两种磁路结构的高速磁调谐滤波器设计

Two Magnetic Circuits Designs for High Tuning Speed Magnetic Tunable Filter

文中对影响磁调谐滤波器调谐速度的因素进行了分析,针对涡流损耗、调谐线圈电感、磁滞损耗这三个妨碍磁调谐器件调谐速度提高的主要因素,采用低涡流、低电感、低磁滞设计技术,基于相同的体积、功耗设计了叠片和块状两种磁路,在9 GHz~10 GHz内均实现了高速调谐(≤310μs/GHz),给出了磁调谐带阻滤波器的典型响应曲线和调谐速度测试曲线,并对其实验结果进行了对比分析,实例证明了该设计方案的有效性。该研究对高速磁调谐滤波器的多样化设计具有一定指导意义和参考价值。

In this paper, the main factors that affect the tuning speed of magnetic tunable filters are analyzed. In view of the eddy current loss, inductance of tuning coil and hysteresis loss, which are the three main factors that preventing the high tuning speed of magnetic tunable filters, the design technology of low eddy current, low inductance and low hysteresis is adopted. Based on the same filter size and power consumption, the two magnetic circuits: laminate and bulk types are designed to achieve high tuning speed(≤310 μs/GHz) within the frequency range of 9 GHz~10 GHz. The typical response curves and tuning speed test curves are given, and the test data are compared and analyzed, which show the effectiveness of this designing method.This research provides certain guiding significance and reference value for various designs of high tuning speed magnetic tunable filter.