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Wi-Fi 802.11n approved

24.10.2009

The Institute of Electrical and Electronics Engineers (IEEE) has approved the specifications for the 802.11n Wi-Fi wireless standard. This event ended the last version of Wi-Fi in the "draft" state it has been in since 2006.

From now on, all companies will be able to develop and use 802.11n Wi-Fi adapters in their equipment without fear that their devices will be incompatible with the final version of the protocol, as happened before. Officially, this standard should be published in mid-October.

The new version assumes the transfer of information at a maximum speed of up to 300 Mb / s, which is 6 times faster than using the previous Wi-Fi 802.11g. In addition to the increase in speed, the range should also expand.

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Repeater antennas - from sea water 30.01.2016

The construction of repeater antennas is a costly, cumbersome and time-consuming process. Multi-meter iron trusses are installed on the foundation - all this requires lengthy preparation and is not justified as a temporary solution. To get away from the process of building antennas, Mitsubishi Electric proposed and tested an interesting method in practice. A column of sea water was used as a transceiver antenna. Salt sea water is a conductor for current. Something, but there is more than enough sea water around Japan.

Mitsubishi has developed a repeater design that feeds a high-frequency signal into the water jet. A channel is also created for receiving a signal coming from the water column. The development was named "Sea Aerial". The nozzles of the jet pump are isolated, and the high-frequency current does not go beyond the complex with the transmitter. Such a complex can be towed by a boat to a given point and deployed in a matter of minutes. The system requires only sea water to operate.

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The company is confident that this direction will become a good business. The only limitation will be that the proposed technology is not suitable for a high frequency signal. Cellular and Wi-Fi pass by. However, the length of the radio wave involved is determined by the configuration of the water pump nozzle. Perhaps the company will be able to come up with something suitable for relaying a high-frequency signal.

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