Title :
A C-band Low-noise Frequency Synthesizer Based on Digital Phase-locked Loop
Author :
Xue-Lin, Yuan ; Chang, ZHU ; Nai-Chang, Yuan
Author_Institution :
Nat. Univ. of Defense Technol., Changsha
Abstract :
To reduce phase noise of microwave-band frequency synthesizer based on phase-locked loop(PLL), the method that the output signal of VCO is mixed with a Lo signal and the IF signal is detected, is proposed. Then, the compatible loop filter is designed. Finally, the experimental results prove that the phase noise of improved frequency synthesizer is greatly lower than that of directly phase-locked synthesizer.
Keywords :
circuit noise; digital phase locked loops; frequency synthesizers; microwave circuits; phase noise; voltage-controlled oscillators; C-band low-noise frequency synthesizer; IF signal; digital phase-locked loop; directly phase-locked synthesizer; loop filter; microwave-band frequency synthesizer; phase noise; voltage controlled oscillator; Filters; Frequency conversion; Frequency synthesizers; Phase detection; Phase locked loops; Phase noise; RF signals; Signal detection; Transfer functions; Voltage-controlled oscillators;
Conference_Titel :
Microwave and Millimeter Wave Technology, 2007. ICMMT '07. International Conference on
Conference_Location :
Builin
Print_ISBN :
1-4244-1049-5
Electronic_ISBN :
1-4244-1049-5
DOI :
10.1109/ICMMT.2007.381410
