We decided to make an antenna for WiFi. .. There is a lot of options, network users are looking for new ways. Probably, because of the situations of life myriads, each solution is unable to lay out a network. We offer today to consider a couple of techniques to improve reception / transmission. Atypical solutions will be considered, the Kharchenko’s antenna design process has been described more than once. According to the designer, dated 70s of the last century, in a modernized version. Do you want to make a WiFi antenna yourself? Better read the review further! Let's get started
WiFi antenna gain increase
Using beer cans, assemble an MW reception band( omnipresent First Channel), an excellent reflector of arbitrary frequency. The parabolic surface is endowed with one interesting property:
Rays coming from any direction are reflected, collected by the focal plane. If you direct the product to the broadcast point, the lines will intersect in focus.
Internet was flooded with modifications of factory modems and antennas in order to gain additional gain. Not paying a penny. Methods of saving consider. Most external WiFi antennas are omnidirectional. In the factory modem antennas 2-3( often inside), can be divided as follows:
- The presence of an external / internal antenna.
- Multiple internal antennas.
- The presence of several outdoor antennas.
It is clear that most modems come as standard, the uninitiated ask: what does the number of antennas give? The answer is simple: better reception and transmission. The link adopted vertical polarization. The vector rotates, the signal disappears altogether. The case will fix the antenna with circular polarization, will take no worse, will not fall into dependence on the direction of the electric field.
Today, two surfaces are of interest:
- The paraboloid of rotation is obtained if the ordinary Y = X2 plot is rotated around the axis of symmetry( in this case, ordinates).Rays coming from the side of the concave part will be collected by the focal plane. Using the principle, satellite dishes work. If you take a ready-made, arbitrary radius, make something similar with your own hands from paper, epoxy resin, foil, you get a sensible device for enhancing reception.
- In the case of whip antennas, you can use the bend surface. The purchase sheet of thin steel is customized according to the pattern - let's talk below. The method is widely discussed by the Internet, a semicircle is used instead of a parabola, tin is taken from a beer can. The minus is visible: the two lines coincide approximately at the very beginning of the x-axis. Accurate focusing is not possible, gain decreases.
Let's see why the WiFi antenna starts to accept better if it is enclosed with a reflector. In the YouTube video, ValeraZik says: some pins, being covered from one side with a palm, are better received( any channel), part of the radiation is reflected by the hand. Not true. If you take the Kung Fu master( the path of the blocking fist), the hand will be like the steel, the right hand of other people, as well as Schuy, unable to reflect anything.
The hand extinguishes the radiation coming from other directions. Artificial interference, natural sources. As a result, the signal quality inexorably improves. Sometimes noticeable to the naked ear, in the case of long antennas may not play a role.
Represent the example of human hearing. Lor speaks quietly numbers, trying to hear, at the other end of the room constantly chatting. Suppose a partition separated itself from the noise, the wall of the sound isolator, of course, the necessary information will be perceived more clearly. If you replace your hand with a metal grounded screen, the situation will change completely. The wall reflects the excess waves back, the useful information will be concentrated at the desired point. Of course, if you choose the correct envelope.
Using a parabolic WiFi reception-transmission antenna
Occasionally, the points of broadcasting, reception in line of sight, are removed significantly. First, factory-made, home-made log-periodic antennas, wave channels will come in handy, and come ingeniously. WiFi on 5 GHz coincides with the frequency of the satellite broadcasting range C. There is a topic at forumru.tele-satinfo.ru/index.php?topic=70121.0, it is shown how to convert the converter from reception to signal transmission. Of course, the experiment is not for beginners, but, having received a successful alignment, we catch the space broadcast, the more we will accept from Earth.
Now let's remember that it is the C range that is less afraid of fogs, rain, and other whims of nature. Need to organize a bidirectional channel. There is much about the receiving part, it is written in detail here cqham.ru/ao40_equip.htm. It is proposed to subordinate the MMDS converters to catching targets( cable broadcasting on the air, there is no possibility to lay a network underground, on the surface).The difference with WiFi in the range is 100 MHz, the author of this link discusses how to properly convert MMDS converters to WiFi. In more detail, a slightly different problem is being solved, for our case the solution is good( in the review, the author tries to establish a connection on the WiFi frequency with the Amateur AO-40 satellite).
Bidirectional channel topic discussed. The transmission uses a helical antenna, the design of which( with their own hands) was discussed in the section. Equal to the nuances of the device pattern. From the text of the article shows: suitable for the purposes of receiving the factory plate. Suitable complementary functionality already standing( NTV +).We discussed how to properly adjust the equipment WiFi. Let us briefly recall that there is no need to touch the plate itself, simply, based on the laws of optics( the angle of incidence is equal to the angle of reflection), estimate where the WiFi modem and antenna will be at the point of the focal plane.
reflector A swarm of converters stuck to the multifeed, add a receiver there. The orbit is projected onto the focal plane along one large-diameter arc, the location of the best WiFi reception depends on the coordinates of the transmitter location, relative to the dish.
We understand that links to forums are unable to make a reliable source. First, readers can search with Yandex how to do the technological operations correctly, and second, they can ask the administrator to post a topic. Then we will do the work. We hope, readers understood, realized the possibility of using satellite equipment for terrestrial communications( MMDS).
Making a screen from a beer can for a WiFi antenna
Sometimes it’s not the best option to make an antenna for WiFi with your own hands, it is easier to convert an existing one. Consider a common case of limiting the area of broadcasting access point. If you cover some WiFi antennas with your hand, the reception quality will improve, you will not sit all year round! For those who want to solve the problem in the help we give the name of the program - Inssider. A signal level meter, with which you will find the best antenna, create a suitable screen, point the device in azimuth. Actually, start this, then build / buy.
ZikValera in the video shows a comparison of antennas, factory and own assembly. Wishing to spend 20 minutes to contemplate, send to watch, other things we bring: the directional biquadrat, undirected "clover" with versatile polarization shows better. You can evaluate the best factory model. But it's not about making a directional WiFi antenna. We want to show how to improve existing methods with simple methods.
How to make an antenna for WiFi yourself, modify it to improve the quality. Make a beer screen from the can, put the pin in focus. It is easier to do, lazily writing out the equation of an ellipse from analytical geometry, place the antenna in focus of the figure. ZikValera tried to do on the eye optically. I considered the focus to be the position at which the reflection of the antenna to the maximum “spreads” along the inside of the can. The authors led a scientific approach. We will add that in visual assessment one has to look from afar - in order for the rays of view to be parallel to each other - the wave front behaves in real reception. So you can make an omnidirectional WiFi antenna directional, at the same time raise the gain.
Any antediluvian equipment by a skillful approach turns to the right one. It is ridiculous to see landfills littered with frames of plastic windows. The picture shows the inability of society to fully utilize resources.