一种超宽带数字移相器设计方法

doi:10.3969/j.issn.1001-2400.2016.06.022

摘要/Abstract

摘要：

基于矢量合成理论，采用混合微波集成电路技术，提出了一种超宽带数字移相器的设计方法．该方法通过调节两路正交信号的幅度合成得到第一象限内不同幅相的矢量，采用三级级联的结构实现对输入信号的360°移相．运用此方法设计制作了一款超高频、超宽带6位数字移相器．该移相器在相对带宽57％的工作频带内，相位均方根误差小于3.8°，幅度不平衡度小于3.0dB，当应用在宽工作带宽、窄瞬时信号带宽的相控阵天线时，通过划分频带分段修正使幅度不平衡度降低到2.5dB以下，同时减小相位均方根误差至3.0°以下，满足某型相控阵天线的需求．

关键词: 矢量合成, 混合微波集成电路, 超宽带, 数字移相器, 相位均方根误差, 相控阵天线

Abstract:

Based on the vector sum theory, using the hybrid microwave integrated circuits (HMIC) technology, a novel method of designing Ultra-wideband digital phase shifter is proposed. By adjusting the magnitude of two orthogonal signals to obtain different amplitude and phase vectors in the first quadrant, this method adopts the structure of three-level cascade to realize a 360° phase shift of the input signal. Using this method, a UHF band ultra-wideband six bit digital phase shifter is designed and fabricated. In the working frequency band of the 57％ relative bandwidth, the phase shifter has the RMS phase error of less than 3.8°, and amplitude imbalance of less than 3.0dB. When applied in the phased arrays antenna, which has a wide working band and narrow instantaneous signal bandwidth, the amplitude imbalance is decreased to less than 2.5dB and the RMS phase error is reduced to less than 3.0°, by dividing the frequency band for piecewise correction. It meets the need of a certain type of phased array antenna.

Key words: vector sum, hybrid microwave integrated circuits, ultra-wideband, digital phase shifter, root mean square phase error, phased array antenna

张洪刚;刘洛琨;菅春晓;张先锋;郑小雨. 一种超宽带数字移相器设计方法[J]. 西安电子科技大学学报, 2016, 43(6): 129-134.

ZHANG Honggang;LIU Luokun;JIAN Chunxiao;ZHANG Xianfeng;ZHENG Xiaoyu. Novel design method for the ultra-wideband digital phase shifter[J]. Journal of Xidian University, 2016, 43(6): 129-134.

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