New Generation 6-GHz l800 Channel/78 Mbits Radio System

Abstract

A new generation of the all solid-state heterodyne transmitter receiver fitted with a high power GaAs FET (Field Effect Transistor) amplifier with the output power of maximum 5-W and low noise GaAs FET with the receiver noise figure of 3-dB for operation in the 6-GHz band has been developed. And especially adopted for space diversity reception is an IF phase combiner for hitless combining two IF signals by high speed endless electronic phase shifter in the tranmission of up to 1800 channel FDM signals or 78 Mbits/s 8-phase PSK digital signals in a fading area.