Research Of The Broadband Frequency Synthesizer

As the key part of RF&MW equipments, frequency synthesizer’s quality candetermines some important indicators of the system. With the rapid development ofradar, wireless communication，MMIC and space technology, The frequency synthesistechnology has made great development. This paper introduced the history ofdevelopment of frequency synthesis technology, present brief introduction of the mainstream frequency synthesis technology, compared their respective advantages anddisadvantages, and then present the design and implement of the10GHz~20GHz ultrawideband frequency generator. In the design scheme, by careful analysis and calculatethe various indicators of the design, ensure the feasibility of this design. In this paper,divided the design into three parts, includes frequency generation part and control part,focusing on the frequency generation part and control part. The fractional-N YTOPLL module cover the entire frequency band. Control part is implemented by highspeed FPGA and necessary peripherals. For each part and module, selecting theappropriate circuit and devices, by good design and careful debugging, realized theindicators of the design.Eventually，the questions encountered in debugging the frequency synthesizerwere summarized in this article, some areas need improved are proposed.