This speciality standard will give a go-ahead for using as the reference of the cold and room-temperature microwavenoise standard source below 3dB ultra-low-noise received system.
本标准批准后即作为噪声系数3分贝以下低噪声精密测试时的“冷热源”专业技术标准。
2
That noise turned out to be the cosmic microwave background, the afterglow of the big bang fireball.
这一噪音最终被证实是宇宙背景微波，大爆炸的余辉。
3
The microwave solid state noise diodes are investigated based on the PN junction avalanche multiplication theory with tunneling penetration.