JPH07106803A - Dielectric coaxial resonator and its mount structure - Google Patents

Abstract

PURPOSE:To obtain the dielectric coaxial resonator and its mount structure in which an area shared in a mount board is small, the mount density on the mount board is increased more, and direct connection is attained without parting a position of an externally connected electrode from an electrode of the mount board. CONSTITUTION:The dielectric coaxial resonator having a bottom face 6 through which a resonator hole 3 is made in face with a mount board is provided with external connection electrodes 5 to plural side faces or bottom faces 6, a member 12 comprising an electrode connecting to an outer conductor 4 of a dielectric block 2 and a projection section 13 inserted through the resonator hole 3. After the dielectric block 2 is adhered to the member 12 or connected to a printed circuit board 19 having an electrode pattern, the block 2 and the printed circuit board 19 are mounted on the mount board. Furthermore, metallic terminals 22, 23 are used to connect an outer connection electrode and an outer conductor 4 of the dielectric block 2 to the mount board 28 to fix the dielectric coaxial resonator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric coaxial resonator and its mounting structure.

[0002]

2. Description of the Related Art FIG. 8 shows a dielectric filter 1 which is an example of a conventional dielectric coaxial resonator. (A) is a perspective view seen from the side where the dielectric filter faces the mounting substrate, and (b) is a perspective view from a normal position. Also,
FIG. 9 is a view showing a state in which the dielectric filter 1 is cut along the axial direction of the resonator hole 3.

First, the structure of the dielectric filter 1 will be described. The rectangular parallelepiped dielectric block 2 made of a dielectric is provided so as to penetrate through the three resonator holes 3, and the surface of the dielectric block 2, that is, all six surfaces of the dielectric block 2 serves as a ground electrode. An electrode film-shaped outer conductor 4 is formed.

An electrode film is also formed on the inner peripheral surface of the hole 3 of the dielectric block 2, but the electrode film on one end side of the hole 3 is removed to provide a predetermined gap 29, which is separated by the gap 29. The electrode films are formed as the outer conductor 4 connected to the opening near the gap 29 and the inner conductor 18 connected to the other opening.

Further, the dielectric block 2 extends from a portion of the outer conductor 4 on the bottom surface facing the mounting substrate (not shown) to a side surface thereof, and serves as an external connection electrode for inputting / outputting signals for external coupling. A pair of 5 and 5 is formed and directly connected to the electrodes provided on the mounting substrate.

The input / output electrodes 5 and 5 extend from the side surface along the axial direction of the resonator hole 3 of the dielectric block 2 to the bottom surface facing the mounting substrate, and the gap 29 in each resonator hole at both ends of the resonator hole array. It is set up near. The external coupling capacitance is obtained between the inner conductor 18 near the gap 29 in the resonator hole.

The input / output electrodes 5 and 5 are generally extended from the bottom surface facing the mounting substrate to the side surfaces as shown in FIG. 8, but only on the bottom surface facing the mounting substrate (see FIG. (Not shown), and only on the side surface (not shown).

[0008]

By the way, in the prior art, when this type of dielectric filter 1 is mounted on the mounting substrate, the area occupied by the mounting substrate in FIG.
Since W) is relatively large, because of the relationship with other mounting parts,
There has been a problem that it is difficult to secure a necessary area when designing the arrangement of the dielectric filter 1 on the mounting substrate.

As for the mounting area, when the surface (T × W) through which the resonator hole 3 penetrates is opposed to the mounting substrate, the mounting area becomes smaller, but the input / output electrodes 5 and 5 are separated from the mounting substrate. Since it comes to the position, there is a problem that it cannot be directly connected to the mounting substrate.

In view of the above points, the object of the present invention is to reduce the area occupied by the mounting board to increase the mounting density on the mounting board and to improve the position of external connection electrodes such as input / output electrodes. The present invention aims to provide a dielectric coaxial resonator that can be directly connected to an electrode of a mounting substrate without separating from the electrode and a mounting structure thereof.

[0011]

According to a first aspect of the present invention, there is provided an outer conductor formed on an outer surface of a dielectric block and an inner conductor formed on an inner surface of a hole of the dielectric block. In a dielectric coaxial resonator that resonates at a frequency of, including a bottom surface that faces the mounting substrate and penetrates the resonator hole, a top surface that faces the bottom surface, and a plurality of side surfaces that are present between the bottom surface and the top surface. The external connection electrodes are provided on at least the plurality of side surfaces or the bottom surface.

