360°模拟移相器平衡插入损耗和拓宽频带的研究

Study on the Insertion Loss Balancing and Bandwidth Expansion for 360°Analog Phase Shifter

本文论证了用电阻补偿法平衡 360°模拟移相器插入损耗波动的正确性 ,并推导出确定移相器频带宽度的目标函数 ,籍 CAD给出移相器在最大带宽条件下的有关设计参量 ,通过直观曲线为选择变容二极管作理论依据。采用微波集成电路工艺制作的模拟移相器在 1.3～ 2 .1GHz范围内可获得 360°连续可变相移 ,最大调相电压 18V,中心频率线性度优于± 2 .5% ,插入损耗波动小于 3d B。

The method of insertion loss balancing using resistance compensation for 360° analog phase shifter is analyzed in this paper.The objective function for the bandwidth of phase shifter is also deduced,and the optimum design parameters for maximum bandwidth are given by CAD.The analog phase shifter which uses hyperabrupt varactor chips is fabricated with MIC technology.In the frequency range of 1.3~2.1GHz,continuous variable phaseshift up to 360° and less than ±2.5% deviation from linearity can be obtained.The insertion loss fluctuation is less than 3dB.