Article Source: Personal Computer
Wireless brings us more convenient network connection, but wireless is still in use, and the transmission distance is one of them.
The theoretical transmission distance based on 2.4GHz 802.11b wireless protocol is about 100 meters, 300 meters outdoors. However, in practical applications, the coverage of wireless signals is more limited due to interference and object blocking, etc.. The state has certain restrictions on the transmit power of the wireless local area network equipment, so the manufacturer is not likely to provide better signal strength by increasing the transmit power of the device. If you want your wireless access point to override a broader area, or have a longer data transfer distance in a single direction, it is a good solution for the installation of additional antennas for wireless devices.
In the market we can buy an external antenna produced by wireless vendors, but its price is more expensive. I don't think this thing is worth a value? Then we do one, that is, save money and DIY fun, why not?
Although radio technology is very unfamiliar for many people, this time the 2.4GHz antenna does not require you to be proficient in wireless technology, in addition to the data we provide, you will use electric drill, scissors, and iron iron. It is enough to cope.
Making antenna with canned box - Preparation Tool
Workers must be a prostitute. The tools we need to prepare are: electric drills, saws, iron iron, files, sandpapers, and dry knives. If there is no electric drill and saw, it is also possible to work if you find a sharp big scissors; can be replaced with sandpaper, 200 or 400 mesh sandpaper can be used. Iron iron is probably an indispensable tool. If you don't want to automatically use it, it will usually provide welding service in places where selling wireless plugins, but hand-charged may be higher than your own accessories.
Making antenna with canned box - Prepare materials
Canned box
On this part, there is no strict specification requirement. Usually, try to use long and large metal cans. Before starting the transformation, it is best to tear off the above label and clean it, and we use a tinkklet with a Nestlé coffee.
Copper wire
Copper wire is used as antenna. Needless to have a lot, about 5 cm is enough. The copper wire we use is peeled out from 1 square single copper wire, which is just inserted into the joint.
Insulating tape
The canned box will be cut off in the production process of the antenna, even if it is used, after the sandpaper is polished, the fracture is very sharp. Use the insulating tape to wrap the can sharp edges to make your production process more secure.
Feeder
A 50-ornate connection is required between antenna and a wireless access point. According to the brand, the quality is different, the price of the feed is much different. Some of the more than 80 yuan, a general approximately 40 yuan, Beijing's words can find a lot of sales boots in the electronic market on the Sichun Road. If the distance between the antenna and the wireless device is far, it is best to buy a feeder of your point, and the signal loss will be dot. If you can't buy a feed, you can use 75 Euro TV with a shaft cable instead, and it can be used in the premise of distances.
Join
We use these devices to connect antenna with wireless devices. Various connections can be easily bought in the electronic market on the Sichun Road. It is best to pick a suitable joint on the antenna of the wireless router during purchase, or bring our magazine to the map.
Thermal casing
The use of heat shrinkable tubes to handle the joints of the feeder and the connecting element will be more beautiful and firm, and there is no need to do it.
Making antenna with canned box - Steps
Determine the length of the canned box to be truncated according to the calculation formula, and the position of the hole is required to mount the receiving element. We use the canned box diameter of 125mm, which requires a 108mm tank when making antenna, and the opening position is 39 mm from the bottom of the can. For details, please refer to our website.
Use the hand saw to truncate the length of the length as needed. A suitable hole is used in the marked position. When this operation is performed, it is best to make a prototype with a nail because the high-speed rotating electric rotation is easily slippered in a smooth canned surface. If you don't get it, just turn the can cart box, then you can come again. When we use, we use a 10mm drill bit.
After preliminary completion of the processing of the can, it is necessary to use sandpaper and files to further process. First, the cutting surface of the can is smooth, so that the metal thorn will cause damage to your hand in subsequent production. The borehole is further expanded using a file to make the size of the connector having a tank need to be mounted. Then, the paint surrounded by the drill was then hit to ensure that the connectors were in contact with the tank.
We need a little processing on the connection components that buy back. As long as the metal protrusions of the connectors in the figure can be sawn, then the jack is smoothly smoothed.
The connectors are separated and the copper wire is inserted into the figure shown in the figure. In order to avoid contact with the outer casing, you can wrap a transparent strip on the copper wire. The length of the copper wire exposed to expose the connector is measured, reserved 30mm and intercept the extra part, so that the copper wire is kept vertically. The nuts comes with the connector are fixed onto the tank, and the can body is careful. In this step, our canned antennas have been completed.
