CN1145696A - Dielectric resonator, dielectric filter using same, and manufacturing method thereof - Google Patents

Dielectric resonator, dielectric filter using same, and manufacturing method thereof Download PDF

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CN1145696A
CN1145696A CN 96190071 CN96190071A CN1145696A CN 1145696 A CN1145696 A CN 1145696A CN 96190071 CN96190071 CN 96190071 CN 96190071 A CN96190071 A CN 96190071A CN 1145696 A CN1145696 A CN 1145696A
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electrode
molded body
ground electrode
island
dielectric
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中久保英明
相泽公男
田中正治
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2056—Comb filters or interdigital filters with metallised resonator holes in a dielectric block
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/04—Coaxial resonators

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  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Structures For Mounting Electric Components On Printed Circuit Boards (AREA)

Abstract

本发明提供一种小型高性能电介质谐振器。为达到此目的，本发明包括电介质材料制成的成型体(1)、通孔(2)、第一、第二接地电极(3a、3b)和内导体(4)，有一端面为开放端面(5)，另一端面为设置第二接地电极(3b)的终端面(6)，通孔(2)在开放端面(5)一侧为大直径部(15)，与该大直径部(15)相对的开放端面(5)一侧的侧面设置岛状电极(8)。

The invention provides a small-sized high-performance dielectric resonator. To achieve this purpose, the present invention comprises a molded body (1) made of a dielectric material, a through hole (2), first and second ground electrodes (3a, 3b) and an inner conductor (4), and one end face is an open end face ( 5), the other end face is the terminal face (6) that is provided with the second ground electrode (3b), and the through hole (2) is a large-diameter portion (15) on the open end face (5) side, and the large-diameter portion (15) ) is provided with an island-shaped electrode (8) on the side of the opposite open end face (5).

Description

电介质谐振器、用它构成的 电介质滤波器及其制造方法Dielectric resonator, dielectric filter made of same, and manufacturing method thereof

本发明涉及主要是高频无线设备等用到的电介质谐振器、用它构成的电介质滤波器以及该电介质滤波器的制造方法。The present invention relates to a dielectric resonator mainly used in high-frequency radio equipment and the like, a dielectric filter constituted by the same, and a method for manufacturing the dielectric filter.

以下现有的电介质谐振器如图8、图9所示，具有电介质材料制成的成型体30，由该成型体30的开放端面35贯通至终端面36的通孔31，在成型体30的侧面由导体覆盖形成的第一接地电极32，在通孔31的内周面覆盖导体形成的内导体34，在成型体30的终端面36上覆盖导体形成的并与上述第一接地电极32和内导体34连接的第二接地电极33。在成型体30侧面的开放端面35一侧设有非电极形成部37，并且在此非电极形成部37内设有岛状电极38。而且，通过如上构成，构成了如图10所示的LC并联谐振电路40。As shown in Fig. 8 and Fig. 9, the following existing dielectric resonators have a molded body 30 made of a dielectric material. The open end surface 35 of the molded body 30 penetrates to the through hole 31 of the terminal surface 36. In the molded body 30 The first ground electrode 32 formed by covering the side surface with a conductor, the inner conductor 34 formed by covering the conductor on the inner peripheral surface of the through hole 31, and the inner conductor 34 formed by covering the conductor on the terminal surface 36 of the molded body 30 and combined with the above-mentioned first ground electrode 32 and The inner conductor 34 is connected to the second ground electrode 33 . A non-electrode forming portion 37 is provided on the side of the open end surface 35 of the molded body 30 , and an island-shaped electrode 38 is provided in the non-electrode forming portion 37 . Furthermore, with the above configuration, an LC parallel resonant circuit 40 as shown in FIG. 10 is constructed.

上述构成中，由岛状电极38和内导体34构成的如图10所示的陷波电容39，其容量与岛状电极38大小成正比。因而，为了构成较大的陷波电容39，需要加大岛状电极38，但陷波电容39受电介质谐振器大小的制约，无法得到某些场合所需要的大小的陷波电容39。进而因此有高频波特性不够充分的问题。In the above configuration, the notch capacitor 39 constituted by the island electrode 38 and the inner conductor 34 as shown in FIG. 10 has a capacity proportional to the size of the island electrode 38 . Therefore, in order to form a larger notch capacitor 39, the island electrode 38 needs to be enlarged, but the notch capacitor 39 is restricted by the size of the dielectric resonator, and the notch capacitor 39 of the required size cannot be obtained in some occasions. Furthermore, there is a problem that high-frequency wave characteristics are not sufficient due to this.

