A novel 60 GHz short range Gigabit wireless access system using a large array antenna

A novel concept of short range wireless access system is proposed for multi-Gb/s data transfer in the 60 GHz band. An extremely large array antenna (64×64 elements) generates a quasi-plane wave and forms communication zone proportional to the antenna size. The key is that the stable signal coverage up to 10 m with uniform illumination still stays in the Fresnel region of the array antenna. The link budget based upon Friis Transmission Equation is not applicable in this short range communication system. The mobile user standing everywhere in the coverage, receives a constant signal almost free of multipath. For demonstrations, the circularly-polarized waveguide slot arrays are designed and fabricated first. They are installed in the prototype of a short range Gigabit wireless access system as the transmitting antenna. The system performances of not only the RF receiving level but also the bit error rate et al. will be evaluated to verify our proposal.