According to another aspect of the present invention, the dielectric coaxial resonator has an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonates at a predetermined frequency. A bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface, and at least the external connection electrodes including the plurality of side surfaces. Alternatively, there is a mounting substrate having a dielectric coaxial resonator provided on the bottom surface and each electrode connecting the external connection electrode and the outer conductor of the dielectric block to a predetermined portion where the dielectric coaxial resonator is mounted, The bottom surface of the dielectric block is located on the mounting substrate, and the external connection electrodes and the outer conductors are connected to the electrodes of the mounting substrate, respectively.

According to another aspect of the present invention, there is provided a dielectric coaxial resonator having an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonating at a predetermined frequency. In a dielectric coaxial resonator, the dielectric coaxial resonator including a bottom surface that faces a mounting substrate and through which a resonator hole passes, a top surface that faces the bottom surface, and a plurality of side surfaces that are present between the bottom surface and the top surface. There is a member that forms an electrode that connects the outer conductor to a predetermined portion that joins the block and that has a protrusion that is inserted into the resonator hole of the dielectric block to obtain an external coupling capacitance, and the member has the The bottom surface of the dielectric block is located, the protrusion is inserted into the resonator hole, and the dielectric block is joined to the member.

According to another aspect of the present invention, the dielectric coaxial resonator has an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonates at a predetermined frequency. In the above, a predetermined surface for joining the dielectric block, including a bottom surface facing the mounting substrate and penetrating the resonator hole, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface. An electrode for connecting the outer conductor to a portion is formed, and the bottom surface of the dielectric block is provided on a member having a protrusion and an external connection electrode that are inserted into a resonator hole of the dielectric block to obtain external coupling capacitance. A dielectric coaxial resonator that is located and inserts the protrusion into the resonator hole to join the dielectric block to the member; and a predetermined portion where the dielectric coaxial resonator is mounted to the external portion of the member. Connection electrode There is a mounting substrate having electrodes for connecting the electrodes of the outer conductor, the bottom surface of the member that joins the dielectric coaxial resonator is located on the mounting substrate, and the external connection electrode of the member and the outer conductor are The electrodes to be connected and the respective electrodes of the mounting substrate are respectively connected.

According to another aspect of the present invention, the dielectric coaxial resonator has an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonates at a predetermined frequency. A bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface, and at least the external connection electrodes including the plurality of side surfaces. Alternatively, there is a printed wiring board having a dielectric coaxial resonator provided on the bottom surface and each pattern electrode connecting the external connection electrode of the dielectric block and the outer conductor, and the external connection electrode of the dielectric block and the external connection electrode. The outer conductor is connected to each of the pattern electrodes of the printed wiring board.

According to a sixth aspect of the present invention, there is provided a dielectric coaxial resonator having an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonating at a predetermined frequency. A bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface, and at least the external connection electrodes including the plurality of side surfaces. Alternatively, there is a printed wiring board having a dielectric coaxial resonator provided on the bottom surface and each pattern electrode connecting the external connection electrode of the dielectric block and the outer conductor, and the external connection electrode of the dielectric block. And a dielectric coaxial resonator for connecting the outer conductor to each of the pattern electrodes of the printed wiring board, and an electrode for connecting each of the pattern electrodes of the printed wiring board to a mounting portion. There is mounting substrate having, located in bottom the mounting substrate of the printed wiring board, wherein the mounting substrate and the respective pattern electrodes of the printed wiring board and each electrode is intended to be connected respectively.

According to a seventh aspect of the present invention, there is provided a dielectric coaxial resonator which has an outer conductor formed on an outer surface of the dielectric block and an inner conductor formed on an inner surface of the hole of the dielectric block and resonates at a predetermined frequency. A bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface, and at least the external connection electrode including the plurality of side surfaces. Alternatively, the dielectric coaxial resonator is fixed by being provided on the bottom surface and connecting the external connection electrode and the outer conductor of the dielectric block to each electrode provided on the mounting substrate using a metal terminal.

[0018]

According to the present invention, in claim 1, there is provided an outer conductor formed on the outer surface of the dielectric block, and an inner conductor formed on the inner surface of the hole of the dielectric block, and the resonator resonates at a predetermined frequency. In the body coaxial resonator, a bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, a plurality of side surfaces existing between the bottom surface and the top surface, and at least an external connection electrode are provided. By providing the plurality of side surfaces or the bottom surface, the external connection electrodes can be directly connected to the electrodes of the mounting substrate.

