How to make the wireless route signal stronger and wider (1)

I. Questions about enhancing wireless signals

As you know, wireless signal loss may occur due to transmission distance, media, or other factors, shortening the transmission distance and reducing the transmission speed. Therefore, to improve the wireless transmission performance and improve the wireless routing signal, you can start from the following aspects.

◆ High-gain antenna preferred

Both wired and wireless networks have signal attenuation. Compared with wired networks, wireless LAN technology is more affected by the environment due to air transmission, as the distance increases or encounters obstacles, the signal will decrease, so that the actual transmission distance may not reach the maximum limit, especially when there are many indoor obstacles and frequent use of electrical equipment, this will greatly shorten the wireless transmission distance.

High-gain oriented antenna doubles the wireless transmission distance

In addition, the general range of coverage of wireless networks depends on whether the environment is open or not. Without an external antenna, a maximum of-meters can be transmitted outdoors, if you are in the room, it would be good to reach 30-50 meters. Of course, if you want to make the wireless route signal more powerful, pass farther, and connect more smoothly, the best way is to add a high-gain antenna, and its transmission distance can naturally be further reached.

Why does a high-gain antenna allow wireless devices to pass further? As we all know, the antenna gain refers to the ratio of the power density of the signal generated by the actual antenna and the ideal radiation unit at the same point in space under the same input power conditions. The larger the dBi value of the antenna, the higher the gain, the more sharp the beam, and the longer the transmission distance.

Therefore, the high-gain antenna has become an important method to improve the transmit distance of wireless devices. Although the gain cannot increase the signal strength of the transmitter, it can be re-oriented. As the gain increases, the angle coverage will be reduced in inverse proportion, and the transmission distance will be further and further.

In addition, some users are worried that using a high-gain antenna will affect the health of the human body. Certainly not, because the antenna for long-distance transmission only increases the signal gain, and does not increase the transmit power of the Wireless AP or wireless router, it will not affect human health. In addition, there are strict rules on the transmit power of wireless networks, which are much weaker than ordinary mobile phones. The transmit power of wireless networks is about 60-70 mW, while that of mobile phones is about mW, in addition, wireless devices are not directly used as mobile phones.

◆ Placement is important

Wireless devices have high requirements on the environment, because each time a wireless signal encounters an obstacle, its signal will be weakened, especially for metal objects or concrete walls.

To properly place the wireless signal, you need to know which factors have a greater impact on the wireless signal. First, the interior walls are the main obstacle, while the reinforced concrete walls are the enemy of wireless signal transmission. It is estimated that the received signal will be 4 dB after a plank, 8-15 dB after a brick wall, and 15-30 dB after a reinforced concrete wall. This is why a wireless router can pass through three brick walls and cannot pass through a reinforced concrete wall, because the latter can almost completely absorb the energy of electromagnetic waves.

Second, 2 to 4 GHz devices in the same frequency band as 802.11b/g, such as wireless cameras, microwave ovens, Bluetooth, cordless phones, and refrigerators, will also affect the normal transmission of wireless signals. In addition, if the surrounding area has a strong magnetic field, radio transmitting Tower, electric welder, tram or high-voltage power transformer signal sources, it may also produce strong interference to wireless signals or equipment. In addition, many friends will find that wireless signals are transmitted outdoors, and the attenuation of wireless signals may be very large in the rainy days or cloudy days. When the sky is clear, the distance between wireless signal transmission will be a huge step forward.

To achieve the best speed, the wireless network should be placed directly with the naked eye, and the product speed should be consistent.

We cannot change the weather, but other factors can be overcome by putting wireless devices properly. First, the wireless router should be placed in the center as much as possible, and avoid reinforced concrete walls (bearing walls) as much as possible, as well as try to stay away from interference devices at the same frequency. Second, wireless devices should be placed as close as possible. The closer the wireless devices are, the stronger the wireless signal, the smaller the interference, and the higher the data transmission rate. Of course, for wireless devices installed with outdoor antennas, lightning protection equipment must be added between the antenna and Wireless AP. For oriented antennas, pay attention to the orientation of the front of the antenna towards the remote site. The antennas should be installed at the highest possible position, the antennas and sites should be invisible to the naked eye if possible.