The technology of Wi-Fi connections are becoming popular and in demand among different categories of consumers. Modern brand TVs, tablets and smartphones support access to wireless Internet.
Content:
- How does Wi-Fi adapter
- Types of Wi-Fi adapters
- How to choose a Wi-Fi adapter
- Blitz-tips
How does Wi-Fi adapter
Wi-Fi adapters are special devices that are used to connect to a wireless the established network frequency band through the broadband radio type, for receiving and transmitting packet data.
Devices used for receiving and transmitting a signal through a wireless network devices, in which It does not provide Wi-Fi function. Some models are configured only on the signal reception, the other - on the reception and transmission.
For signal transmission, they can be equipped with an external antenna circular type. To extend the range of Wi-Fi adapter, install additional omnidirectional antenna action.
For correct digitization of radio waves through the adapter uses special software - drivers that are installed on a stationary PC, laptop, tablet or TV.
Types of Wi-Fi adapters
Modern network adapters are available in three types: external, embedded and card. Each of them is characterized by technical parameters and functional features.
external
Such devices are structurally similar to a standard USB - drive, it is ergonomic, reliable and easy to operate. External modules are connected to the system unit, a laptop or tablet via a USB port or cable.
To get started, it must be inserted into a free port, and connect to a wireless connection. Devices of this type provide low data rate transmission the Internet, which is compensated by an acceptable cost. They have no obvious defects, so they are most in demand.
Built-in (internal)
Built-in adapters are designed to connect to the motherboard, so installation requires skill and some experience in disassembling the equipment.
Have high bandwidth, ensuring reliable network connectivity and high speed data transmission.
The cost of equipment for internal connections is much higher than that of foreign counterparts, depending on the model and manufacturer.
Card (Card-Bus)
card-type devices are intended for computer equipment with a special card slot PCCard. This equipment has a built-in antenna for receiving and transmitting the signal, different ergonomic housing, concise design, reliability, and ease of configuration. Dissemination of such devices have not yet received, but have won their share of the market.
How to choose a Wi-Fi adapter
When buying network equipment Wi-Fi should pay attention to the following parameters: interoperability standard, frequency, transmitter power, encryption and range.
Compatibility
The network module is intended for connection to the computer and television technology. To connect devices to desktop and laptop computers using the installation driver and other software.
When selecting equipment for Internet-compatible TV setting is important.
Compatibility can be checked using the specification of the equipment, which lists all brands of television sets that are suitable for a specific model of equipment.
If you do not want to buy proprietary hardware, a specific brand of TV or for connecting to a PC, laptop or tablet, then it is recommended to give preference to a universal model.
Standard
Standard Wi-Fi connection - an important parameter selection of equipment for wireless transmission speed of which depends. Device supports the following standards: 802.11n, 802.11g, 802.11b, and 802.11a.
The maximum possible data transfer rate is 300 Mbit / s, and is provided 802.11n standard. 802.11a standard transmits data at speeds up to 54 Mbit / s.
It is recommended to choose a module with the same index, which is supported by Wi-Fi router. If the router 802.11a adapter must have similar rates. Device selection standard lower than the router limitation fraught Internet speed.
It is important to remember that the actual speed of the wireless module is far below the maximum stated by the manufacturer. Therefore it is not necessary to choose high-speed models, better to give preference modules with average speed, which is enough for a comfortable use of the Internet.
Frequency
The operating frequency of wireless communication modules - the next parameter selection device. This figure depends on the standard Wi fi connection, which is designed module. Basic models operate at a frequency of 2.5-5 GHz.
For 802.11a uses the 5 GHz frequency for 802.11n - from 2.5 to 5 GHz. The remaining standards run on the initial frequencies of 2.5 GHz.
If you intend to share the router and adapter, the operating frequencies of such devices should be the same. Thus, if the frequency router - 2.5 GHz, and the unit will operate at the same frequency, otherwise possible malfunction.
Power transmitter module
This parameter is responsible for the stable and high-quality connection. Units of measurement - dBm. To ensure good wireless connection, it is recommended to choose the model of power: 16-20 dBm.
access encryption
Feature selection, which provides reliable protection against tampering and unauthorized access by other users.
These devices support a special WAP and WAP2 types of encryption protocols.
Range of action
This parameter determines the maximum distance at which the device operates. Measurement unit - meters. The specification of the device two values - a range of indoor and outdoor areas.
For use in the home will suit the model with a range of up to 5 meters, providing full coverage and seamless communication.
Blitz-tips
- Choosing equipment to connect to the Internet, it is recommended to determine the type, the functional and technical specifications of the device, read the reviews on selected models.
- Stable operation of the module and reliable wireless connection depends on properly selected data transfer standard.
- It is recommended to buy the device with an external antenna, or the ability to install.
- For home use models suited to the antenna, in which the transmission power of the Internet data is at least 20 dBm.
- Reliable and safe device supports advanced protocols for encryption of personal data - WPA (WPA2), WPA (WPA2) / PSK.
- Connectivity Module is installed and configured according to user instructions suggested by the manufacturer.
Adapters Wi-Fi - is a functional unit that provides reliable wireless Internet connection to the access point.