According to a second aspect of the present invention, there is provided a dielectric coaxial resonator having an outer conductor formed on an outer surface of the dielectric block and an inner conductor formed on an inner surface of the hole of the dielectric block, and resonating at a predetermined frequency. A bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface, and at least the external connection electrodes including the plurality of side surfaces. Alternatively, there is a mounting substrate having a dielectric coaxial resonator provided on the bottom surface and each electrode connecting the external connection electrode and the outer conductor of the dielectric block to a predetermined portion where the dielectric coaxial resonator is mounted, The bottom surface of the dielectric block is located on the mounting board, and the external connection electrodes and the outer conductors are connected to the electrodes of the mounting board, respectively. Click the area of T × W becomes, so that than the area of the conventional example (L × W) can be mounted in a small area.

According to another aspect of the present invention, the dielectric coaxial resonator has an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonates at a predetermined frequency. In a dielectric coaxial resonator, the dielectric coaxial resonator including a bottom surface that faces a mounting substrate and through which a resonator hole passes, a top surface that faces the bottom surface, and a plurality of side surfaces that are present between the bottom surface and the top surface. There is a member that forms an electrode that connects the outer conductor to a predetermined portion that joins the block and that has a protrusion that is inserted into the resonator hole of the dielectric block to obtain an external coupling capacitance, and the member has the The bottom surface of the dielectric block is located, the protrusion is inserted into the resonator hole, and the dielectric block is joined to the member, so that the external connection electrode is not provided on the surface of the block having the outer conductor. , So that it is mounted through the wood.

According to another aspect of the present invention, the dielectric coaxial resonator has an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonates at a predetermined frequency. In the above, a predetermined surface for joining the dielectric block, including a bottom surface facing the mounting substrate and penetrating the resonator hole, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface. An electrode for connecting the outer conductor to a portion is formed, and the bottom surface of the dielectric block is provided on a member having a protrusion and an external connection electrode that are inserted into a resonator hole of the dielectric block to obtain external coupling capacitance. A dielectric coaxial resonator that is located and that inserts the protrusion into the resonator hole to join the dielectric block to the member; and a predetermined portion of the member where the dielectric coaxial resonator is mounted. External connection electrode And a mounting substrate having electrodes for connecting the electrodes of the outer conductor, the bottom surface of the member that joins the dielectric coaxial resonator is located on the mounting substrate, and the external connection electrode of the member and the outer conductor. By connecting each electrode of the mounting board and the electrode connecting
Mounting area of the conventional dielectric block (L ×
W) It becomes possible to mount on the mounting board in the area of the following.

According to a fifth aspect of the present invention, the dielectric coaxial resonator has an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonates at a predetermined frequency. A bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface, and at least the external connection electrodes including the plurality of side surfaces. Alternatively, there is a printed wiring board having a dielectric coaxial resonator provided on the bottom surface and each pattern electrode connecting the external connection electrode of the dielectric block and the outer conductor, and the external connection electrode of the dielectric block and the external connection electrode. By connecting the outer conductor to each of the pattern electrodes of the printed wiring board, it is possible to connect dielectric blocks of different sizes with a certain pattern electrode provided. To become.

According to a sixth aspect of the present invention, a dielectric coaxial resonator having an outer conductor formed on an outer surface of the dielectric block and an inner conductor formed on an inner surface of the hole of the dielectric block and resonating at a predetermined frequency. A bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface, and at least the external connection electrodes including the plurality of side surfaces. Alternatively, there is a printed wiring board having a dielectric coaxial resonator provided on the bottom surface and each pattern electrode connecting the external connection electrode of the dielectric block and the outer conductor, and the external connection electrode of the dielectric block. And a dielectric coaxial resonator that connects the outer conductor to each of the pattern electrodes of the printed wiring board, and each of the pattern electrodes of the printed wiring board is connected to a mounting portion. There is a mounting board having electrodes, the bottom surface of the printed wiring board is located on the mounting board, and by connecting the respective pattern electrodes of the printed wiring board and the respective electrodes of the mounting board, respectively, the conventional example It can be installed in a smaller area than the area (L x W).

