公开(公告)号：EP1326333A2

公开(公告)日：2003-07-09

申请号：EP03003449.0

申请日：1997-11-28

Applicant: Oki Electric Industry Co., Ltd.

Inventor： Ehara, Hisanori ,  Noguchi, Kazushige ,  Shimamura, Hajime ,  Okada, Yoshio ,  Komazaki, Tomokazu

IPC: H03H9/64

CPC classification number: H03H9/725 ,  H03H7/0115 ,  H03H7/1708 ,  H03H7/1725 ,  H03H7/175 ,  H03H7/1758 ,  H03H7/1766 ,  H03H7/1775 ,  H03H7/1783 ,  H03H7/1791 ,  H03H7/38 ,  H03H9/0576 ,  H03H9/6483 ,  H03H9/72

Abstract: A surface-acoustic-wave filter couples a two-port surface-acoustic-wave resonator filter circuit coupled in parallel or in series with a two-port impedance circuit. The two-port impedance circuit has an impedance that creates a pole of attenuation, by making the open-circuit impedance of the surface-acoustic-wave filter equal to the short-circuit impedance. High attenuation over a wide range of stopband frequencies is obtained in this way, combined with steep roll-off between the passband and stopband.

Abstract translation: 表面声波滤波器将与双端口阻抗电路并联或串联耦合的两端口声表面波谐振器滤波器电路耦合。 双端口阻抗电路具有通过使表面声波滤波器的开路阻抗等于短路阻抗而产生衰减极点的阻抗。 以这种方式获得宽范围的阻带频率的高衰减，并结合通带和阻带之间的陡峭滚降。

公开(公告)号：EP0862266B1

公开(公告)日：2003-05-21

申请号：EP97120976.2

申请日：1997-11-28

Applicant: Oki Electric Industry Co., Ltd.

Inventor： Ehara, Hisanori ,  Noguchi, Kazushige ,  Shimamura, Hajime ,  Okada, Yoshio ,  Komazaki, Tomokazu

IPC: H03H9/64

CPC classification number: H03H9/725 ,  H03H7/0115 ,  H03H7/1708 ,  H03H7/1725 ,  H03H7/175 ,  H03H7/1758 ,  H03H7/1766 ,  H03H7/1775 ,  H03H7/1783 ,  H03H7/1791 ,  H03H7/38 ,  H03H9/0576 ,  H03H9/6483 ,  H03H9/72

公开(公告)号：EP1653613B1

公开(公告)日：2007-09-12

申请号：EP05110513.8

申请日：1997-02-07

Applicant: Oki Electric Industry Co., Ltd.

Inventor： Shimamura, Hajime

IPC: H03H9/05

CPC classification number: H03H9/1071 ,  H03H9/6433

公开(公告)号：EP1653613A1

公开(公告)日：2006-05-03

申请号：EP05110513.8

申请日：1997-02-07

Applicant: Oki Electric Industry Co., Ltd.

Inventor： Shimamura, Hajime

IPC: H03H9/05

CPC classification number: H03H9/1071 ,  H03H9/6433

Abstract: In a ceramic package (10) for a SAW (surface acoustic wave) filter, a metal pad (17) is formed on the bottom (10D) of a recess (10C) formed in the package (10). A SAW filter chip (31) is mounted to the package (10) such that propagation paths (33) formed on the chip (31) face the bottom (31D) of the recess (31C) with the intermediary of a gap. The gap promotes easy impedance adjustment.

Abstract translation: 在用于SAW（表面声波）滤波器的陶瓷封装（10）中，在形成在封装（10）中的凹部（10C）的底部（10D）上形成金属焊盘（17）。 SAW滤波器芯片（31）安装到封装（10）上，使得形成在芯片（31）上的传播路径（33）以间隙的方式面向凹部（31C）的底部（31D）。 间隙促进容易的阻抗调整。

公开(公告)号：EP1326333B1

公开(公告)日：2008-08-20

申请号：EP03003449.0

申请日：1997-11-28

Applicant: Oki Electric Industry Co., Ltd.

