吸波材料对微带隔离器磁感应强度分布及电性能的影响

Effect of absorbing materials on the magnetic induction intensity distribution and electrical performance of microstrip isolator

为了避免T/R组件受电磁干扰而影响正常工作,通常要加吸波片进行电磁屏蔽,吸波片会影响T/R组件中的微带隔离器电性能。以一种工作在K波段的微带隔离器为对象,利用试验腔体,在永磁体上方设置吸波材料片,考察永磁体距离吸波材料不同高度时的磁感应强度、永磁体对吸波片的吸力及隔离器的电性能。结果表明,当吸波材料距离永磁体上方2 mm时,对K波段微带隔离器电性能基本没有影响,为T/R组件中电磁屏蔽吸波片的空间设计提供参考。

In order to prevent the T/R module from being affected by electromagnetic interference,it is usually necessary to add an absorber for electromagnetic shielding,and the absorber will affect the electrical performance of the microstrip isolator in the T/R module.Taking a microstrip isolator working in K-band as the object,absorbing material was set above the permanent magnet by using the experimental cavity,the magnetic induction intensity and suction force of the permanent magnet at different heights from the absorbing material,and the electrical performance of the isolator were investigated.The results show that when the distance of the absorbing material is 2mm above the permanent magnet,the electrical performance of the K-band microstrip isolator is basically not affected,which provides a reference for the spatial design of the spatial design of the magnetic shield absorbing plate in T/R module.