In the present invention, a dielectric coaxial resonator having an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block and resonating at a predetermined frequency. A bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface, and at least the external connection electrode including the plurality of side surfaces. Or provided on the bottom surface, by using a metal terminal to connect the external connection electrode and the outer conductor of the dielectric block to each electrode provided on the mounting substrate, by fixing the dielectric coaxial resonator,
It can be mounted in an area smaller than the mounting area (L × W) of the dielectric block of the conventional example, and the fixing strength can be increased as compared with the case of only soldering.

[0025]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a perspective view of a dielectric filter 24 in this embodiment. The dielectric filter 2
Reference numeral 4 denotes a rectangular hexahedron, which is present between a bottom surface 6 facing the mounting substrate and through which the resonator hole 3 penetrates, and a top surface 7 facing the bottom surface 6, a first side surface 8 and a second side surface. 9, a third side face 10, and a fourth side face 11 are included.

Similar to the conventional example, an inner conductor 18 in the form of an electrode film is formed on the inner peripheral surface of the resonator hole 3 of the dielectric block 2, and an electrode serving as a ground electrode is formed on the surface of the dielectric block 2. The film-shaped outer conductor 4 is formed.

The input / output electrodes 5, which are external connection electrodes,
5 is formed in the same electrode film shape as the outer conductor 4, and is provided at a position where the third side surface 10 and the fourth side surface 11 to the bottom surface 6 face each other, and can be directly connected to the electrodes of the mounting substrate. There is. In this dielectric block 2, the bottom surface 6 through which the resonator hole 3 penetrates is in contact with the mounting substrate, and the mounting area is T × W.
Therefore, the mounting area L × W of the conventional example shown in FIG.

(Embodiment 2) FIG. 2 is a perspective view of a dielectric filter 25 in this embodiment. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Also in the present embodiment, in the dielectric block 2, the bottom surface 6 through which the resonator hole 3 penetrates is in contact with the mounting substrate, and the input / output electrodes 5 and 5 which are external connection electrodes are extended from the first side surface 8 to the bottom surface 6. A pair is provided at a position where it can be directly connected to the electrode. Then, the bottom surface 6 in contact with the mounting substrate has a mounting area of T × W, and FIG.
It is kept smaller than the mounting area L × W of the conventional example shown in (b).

(Embodiment 3) FIG. 3 is a perspective view of a dielectric filter 26 in this embodiment. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Also in this embodiment, in the dielectric block 2, the bottom surface 6 through which the resonator hole 3 penetrates and the mounting substrate are in contact with each other, and the input / output electrodes 5 and 5 which are the external connection electrodes are formed first.
A pair is provided substantially diagonally from the side surface 8 and the second side surface 9 to the bottom surface 6 at positions where they can be directly connected to the electrodes of the mounting substrate. The bottom surface 6 in contact with the mounting substrate has a mounting area of T × W, which is smaller than the mounting area L × W of the conventional example shown in FIG. 8B.

In each of Examples 1, 2 and 3, the input / output electrodes 5 and 5 are provided from the side surface parallel to the axial direction of the resonator hole 3 of the dielectric block 2 to the bottom surface 6 facing the mounting substrate. Are provided near the gap 29 in each resonator hole 3 at both ends of the resonator hole row. Then, the external coupling capacitance is obtained between the inner hole 18 of the resonator hole 3 and the inner conductor 18 near the gap 29.

(Embodiment 4) FIG. 4A is a perspective view of the dielectric filter element 27 and the member 12 in this embodiment.
The dielectric filter element 27 is a rectangular parallelepiped, and the bottom surface 6 through which the resonator hole 3 penetrates faces the member 12. The member 12 includes a ground electrode 14 connected to the outer conductor 4 of the dielectric block 2 and an input / output electrode 15 serving as an external connection electrode.
In order to obtain the external coupling capacitance, two cylindrical protrusions 13 are provided to be inserted into the resonator holes 3 at both ends of the resonator hole row of the dielectric block 2. Similarly, the member 12 has a missing portion 17 to which a part of the dielectric block 2 including the bottom surface 6 through which the resonator hole 3 penetrates is joined. In the dielectric block 2, the member 12 mounted on the mounting substrate has two cylindrical protrusions 13 in order to obtain external coupling capacitance. No input / output electrodes are provided in the. The member 12 has a main body made of synthetic resin, and an electrode portion is plated or a metal plate is insert-molded. Although elastic pressure contact is used to bond the dielectric filter element 27 to the member 12, soldering may be used instead.

