A 60GHz gigabit access transponder equipment for short range and short-time file transfer

A novel concept of short range communication is proposed for millimetre-wave high speed file transfer. A very high gain antenna generates a quasi-plane wave and synthesises a coverage up to 10m with uniform illumination in near field region of the aperture, in analogy to a compact range. Apart from conventional short range communication systems with the level diagram still following Friis´s equation for the far field, a mobile user, in line of sight (LOS) everywhere in the coverage, receives the constant field almost free of multipath. In terms of the safety issue for the human body, the peak field strength from the large aperture with high gain is much lower than that from the point source-type small antenna with low gain. In this paper, the concept as well as the feasibility study is introduced.