Title :
A DDS-based C-band wideband agile frequency synthesizer
Author :
Xin Xu ; Xiaohong Tang ; Tao Wu
Author_Institution :
Nat. Defense Key Lab. of Extremely High Freq. Complex Syst., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, a DDS-based C-band wideband agile frequency synthesizer is described. The DDS (Direct Digital Synthesizer) is used to achieve agile frequency hopping. The output of DDS is combined with four independent PLLs, which generate low phase noise LO signal, to expand the bandwidth. Measured results show that the frequency hopping time is shorter than 500ns. The spur suppression is better than 60dB and the phase noise is lower than -104dBc/Hz@10kHz from 6.84~7.956GHz.
Keywords :
direct digital synthesis; phase noise; DDS based C-band wideband agile frequency synthesizer; agile frequency hopping; direct digital synthesizer; low phase noise signal; spur suppression; Clocks; Frequency measurement; Frequency synthesizers; Phase noise; Semiconductor device measurement; Synthesizers; Wideband; Direct digital synthesizer(DDS); frequency agility; frequency hopping time; frequency synthesizer; wideband;
Conference_Titel :
Microwave and Millimeter Wave Circuits and System Technology (MMWCST), 2013 International Workshop on
Conference_Location :
Chengdu
DOI :
10.1109/MMWCST.2013.6814643