FIG. 4B shows a state in which the dielectric filter element 27 and the member 12 in FIG.
It is an A line sectional view. In the conventional example, between the inner conductor in the resonator hole and the input / output electrodes provided on the outer conductor of the dielectric block,
Formed the external coupling capacitance. However, in the present embodiment, the electrode film 16 is formed in the hole formed through the bottom surfaces of the two cylindrical protrusions 13, 13 of the member 12.
The electrode film 16 continues from the inside of the hole of the member 12 to the side surface through the bottom surface to become the input / output electrode 15, and when the dielectric filter element 27 and the member 12 are joined, the dielectric block 2 is formed.
An external coupling capacitance is generated between the inner conductor 18 and the inner conductor 18.

The electrode film 16 in the holes of the protrusions 13 and 13 may be formed by press-fitting a metal pin instead.

By suppressing the area occupied by the member 12 on the mounting substrate to be less than L × W of the dielectric block 2, a mounting area smaller than that of the conventional example can be obtained. In addition, the degree of fixing is enhanced when the dielectric block 2 is also attached to the member after being attached, as compared with the case where the dielectric block 2 is attached to the attachment substrate alone. Soldering is used to join the member and the mounting substrate.

(Embodiment 5) FIG. 5 is a perspective view in which the dielectric filter 24 in this embodiment is attached to a printed wiring board 19. The printed wiring board 19 has a dielectric block 2
An electrode for connecting the ground electrode and the input / output electrodes 5 and 5 is provided in a pattern in advance.

FIG. 6A is a top view of this printed wiring board 19, FIG. 6B is a front view, FIG. 6C is a bottom view, and FIG. 6D is a side view. The bottom surface of the dielectric block 2 is located in the portion surrounded by the broken line 35 in FIG. The upper surface of the printed wiring board 19 is covered with an electrode film 33 except for a constant gap portion 34 that prevents a short circuit between the ground electrode and the input / output electrode.
Then, the electrode film 33 further includes the gap 30 and the resist 30 (hatched portion in FIG. 6A) except for the portion 20 connecting the ground electrode and the portion 21 connecting the input / output electrodes of the dielectric block 2. ) Is covered. This is to prevent diffusion of solder when soldering the dielectric block 2 and the electrodes of the printed wiring board 19. The ground electrode and the input / output electrode are connected to each electrode on the bottom surface of the printed wiring board 19 through the electrode film 33 provided in the recess 36 on each side surface of the printed wiring board 19. Similar to the top surface, this bottom surface is also covered with the electrode film 33 except for a certain gap portion 34 that prevents a short circuit between the ground electrode and the input / output electrode. The electrode film 33 is further covered with the resist 30 (hatched portion in FIG. 6C) together with the gap portion 34 except the ground electrode 20 and the input / output electrode 21.

In FIG. 5, the printed wiring board 19 has an area equal to or smaller than L × W of the dielectric block 2, and several kinds of different size dielectric blocks can be connected by the electrode pattern of FIG. 6A. Note that soldering is also used to connect the printed wiring board 19 and the mounting board. As a result, the mounting area on the mounting substrate can be made smaller than in the conventional case, and constant pattern electrodes to which dielectric blocks of different sizes can be connected can be provided, so that the size of the printed wiring board can be standardized to some extent.

(Embodiment 6) FIG. 7A is a perspective view in which the dielectric filter 25 in this embodiment is mounted on a mounting substrate 28, and FIG. 7B is a line BB in FIG. 7A. FIG. In the present embodiment, the strip-shaped metal plate is placed 90 degrees outward from the center.
The outer conductor 4 and the input / output electrodes 5 and 5 of the dielectric block 2 are attached to the mounting substrate 2 by using the metal terminal 22 bent at an angle of 4 degrees.
8 are connected to the input / output electrode 31 and the ground electrode 32, respectively. Mounting area (T x
W) can be made small, and in addition to the direct connection with the electrodes 31 and 32 of the mounting substrate 28 by soldering,
You can select the terminal material with good solderability, and the mounting board 2
The connection with 8 is also strong.

Also, FIG. 7C is a sectional view of the same, but instead of the metal terminal 22, a metal terminal has a mounting substrate 28.
Contrary to the metal terminal 22, the metal terminal 23 is bent inside the bottom surface of the dielectric block 2 at an angle of 90 degrees.
By using, the mounting area on the mounting substrate 28 can be made smaller.

