Improvement in EVM by Cryogenically Cooled Technique for Millimeter Wave Band Receiving Amplifiers

This paper presents to improve transmission quality and capacity employing cryogenically cooled technique for millimeter-waveband receiving amplifiers. It is known that noise figure and small signal gain of millimeter wave band receiving amplifier can be improved under cryogenic temperature environment. Because these features mean to enhance signal to noise power ratio, error vector magnitude (EVM) can improve under cryogenic temperature environment. Furthermore, radio communication system can improve capacity upgrading higher-order modulation such as 1024 QAM. The simulation results confirm to improve EVM values and capacity when employing the experimental results of 60 GHz band amplifiers under cryogenic temperature environment. From these results, the cryogenically cooled technique for millimeter wave band receiving amplifiers is effective for improving radio communication system performance.