For the first time ever Passive Wi-Fi system can transmit signals up to 11 megabytes per second that can be decoded on any billions of devices with Wi-Fi connectivity. Researchers said that these speeds are lower than the maximum Wi-Fi speeds but around 11 times higher than the Bluetooth.
Scientists, including those of Indian-origin, have demonstrated that it is possible to generate Wi-Fi transmissions using 10,000 times less power than conventional methods, an advance that may help save battery life in Smartphone’s and other devices. An Indian-origin scientist Mr. Shyam Gollakota, Assistant Professor at the University of Washington said “We wanted to see if we could achieve Wi-Fi transmission using almost no power at all”. Mr. Gollakota also said that, it is basically passive Wi-Fi which delivers 10,000 times less power than the best thing out there.
Apart from saving battery life on today’s devices, wireless communication that uses almost no power will help to enable an internet of things reality where household of devices and wearable sensors can communicate using Wi-Fi systems without worrying about power. An array of sensors produces Wi-Fi packets of information using very little power by simply reflecting and absorbing the signal using a digital switch. In real world conditions, the team found that the passive Wi-Fi sensors and a Smartphone can communicate even at distances of 100 feet between them.
Indian-origin scientist Ms. Vamsi Talla, an electrical engineering doctoral student, at University of Washington, said “All the networking heavy-lifting and power consuming pieces are done by the plugged in device. The passive devices are only reflecting to generate the wifi packets, which is really energy efficient ways”.