Title :
Microwave leakage shift suppression based on home made DDS
Author :
Lin, Pingwei ; Liu, Shi ; Liu, Nianfeng
Author_Institution :
Nat. Inst. of Metrol. (NIM), Beijing, China
Abstract :
A home made DDS based on a FPGA and a DAC was designed to suppress microwave leakage shifts. The phase invariability was realized utilizing the DDS. The spectrum performance and phase noise of the DDS were measured and were good enough to be used for the microwave synthesizer. From the experiment result of fountain clock the introduced frequency shift by switch DDS output frequency should be less than 2E-16.
Keywords :
digital-analogue conversion; direct digital synthesis; field programmable gate arrays; phase noise; FPGA; digital-analog converter; direct digital synthesis; frequency shift; microwave leakage shift suppression; microwave synthesizer; phase invariability; phase noise; Clocks; Delay effects; Field programmable gate arrays; Frequency modulation; Frequency synthesizers; Manufacturing; Signal resolution; Switches; Transient analysis; Tuning;
Conference_Titel :
Frequency Control Symposium, 2009 Joint with the 22nd European Frequency and Time forum. IEEE International
Conference_Location :
Besancon
Print_ISBN :
978-1-4244-3511-1
Electronic_ISBN :
1075-6787
DOI :
10.1109/FREQ.2009.5168349
