公开(公告)号：US3831116A

公开(公告)日：1974-08-20

申请号：US34960173

申请日：1973-04-09

申请人： RAYTHEON CO

发明人： DAVIS L ,  HOLLAND M

IPC分类号： H03H9/42 ,  H03H9/72 ,  H03H9/26 ,  H03B5/30 ,  H03H9/32

CPC分类号： H03H9/6403 ,  H03H9/42 ,  H03H9/72

摘要： An acoustic wave filter is disclosed in which a number of input/output transducers are mounted on a piezoelectric substrate upon which surface waves may propagate in a continuous manner. The substrate may consist of either a continuous surface where the surface waves can circulate or a planar substrate with reflectors at either end of the substrate so that the waves will reflect back and forth from end to end. With such a device, using a single input transducer and a plurality of output transducers or alternatively a plurality of input transducers and a single output transducer, a narrow-band filter may be realized. In the preferred embodiment, the input or output transducers may be switched in and out thereby switching in and out different frequency response peaks. The device may be embodied as a switchable frequency selection device in a multichannel transceiver.

摘要翻译： 公开了一种声波滤波器，其中多个输入/输出换能器安装在压电基片上，表面波可以在该压电基片上以连续的方式传播。 衬底可以由表面波可以循环的连续表面或具有在衬底的任一端的反射器的平面衬底组成，使得波将从端到端反复反射。 使用这样的装置，可以使用单个输入换能器和多个输出换能器，或者替代地，多个输入换能器和单个输出换能器，可以实现窄带滤波器。 在优选实施例中，可以切换输入或输出换能器，从而切换出不同的频率响应峰值。 该装置可以被实现为多通道收发器中的可切换频率选择装置。