最后，讨论了为实现多功能综合射频系统必须首先研究的共用信号、共用孔径以及其它关键技术。
Finally, the waveform of shared signal, the design of shared aperture and other key technologies to realize MFIRFS are discussed.
小型化是现代电子通信系统的一个重要的研究方向，射频信道的小型化设计重点是频率综合器的小型化设计。
Miniaturization is an important research direction in modern electronic communication system, and the design of RF channel emphasizes the miniaturization design of frequency synthesizer.
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