| As the heart of the wireless communication, radar, electronic detectors, anti-detectors and measure equipments, frequency synthesizer can affect mostly performance of the system. We need it have Low phase noise, high spurious restraining, low jumping time and high working frequency.The subject comes from the project " RF frequency synthesizer ".It is form Chendu Sine Science and Technology Ltd. The subject need two independence source, and every source have 3 output.The output frequency was wide and have many form. And we have used frequency divider, PLL, DDS technology and so on.At first, the history and the important specifications of the frequency synthesizer is reviewed. Subsequently, the basic theory and some question about PLL, DDS was discussed. At last, the scheme of subject, the realization of each module, some questions which we must be pay much attention in the system design, and the ultimate testing result of this subject is introduced in detail. |
