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电子机械滤波器的思想很早就有了,随着不断地对电子机械滤波器结构方面精细的研究以及新材料的发现和工艺方面飞速的进步,现在这些滤波器己适用于通信系统了.本文讨论实际的结构技术和设计,并且叙述某些滤波器装置的性能.基本的设计问题是给出一种振动结构,在经济上达到所要求的性能.因为机械振动传播速度比电磁波传播速度低,故在设计讨论中,微波频率的电子滤波器,较之集总电路滤波器来说(比如100千赫)是倾向于用前者的.因此,工作就在两个主要的方面进行.第一是找出合适的振动结构,主要的标准是不严格的,能避免寄生的或不希望的振荡模和有效地防止电击和大气振动.并且有合适的形状和大小,适宜低成本生产.第二是求解设计中的数学问题,当电子机械滤波器的性能从本质上接近理论最佳状态时,求解数学问题是复杂的.
The idea of electromechanical filters existed very early, and with the continuous refinement of the structure of electromechanical filters and the rapid advances in the discovery of new materials and processes, these filters have now been adapted to communication systems. Discusses practical structural techniques and designs and describes the performance of some filter devices.The basic design issue is to give a vibrating structure that economically achieves the required performance.Because the mechanical vibration propagation velocity is lower than the electromagnetic wave propagation velocity, Therefore, in the design discussion, the microwave frequency of the electronic filter, compared with the lumped circuit filter (such as 100 kHz) is inclined to use the former.Therefore, the work is carried out in two main aspects.First is Find the appropriate vibration structure, the main criteria are not strict, to avoid parasitic or unwanted oscillation mode and effectively prevent electric shock and atmospheric vibration and has the appropriate shape and size, suitable for low-cost production. The second is Solving math problems in design is complicated to solve mathematical problems when the performance of the electromechanical filter is essentially close to the theoretical best.