A 7GHz Band GaAs FET Amplifier for the Straight-Through-Repeater

A 7GHz band GaAs FET amplifier for the straight-through-repeater has been developed. The amplifier has six single-ended stages, a 40dB linear gain, a 4 to 4.5dB noise figure and 17dBm saturated output power over a frequency range of 6.5 to 6.9GHz. The power consumption is lW maximum. Distortion for FM transmission is sufficiently low over a wide dynamic range up to saturation, so the repeater needs no additional AGC circuit for output limitting. 960 telephone channel FM Transmission noise loading test results show distortion to be less than 10pWOp up to saturation. For two FM/ FDM carrier transmission, the distortion is nearly the same as single carrier up to the 1dB compression point.