NTT Energy and Environment Systems Laboratories

Project

• Energy Systems Project

There are many kinds of electromagnetic waves radiated from electronic devices in our living environment. These electromagnetic waves can be divided into two categories. One category is intentionally radiated waves from wireless transmitters on mobile phones, wireless LANs, etc. The other category is unintentionally radiated waves from PCs, telecommunications equipment, household appliances, and so on. The unintentional radiation has been increasing as a result of the progress in information and communication technologies and the use of switching power supply systems to reduce energy consumption.
On the other hand, the driving voltage of digital circuits in devices and the telecommunications signal voltage are becoming lower. As a result, devices are now more susceptible to electromagnetic waves and surge currents due to lightning strikes.
The Energy and Environment Systems Laboratories has been researching and developing technologies for electromagnetic compatibility (EMC), to reduce unintentional radiation and to make equipment immune the electromagnetic waves and surges. Our research and development is very important for guaranteeing high-quality, reliable telecommunication services.

Semi-anechoic chamber

Operation and control room

Electromagnetic environment and EMC issues related to telecommunication systems.