice! and this made by... nothing! a little paper, some tin foil and a bit of time! this is so cool, thanks for the link!
    It does so make my heart soar to hear this! And yes..I should have posted this as well....

    YOU NEED TO MAKE IT FIT BEHIND THE WHOLE ANTENNA FOR BEST RESULTS!!

    I made mine out of a piece of THIN and cheap sheet metal for 5 bucks at Home Depot..and I put it behind the antenna connected to my Airlink card about 2 inches away from it, ...here Ill go take pics..

    BTW IF ANYONE HAS ACCESS TO A DIGITAL CAMERA..PLEASE POST PICS WITH YOUR RESULTS!
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  2. #12
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    Ok, here was my first attempt like a month or 2 ago.
    Notice the placement of the sheet metal?? Its only about 2 inches from my antenna, and it covers the ENTIRE length of my antenna, and then some..the and them some IS NECESSARY for optimal results!!




    Pretty primitive huh?? This was for my HOME use...not wardriving.
    [CENTER][FONT=Book Antiqua][SIZE=5][B][COLOR=blue][FONT=Courier New][COLOR=red]--=[/COLOR][/FONT]Xploitz[FONT=Courier New][COLOR=red]=--[/COLOR][/FONT][/COLOR][/B][/SIZE][/FONT][FONT=Courier New][COLOR=Black][SIZE=6][B] ®[/B][/SIZE][/COLOR][/FONT][/CENTER]
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  3. #13
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    here's one from the repeater... you can only see the back side cause it's facing downwards... and i will not touch it anymore...

    will post more from the external antenna.. i'm working on it...
    The answer is 42.

  4. #14
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    Pretty cool that even through all your floors and walls and metal..that this little cheap parabolic reflector can do so good huh? Remember..your gonna get TRUE TRANSMIT AND TRUE RECEIVING POWER FROM THE BACKFIRE IT CREATES! That means you can INJECT further as well. I haven't seen an amplifier that can increase RECEIVING POWER..only seen em increase the TRANSMIT power. GOOD JOB!!..and P.S..I don't blame you not wanting to touch it..cause if its even off 1/4 of an inch...your signal quality and everything plummets!

    ****EDIT****

    Hey theprez98,

    Any chance of getting this thing stickied??
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  5. #15
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    THIS IS SO SWEET... i made another reflector for my 5 db antenna... and now i can connect directly to the router. but still get some problems here.. signal strength is not good and i often lose connection... have to try a bit more....
    The answer is 42.

  6. #16
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    this is great, cant wait to test it out! thanks xploitz!

  7. #17
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    Heres a really AWESOME killer parabolic..this guy really took his time and did a fantastic job! Heres 1 pic...



    And heres the link of more pics and instructions.

    http://www.wardrivingonline.com/equi...ic-antenna.htm
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  8. #18
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    i did a bigger one for my external 5 db antenna.. you can see the rising in connection speed with and without the directional antenna. jumped from about 5Mb, 11 Mb to 54Mb.... really great!!!
    The answer is 42.

  9. #19
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    Wow! Thats some pretty impressive bars you got there -~operator~-.

    Have you had a chance to test the distance improvement yet for both sending and receiving?? I bet you'll be surprised!. Its almost like adding a damn signal booster or amplifier to your antenna.
    [CENTER][FONT=Book Antiqua][SIZE=5][B][COLOR=blue][FONT=Courier New][COLOR=red]--=[/COLOR][/FONT]Xploitz[FONT=Courier New][COLOR=red]=--[/COLOR][/FONT][/COLOR][/B][/SIZE][/FONT][FONT=Courier New][COLOR=Black][SIZE=6][B] ®[/B][/SIZE][/COLOR][/FONT][/CENTER]
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  10. #20
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    well, i have to admit that i was starting to get pissed off cause i couldn't figure out the right direction. you know, there are two floors and, i think at least 2 vertical walls between it. at first i had it sticked to my desk with the magnetic antenna but then i realised i am too close to the walls. got interruptions and got really frustrated... but now i found the right place and i am sooo happy!

    now i can use my spare wireless router for testing injection and stuff, and this is another point i am happy about. too bad i can't use this for wardriving...


    Have you had a chance to test the distance improvement yet for both sending and receiving??
    i used it for a slow 360 degrees turn and found some wireless i have never seen before... very impressive.

    i am so happy i think i will open another beer
    The answer is 42.

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