Turn your standard WIFI antenna into one just like the $30 range extender antennas for about 5 cents! Follow these easy steps, and then check out the video if you need extra clarification. Digg if you like my very first Instructable.

Step 1: Remove the top of your stock WIFI antenna.

A small flat jeweler's screwdriver works great!
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<p>db stands for decibel</p><p> so if you have a 10 db to start out with and add 5 db you end up with almost 1,000</p><p>.if you have a three db gain then it doubles what you start out with so 10 db+3 db gain=100 db add 3 more and you get 1,000 db with a 6 db gain so its a littol less than 1,000 b/c the gain is 5 db</p><p>hope that helps</p><p>KK4YTT</p><p>Eddie</p>
<blockquote>The decibel (<b>dB</b>) is a <a href="http://en.wikipedia.org/wiki/Dimensionless_unit" rel="nofollow">dimensionless unit</a>, used for quantifying the ratio between two values, such as <a href="http://en.wikipedia.org/wiki/Signal-to-noise_ratio" rel="nofollow">signal-to-noise ratio</a> or gain/loss of a circuit or antenna. </blockquote><p>You need to refresh your electrical engineering course because your calculations are incorrect. Values in decibels are adding, not multiplying the way you do. You don't start with dB, you must have a real electrical value to begin with, dB shows only a ratio of gain or loss, it is not a value to start with. If you have a value of 100 mW which is pretty much what Wi-Fi routers transmit adding 3 dB means doubling the power to 200 mW. Adding 10 dB to 100 mW increases the power for 10 times which makes it 1000 mW. </p><p>If you want to express power levels with decibels then you need to use dBm (usually stands for power in dBmW but it is used sometimes for dBmV as well) thus:</p><p>0 dBm = 1 mW, 10 dBm = 10 mW, 20 dBm = 100 mW, 30 dBm = 1000 mW</p><p>73 de Z35DM</p>
<p>this is amazing topic and I appreciate your effort .I got a <br> professional wifi antenna from chines store with very cheap price and <br>high gain , that is it : http://link.cashat.pro/158m5me</p>
<p>Omni-directional antennas have 0 dBi, by definition. 5 dBi means the beam narrows. However, MIMO (802.11n) handles the worst aspects of propagation: the bouncing around due to radio wave reflections off of walls and such. This antenna trick is only useful if you don't use 802.11n, or in rare circumstances. Still, I like the straw trick.</p>
<p>What About for a laptop?</p>
<p>WiFi adapters built into laptops are different. Unless you buy an external wireless adapter, 99.9% of all modern laptops have wifi adapters that come in the form of tiny (approximately) 1 inch x 1 inch circuit board that attaches to the motherboard of the laptop via a set of small gauge wires. There are used for data being relayed between the motherboard and the wifi adapter, Data is processed locally on the laptop and then hands the data to the adapter, which then encapsulates it in the form of packets that will be sent through the air through radio waves. </p><p>You'll notice that your computer does not have a visible antenna. This is because the antenna is built into edges of the plastic casing around your computer screen. Unless you know what you are looking for, it just looks like an ordinary set of wires. The only way that this method shown in the instructable will work is if you have a USB wireless adapter with a visible antenna. I say &quot;visible&quot; because a majority of adapters do not have an antenna sticking out of it. In my experience, most wifi adapters that I have worked with that have an antenna are the ones that advertise high gain, which is a not-so-fancy way of saying that it can transmit and receive at a greater distance than their flash drive sized counterparts. If you have bad reception everywhere you go, I would recommend finding out if there is any warranty and contacting the company, since that would indicate a faulty internal wireless adapter. If your connectivity is good in some areas and bad at others, you might want to try a external wifi (and also disable the internal adapter in the laptop). Regardless, always check with the manufacturer first.</p><p>If you computer is relatively new, I would recommend not opening to see for yourself as this will almost always result in you forfeiting any manufacturer warranty remaining on the computer. I need to add this part, since this site is all about making, repairing, tinkering, etc. I am an IT tech, so I know my way around computer components, but regardless, I do not open up computers that I think may have a faulty component and are still under warranty. This is because a manufacturer is not going to care how much you know about computers. As soon you open a computer, they will no longer support the product you purchased, even if it is a faulty component that just died and would normally be replaced by a manufacturer under &quot;normal&quot; circumstances. Not all companies are like this, but it is better to consult the company that manufactures your computer before open it up.</p>
Hi babblin I just took some copper red wire and soldered it on to my wifi antenna after stripping the antenna wire and added on 11 inches of wire on it and it worked like a chrm without the coil thanks!!!
Hi babblin I'm hacking my two netgear extender antenna. I'm reading your instruction but it 's not clear the total lenght of antenna? How many inch from the loops to the end?
Hi babblin I'm hacking my two netgear extender antenna. I'm reading your instruction but it 's not clear the total lenght of antenna? How many inch from the loops to the end?
Beth posted a question about adding windings and using bare wire <br> <br> Information: at this frequency subtle changes make big differences. <br>Also if using bare wire windings should not touch,the all windings make a coil and a coil is whats known as inductive. every winding alters frequency slightly. ( i use transformer wire which is coated with shellac or insulated wire) adding windings windings can be tricky without test equipment. As far as connection is concerned usually an cheap radioshack ohm meter will tell the story (should be zero ohms from connector to tip)
I am a kind of ignorant about this. <br>Can someone explain me what de 5 db gain means?
Wow, love the simplicity, great first :)
