The super-heterodyne receiver is always applied in modern communication system, mixer becomes the key component as is at the first part of system.
在现代通信系统中，毫米波频段通常采用超外差接收机，混频器作为第一级就成为关键部件。
2
Virtually all receivers in use today employ Armstrong 's superheterodyne concept.
实际上所有接收器在使用中今天使用阿姆斯壮的超级外差概念。
3
Compared with conventional superheterodyne radar, it presents several advantages such as reduced system complexity, allowing a higher level of circuit integration and low cost.