Ultra-low energy consumption Passive Wi-Fi speed exceeds 11Mbps

According to foreign media reports, a research team at the University of Washington announced to the outside world on Monday that the Passive Wi-Fi system it developed has made a new breakthrough in wireless transmission speed. The downlink wireless speed can reach 11Mbps, which is comparable to the current 4G LTE speed.

Passive Wi-Fi is a wireless system based on backscatter communication technology. It uses radio waves to carry both data and power, allowing devices without power supply to achieve two-way communication. For example, the RFID technology on the public transportation card commonly used by people is also an application based on this principle.

Previously, researchers have used this principle to collect TV or Wi-Fi signals as a source of electricity and have carried out data communication experiments with a communication distance of about 70 cm and a transmission speed of about 1 Kbps.

However, the most striking feature of Passive Wi-Fi is its ultra-low energy consumption. It is reported that its radio frequency energy consumption is only one ten-thousandth of that of traditional Wi-Fi systems. In addition, its manufacturing cost is extremely low and it does not require replacement or maintenance. Therefore, there is no need to worry about purchasing batteries in advance or maintaining expensive power generation equipment.

Moreover, Passive Wi-Fi has also made a new breakthrough in transmission distance, and can communicate within a coverage area of ​​about 30.48 meters in radius. Obviously, this has considerable technical appeal for small IoT devices, both in terms of communication needs and power supply.