isotropic antenna

two. In addition, a lot of home appliances in the work of the wireless network will also cause electromagnetic interference, so the placement of wireless routers should also try to stay away from these appliances. 　Third, extended antenna enhancement signal Because the size of the antenna gain directly affects the signal emission intensity and the ability to receive, and some of the routers

network. For this reason, before placing wireless internet nodes or wireless router devices, we should make a rough estimate of the number of users of wireless Internet access, and ensure that many wireless internet users can be evenly connected to different wireless access devices. Make sure each one of them is able to surf the internet efficiently and wirelessly. focus on the antenna position under normal circumstances, wireless internet nodes

is very low, it may take more than 10 times times the weight. 18650 the other advantage of the battery is a lot of kinds, for example, when you need to the cold area, you can change the low-temperature battery, you can work in the 零下40度 environment. Instead of Conte like the iphone, it's completely impossible to use. ) 2, the mobile phone's GPS performance should be good enough, have a separate external GPS antenna, so that in the woods and heavy ra

The construction of 3G mobile network is a complex project, considering all kinds of factors, also need to deal with the emerging problems, so technology and experience are equally important. Alcatel Shanghai Bell by virtue of its strong in the field of telecommunications research and development strength and accumulated many years of experience in the field, will be in the future 3G network construction to assist operators to complete the construction goals, and jointly create a new phase of mo

The development and prosperity of wireless networks are inseparable from the construction of networks. However, problems such as poor planning or adaptability to the current environment may also occur during the construction process. Then we need to optimize the network. Next we will introduce the optimization of CDMA wireless networks. The CDMA system needs to be gradually expanded and optimized during the operation process, and most of the problems in the mobile communication network are unpre

Source: CCID In most cases, frequent wireless connection disconnection is caused by improper use. It is usually manifested in faults such as weak wireless signal, difficult connection, slow communication speed, and disconnection. The reason is generally caused by the following factors. 1. Human Factors The distance between the wireless router and the network card is too long. In this case, you can only configure an appropriate antenna. There are obsta

port of the wireless routing product. For network products in long-term working conditions, the advantages and disadvantages of the Heat Dissipation Capacity will directly affect the product stability and service life, so by carefully observing the shell material, heat sink port and volume, we will probably get some information about the product's heat dissipation performance. Of course, this is also one of the best methods to detect wireless routing products before purchase. 3. view the

Day-feed coverage, as the name implies is the use of AP, feeder, plus ceiling antenna to build wireless network. thereby reducing the use of APS to reduce the interference of the same frequency.Working principle:Day-feed coverage using APS are high-power industrial wireless APs, power is the general home wireless router 7-8 times, is the general ceiling-type AP 5-6 times, high-power is to ensure the basic coverage effect. The greater the power, the be

fragile paper. 14. Fixed speaker Structure The volume of a mobile phone is a strong selling point, which puts forward higher requirements for the speaker. in addition to requiring the solution company to tone the speaker itself to the best state, the speaker's sound cavity structure should also pay attention to the following points: A. the front sound of the speaker must be closed. if the horn works directly with the shell, the ring foam must be closed between the horn and the shell, and the

performance a Wi-Fi system can achieve. The higher the SINR value, the higher the data transfer rate, and the greater the spectral capacity.　　 Figure: SINR is an important indicator for determining the performance of Wi-Fi systemsIn order to obtain a higher SINR indicator, Wi-Fi systems must be achieved by increasing signal gain or reducing interference. The problem is that traditional Wi-Fi systems can only increase the signal strength in a direction by increasing power or by erecting hi

difference between the level of signal and the level of interference. Because it reflects the negative impact of RF interference on user throughput, SINR is a better indicator of what performance a Wi-Fi system can achieve. The higher the SINR value, the higher the data transfer rate, and the greater the spectral capacity.　　 Figure: SINR is an important indicator for determining the performance of Wi-Fi systemsIn order to obtain a higher SINR indicator, Wi-Fi systems must be achieved by i

Shared Library) 11. Run install_software: #./install_software, enter Y twice as prompted, modify makefile. config, and modify a set of parameters in Makefile. config in/opt/gamit/libraries. (1) MAXSIT 55, MAXSAT 32, MAXATM 25, and MAXEPC 5760 (2) # Specific to FC5 (F6, F7, F8) Then, enter "Y" twice to complete the installation; 12. After installation, open the terminal and enter doy to check whether the program is correctly installed. (Note: After the installation is completed under the root us

MIMO technology can be used as a bridge to connect old and new wireless technologies, so that the two can develop and integrate harmoniously. So it is already an important technology in the next generation of wireless broadband mobile communication systems. The following will give you an in-depth analysis of its development. MIMO technology has become one of the key technologies in the wireless communication field. However, it is a huge challenge in the industry to reduce the algorithm complexit

the body (MINI-PCI or mini pci-Express) and a preset antenna. In this way, you only need to purchase the wireless network card of the corresponding interface and connect the antenna. If you have an expansion slot (MINI-PCI or mini pci-Express) that is not cabled, you can also install and use the antenna after purchasing it. There are two types of expansion slots

In most home environments, only one router is used for wireless network coverage, a single wireless router has limited coverage, and wireless signals in some areas may be weak or cannot be found. This article describes how to enhance the coverage effect of a single wireless router. If the housing space is not open enough, there are partitions, walls and other obstacles, will lead to wireless signal penetration attenuation is too large, the scope of the coverage is gre

will also increase. Currently the international regulation of the maximum launch power of 20DBM (or 100MW), but now the market most of the products are not up to this value, we are in the choice of course the closer the better. Wireless Router selection standard 3, antenna gain Wireless products are mostly antennas, this antenna can be good or bad for wireless products have a direct impact on the selecti

ordinary users 54M products can fully meet the needs of the Internet. 2. Transmitting power: We know that the unit of measure of power is watt. In the same way, wireless devices also use transmitting power to measure the performance of the transmitter. The unit of measurement for transmitting power is dbm or MW. Like the relationship between the brightness and wattage of a light bulb, the transmission distance of the wireless device is also connected with the transmit power. With the increase

Today's home routers usually bring a few antennas, long, the appearance is not good-looking, but most users like, think has the antenna router launch out of the signal will be very good, even in the home more remote corner, mobile phone show WiFi signal is also full, that is to wear a wall effect is very good, is this? The first thing we need to sort out is the weak WiFi signal for routers and mobile phones. Because the mobile phone's main function

different periods. 2. 3G Wireless network optimization process From the experience of domestic CDMA network optimization and the experience of 3G operation in foreign countries, the optimization process of 3G network can be started from following several stages. (1) Verification A Verify all information related to wireless in the database: including site coordinates, structure type, antenna position, antenna