旋磁非线性传输线原理分析和初步实验

作为一种特殊的宽带高功率微波源,旋磁非线性传输线(gyromagnetic nonlinear transmission lines, GNLTL)由于中心频率高、易于调频以及可以高重频运行等特点,得到了广泛的关注。为明确GNLTL的特殊工作机理,对比分析GNLTL与传统旋磁应用场景的不同之处。从微观磁化动力学入手,针对GNLTL产生微波的原因进行定性解释。搭建一套低功率的验证实验装置,重点针对实验场景构建、GNLTL设计进行介绍。实验得到微波信号的中心频率为750 MHz,3 dB波束带宽达12%,峰值功率为245 kW,初步验证了GNLTL的微波产生效果。

Principle analysis and preliminary experiment of the gyromagnetic nonlinear transmission lines

As a special kind of wideband high-power microwave source, the GNLTL (gyromagnetic nonlinear transmission lines) have drawn much attention due to the characteristics of high center frequency, easily implementation of frequency adjustment, high repetition frequency, etc. In order to clarify the special working mechanism of GNLTL, the differences between GNLTL and the traditional magnetic applications were compared and analyzed. Starting from the microscopic magnetization dynamics, a qualitative explanation was provided for the reasons of microwave generation at GNLTL. A low-power validation experimental setup was built, with a focus on introducing the construction of experimental scenarios and GNLTL design. Microwaves signals are generated in the experiment with a center frequency of 750 MHz, a 3 dB bandwidth of 12% and a peak power of 245 kW, the microwave generation effect of GNLTL is preliminary verified.