Homemade tablet Wi-Fi antenna. The tablet has poor WiFi reception

The tests involved a 10* AInol tablet
Denis and Alexander
The goal is to achieve the best Wi-fi reception on Chinese tablet replacing the standard factory receiver antenna with a homemade one Kharchenko antenna, and also on a 5Dbi antenna from the Netis router. See what happened in the video!

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All modern tablets and smartphones have built-in GPS, but they cannot be compared with full-fledged navigators. Gadgets cannot always pick up satellites in difficult reception conditions. This happens under different conditions:

• The windows in the car are covered with a special coating, which impairs signal reception.
• The tablet cannot be placed under the windshield.
• Limited visibility – this applies to special equipment.

But there is a simple way to bring your tablet as close as possible to a full-fledged navigator - install an external GPS antenna. Some motorists turn to service centers, but why pay if you can do the work yourself.

Reference! The external antenna is housed in a compact box, the size of which usually does not exceed half a matchbox. A shielded cable comes out of the box; its length depends on the model, but usually the cable is 3-3.5 meters. A special connector located at the end of the cable is connected to the signal receivers, in our case, to the tablet. The antenna can also be connected to a smartphone or computer.

Installation process

When choosing an antenna, you need to explain to the seller what device the amplifier will be used for GPS signal. Modern models can be connected not only via USB, but also via Bluetooth. And now to the connection:

1. The ideal solution for your smartphone would be a GPS antenna that connects to the device via Bluetooth. All data will be transmitted via the protocol. The advantage is that you won't need any additional connectors or modification.
2. Due to the fact that the tablet already has a navigation application, you do not have to make new settings.
3. Also external receiver may have a USB/PS2 connector. This interface is usually used personal computers, laptops, but there are exceptions. As in the first case, you only need to connect the antenna to the device.

Rarely, but there are tablet models where there is no USB input. In this case, it is worth purchasing an external GPS bluetooth antenna. Increased efficiency Such an antenna can be explained by the presence of an autonomous power source. It is also important to secure it correctly. Some motorists take it to the roof, others attach the modifier under the glass. In any case, with external GPS With an antenna, your tablet will work no worse than a separate navigator for a car.

After a fall or repair, it became difficult to receive wifi on your tablet? This article is for you if you want to try to cure your favorite device yourself.

I had such a case - http://www.rf-cheats.ru/forum/showthread.php?t=270623
The tablet fell, the screen cracked, I took it to a service center and they replaced the touchscreen. Overall a classic. After the replacement, I began to notice that wifi reception became worse than ever. By the way, I had my repairs done at the office WESTER-LAB(wester-lab.ru). Let it be anti-advertising.
My friends assured me that when replacing the touchscreen it is unlikely to somehow damage the wifi antenna. Having called the same service (and I have a guarantee!), I was told similar things, that their hut is on the right, that I mixed something up, that it was a coincidence, or that I was even trying to deceive them. Fortunately, I have a friend - really, an engineer from God. Can fix anything. What’s typical is that these are the kind of people who don’t work in such small services. Well, let's not talk about that.

So, the hardest part was how to remove the glass. There are simply tons of video guides on this point. We take a narrow knife and, starting from the right side of the tablet, pry up the glass, tearing it off the double-sided tape. Before doing this, you should run a hairdryer along the edges of the tablet. After removing the touchscreen, it can be tilted to the left. For convenience, it would be nice to fold the display there as well. To do this, you need to disconnect the cable from the board at location number 1:

Under number 2 we see a protruding antenna, which was held on by three screws, which in turn we had already unscrewed. Taking a closer look at the antenna, we immediately understand what the matter is:

4. the antenna itself
3. the place to which it is attached
2-1. holes through which the antenna is pressed to the body with screws.
The naked eye can see that the antenna is torn at the mounting points. Apparently it was glued (or stuck) to the back of the display. And at the moment of changing the touchscreen, the antenna was torn out of its fasteners.
The important point here is the lowest hole in the antenna, which looks more like a stub:

It, unlike the other two, is conductive. Thus, the tablet body is a mass for the antenna, subject to tight contact. Of course, when the antenna is torn and practically does not press against the body, we have what we have. What did my friend decide to do?
I took a piece of fiberglass, cut a strip from it and removed the copper layer from it:

Of course, on top it is also covered with a dielectric, which was also removed. Next, I cut off a small part from this strip and soldered it to the antenna in the place where it should be attached to the body. Having attached the antenna with two screws, we got this picture:

1. Attached antenna
2. A piece soldered to the antenna, directly under which there is a hole for a screw.
We make a hole with an awl, insert a screw and tighten it.
Voila!