Next we want to make a cable between the antenna and the wireless router. The feeder and the connector can be fixed by welding or pressing. For high frequency signal transmission, it is best to use solder points in the connection portion. When intercepting the feeder of the required length, the feeder is fixed to the connector. Although there are many types of connections, in general, the connecting member housing is connected to the feeder metal mesh shielding layer, and the copper tube inside the connector is connected to the metal wire of the feeder axis.
Connect the antenna to the wireless broadband router, put this homemade antenna on a stack, or if there is condition, put it on the small camera tripod. One end of the antenna opens is rushed to the direction of the broadcast signal and tried to rotate the can cart in the direction of the vertical axis to find the strongest signal. Simplete antenna
If you don't want to compete for the signal strength of the wireless router, there is another simple method than the antenna we have made than the antenna we have made.
Tools and materials
Since it is a simple antenna, then the tools and materials we need are also available. It only needs one tank and a scissors.
Step
In order to make the machining more convenient, it is best to find an aluminum mask. First, the longitudinal direction of the easy pull can be thrown, the proportion is approximately 2: 1, and it is not necessary to very accurate.
It will be easy to pull, and the bottom is cut about 1 cm and then the wall is discovered. In order to ensure the safety of your fingers, you'd better use the pliers and wear the thick gloves. If you feel that the edge is still too sharp, then you will wrap the edge with the tape.
Playing a hole in the volatile can, do not close too close to the canal. This operation can be accomplished with nails and scissors. If you are in trouble, you will use the opening of the tank top.
Find a cardboard, cut a semi-circle according to the diameter of the easy pull, and then punched with the same position as the bottom.
Fixed the sleeper with tape in the semi-pulp, which can be almost almost like your wireless router antenna. At this point, this super simple antenna can be set on the antenna of the wireless router, and the cross section of the easy-pull can be turned to the direction you need. The most simple antenna
If you still don't want to have a big way for an antenna, then there is a super simple method. The tank antenna is the use of a metal tank to enhance the signal strength on the wireless reflection, as long as it is metal, it can be used to make such antennas.
Tools and materials
There is a food insurance aluminum foil in the mall. This is very useful, insurance, barbecue is used, buy a volume, only 15. If you don't even buy this, then there is really no way. In addition, it is necessary to prepare a sharp artifact.
Step
In accordance with the length of the antenna, add 10 cm and cut a piece of aluminum foil. Try to keep the aluminum foil flat.
Roll the decanted aluminum foil into a semi-cylinder, it is best to find a cylindrical body as a reference, such as a can. Then seal both ends.
The works of the semi-cylindrical sleeves are on the antennas, and the opening will enhance the direction of the wireless signal. Is it simple enough? But don't sway it when you use it. Test effect
We use an ORINOCO 802.11b silver card, Jingdong A1500 notebook, Buffalo WBR2-G54S broadband router tests the produced antenna. Choosing the ORINOCO network is because its feature-rich software can provide immediate signal strength detection.
All three antennas we have enhance the wireless signal strength in a specific direction. In the test, we chose two directions in the office environment. These two directions have glass doors, cement walls, and plaster walls to block signal transmission. The signal when using the original antenna is 26 and 13dB. According to the signal strength displayed by the ORINOCO NIC software, these three antennas can be used in order to enhance the wireless signal strength, and the effect is best or the antenna created using the iron barrel. The effect of the easy pull can antenna and the aluminum foil antenna is similar, but the aluminum foil paper is too easily deformed, and the signal strength after the shape changes will vary.
Test effect of iron tube antenna
Test effect of easy pull can antennas
Test effect of aluminum foil antenna
How to use a hot shrinkable sleeve
The heat shrink sleeve has a different caliber. It is best to bring the feed line and the joint when buying. Before installing the joint, the appropriate length of the heat shrinkable tube is first passed onto the feeder. When the finished joint is installed, the feeder and connectors are packaged using a heat shrink sleeve, and the lighter is uniformly heated on the heat shrinkable sleeve. It is not necessary to bake, as long as the heat shrink sleeve is heat it. The heat of the heating casing can be packed very closely.
What should I do without can?
Types of tinches are sometimes not very easy to find, we can also replace it with a common paper tea cartridge, which is more convenient when processing. This way you don't have to use electric drills and saws, and a sharp point of the big scissors is enough to cope. Some additional processing is required before using the paper tube as antenna. Some tea cylinders do not have aluminum foil as a shield, which requires us to post a layer, and the aluminum foil packaging paper for the home kitchen. First, according to the previous steps, the paper cartridge is preliminary, after cutting, punching, using aluminum foil paper in the paper tube outside the paper tube. It should be noted that it must not be too hard when the antenna joint is fixed, so as not to break the aluminum foil.
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