Standards Research in Japan: Latest Development of Millimeter-Wave and Submillimeter-Wave Measurements

In recent communication networks, 100 Gb/s passive optical Ethernet networks have been established and started becoming widely used. In consumer broadcasting, the use of high-definition television in studio and live-relay broadcasts has been planned by the Japanese government. These high-speed wireless technologies require the millimeter-wave frequency band from 30 to 300 GHz to provide sufficient bandwidth. In a wireless link system, spurious signals must be identified and managed in accordance with Japanese Radio Law relating to the recommendations by the International Telecommunication Union Radio section (ITUR). According to the regulations for spurious domain emission in ITU-R SM 329-10 (02/2003), limits on spurious domain emissions for radio equipment over the range of 9 kHz to 300 GHz must be currently considered and tested before being applied. The recommended frequency ranges of spurious domain measurement depend on the fundamental frequency in the wireless link system.