EurekAlert August 4, 2020
The transceiver developed by researchers in Japan using standard CMOS technology uses 27-31 GHz frequency range for uplink and 17-21 GHz range for downlink. A high-quality transformer is used to achieve efficient power use and high linearity in transmission, resulting in lower distortion during transmission. Two RX channels allows for receiving signals from two satellites simultaneously in parallel using either two independent polarization modes or two different frequencies. It can perform adjacent-channel interference cancellation increasing the dynamic range of the system, thus allowing it to operate correctly even in less-than-ideal scenarios with stronger noise and interference. The prototype chip was tested using all the modulation schemes regulated by the SATCOM DVB-S2X standard. The results were very promising. Among other things, this transceiver could bring Internet to people in remote rural areas and at sea…read more.