Wide Angle Sector antenna

This is the result , sorry if I have not screen capture it I am getting lazy do it right now, anyway, on the first graph the antenna is facing to the left @90 degrees (client antenna at 0 degree) I am still getting the same figure of -37db , the centre graph is the stock omni antenna which is within the same result of my previous test, the last graph shows the same figure but this time the antenna is facing the opposite direction, again I must stress that I’ve done this test at a close proximity and I know that there are reflected signal coming from the wall of the room, I will do an extensive test on an open space later on and I will update this blogsite for further result and on my last test I face the antenna’s backside towards the client antenna, the result is -68db, it seems that there is a huge drop, however, while the antenna’s backside is facing the client the antenna’s front is also facing the wall and for sure there are reflected signal that is arriving at the client antenna, again this is not an accurate result.

For now, this antenna seems to perform good but who knows??? I will do the test later on, I am planning to install this antenna at the front door facing towards my backyard, that way the signal is concentrated only within the premises of my house. My friend suggested that I should put it in an enclosure which I agree with him, however, I was too concerned about the loss in gain after enclosing it, he suggested that I should use an electrical plastic trunk (the square plastic that is use to keep wires) I also agree with him however I don’t have the material at hand.

I found a vacuum plastic tube (not the hose) with a diameter of 35mm and 1 mm thick, instead of using a plastic trunk I cut a size of 35.0mm, then I drill a 2.5mm hole and a slit at the side then I use a piece of acrylic to cover the top and glued/epoxy it, my plan for this is just to cover the feed point and let rest of the elements exposed (I hope that this is a good idea ), since the elements are exposed I might spray paint the whole antenna with a water resistance paint (appliance paint).

The Final “Sectored Antenna” with a tube cover. (this thing looks like a miniature orbiting satellite), anyway, I have not done a test with a tube at the feed point, I will do that later on, for now, the antenna is in action and it covers the whole premises of my house down to my backyard and there is no signal at the outside of my front house which is good and my it’s intention. To be continued…..

Return to the projects index page

This article has been reposted with the permission of the author.
The original article can be found here

12 Responses to “Wide Angle Sector antenna”

1. Dan Says:
   November 28th, 2005 at 14:34

   Wow! very impressive.

   I’ve build several antenna for wifi but have never found a design for a sector before.

   I look forward to you long distance results.

   Dan

2. ROLLIE Says:
   November 29th, 2005 at 17:59

   Got the idea, I am building a sector antenna based on your design, but will be using a different radiating element.

3. Lamar Says:
   January 14th, 2006 at 16:42

   I too live in Saudi Arabia, Rabigh is home for me, Facing the same problem, need 150 metes of WIFI coverage. Any help or joined support, would be great.

   Regards
   Lamar

4. Kanna... Says:
   April 12th, 2006 at 23:42

   What is the dimension of center element copper wire.

5. Kashan Ahmad Says:
   May 9th, 2006 at 16:31

   What are the dimensions of center element.

6. baerhloew Says:
   May 23rd, 2006 at 13:25

   Great job guys… Thank for you work…

7. FooBar Says:
   June 11th, 2006 at 17:35

   Perhaps you should put a link to the original design ?

   http://www.qsl.net/yu1aw/vhf_ant.htm

8. howdy Says:
   June 15th, 2006 at 1:03

   @foobar

   what makes you think that the link you provided is the original design? are you aware that the 4NEC2 has a template for that particular design? are you also aware that i have the pdf documents the chap did mentioned? he clearly states how he did his and none of your so called “orginal design” has the same dimemsion he used, although it has the same design look. That doesn’t mean he copied it or got the idea from your so called “original” design.

   incase you are not familiar with the things i mentioned, STFU.!
   give the chap some credit.

9. Luv Says:
   June 25th, 2006 at 6:26

   Great.

   Can we increase the gain by increasing the number of elements.

10. How do I build a tight beam directional antennafor wifi Says:
    July 17th, 2006 at 20:53

    My first project was a radio telescope 10 years ago, now I would like to build something that is
    VERY directional and can send and recieve to and from wifi devices with a range of over 2km
    what type of antenna is required I would rather build the thing myself if possible

    Please help

11. Zoran Says:
    August 14th, 2006 at 16:29

    Did yoy see amos 9 sector antenna? http://www.qsl.net/yu1aw/vhf_ant.htm Ithink it is a good antenna, i have made one and it works better than pacific wireless SA24-90-17 antenna, and i did not make it with perfect reflector. If some one try to make one i have interesting solutions for easyer making, contact me one zoran.s@verat.net.

12. Mohd Mostakim (Sattar) Says:
    August 19th, 2006 at 12:15

    I am going to build it soon and let gives u the result

Leave a Reply