Considerations on millimeter-wave indoor LAN

This paper compares four types of millimeter-wave indoor LAN systems such as direct wave, adaptive null control antenna, route diversity, and adaptive delay equalizing systems, and then selects the direct wave or line-of-sight system as the most feasible one in the first introduction period. The direct wave system can be used with a sharp beam user terminal antenna in a reflection controlled room. A promising propagation controlled configuration and the received signal power have been experimentally analyzed and measured. Finally, an effective way of radio absorber use is confirmed