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公开(公告)号：US3517350A
公开(公告)日：1970-06-23
申请号：US3517350D
申请日：1969-07-07
Applicant: BELL TELEPHONE LABOR INC
Inventor： BEAVER WILLIAM D
CPC classification number: H03H9/566
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2.发明授权Monolithic piezoelectric filter having mass loaded electrodes for resonation regions acoustically coupled together 失效具有大量负载电极的谐振压电式滤波器，用于共振区域与声音耦合的接口
公开(公告)号：US3564463A
公开(公告)日：1971-02-16
申请号：US3564463D
申请日：1966-06-17
Applicant: BELL TELEPHONE LABOR INC
Inventor： BEAVER WILLIAM D , SYKES ROGER A
CPC classification number: H03H9/566
Abstract: ENERGY IS TRANSMITTED OVER A DESIRED BAND BY APPLYING IT TO A PAIR OF ELECTRODES MOUNTED ON A CRYSTAL BODY AND REMOVING IT FROM ANOTHER PAIR OF ELECTRODES MOUNTED ON THE CRYSTAL BODY. THE ELECTRODES HAVE SUFFICIENT MASSES TO CONCENTRATE THICKNESS SHEAR VIBRATIONS IN THE AREAS BETWEEN THE ELECTRODES. THE ELECTRODES ARE SPACED SUFFICIENTLY FAR FROM THE EDGES OF THE BODY SO AS TO SUBSTANTIALLY ELIMINATE THE EFFECTS OF THE EDGES. THE PAIRS OF ELECTRODES ARE SPACED SO AS TO COUPLE THE RESONATORS FORMED BY THE ELECTRODES AND THE BODY, BUT TO LIMIT THE COUPLING BELOW A GIVEN VALUE.
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