本发明目的在于解决这种问题，提供一种高性能电介质谐振器。The purpose of the present invention is to solve this problem and provide a high-performance dielectric resonator.

为了达到此目的，本发明设有设在电介质谐振器上的通孔，开放端面一侧大直径部和终端面一侧小直径部，在电介质谐振器侧面与所述大直径部的内导体相对的部分设有与第一接地电极隔离的岛状电极。To achieve this purpose, the present invention provides a through hole provided on the dielectric resonator, a large diameter portion on the end face side and a small diameter portion on the terminal face side are opened, and the inner conductor of the large diameter portion is opposed to the inner conductor of the large diameter portion on the side of the dielectric resonator. The part is provided with an island-shaped electrode isolated from the first ground electrode.

通过这样构成，本发明的电介质谐振器，就变成为与岛状电极相对的内导体是设置在大直径部上的，因而内导体和岛状电极的距离接近，不必加大岛状电极，就可以确保较大的陷波电容。进而由此获得高性能电介质谐振器。With this structure, in the dielectric resonator of the present invention, the internal conductor opposite to the island-shaped electrode is arranged on the large-diameter portion, so that the distance between the internal conductor and the island-shaped electrode is close, and the island-shaped electrode does not need to be enlarged. A larger notch capacitance can be ensured. Further, a high-performance dielectric resonator is thereby obtained.

图1是本发明第一实施例电介质谐振器的斜视图。Fig. 1 is a perspective view of a dielectric resonator according to a first embodiment of the present invention.

图2是该电介质谐振器的截面图。Fig. 2 is a cross-sectional view of the dielectric resonator.

图3是该电介质谐振器的等效电路图。Fig. 3 is an equivalent circuit diagram of the dielectric resonator.

图4是在安装基板上安装该电介质谐振器时的截面图。Fig. 4 is a cross-sectional view when the dielectric resonator is mounted on a mounting substrate.

图5是本发明第二实施例电介质滤波器的斜视图。Fig. 5 is a perspective view of a dielectric filter according to a second embodiment of the present invention.

图6是该电介质滤波器的等效电路图。Fig. 6 is an equivalent circuit diagram of the dielectric filter.

图7是详示该电介质滤波器的分解斜视图。Fig. 7 is an exploded perspective view showing the dielectric filter in detail.

图8是现有电介质谐振器的截面图。Fig. 8 is a cross-sectional view of a conventional dielectric resonator.

图9是该电介质谐振器的截面图。Fig. 9 is a cross-sectional view of the dielectric resonator.

图10是该电介质谐振器的等效电路图。Fig. 10 is an equivalent circuit diagram of the dielectric resonator.

(实施例1)(Example 1)

图1、图2中，电介质谐振器包括以下组成：具有从开放端面5至终端面6贯通的通孔2，由电介质制成的成型体1；设于该成型体1外周侧面的第一接地电极3a；设于上述通孔2内的内导体4；设于上述成型体1的终端面6，并与上述第一接地电极3a和内导体4连接的第二接地电极3b。上述通孔2具有开放端面5一侧的大直径部15和终端面6一侧的小直径部16，在上述成型体1的某一侧面与上述大直径部15相对的部分设有非电极形成部7，并在该非电极形成部7内设有与上述第一接地电极3a隔离的岛状电极8。In Fig. 1 and Fig. 2, the dielectric resonator includes the following components: a molded body 1 made of a dielectric with a through hole 2 penetrating from the open end face 5 to the terminal face 6; An electrode 3a; an inner conductor 4 provided in the through hole 2; a second ground electrode 3b provided on the terminal surface 6 of the molded body 1 and connected to the first ground electrode 3a and the inner conductor 4. The above-mentioned through hole 2 has a large-diameter portion 15 on one side of the open end face 5 and a small-diameter portion 16 on the side of the terminal face 6, and a non-electrode formation is provided on a side of the molded body 1 opposite to the above-mentioned large-diameter portion 15. part 7, and in the non-electrode forming part 7, an island-shaped electrode 8 is provided which is isolated from the above-mentioned first ground electrode 3a.