I already forgot when I caught the tablet at full capacity.
The service would give you a wifi module along with an antenna. Let me summarize - after all, such things should be done either through helpful acquaintances or from officials. Street offices will make a touchscreen, Wi-Fi will fall off. They turn on Wi-Fi and the sound disappears. Why do you need this swing?

Articles and Lifehacks

To strengthen the signal that is lacking in the entire large house and increase the range Wi-Fi work, is made from a regular CD box. Although electronic equipment Nowadays it’s at its best, and the words “router” and “Wi-Fi” won’t surprise anyone; homemade craftsmen are constantly trying to come up with something of their own.

How to make a wifi antenna for a tablet computer with your own hands?

1. You need to take a standard plastic box designed for 25 discs.

2. At a distance of approximately 18 mm, you need to cut off the spindle and, using a file (or a round needle file), make slots on it in order to then attach the double diamond.

3. Then you need to make a double diamond from a copper cable with a diameter of 2.5 mm. To do this you will need about 30 cm of copper wire. You need to bend a rhombus from a stripped piece of wire, strictly maintaining the size from its middle to the middle of approximately 30 millimeters. The result is double square with the same dimensions. The ends of the wire should be soldered and tinned, preparing the place for the planned cable connection.

5. Then, using a soldering iron, you need to solder the cable, and to the bottom of the box with regular glue (glue gun) you need to attach a CD disk designed to reflect the signal.

6. In addition, you need to fix the double square on the spindle (using a glue gun), and secure the cable with reverse side boxes. DIY Wifi antenna for tablet is ready.

7. The final step is to connect the manufactured structure to a wifi router.

Features of making your own wifi antenna for a tablet

The main requirement for the manufacture of such an antenna is that the distance between the reflective layer and the copper wires must be strictly maintained and be 15 mm.

Experienced specialists or self-confident craftsmen can unsolder the factory antenna and carefully attach a homemade one in its place. The procedure must be carried out carefully so that thin conductors do not peel off from the board when high temperature. The power of such a seemingly simple design will surprise any user no less than that of Wacom.

It is necessary to pay attention that the copper wires should not touch each other when crossing each other. To avoid oxidation, the manufactured structure must be varnished. Having assembled the antenna with your own hands, you need to tune it to the signal source according to best quality and range of transmitted data. It is, of course, easier to set up using microwave measuring devices.

Therefore, in this review I will minimally touch on the adapter itself, and will talk about improving the performance of a 10" tablet Zenithink ZT-280 C91 by replacing the standard WiFi module with this one.
Review contains detailed instructions with photos " close-up"the whole process...
Let's start with the background. After purchasing the above tablet PC, it turned out that stable reception WiFi networks practically none, because in the immediate vicinity of the access point, the signal strength icon showed only one stick, while all other devices showed excellent reception. Next, this problem was studied by reading various thematic forums and reviews of the specified “tablet”. It turned out that this property is inherent in all “tablets” of this model and there are several ways to solve the issue. But first, the “tablet” needs to be disassembled. How to do this is described in detail. Below is a photo of the “device” with the back cover removed: Built-in WiFi module located in the lower right corner of the board:
So, the “tablet” has been disassembled, the module has been found, and let’s begin to improve reception.
First way- the simplest: modernization of the transceiver WiFi antennas by soldering a piece of foil fiberglass laminate to it (taken): They write that it helps, but in this particular case the difference is WiFi reception no signal detected.
Second way- replacing the WiFi module. This path is also described in detail. Not all are suitable for replacement WiFi adapters which ones are suitable were discussed. There is also a link to the module under review, only for DX, but it is slightly more expensive there, so it was ordered for TD.
A few photos of the received adapter: To connect it was used standard USB"lace" on back PC cases: Only he had to modify it a little: Modified crime scene:
Next, carefully unsolder the standard module:
Solder the “modified USB cord”: Because The standard WiFi module has a 3.3 volt power supply, and the one received from TD has 5 volt power, then in place of the standard one we solder only ground, D+ and D-, we take +5 volts from the USB connector: The new module, together with the “modified cord,” is precisely placed between the battery and the board of the “tablet”: That's what came out of it:
When finishing the work we put back cover in place, turn on the “tablet” and check the reception quality.
This method helped the tablet user. The reception level has become the same as that of other devices.
Thus, I can recommend the reviewed adapter for purchase, due to good characteristics and small sizes, allowing you to “shove” it even into the case of a “tablet”.