However, recent German research institutes have already set a record for the world's wireless broadband. With a distance of 1,000 meters and a frequency band of 240 GHz, the transmission speed reaches 40 Gbps. This is equivalent to downloading 10 high-definition movies for 2 hours in one second, which is almost equal to optical fiber. Speed, and is expected to allow the wireless network in rural areas across the country can enjoy.

German research institutes have recently deployed the issue of improving wireless networks and speed, allowing a DVD to be downloaded within one second, recently integrated at the Fraunhofer Institute and the Karlsruhe Institute of Technology. The circuit achieves 40Gbps data uplink speed and 240GHz frequency band. It is 137 times faster than the current 802.11n standard, which can reach a maximum speed of 300 Mbps.

The transmitters and receivers of this wireless chip are designed on a 4*1.5 mm integrated circuit, use special transistors, and have high carrier mobility (HEMTs). The reason why the size is so small is because of the high frequency and average signal transmission. Stay in the 200-280GHz frequency band.

Currently Siemens Germany and KATHREIN-Werke KG have funded the project and hope that the technology will be commercialized soon. The most important thing now is to make these chips suitable for tablet PCs, smart phones, notebooks, and other cell phone specifications. To ensure that such a fast wireless network has excellent signal fidelity, such as in this remote demonstration, a signal requirement is transmitted between two skyscrapers separated by one kilometer.

The new design not only enables broadband network-directional propagation, but also has a low degree of signal attenuation in this frequency range. Compared to data transmission through free-space optical systems, the new design method makes wireless circuits easier to install and transmits in rain and fog weather. Also more stable.