这样构成的电介质谐振器如图3所示，是通过使第一接地电极3a接地，构成LC并联谐振电路10，并且岛状电极8与内导体4构成一通过电介质构成的陷波电容11，该陷波电容11是与上述LC并联谐振电路10串联连接的器件。The dielectric resonator constituted in this way is as shown in FIG. 3 , by making the first ground electrode 3a grounded to form an LC parallel resonant circuit 10, and the island-shaped electrode 8 and the inner conductor 4 form a trap capacitor 11 formed by a dielectric. The notch capacitor 11 is a device connected in series with the above-mentioned LC parallel resonance circuit 10 .

上述通孔2由开放端面5一侧的大直径部15和终端面6一侧的小直径部16构成，电介质谐振器的阻抗在通孔2内是变化的，因而，可以缩短电介质谐振器长。此外，与上述大直径部15相对的位置构成有岛状电极8，因而内导体4与岛状电极8的距离接近，因而不必加大岛状电极8，就可以确保大的陷波电容11。Above-mentioned through-hole 2 is made up of the large-diameter part 15 of opening end face 5 side and the small-diameter part 16 of terminal face 6 side, and the impedance of dielectric resonator changes in through-hole 2, therefore, can shorten the length of dielectric resonator. . In addition, since the island-shaped electrode 8 is formed at a position opposite to the large-diameter portion 15, the distance between the inner conductor 4 and the island-shaped electrode 8 is close. Therefore, a large notch capacitance 11 can be ensured without enlarging the island-shaped electrode 8.

包含岛状电极8的非电极形成部7上利用玻璃保护层设置电极保护膜9，并且在上述岛状电极8上除周边部分之外设有电极保护膜未形成部27。这样设置电极保护膜9，可以提高岛状电极8相对成型体1的密接强度，而且焊接岛状电极8的时候，由于该岛状电极8的端部为电极保护膜9所覆盖，因而没有焊锡流入，不容易引起电极剥离等，可以提供可靠性高的电介质谐振器。The electrode protection film 9 is provided on the non-electrode formation part 7 including the island electrode 8 with a glass protective layer, and the electrode protection film non-formed part 27 is provided on the island electrode 8 except for the peripheral part. Arranging electrode protection film 9 in this way can improve the bonding strength of island-shaped electrode 8 relative to molded body 1, and when welding island-shaped electrode 8, because the end of this island-shaped electrode 8 is covered by electrode protection film 9, there is no soldering. Inflow is less likely to cause electrode peeling, etc., and a highly reliable dielectric resonator can be provided.

另外，本实施例中在岛状电极8和非电极形成部7上设电极保护膜9，但该电极保护膜9一直设置到位于岛状电极8外围的第一接地电极3a端部的话，还可以防止第一接地电极3a端部电极剥离，进而可以提供可靠性更高的电介质谐振器。In addition, in this embodiment, the electrode protection film 9 is provided on the island-shaped electrode 8 and the non-electrode forming part 7, but if the electrode protection film 9 is provided all the way to the end of the first ground electrode 3a located on the periphery of the island-shaped electrode 8, the Electrode separation at the end of the first ground electrode 3a can be prevented, and a more reliable dielectric resonator can be provided.

图4是将图1-图3所示的电介质谐振器安装在安装基板14上构成电介质滤波器的场合。FIG. 4 shows a case where the dielectric resonator shown in FIGS. 1 to 3 is mounted on a mounting substrate 14 to form a dielectric filter.

这种场合，安装基板14上设有接地铜箔12a和连接铜箔12b，用软熔焊锡13同时连接接地铜箔12a与电介质谐振器的第一接地电极3a，以及连接铜箔12b与岛状电极8的电极保护膜未形成部27。In this case, the ground copper foil 12a and the connection copper foil 12b are provided on the mounting substrate 14, and the ground copper foil 12a and the first ground electrode 3a of the dielectric resonator are simultaneously connected with the reflow solder 13, and the connection copper foil 12b and the island-shaped Electrode protective film non-formed portion 27 of electrode 8 .

