An Improved Triple-Tunable Millimeter-Wave Frequency Synthesizer with High Performance

作者：Yang, Yuanwang^*; Cai, Jingye; Jin, Haiyan

来源：IEICE TRANSACTIONS ON ELECTRONICS, 2011, E94C(11): 1802-1806.

DOI：10.1587/transele.E94.C.1802

• direct digital synthesizer
• phase locked loop
• spurious component
• multiple-tune

In this letter, an improved triple-tunable frequency synthesizer structure to achieve both high frequency resolution and fast switching speed without degradation of spurious signals (spurs) level performance is proposed. According to this structure, a high performance millimeter-wave frequency synthesizer with low spurious, low phase noise, and fast switching speed, is developed. This synthesizer driven by the direct digital synthesizer (DDS) AD9956 can adjust the output of a DDS and frequency division ratios of two variable frequency dividers (VFDs) to move the spurious components outside the loop bandwidth of the phase-locked loop (PLL). Moreover, the ADF4252 based microwave PLL can further suppress the phase noise. Experimental results from the implemented synthesizer show that remarkable performance improvements have been achieved.

• 出版日期2011-11
• 单位电子科技大学