一种S波段高线性度下变频模块的设计

Design of an S-band high-linearity down conversion module

描述了一种应用于S波段接收通道的高线性度下变频模块设计,针对模块的增益、线性度、杂谐波抑制等关键技术指标进行了详细的理论和仿真分析,并硬件实现了该模块。该模块主要采用SMD器件,包括有源混频器、高OIP3放大器和LC滤波器等。测试结果显示,模块增益为21 d B,杂谐波抑制度大于65 d Bc,对特定频点的抑制度大于40 d Bc,IIP3大于24 d Bm,表明该模块满足指标要求,能够充分适应高性能接收通道的应用要求。

A high-linearity down conversion module is designed for the S-band receiving channel. The key technical specifications such as the gain, linearity as well as spurious and harmonic wave suppression are simulated and analyzed theoretically in detail with the hardware implemented. The module mainly adopts the SMD devices, including the active mixer, the high-0IP3 amplifier and the LC filter. The test results show that the gain of the module is 21 dB, the spurious and harmonic wave suppression is greater than 65dBc, the suppression of the specific frequency is more than 40dBc, and the IIP3 is greater than 24dBm, indicating that the module meets the requirements, and can fully meet the application requirements of the high-performance receiving channel.