(实施例2)(Example 2)

以下参照附图说明本发明第二实施例。A second embodiment of the present invention will be described below with reference to the drawings.

第二实施例中，如图5所示，在安装基板22上安装电介质谐振器21a、21b，构成图6所示的带阻滤波器。In the second embodiment, as shown in FIG. 5 , dielectric resonators 21 a and 21 b are mounted on a mounting substrate 22 to form a band rejection filter shown in FIG. 6 .

上述安装基板22上设有连接铜箔23a、23b和接地铜箔25，上述连接铜箔23a、23b由空心线圈24相连。而且，如图7所示，上述安装基板22表面上设有保护层图案26，该保护层图案26与上述连接铜箔23a、23b和接地铜箔25相对应部分设有保护层未形成部28、29。The mounting substrate 22 is provided with connecting copper foils 23 a, 23 b and a grounding copper foil 25 , and the connecting copper foils 23 a, 23 b are connected by an air-core coil 24 . Moreover, as shown in FIG. 7, a protective layer pattern 26 is provided on the surface of the above-mentioned mounting substrate 22, and a protective layer unformed portion 28 is provided on the corresponding part of the protective layer pattern 26 to the above-mentioned connecting copper foils 23a, 23b and the grounding copper foil 25. , 29.

上述电介质谐振器21a、21b与第一实施例中说明的电介质谐振器相同构成。The above-mentioned dielectric resonators 21a and 21b have the same configuration as the dielectric resonator described in the first embodiment.

如图7所示在安装基板22上安装电介质谐振器21a、21b的场合，用软熔焊料使电介质谐振器21a、21b的第一接地电极3a与安装基板22的保护层未形成部29连接，并且用软熔焊料使电介质谐振器21a、21b的电极保护膜未形成部27与安装基板22的保护层未形成部28连接。这时，通过使上述电极保护膜未形成部27与保护层未形成部28相同形状，在安装基板22上安装电介质谐振器21a、21b时，即便利用软熔组装，也可以防止电介质谐振器21a、21b位移，可以高精度组装。When the dielectric resonators 21a, 21b are mounted on the mounting substrate 22 as shown in FIG. Furthermore, the portion 27 of the dielectric resonators 21a and 21b where no electrode protective film is formed is connected to the portion 28 of the mounting substrate 22 where no protective layer is formed by using reflowed solder. At this time, by making the electrode protection film-unformed portion 27 and the protective layer-unformed portion 28 have the same shape, when the dielectric resonators 21a and 21b are mounted on the mounting substrate 22, the dielectric resonator 21a can be prevented from being damaged even by reflow assembly. , 21b displacement, can be assembled with high precision.

综上所述，按照本发明，与岛状电极相向的内导体是设置在大直径部上的，因而内导体与岛状电极的距离接近，不必加大岛状电极，就可以确保较大的陷波电容，而且在电介质谐振器通孔内，电介质谐振器的阻抗是在通孔2内变化的，因而可以缩短电介质谐振器长，从而可以提供高性能电介质谐振器。In summary, according to the present invention, the internal conductor facing the island-shaped electrode is arranged on the large-diameter portion, so that the distance between the internal conductor and the island-shaped electrode is close, and it is not necessary to enlarge the island-shaped electrode to ensure a larger Notch capacitance, and in the dielectric resonator through hole, the impedance of the dielectric resonator is changed in the through hole 2, so the length of the dielectric resonator can be shortened, thereby providing a high performance dielectric resonator.

