60 GHz band compact range communication with a large array base station

A 60 GHz short range communication has been developed in “the Research and Development for Expansion of Radio Wave Resources” under a contract with the Ministry of Internal Affairs and Communications. A high speed file transfer (3.5 Gbps) in QPSK was successfully demonstrated and enhanced system up to 6 Gbps in 16 QAM is now under study. The novel concept of Compact Range Communication has been proposed by the authors. The reader/writer at the base station named GATE (Gigabit Access Transponder Equipment) has a very large aperture antenna with clearly define coverage area and could be the access to the network. The mobile terminals are in the near field of the GATE antenna in contrast with the conventional short range communication, where most of the mobile users are staying in the far field. This talk reviews the progress of the project and highlights the key features of the compact range communications, such as the field uniformity and mobile user coverage, robustness against multi-paths, mutual coupling between Rx and Tx antennas, Inter-Symbol Interference and Bit Error Rate etc.