Introduction: USB wireless network card

Wireless is mobile, so wireless Internet access is born in the mobile nature. This article will introduce you to the cute, compact, and convenient USB wireless network card. Including network standards, interfaces, transmit power, and appearance. For more information, see the following.

With the maturity of IEEE 802.11 standard wireless network technology, the enhancement of product performance, and the gradual reduction of product prices, most home users have begun to belong to wireless networks based on the standard, even though Intel's laptop has a built-in wireless network card and is compatible with most mainstream wireless devices, considering Laptops and Desktops that are not on the platform, it is essential to select a suitable wireless network card.

According to the interface type, the wireless network card is divided into PCMCIA wireless network card, PCI interface wireless network card and USB interface wireless network card. Among them, the PCMCIA wireless network card is dedicated to the laptop, the PCI interface wireless network card is used for desktop, can be directly inserted into the desktop board PCI slot, and the USB interface wireless network card can be used for both laptop, it can also be used in desktops. It has the features of plug-and-play, easy to carry, and flexible to use, and is favored by more users.

Below we will introduce you to the USB wireless network card main reference standards:

1. wireless network standards: currently, wireless LAN devices on the market are mainly divided into 802.11b, 802.11g, and 802.11n. Supports the IEEE 802.11b standard NIC with a maximum speed of 11 Mbps and an IEEE 802.11g standard NIC with a maximum speed of 54 Mbps and a 11n speed of 300 M, many manufacturers have already eliminated 802.11b products, so when purchasing NICs, we can pay more attention to the other two standard products.

2. Interface Method: currently, USB 2.0/1.1/1.0 interfaces are supported on the market. However, most USB interfaces currently use USB interfaces. The Interface Standard provides Mbps data communication bandwidth.

3. transmit power: at present, the transmit power of the USB wireless network card is usually between 15 and 15 ~ 17dBm. The higher the power, the longer the transmission distance, so we try to choose products with higher transmission power. In particular, the latest antenna technology can improve the coverage of wireless network card signals and provide new personalized choices for mobile office and wireless LAN high-speed Interconnection.

5. Appearance of USB wireless network card: currently, USB wireless network card has two main appearance forms: box and USB disk. The box-type USB wireless network card has a data extension cable, most of which are exposed by the antenna, which makes it easier to place on the desktop. USB wireless NICs of USB flash drives generally have data extensions. Their USB connectors can also be directly connected to USB interfaces of computers. The antennas of USB wireless NICs of USB flash drives are built in, therefore, it is inconvenient to adjust the orientation of the antenna. For a comparison, the USB flash drive Nic is more compact and convenient. At present, USB flash drive wireless NICs with such USB interfaces are rare on the market. Only companies with advanced technologies such as Hisense digital, angke, and Huawei have launched corresponding products.