Claims (7)

1.一种电介质谐振器，其特征在于，包括以下组成：具有从开放端面至终端面贯通的通孔、由电介质制成的成型体；设于该成型体外周侧面的第一接地电极；设于所述通孔内的内导体；设于所述成型体终端面、并连接所述第一接地电极和内导体的第二接地电极，所述通孔具有开放端面一侧的大直径部和终端面一侧的小直径部，在所述成型体的某一侧面与所述大直径部相对的部分设置与所述第一接地电极隔离的岛状电极。1. A dielectric resonator, characterized in that it comprises the following components: a molded body having a through hole passing through from an open end face to a terminal face, and made of a dielectric; a first ground electrode arranged on the peripheral side of the molded body; an inner conductor in the through hole; a second ground electrode provided on the terminal surface of the molded body and connected to the first ground electrode and the inner conductor; the through hole has a large diameter portion on one side of the open end surface and The small-diameter part on the side of the terminal face is provided with an island-shaped electrode isolated from the first ground electrode on a part of one side of the molded body opposite to the large-diameter part. 2.一种电介质谐振器，其特征在于，包括以下组成：具有从开放端面至终端面贯通的通孔、由电介质制成的成型体；设于该成型体外周侧面的第一接地电极；设于所述通孔内的内导体；设于所述成型体终端面、并连接所述第一接地电极和内导体的第二接地电极，所述通孔具有开放端面一侧的大直径部和终端面一侧的小直径部，在所述成型体的某一侧面与所述大直径部相对的部分设置与所述第一接地电极隔离的岛状电极，由绝缘体制成的电极保护膜覆盖该岛状电极外周端部。2. A dielectric resonator, characterized in that it comprises the following components: a molded body having a through hole passing through from an open end face to a terminal face, and made of a dielectric; a first ground electrode arranged on the peripheral side of the molded body; an inner conductor in the through hole; a second ground electrode provided on the terminal surface of the molded body and connected to the first ground electrode and the inner conductor; the through hole has a large diameter portion on one side of the open end surface and The small-diameter portion on one side of the terminal surface, an island-shaped electrode isolated from the first ground electrode is provided on a side of the molded body opposite to the large-diameter portion, covered by an electrode protective film made of an insulator The peripheral end of the island-shaped electrode. 3.一种电介质谐振器，其特征在于，包括以下组成：具有从开放端面至终端面贯通的通孔、由电介质制成的成型体；设于该成型体外周侧面的第一接地电极；设于所述通孔内的内导体；设于所述成型体终端面、并连接所述第一接地电极和内导体的第二接地电极，所述通孔具有开放端面一侧的大直径部和终端面一侧的小直径部，在所述成型体的某一侧面与所述大直径部相对的部分设置与所述第一接地电极隔离的岛状电极，由绝缘体制成的电极保护膜覆盖该岛状电极外周端部和位于该岛状电极外边的第一接地电极端部。3. A dielectric resonator, characterized in that it comprises the following components: a molded body having a through hole passing through from an open end face to a terminal face, and made of a dielectric; a first ground electrode arranged on the peripheral side of the molded body; an inner conductor in the through hole; a second ground electrode provided on the terminal surface of the molded body and connected to the first ground electrode and the inner conductor; the through hole has a large diameter portion on one side of the open end surface and The small-diameter portion on one side of the terminal surface, an island-shaped electrode isolated from the first ground electrode is provided on a side of the molded body opposite to the large-diameter portion, covered by an electrode protective film made of an insulator The peripheral end of the island-shaped electrode and the end of the first ground electrode located outside the island-shaped electrode. 4.一种电介质滤波器，其特征在于，包括安装基板和安装在该安装基板上的电介质谐振器，所述电介质谐振器包括以下组成：具有从开放端面至终端面贯通的通孔、由电介质制成的成型体；设于该成型体外周侧面的第一接地电极；设于所述通孔内的内导体；设于所述成型体终端面、并连接所述第一接地电极和内导体的第二接地电极，所述通孔具有开放端面一侧的大直径部和终端面一侧的小直径部，在所述成型体的某一侧面与所述大直径部相对的部分设置与所述第一接地电极隔离的岛状电极，所述安装基板在表面上具有连接铜箔、接地铜箔和覆盖所述连接铜箔的电极保护膜，所述连接铜箔上与所述电介质谐振器岛状电极相对应部分设置与岛状电极露出部大致相同形状的电极保护膜未形成部。