We here, the telecom ADSL is online, 900 yuan package year, not cheap; have friends hopes to share with me, why not. But he and my home window, the distance, more than 30 meters of the two buildings, because the cell is not checked, there is only a wireless Internet.
To the computer city, I wanted to buy a cheap TP-LINK wireless router, but I can't help the merchant's enthusiasm, just encountered the 54Mbps wireless router price reduction, so I spent 320 + 210 (NIC) I bought it back, I want to think TP-LINK's boxed outdoor 400 meters room 100 meters, I am better than it, the area is 30 meters, still not small.
Back to the family, the flush is installed. I found that there is no signal, the display data link is 0% very poor, the signal strength is 10% very poor, it is like a cold water to top, and the enthusiasm is full, the heart is cool!
This is just 30 meters plus two walls, there is no way to put my router on the window, the computer is also close to the window, I finally have a little signal, I can get online, but that speed is slow! And I can't always put my router in front of the window, I have to think about it to extend its antennas to the window.
what to do? Let the dog search, finally discovered that it is a good way to do a directional antenna; do it, do it, I have done two empty milk tanks. What to do? Very simple, look at the picture! One picture is a thousand words. Look at the picture, you know how to do it. Figure 1 is installed on the antenna
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Material: Antenna connector: 2 pair, this play is not good to buy, it is quite expensive, the price is 8 yuan, saying is gold-plated, still 5 yuan, spent 20 pieces.
Feeder: Dedicated high-frequency coaxial cable, this is not good, I have not bought it so far. Also expensive, online asked, actually 8 yuan / meter. No way, I have to replace the thin cable used by the network, but some netizens say that it will increase the high frequency loss. Therefore, the feeder should be as short as possible. Netizen's original words "," but as long as the loss is less than the air transmission loss in the room, then you still "make".
Empty tank: or other similar jars, there is anyone on the Internet to do with the easy pull can, but I think the reflection surface of the easy pull can be too small.
Wooden clothespins and brackets: I want to think!
Place: When the antenna is vertical, the radiation in the electromagnetic wave in the horizontal direction is the largest. Therefore, the two-day line should be placed in parallel, and it is horizontal and vertical.
Effect test: Figure 2 is a screenshot when the NIC antenna is not inserted into a milk tank
Figure 3 is a screenshot after the NIC is inserted into the milk tank and carefully adjusts the diaphragm.
It can be seen that the signal strength has increased by 40%. It's really immediate and stable. TX rate is stable at 36m, and you can watch movies directly online. However, when the router antenna here is also inserted into the milk tank, the signal strength does not increase significantly, and there is no effect in the direction of the two antenna. Do not know why? However, if the reflective surface of the two antenna is not aligned, the signal strength has dropped sharply.
It is worth mentioning that before this, we have tried the copper wire from the antenna to by about 1 meter to lead the window after 3 laps; also tried to take off the built-in closed circuit 75 Euro cable, will shield Set of about 30mm of the antenna, the other end out of the window; all received a better effect, can reach 50% when the signal strength is best, but it is not easy to adjust, the position and place of the antenna will affect; not good, 10 % Is not arriving, not stable. Of course, if there is a reader to save trouble, this is also a way.
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