Inventor： Ehara, Hisanori ,  Noguchi, Kazushige ,  Shimamura, Hajime ,  Okada, Yoshio ,  Komazaki, Tomokazu

IPC: H03H9/64

CPC classification number: H03H9/725 ,  H03H7/0115 ,  H03H7/1708 ,  H03H7/1725 ,  H03H7/175 ,  H03H7/1758 ,  H03H7/1766 ,  H03H7/1775 ,  H03H7/1783 ,  H03H7/1791 ,  H03H7/38 ,  H03H9/0576 ,  H03H9/6483 ,  H03H9/72

公开(公告)号：EP1326333A3

公开(公告)日：2007-10-17

申请号：EP03003449.0

申请日：1997-11-28

Applicant: Oki Electric Industry Co., Ltd.

Inventor： Ehara, Hisanori ,  Noguchi, Kazushige ,  Shimamura, Hajime ,  Okada, Yoshio ,  Komazaki, Tomokazu

IPC: H03H9/64

CPC classification number: H03H9/725 ,  H03H7/0115 ,  H03H7/1708 ,  H03H7/1725 ,  H03H7/175 ,  H03H7/1758 ,  H03H7/1766 ,  H03H7/1775 ,  H03H7/1783 ,  H03H7/1791 ,  H03H7/38 ,  H03H9/0576 ,  H03H9/6483 ,  H03H9/72

Abstract: A surface-acoustic-wave filter couples a two-port surface-acoustic-wave resonator filter circuit coupled in parallel or in series with a two-port impedance circuit. The two-port impedance circuit has an impedance that creates a pole of attenuation, by making the open-circuit impedance of the surface-acoustic-wave filter equal to the short-circuit impedance. High attenuation over a wide range of stopband frequencies is obtained in this way, combined with steep roll-off between the passband and stopband.

公开(公告)号：EP0862266A3

公开(公告)日：1999-07-14

申请号：EP97120976.2

申请日：1997-11-28

Applicant: Oki Electric Industry Co., Ltd.

Inventor： Ehara, Hisanori ,  Noguchi, Kazushige ,  Shimamura, Hajime ,  Okada, Yoshio ,  Komazaki, Tomokazu

IPC: H03H9/64

CPC classification number: H03H9/725 ,  H03H7/0115 ,  H03H7/1708 ,  H03H7/1725 ,  H03H7/175 ,  H03H7/1758 ,  H03H7/1766 ,  H03H7/1775 ,  H03H7/1783 ,  H03H7/1791 ,  H03H7/38 ,  H03H9/0576 ,  H03H9/6483 ,  H03H9/72

Abstract: A surface-acoustic-wave filter couples a two-port surface-acoustic-wave resonator filter circuit coupled in parallel or in series with a two-port impedance circuit. The two-port impedance circuit has an impedance that creates a pole of attenuation, by making the open-circuit impedance of the surface-acoustic-wave filter equal to the short-circuit impedance. High attenuation over a wide range of stopband frequencies is obtained in this way, combined with steep roll-off between the passband and stopband.

公开(公告)号：EP0862266A2

公开(公告)日：1998-09-02

申请号：EP97120976.2

申请日：1997-11-28

Applicant: Oki Electric Industry Co., Ltd.

Inventor： Ehara, Hisanori ,  Noguchi, Kazushige ,  Shimamura, Hajime ,  Okada, Yoshio ,  Komazaki, Tomokazu

IPC: H03H9/64

CPC classification number: H03H9/725 ,  H03H7/0115 ,  H03H7/1708 ,  H03H7/1725 ,  H03H7/175 ,  H03H7/1758 ,  H03H7/1766 ,  H03H7/1775 ,  H03H7/1783 ,  H03H7/1791 ,  H03H7/38 ,  H03H9/0576 ,  H03H9/6483 ,  H03H9/72

Abstract: A surface-acoustic-wave filter couples a two-port surface-acoustic-wave resonator filter circuit coupled in parallel or in series with a two-port impedance circuit. The two-port impedance circuit has an impedance that creates a pole of attenuation, by making the open-circuit impedance of the surface-acoustic-wave filter equal to the short-circuit impedance. High attenuation over a wide range of stopband frequencies is obtained in this way, combined with steep roll-off between the passband and stopband.

Abstract translation: 表面声波滤波器将与双端口阻抗电路并联或串联耦合的两端口声表面波谐振器滤波器电路耦合。 双端口阻抗电路具有通过使表面声波滤波器的开路阻抗等于短路阻抗而产生衰减极点的阻抗。 以这种方式获得宽范围的阻带频率的高衰减，并结合通带和阻带之间的陡峭滚降。