公开(公告)号：WO1995030250A1

公开(公告)日：1995-11-09

申请号：PCT/US1995001676

申请日：1995-02-10

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  VANGALA, Reddy, R. ,  HOANG, Truc

IPC: H01P01/202

CPC classification number: H01P1/2136

Abstract: A ceramic duplex filter is provided. The duplex filter (10) has afilter body (12) of a dielectric material, and has a top (14), bottom (16) and side surfaces (18, 20, 22, and 24) with through-holes extending from the top (14) to the bottom surface (16). Receptacles are positioned adjacent to the top surface (14) with a conductive material therein. The surfaces (16, 18, 20, 22 and 24) are substantially covered with a conductive material defining a metallized layer (25), with the exception that the top surface (14) is substantially unmetallized. The receptacles include a conductive layer of material to define a certain capacitance. And, coupling devices (94, 96 and 98) for coupling signals into and out of the duplex filter (10) are provided. Shunt, series and coupling capacitors are strategically positioned adjacent to the top surface (14), which help to facilitate tuning of the filter.

Abstract translation: 提供陶瓷双工滤波器。 双相滤波器（10）具有电介质材料的非主体（12），并且具有顶部（14），底部（16）和侧表面（18,20,22和24），该顶表面（18,20,22和24）具有从顶部延伸的通孔 （14）到底面（16）。 插座被定位成与顶表面（14）相邻，导电材料在其中。 除了顶表面（14）基本上未金属化之外，表面（16,18,20,22和24）基本上被限定金属化层（25）的导电材料覆盖。 插座包括用于限定一定电容的材料的导电层。 并且，提供用于将信号耦合到和从双向滤波器（10）输出的耦合装置（94,96和98）。 分流器，串联和耦合电容器在顶部表面（14）附近有策略地定位，这有助于过滤器的调谐。

公开(公告)号：WO1995030249A1

公开(公告)日：1995-11-09

申请号：PCT/US1995001677

申请日：1995-02-10

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  HOANG, Truc ,  VANGALA, Reddy, R.

IPC: H01P01/201

CPC classification number: H01P1/2136

Abstract: A method of tuning a duplex filter (500). First, the center frequency of at least one filter of a duplex filter (10) is measured (502). Next, the difference between the measured center frequency and a desired center frequency is determined (504). And, third the duplex filter is tuned (506) by selectively removing a substantially planar layer of dielectric material for a top surface (14) of the filter (10), whereby the frequency characteristics are modified.

Abstract translation: 一种调整双工滤波器（500）的方法。 首先，测量双相滤波器（10）的至少一个滤波器的中心频率（502）。 接下来，确定测量的中心频率与期望中心频率之间的差异（504）。 并且，通过选择性地去除滤波器（10）的顶表面（14）的基本上平坦的电介质材料层，来调谐（506）第二双工滤波器，从而修改频率特性。

公开(公告)号：EP0706719A1

公开(公告)日：1996-04-17

申请号：EP95911658.0

申请日：1995-02-10

Applicant: MOTOROLA, INC.

Inventor： VANGALA, Reddy, R. ,  HOANG, Truc

IPC: H01G2 ,  H01G4 ,  H01P1 ,  H03H9

CPC classification number: H01P1/2136

Abstract: A ceramic duplex filter is provided. The duplex filter (10) has afilter body (12) of a dielectric material, and has a top (14), bottom (16) and side surfaces (18, 20, 22, and 24) with through-holes extending from the top (14) to the bottom surface (16). Receptacles are positioned adjacent to the top surface (14) with a conductive material therein. The surfaces (16, 18, 20, 22 and 24) are substantially covered with a conductive material defining a metallized layer (25), with the exception that the top surface (14) is substantially unmetallized. The receptacles include a conductive layer of material to define a certain capacitance. And, coupling devices (94, 96 and 98) for coupling signals into and out of the duplex filter (10) are provided. Shunt, series and coupling capacitors are strategically positioned adjacent to the top surface (14), which help to facilitate tuning of the filter.