A 38 GHz-band 1 Gbps TDD FWA system using Co-polarization dual antenna with high spatial isolation

In order to realize a broadband millimeter-wave band radio communications system which enables the seamless interconnection with optical cable networks, we have developed the wireless key devices of System on Chip (SoC) which is unified from an high-speed Multi-level Quadrature Amplitude Modulation (M-QAM) modem to the network interface, and the high-order-accuracy quadrature modulator and demodulator Monolithic Microwave Integrated Circuit (MMIC) and the broadband frequency converter MMIC. By combining with these devices and the high spatial isolation antennas that are separated in transmitter and receiver and employed the characteristic of the millimeter wave efficiently, we have developed the 38 GHz-band small and broadband Fixed Wireless Access (FWA) system using Time Division Duplex (TDD) mode with adaptive radio resource control of up-link and down-link bandwidth. We have realized the performance that maximum effective throughput is 1 Gbps in single carrier 64QAM and 200 MHz of radio clock frequency, and have reached the stage of the field trial at present.