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Channel allocation of 300GHz band for fiber-optic-speed wireless communication

The unallocated frequency region above 275GHz with a vast bandwidth can potentially be utilized for ultrahigh-speed wireless communication. In particular, the 300GHz band is attractive since the propagation decay in air around 300GHz is relatively low. However, since studies on terahertz wireless communication including the 300GHz band are still at an early stage, most experiments have been performed without a specific target frequency. To promote practical use, the channel allocation and target frequency should be clarified. In this paper, the channel allocation of the 300GHz band for fiber-optic-speed wireless communication is discussed for this purpose. In the allocation, compatibility with the 60GHz band is considered. Using an allocated frequency range from 265 to 275GHz, it is found that the utilization of the frequency range from 265.68 to 317.52GHz is reasonable for the 300GHz band. This frequency region enables multiusers to enjoy fiber-optic speeds exceeding 10Gbps. Finally, an example of a CMOS transmitter for 300GHz wireless communication is demonstrated. The frequency range from 275 to 305GHz realizes six-channel wireless communication with a data rate of 17.5Gbps/ch.