4. A dielectric filter, characterized in that it comprises a mounting substrate and a dielectric resonator mounted on the mounting substrate, wherein the dielectric resonator comprises the following components: a through hole penetrating from an open end face to a terminal face, made of a dielectric The molded body produced; the first ground electrode arranged on the peripheral side of the molded body; the inner conductor arranged in the through hole; arranged on the terminal surface of the molded body and connected to the first ground electrode and the inner conductor The second ground electrode, the through hole has a large-diameter portion on the side of the open end face and a small-diameter portion on the side of the terminal face, and a portion opposite to the large-diameter portion on one side of the molded body is provided. An island-shaped electrode isolated from the first ground electrode, the mounting substrate has a connecting copper foil, a grounding copper foil, and an electrode protection film covering the connecting copper foil on the surface, and the connecting copper foil is connected to the dielectric resonator The portion corresponding to the island-shaped electrode is provided with an electrode protection film-unformed portion having substantially the same shape as the exposed portion of the island-shaped electrode. 5.如权利要求4所述的电介质滤波器，其特征在于，由绝缘体制成的电极保护膜覆盖设于电介质谐振器上的岛状电极的外周端部。5. The dielectric filter according to claim 4, wherein the electrode protective film made of an insulator covers the outer peripheral ends of the island-shaped electrodes provided on the dielectric resonator. 6.如权利要求5所述的电介质滤波器，其特征在于，由绝缘体制成的电极保护膜覆盖位于电介质谐振器上所设的岛状电极外边的第一接地电极的端部。6. The dielectric filter according to claim 5, wherein an electrode protective film made of an insulator covers an end of the first ground electrode located outside the island-shaped electrode provided on the dielectric resonator. 7.一种电介质滤波器制造方法，其特征在于，所述电介质滤波器包括安装基板和安装在该安装基板上的电介质谐振器，所述电介质谐振器包括以下组成：具有从开放端面至终端面贯通的通孔、由电介质制成的成型体；设于该成型体外周侧面的第一接地电极；设于所述通孔内的内导体；设于所述成型体终端面、并连接所述第一接地电极和内导体的第二接地电极，所述通孔具有开放端面一侧的大直径部和终端面一侧的小直径部，在所述成型体的某一侧面与所述大直径部相对的部分设置与所述第一接地电极隔离的岛状电极，所述安装基板在表面上具有连接铜箔、接地铜箔和覆盖所述连接铜箔的电极保护膜，所述连接铜箔上与所述电介质谐振器岛状电极相对应部分设置与岛状电极露出部大致相同形状的电极保护膜未形成部，利用软熔焊料同时进行所述电介质谐振器的第一接地电极与所述安装基板接地铜箔的连接，和所述电介质谐振器岛状电极的露出部与所述安装基板连接铜箔的电极保护膜未形成部的连接。7. A method of manufacturing a dielectric filter, characterized in that the dielectric filter includes a mounting substrate and a dielectric resonator mounted on the mounting substrate, and the dielectric resonator comprises the following components: a A through hole, a molded body made of a dielectric; a first ground electrode disposed on the peripheral side of the molded body; an inner conductor disposed in the through hole; disposed on the terminal surface of the molded body and connected to the The first ground electrode and the second ground electrode of the inner conductor, the through hole has a large diameter portion on the side of the open end face and a small diameter portion on the side of the terminal face, and on one side of the molded body and the large diameter portion The part opposite to the first ground electrode is provided with an island-shaped electrode isolated from the first ground electrode. The mounting substrate has a connecting copper foil, a grounding copper foil, and an electrode protection film covering the connecting copper foil on the surface. The connecting copper foil On the part corresponding to the island-shaped electrode of the dielectric resonator, an electrode protection film non-formed part having approximately the same shape as the exposed part of the island-shaped electrode is provided, and the first ground electrode of the dielectric resonator and the first ground electrode of the dielectric resonator are connected to the The connection of the ground copper foil of the mounting substrate and the connection of the exposed portion of the dielectric resonator island electrode and the non-electrode protection film-formed portion of the mounting substrate connection copper foil.
CN 96190071 1995-02-03 1996-02-02 Dielectric resonator, dielectric filter using same, and manufacturing method thereof Pending CN1145696A (en)

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JP1685095A JPH08213810A (en) 1995-02-03 1995-02-03 Dielectric resonator

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CN1331727C (en) * 2003-06-10 2007-08-15 索尼株式会社 Micromachine production method

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