The Wideband Inter Networking engineering test and Demonstration Satellite (WINDS) aims t developing and verifying the key technologies for future ultra high speed satellite communications such as: (1) Ka-band multi-beam antenna with high power multi-port amplifier; (2) Ka-band active phased array antenna; and (3) an on-board Asynchronous Transfer Mode switch. It also aims to create and demonstrate new utilizations for satellite communications through various experiments. The development of WINDS has been conducted by NASDA and the Communications Research Laboratory (CRL) and WINDS is scheduled to be launched by H-IIA launch vehicle in 2005 (first year). In this paper, the current development status of WINDS system is reported.