WiFi Adapters

The current variety of USB adapters offer up to from 1000mw to 3000 mw of power but more normally the ever so popular Alfa AWUS036H offers an amazing 1000mw (30 dBm) of power. Please be aware that to achieve this output the adapters have to be connected to a USB Hub or PC device capable of delivering this much power to get the most signal power....

The current variety of USB adapters offer up to from 1000mw to 3000 mw of power but more normally the ever so popular Alfa AWUS036H offers an amazing 1000mw (30 dBm) of power. Please be aware that to achieve this output the adapters have to be connected to a USB Hub or PC device capable of delivering this much power to get the most signal power. Where the available power is less than the maximum possible there is no problem for the adapter it simply delivers less signal power . But even then the Wifi signal power well exceeds that provided by the normal Wifi routers provided by your ISP.

USB Standards

The USB interface offers both a WiFi signal path and acts as a power source to the adapter. The USB 1.x and 2.0 specifications provide a 5 V supply on a single wire to power connected USB devices. The specification provides for no more than 5.25 V and no less than 4.75 V (5 V±5%) between the positive and negative bus power lines. For USB 3.0, the voltage supplied by low-powered hub ports is 4.45–5.25 V.
A unit load is defined as 100 mA in USB 2.0, and 150 mA in USB 3.0. A device may draw a maximum of 5 unit loads (500 mA) from a port in USB 2.0 and 6 unit loads (900 mA) in USB 3.0. There are two types of devices: low-power and high-power. A low-power device draws at most 1 unit load, with minimum operating voltage of 4.4 V in USB 2.0, and 4 V in USB 3.0. A high-power device draws, at most, the maximum number of unit loads the standard permits. Every device functions initially as low-power—but may request high-power, and gets it if it's available on the providing bus.

Some devices, such as high-speed external disk drives, or in this case high powered USB Wifi adapters require more than 500 mA of current and therefore may have power issues if powered from just one USB 2.0 port. Some devices may come with an external power source or a Y-shaped cable that has two USB connectors (one for power+data, the other for power only) to plug into a computer. With such a cable, a device can draw power from two USB ports simultaneously.

A bus-powered hub initialises itself at 1 unit load and transitions to maximum unit loads after it completes hub configuration. Any device connected to the hub draws 1 unit load regardless of the current draw of devices connected to other ports of the hub (i.e., one device connected on a four-port hub draws only 1 unit load despite the fact that more unit loads are being supplied to the hub).
A self-powered hub supplies maximum supported unit loads to any device connected to it. In addition, the VBUS presents 1 unit load upstream for communication if parts of the Hub are powered down.

USB Adapter Protocols and Speeds

All our USB adapters provide support for the IEEE 802.11 protocols. The standards are "b" for up to 11 Mb/s, "g" for up to 54 Mb/s and "n" for up to 300 Mb/s. Our n type adapters normally operate up to 150 M/s. The n type adapters are especially useful for streaming applications for video and gaming and Wifi n storage devices. All the adapters are capable of backward compatibility so they will work with older and slower speed WiFi devices.

USB WiFi Cards, PCI and mini PCI

Extend your WiFi network range. Monitor access points in the distance and test the security of your network with free software. Find the USB wireless adapter you need to get connected. With blazing-fast transfer speeds and built-in security protection, getting more from your USB Wi-Fi connection with our range of powerful network adapters from Alfa Network, WiFiSKY , WiFiScan....

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Subcategories

  • Mini PCI Adapters

    Mini PCI specification defines an alternate implementation of PCI small form referred to herein as a Mini PCI.
    Many Mini PCI devices were developed such as WiFi, Fast Ethernet, Bluetooth, modems (often Winmodems), sound cards, cryptographic accelerators, SCSI, IDE ATA, SATA controllers and combination cards.
    Mini PCI cards can be used with standard PCI-equipped hardware, using Mini PCIto-PCI converters.

  • USB WiFi Adapters

    The Wireless USB Network Adapter connects your desktop or notebook computer to your wireless network via an open USB port on your computer. The USB Adapter upgrades your computer's wireless connection and when used in conjunction with an enhanced Wireless Router, provides the optimal speed and performance for a wireless network.

    Using the Router, AlfaR36, TP-Link TL-WR5210G... , and WLAN USB Adapter ( Alfa AWUS036H, NHR, WiFiSky, WiFiScan...) like as the central connection points of your wireless network provides the ideal bandwidth necessary for handling applications beyond simple emailing and web surfing and allows more freedon to stream audio and transfer files.

    High Power Wireless USB Adapters (2000mW, 3000mW) provides high speed data transfers, online gaming, and lightning fast downloads.
    The Enhanced N range is 802.11b and g certified and based on the 802.11n technology. This range will give you 802.11n technology at an even more affordable price. USB devices can be easily disconnected / moved between devices.
    Also in combination with an high power outdoor antenna for even longer range.