摘要
设计了一款应用于X波段相控阵系统的6位数字衰减器,该衰减器具有高线性度和低附加相移的特点。对常规开关Pi型衰减器的附加相移和线性度进行了分析,通过电感和电容补偿技术,实现了在宽带频率范围和不同衰减状态下都具有低的附加相移。此外,利用浮动衬底技术来实现较高的线性度。该衰减器基于0.13μm的BiCMOS工艺设计。仿真结果显示该衰减器的插入损耗为6.67dB,10GHz下在最小衰减和最大衰减处的1dB压缩点输入功率分别为15.5dBm和10dBm。
A new 6 bit high linearity digital attenuator with low phase variations for X-band phased arraysystems is presented in the paper. After detailed analysis of the phase variation and linearity of conventionalswitched Pi attenuators, the paper uses the inductive and capacitive compensation technologies to enable thelow phase variation at different attenuation states in a broadband frequency range. In addition, the floatingsubstrate technique is applied to obtain high linearity. The attenuator is fabricated in 0.13 μm BiCMOSprocess. The simulation results of the proposed attenuator achieves 6.67 dB insert loss, the input power ofminimum attenuation and maximum attenuation at 1 dB compression point are 15.5 dBm and 21 dBm at 10 GHz.
出处
《电子与封装》
2017年第4期16-19,29,共5页
Electronics & Packaging