Hacer Antenna Wifi Biquad Antenna
Wireless enthusiasts have been repurposing satellite dishes for a couple years now. This summer the longest link ever was established over 125 miles using old. WiFi Antenna MACH 1 Single Biquad Booster Long Range RP-TNC GET FREE INTERNET See more like this Biquad Antenna dish feed with lips cantenna Booster Long Range N or RP-SMA Brand New.
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Wireless enthusiasts have been repurposing satellite dishes for a couple years now. This summer the longest link ever was established using old 12 foot and 10 foot satellite dishes. A dish that big is usually overkill for most people and modern mini-dishes work just as well. The dish helps focus the radio waves onto a directional antenna feed.
We're building a biquad antenna feed because it offers very good performance and is pretty forgiving when it comes to assembly errors. Follow along as we assemble the feed, attach it to a DirecTV dish and test out its performance. With just a handful of cheap parts, a salvaged DirecTV dish and a little soldering, we were able to detect access points from over 8 miles away. Using consumer WiFi gear we picked up over 18 APs in an area with only 1 house per square mile. Building the antenna Biquad antennas can be built from common materials, which is nice because you don't have to scrounge around for the. We did have to buy some specialized parts before getting started though.
The most important part here is the small silver panel mount N-connector in the center of the picture; the entire antenna will be built on this. We purchased it from S.M.
The 'N-connector' is standard across the majority of commercial antennas and you can connect them to your wireless devices using 'pigtails.' The longer pigtail in the picture is a that we'll use to connect our antenna to a Linksys WRT54G access point. The short pigtail is a so we can connect to our WiFi card which is pictured. We also purchased 10 feet of so we wouldn't have to sit with the dish in our lap.
We got our surplus DirecTV dish from. We'll cover the reason for the mini butane torch later. Trevor Marshall built one of the found on the internet. We followed the slightly more thorough instructions.
Here are the raw materials we started with: The wire is standard solid-core 3-conductor wire used for most house wiring. We didn't have any copper printed circuit board material laying around so we used this thin sheet of copper and supported it using the 1/4-inch thick black plastic pictured. The first step in building the element was stripping and cutting a 244mm length of wire. We marked the wire every 31mm with a permanent marker and began bending the wire into a double diamond shape.
We tried to make the length of each leg 30.5mm. The easiest way to make really sharp bends in the solid copper wire is to use two pairs of pliers. With the pliers held perpendicular to each other bend the wire against one of the sets of jaws. The element with all bends completed: Next we cut out a 110mm square of black plastic to use as a base for the reflector. We drilled a hole in the center to clear our connector. We then soldered a piece of copper wire to the center pin of our N-connector.
Next we soldered a piece of of wire to the outside of the connector. We ran into some trouble here. Our cheapy iron was not capable of getting the connector's base hot enough to make a good solder joint. We bought a butane torch and used that to heat up the surfaces. This worked pretty well except it desoldered our center pin. We recommend you solder the outside piece of wire first before doing the center one. After the connector had cooled it was attached to the black plastic base using epoxy.
The thin copper sheet was attached to the front with epoxy and trimmed to fit. We let the epoxy cure for a while before proceeding. The next step was to solder our bow tie shaped element to the vertical wires. The element was supported by two pieces of scrap copper trimmed to 15mm to ensure proper positioning. Then the extra wire was trimmed off and the outside wire was soldered to the ground plane to complete the antenna. To make mounting to the dish easy we modified the original feedhorn. Here is what it originally looked like.
After removing the housing, internal components and shortening the feedhorn looked like this. The antenna is attached by inserting the N-connector into the tube and then connecting the coax cable. Here is a picture of the final antenna assembly ready to be attached to the dish. Since the satellite dish has an off-center feed it looks like it is pointed at the ground when it is level with the horizon. Even though there are no angle markings for setting the dish at 0 degrees inclination we can still ensure that the dish is pointing at the horizon by setting the dish angle to 45 degrees and mounting it on a tube with a 45 degree angle. Test results The Engadget Corn Belt Testing Facility has broadband access provided by a local WISP. So we knew if we plugged in our antenna we were sure to pick up something in the area.
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