UltrahighSpeed OneChip CMOS Transceiver with 300GHz Band The 300GHz band is a promising frequency band to realize wireless communication comparable to the opticalcommunication speed by using a wide frequency band with low atmospheric attenuation. Using Ch. 66 in the channel allocation proposed by IEEE 802.15.3d in the 300 GHz band, we have realized a onechip terahertz CMOS transceiver. This onechip CMOS transceiver can achieve communication speeds of up to 80 Gbs. This paper describes the background of 300 GHz band communication and the technology of one chip CMOS transceiver. Furthermore, the possibility of ultrahighspeed wireless communication reaching space as well as short distance by using terahertz radio is discussed.

A 37 to 40 GHz Transceiver for Fifth Generation Communication Systems A highintegrated fifth generation (5G) transceiver that covers over the band 37 to 40 GHz has been manufactured by standard 65nm CMOS technology. The single CMOS chip that includes doublebalanced upconversion mixer, doublebalanced downconversion mixer, low noise amplifier, buffer amplifier, power amplifier, and switch is mounted on the Rogers board by the flipchip assembly technology. The measurement results show that the transceiver can achieve an OP1dB of 12.23 dBm and a poweradded efficiency at OP 1 dB of 12.4%. Under the OFDM 64QAM 500MHz modulation signal at 38 GHz, the 30 dB error vector magnitude (EVM) compliant output power of the proposed power amplifier is 1 dBm.