中国空间科学技术

中国空间科学技术

• •    

一种新型螺旋滤波器

殷新社   

  1. 西安空间无线电技术研究所
  • 发布日期:1995-06-25

A NEW TYPE OF HELICAL FILTER

Yin Xinshe(Xi'an institute of Space Radio Technology, Xi'an 710000)   

  • Online:1995-06-25

被引次数

6

摘要： 提出并实现了一种新的螺旋滤波器耦合结构。该滤波器的屏蔽外腔为圆筒形，螺旋谐振器被横向固定在圆筒内，谐振器间不再有膜片相隔，它们之间耦合的大小主要取决于谐振器间的相互间距和相对角度。这种滤波器不仅在结构上比普通螺旋滤波器简单，调节也更加方便；此外，它的设计带宽还可以比普通螺旋滤波器宽得多。文章列举了几组滤波器的实测结果，其中一组在不加任何特别措施的情况下，相对带宽作到了２７％，另有一组具有明显的带外衰减极点。

关键词: 带通滤波器, 螺旋滤波器, 耦合系数, 结构设计

Abstract: A new coupling structure for helical filters has been Presented.It is realized with a single cylindric shield, the belieal resonators are fixed transversely in the cylinder.No iris is necessary for separation between the resonators.The couplings between the resonators depend mainly on the distances and the angles between them. Compared with the general rectangular shield belieal filters,the new type is simpler in structure and easier to adjust. Besides these,the realizable bandwidth of the filter is fairly wide.Some experimental results for the filters are given,one has bandwidth of 27% without special measure employed,and another has two evident attenuation poles on either side of the passband.