I did this hack, but it did not improve my signal at all. While I believe I applied each step correctly, I will detail the process below in case anyone can spot a problem. My only request is that you not post comments based on empty guesses when you haven't tried this hack yourself. EG &quot;Are you certain you used the correct COLOR screw&quot;? Thanks.. <br> <br>In the spirit of the hack, I used what was around my house. I had a roll of 20 gauge copper wire (bare), so that is what I used. After cutting the proper length, I used a 2 inch coarse thread drywall screw without any problem. I am crappy at soldering, so I used butt connectors designed for 18-22 gauge wire (red). I tested to be certain the antenna-to-wire connection was firm. Slipped on the straw cover and screwed antenna into router. Restarted router and refreshed wireless networks. Nothing, nada, zip. Still the same two bars I had before the hack. Because I had the same signal, I believe there is no break in the hack wiring or problem at the splice, or the signal should be worse. <br> <br>Did I miss something? Anyone else had this problem and solved it? Has anyone tried adding the extra 14 loops, and did that work? Other helpful suggestions? <br> <br>Beth
hi all before some time i took PCI WI Fi card with 2 antennas and the antennas are the same like on the video at the beginning so does this modified is going to improve the signal cause there is alot of Wi Fi signals but them are a with a little bit poor signal
WiFi Signal Amplifier Booster Manufacturers <br>http://www.powermicrowave.com/ <br>http://www.powermicrowave.com/en/4w-en.html <br>http://www.powermicrowave.com/2wen/2w-en.html
Hi, i thank you for the replys for the 3 links much apreciated, but it is to tecnical for me on those sites, but it still does not give me a simple answer to increse more turns on the copper wire, kind regards Brian
Antenna gain is proportional to the size of the antenna (antenna diameter as textbooks). Nothing to do with the number of turns. Turns can only play the role of impedance matching. If it is omni-directional antenna. Theory, the longer the higher the gain. Increase the gain omnidirectional antenna radiating elements need to increase the number. No one can simply give you a number of turns. Because do not have any effect.
Hi, i am from the UK, it has been asked before but can you increase the gain of the aerial, from 7 turns around the wood screw, then a small space then 14 turns then 28, Kind regards, from the UK brian-kn <br>
Thanks was looking for something so simple, but clear and effective as you have posted 100%full<br>
Anarky to answer your question.....It works very well!. My little girls computers are sharing a wireless internet connection. And their placement is a little lacking IE behind a couch...ever try to argue fashion versus function with a woman?....yah..<br><br>.Their wireless card has a similar antenna to the one on my old D-link so dust off yee ole G router and steal it's antenna.<br><br>well I didn't have any copper cable around until I remembered I was sitting on tons of coax.<br><br>So I stripped it out (use a pair of wire strippers or you will chop it in half) followed his directions to a T, minus i went with a paper-mate pen casing in stead of a straw, it is stronger and similar to the real casing comes in a variety of colors and has a cool pointy tip :).<br><br>with the old antenna I was getting a .85 megabit pull on speed test. with two little girls playing online Pokeman games sharing the same wireless it was bad. But add the antenna hack and it went up to 2.87 Megabits. to confirm this I put the old one back on and retested right back down to .85- .89<br><br>took me 5 minutes to make this thing (butane soldering iron is the bomb) <br><br>I cant thank him enough a nickle worth of old sat cable saved me 30 bucks and the headache from my girls &quot;daddy my internet sucks&quot; <br><br>Havent heard from them in days.<br><br>Now I will see if this ups my wireless bridge as well!!!!!!!! Burhahahahah cough cough <br><br>
can i use the 2.4GHz wifi antenna for my hspd dongle (for mobile frequency rang)
no, the HSPA (High Speed Packet Access) uses a different frequency to WiFi<br>wifi is 2.4-2.5Ghz, mobile network is 850, 900, 1800, 2100Mhz ~12.5CM is the band length of wifi, ~30cm is the wave length of 900Mhz band.. now for helix coil on that you need it to be a total of 1/4th the band with to do the right effect..<br><br>read both these if you want to melt your brain ;)<br><br>http://en.wikipedia.org/wiki/Helical_antenna<br><br>http://en.wikipedia.org/wiki/Dipole_antenna#Frequency_versus_length
I have a Q:<br><br>I have an old CB antennae that has been sitting around for like forever...would that work?? *evil grin*<br><br>I know that I would have to build a base for it &amp; all that, but if it'll work to REALLY pull in the net or whatever, then it will have some purpose.....otherwise its trash<br>
You would have to make sure the length of the antenna is correct for the resonant frequency (or part thereof). Most mobile type CB antennas range from 2-8.5 feet in length, which is the proper length for 1/4 to full wave resonance on the 11 meter 26.000 to 28.000 MHz CB band. As wifi broadcasts on 2.4 GHz the resonant length would be quite a bit shorter.
I'm totally ignorant about wifi (my caveat/confession): is the length of the antenna why my wifi connection keeps dropping in and out? I get it thru my cable company and it drives me crazy, especially when it drops out right in the middle of an instructable! It comes in thru our own router, and ever since getting the our own router is when the dropouts started. If amplifying the antenna will do the job, I'm all over it! Thanks for your help.
probably not, it's likely your router. Even if you get your wifi router from your company you can still connect a second wifi router and use that. I would recommend a WRT45GL by linksys with the tomato firmware installed. I have one and it works perfectly.
i place all my time and faith in a belkin wireless router. it is very well worth it. you dont need the all new one because older ones work perfectly. and you also dont need any software to be put on it to make it faster. although you can if you want to.
You were right: I called the nice people at Belkin (manufacturers of my router) and they talked me thru a re-conformation/reworking of my router and now, it works great! I don't know if we set it up wrong or what, but it hasn't dropped out even once since doing it. To be perfectly honest, I have NO IDEA what I did, but whatever it was, it fit the bill!

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