A crosstalk optimization method for dual-band DDS frequency source

Based on the current development direction of frequency source and its application field, the advantages and difficulties in realization of dual-band frequency source are analyzed in this paper. A dual-band DDS system of digital receiver is chosen as an analytic object. The causes and mechanisms of the crosstalk problem are demonstrated, and a general method for crosstalk optimization is proposed. By this method, the system is able to achieve the performance requirements under the circumstances that two bands work at the same time. The emphasis of this paper is the analysis on causes of crosstalk and crosstalk optimization of dual-band frequency source.