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混频器作为接收机前端重要的组成部分,其线性度的好坏对整个系统性能有重要影响。在混频器各种线性度指标的基础上,分析混频器的1dB压缩点、二阶交调点(IIP2)和三阶交调点(IIP3)之间的内在关系,提出在实际中如何测试混频器线性度指标,具有实用性。
Mixer as an important part of the front-end receiver, the linearity of the quality of the entire system performance has a significant impact. Based on the mixer’s various linearity indexes, the inherent relationship between 1dB compression point, second order intercept point (IIP2) and third order intercept point (IIP3) of the mixer is analyzed. Test mixer linearity indicators, with practicality.