| 摘要: |
| 文章介绍了智能天线射频前端的工作原理，并对射频前端的第一本振使用直接数字频率合成器（DDS）结合锁相环（PLL）的设计方案进行了讨论，分析了频率合成器的相噪特点和对寄生杂散电平的抑制措施，对智能天线射频部分的性能提高有一定参考意义。 |
| 关键词: 智能天线 射频前端 频率合成器 设计 |
| DOI：10.3969/j.issn.1001-893X. |
| Revised:December 20, 2000 |
| 基金项目: |
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| Design and Implementation of Frequency Synthesizer in RF Front- end of Smart Antenna |
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| Abstract: |
| The principle of the RF front-end in smart antenna is introduced in this paper, and the project of using frequency synthesizer by combining DDS and PLL in the first LO of the RF front-end is discussed, the characteristic of the phase noise and the restrain to the spurious level is also analyzed, it is useful for developing the RF front-end in the smart antenna. |
| Key words: Smart antenna,RF front-end,Frequency Synthesizer,Design, |
