The Development Of A New Type Of Klystron Amplifier Excitation Source

With the rapid development of modern communication,Radar and satellite technology, klystron amplifier has been applied to transmitter widely.As the most important part, the request for higher performance of driving source is put forward,especially the low phase noise performance. Usually,only PLL technology is adopted in driving source,however, as the direct digital synthesis technology developed fantasticly fast,the DDS-PLL technology can be applied to realize high performance microwave driving source. The subject comes from No. 784 factory,named "The driving source of klystron amplifier ".The author applied DDS-PLL technology to realize the subject. The scheme is innovative and original not only in the technology but also in some module circuit. The basic principle of klystron amplifier and driving source is introduced at first in this paper.Subsequently,the basic theory and application about phase lock loop frequency synthesis,direct digital synthesis,LC filter and low noise amplifier are discussed. Finally, the scheme of the subject, the functional realization of each module, some questions which must be pay much attention in the system design, and the ultimate testing result of the subject is represented and analyzed in detail.