Study C-band Frequency Source Based On DDS

Frequency source has become one of the most important devices in communication system and military field.This design focuses on how to study the low phase noise,low spuious,high stability of the C band frequency source is based on the AD9914 DDS chip and on the basis of the FPGA.This design outlines the basic principles of frequency synthesis technology and frequency source design.and presents the design scheme.The hardware circuit is designed.from the AD9914 chip output signal,after filtering amplification frequency and other processing.in order to output higher quality signal, but also the use of parallel coupled microstrip line filter.Finally,the overall performance of the system debugging the design is to achieve and to achieve the expected technical indicators.The design firstly outlines the main principles of this technology DDS.Secondly,according to the design needs to put forward a design scheme of the program carried out a feasibility analysis.Starting from the design,the design of the hardware and software circuit section,and finally the entire frequency source system testing and debugging.