GIGABIT FIDELITY(Gi-Fi)

         Gi-Fi will helps to push wireless communications to faster drive. For many years cables ruled the world. Since the installation of these optical fibers need much cost,caused a greater difficulty  and thus led to wireless access. The first and foremost one is Bluetooth which is used to cover 9-10 meters. Later on WI-FI entered into field which can cover 91 meters. However the need for increase in data rates are growing, so to meet the requirements we need another way of transmission.

Gi-Fi is a wireless technology developed to work in a range of 10m with transmission rates of gigabits per second. Gi-Fi is evolved since in Bluetooth and WIFI transfer rates are 800kbps and 11mbps respectively, but for Gi-Fi as the name specifies it is gigabits per second.

How it works???

            In  this we use duplexer so that antenna  can be used for both transmission and reception purposes. During transmission, intended data files are converted from IF signals into RF signals using two mixers. To have  high signal strength  the converted RF signals are fed to power amplifier at the transmission side. During reception, RF files are converted to  a range of  normal data files. In receiver side, we use heterodyne  receiver construction  to avoid leakage from direct conversion.    

         With Gi-Fi we can even reduce the power consumption from 10Watts(in Bluetooth and Wi-Fi) to 2Watts which is mainly essential. With the GIFI we can access home appliances and internet radio modules.  Gi-Fi is even highly secured as it follows IEEE 802.15.3C By considering the success of Wi-Fi and Wimax. we can surely say that GIFI is able to play a key role in next years.

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latest land mine detection technology

Detecting land mines is the major problem in combing areas where terrorists place land mines to kill the public as well as soldiers in reaching them. There are many technologies developed so far, but here we talk about latest one to detect the land mines before stepping on it. This technology is under design by LEMUR STUDIO design organization located at Columbia. This technology needs two devices, one fitted on shoes for prior detection and another on hand to view the exact location of land mine through GPS. 

The key elements in the two devices are coil, microprocessor, radio transmitter, hand held device, GPS. Coil in the shoe is to emit the electromagnetic waves, microprocessor is used to detect the changes in the electromagnetic waves, radio transmitter is used to send the changes to the hand held device and the GPS is for locating the object in terms of longitude, latitude and elevation.

HOW IT WORKS???

The coil in the shoe is emitting electromagnetic waves(these are released when electrons pass through conductor) continuously, when these get disturbed by the land mine, the signals at that moment are captured by the microprocessor which are sent to hand held device through GPS. The alarm present in the hand held device gets on and position of the land mine can be detected before stepping on it.

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