Homemade Wi-Fi antenna

Wi-Fi network configuration demonstrates quite a lot of nuances. Faced trying to share the Internet home users. One computer is connected to the provider through the cable. The access point mode is created, the security protocol and password are selected. Home users use the Internet in parallel. The technique rests on the horn, thanks to the provider using a private line. The exit is. Obstacles between people and high-speed Internet are powerless to prevent a homemade Wi-Fi antenna from improving the reception and transmission of a signal, and the communication range and speed naturally increase.

Appointment of self-made antennas Wi-Fi

Antennas adorn many devices. We list:

  1. Tablet.
  2. IPhone.
  3. Laptops.
  4. Wi-Fi Modems.
  5. Wi-Fi routers, access points.
  6. Cellular towers.

Homemade antenna for Wi-Fi adapter will expand the capabilities of electronics. The access point is characterized by the ability to transmit a signal omnidirectionally. Power is spreading, filling the azimuths. Complementing the access point with a special external purchased, self-made antenna, can give directional properties to radiation. Increases the range of confident reception on the selected azimuth.

Take a while to break smartphones by connecting an external antenna, assemble your own for an access point. Most of the antennas sold by stores have a circular pattern, they radiate equally, omnidirectionally, dividing the power in azimuths.

Powerful home-made Wi-Fi antennas have a much smaller viewing area, will provide in some cases a more confident reception. Equipped with a reflector device equipped with a radiation pattern, equipped with a single central lobe. Reflector remove - get eight. In the plane of the radiator location there will be a dead zone, there is no signal. It is unable to receive a homemade antenna for a Wi-Fi router from the direction. The setup of the access point is as follows:

  1. The device is connected to a computer( power supply).
  2. Channel is selected.
  3. Tune to full power.
  4. Selects the protocol type.
  5. Set the password, the network name.

Peoples are satisfied with the new accessible point. Let's take a closer look at the process, wait a little while for the soldering iron, pliers. Like a transmitter, an electronic device, an antenna, a router have a certain peak of possibilities in the middle of a range. For example, 2.4 GHz often has 14 channels. The power of the transmitted signal is higher in the middle, for example, the sixth channel. Although each line occupies 22 MHz in the spectrum, the measurement is carried out at the field level of 0.707( √2 / 2) maximum in both sides of the carrier frequency.

For reference. Determined by the type of modulation, sometimes there is only a pilot signal, one band. Rectangular pulses, computer signals are just such, have a pronounced maximum, a bunch of side lobes. As a result, the width of the spectrum of a real signal is equal to infinity. Limited by the cyclic voltage band, to which the process emitted by the Wi-Fi protocol is not closely related.

However, the power of side lobes is so small that the engineers simply neglect. Neighboring channels parasitic energy can carry serious problems. According to the expert, if there are two busy channels, 1st and 11th, when the access point is placed on the 6th, the speed drop is 70%.Erroneous, missed packets are re-transmitted, similar in practice may occur. Neighboring access points interfere, the best option is to broadcast on the same frequency when the speed drops by half. Broadband omni-directional antennas. Instead of giving the useful power to consumers, we dissipate it to the air, to our neighbors.

Self-made omnidirectional Wi-Fi antenna is not the best option. Nothing will change. Self-made directional antenna Wi-Fi is better, we will make of wire, foil textolite, copper tube. Sensitive such. Transmitted, received power is concentrated in a narrow sector. Will improve the quality of transmission, thoughtfully arranging users, access point. How important the arrangement is, judge by one curious case:

  • Office summoned the master. They said: in the period 12.00 - 14.00, the access point collapses. The technician took out a special device for estimating the occupied frequencies, began a study. Such programs are provided by Android OS smartphones. Use by selecting a channel before installation. Conduct research throughout the day for several days in a row, avoiding the incident. We bring the discovered master: the next office, separated by a wall, painted a lunch. Alternately, employees used a microwave( using a 2.4 GHz frequency).Poor insulation of household appliances, the lack of grounding allowed the radiation to expose a narrow-band interference at the frequency of the magnetron. The solution was simple: the access point was moved to the opposite end of the office.

Have at hand the simplest homemade Wi-Fi antenna from a beer can with a reflector, the characters might not know that in the neighborhood is a powerful source of harmful radiation. Reflector gives the access point directionality, extinguish the radiation coming from behind the wall. Another plus directional antennas, which today will do with their own hands. By the way, buying a microwave, try to determine security. It is necessary to turn on the device in a grounded outlet, put a cell phone in the working compartment, close the door, dial the number. The signal passes - the harmful radiation of the magnetron will come out. Avoid sitting next to each other. We will discuss how to make a homemade Wi-Fi antenna.

DIY Directional Wi-Fi Antenna

Need tools:

  1. Soldering iron( solder, rosin, stand).
  2. Pliers.
  3. Flat small screwdriver.
  4. Caliper, ruler.
  5. Drill with a drill under the copper tube.

Materials required:

  1. A piece of foil double-sided PCB as a reflector.
  2. Copper wire with a diameter of 1.2 mm and a length of 30 cm( only 26 cm of them will be needed).
  3. The RC-50 cable is not too long so as not to damp the signal.
  4. A piece of copper tube with a length of 10 cm so that the RC-50 cable passes inside.

Let's start with a copper tube. We cut one end to 1.5 mm, removing two thirds of the wall. The antenna will be soldered to the remaining piece. We create a biquadratic loop with a side of 30.5 mm. The size is selected from the condition of setting the 2.4 GHz band.

Similarly, you can make any antenna signal of horizontal or vertical polarization. Including television. A homemade Wi-Fi antenna for a tablet, phone, or modem will do. If you know where to connect.

Note, the side of the squares is given over the middle wire section. Between the nearest edges will be 30.5 - 1.2 = 29.3 mm. You can adopt. Bend we begin by finding the middle. Use the edge of the ruler support, determine the state when the segment starts to balance. We make a bend at 90 degrees, this will be the point where the central core of the RK-50 will connect. We are bending the wire, getting a "square eight", both ends should be strictly symmetrical to return. Crop, a couple of millimeters short of the initial bend. Ludim ends, put the eight aside.

Mark up the PCB center, drill a hole to barely enter the copper tube. Ludim both sides. We take the copper tube, we tin the outer edge of the thin wall left by the first stage. The eight is 1.5 cm away from the reflector. We’ve loosened the tube in a circle, with a rim at a specified distance from the edge( excluding the thin wall).Solder the tube to the board, preferably at a 90 degree angle. We put both ends of the figure eight on a thin wall so that the initial bend does not touch the tube. Orient the eights parallel to the larger side of the PCB at a distance of 1.5 cm. The reflector is now grounded.

The RK-50 cable is pulled inward, the screen is planted on a copper tube, the core is on the initial eight bend. At the opposite end we mount the connector, simply solder the cut to the desired contacts of the modem, phone, any other device. Begin the test. Eight must be installed vertically for horizontal polarization. If it works, we find a silicone sealant that is not afraid of frost, precipitation, fill the place where the cable exits the antenna with a good layer. After solidification, the antenna will successfully withstand rain.

If we replace the wire with a thick wire PV1 of a sufficiently large cross section( 2.5 mm2), we will strip the sheath at the point of initial bending and at the ends. Homemade Wi-Fi antenna for a laptop will be weatherproof. Today produce shrink materials. The heated film tightly wraps the product, protecting it from the vagaries of bad weather.

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