Although solder is used to connect the metal terminal to the electrode of the block body and the mounting substrate, a conductive adhesive or welding may be used instead.

The present dielectric filter described in Embodiments 1 to 6 is of a type that is surface-mounted on a mounting substrate or the like.

[0043]

According to the first aspect of the present invention, the present invention has an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonates at a predetermined frequency. In the dielectric coaxial resonator, the bottom surface, which faces the mounting substrate and through which the resonator hole penetrates, and the top surface facing the bottom surface,
Positions where the external connection electrodes are directly connected to the electrodes of the mounting substrate, since the external connection electrodes are provided on at least the plurality of side surfaces or the bottom surface, including the plurality of side surfaces existing between the bottom surface and the top surface. Can be kept.

According to a second aspect of the present invention, the dielectric coaxial resonator has an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonates at a predetermined frequency. A bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface, and at least the external connection electrodes including the plurality of side surfaces. Alternatively, there is a mounting substrate having a dielectric coaxial resonator provided on the bottom surface and each electrode connecting the external connection electrode and the outer conductor of the dielectric block to a predetermined portion where the dielectric coaxial resonator is mounted, Since the bottom surface of the dielectric block is located on the mounting substrate, and the external connection electrode and the outer conductor are connected to the electrodes of the mounting substrate, respectively, conventionally,
Since the area (T × W) smaller than the mounting area (L × W) occupied on the mounting board can be mounted, the mounting density on the mounting board can be increased.

According to a third aspect of the present invention, the dielectric coaxial resonator has an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonates at a predetermined frequency. In a dielectric coaxial resonator, the dielectric coaxial resonator including a bottom surface that faces a mounting substrate and through which a resonator hole passes, a top surface that faces the bottom surface, and a plurality of side surfaces that are present between the bottom surface and the top surface. There is a member that forms an electrode that connects the outer conductor to a predetermined portion that joins the block and that has a protrusion that is inserted into the resonator hole of the dielectric block to obtain an external coupling capacitance, and the member has the Since the bottom surface of the dielectric block is located and the protrusion is inserted into the resonator hole to join the dielectric block to the member, an external connection electrode is provided on the outer conductor of the dielectric block body. Need to provide No.

According to a fourth aspect of the present invention, the dielectric coaxial resonator has an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonates at a predetermined frequency. In the above, a predetermined surface for joining the dielectric block, including a bottom surface facing the mounting substrate and penetrating the resonator hole, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface. An electrode for connecting the outer conductor to a portion is formed, and the bottom surface of the dielectric block is provided on a member having a protrusion and an external connection electrode that are inserted into a resonator hole of the dielectric block to obtain external coupling capacitance. A dielectric coaxial resonator that is located and that inserts the protrusion into the resonator hole, and joins the dielectric block to the member; and a predetermined portion of the member where the dielectric coaxial resonator is mounted. External connection electrode And a mounting substrate having electrodes for connecting the electrodes of the outer conductor, the bottom surface of the member for joining the dielectric coaxial resonator is located on the mounting substrate, and the outer connection electrode of the member and the outer conductor are Since the electrodes to be connected and the electrodes of the mounting board are respectively connected, the mounting area of the dielectric block occupying the mounting board becomes small, and the mounting density on the mounting board can be increased. Also, when the dielectric block alone is attached, solder squeezing may occur on the silver electrode, but if a member is used, the plating electrode or the metal plate will be soldered, so solder shaving can be prevented and attachment can be prevented. The strength of fixing to the substrate is increased.

According to a fifth aspect of the present invention, the dielectric coaxial resonator has an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and resonates at a predetermined frequency. A bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface, and at least the external connection electrodes including the plurality of side surfaces. Alternatively, there is a printed wiring board having a dielectric coaxial resonator provided on the bottom surface and each pattern electrode connecting the external connection electrode of the dielectric block and the outer conductor, and the external connection electrode of the dielectric block and the external connection electrode. Since the outer conductor is connected to each of the pattern electrodes of the printed wiring board, a certain pattern electrode capable of connecting dielectric blocks of different sizes should be provided. Standardization of the printed wiring board can be achieved.

According to a sixth aspect of the present invention, a dielectric coaxial resonator having an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block and resonating at a predetermined frequency. A bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface, and at least the external connection electrodes including the plurality of side surfaces. Alternatively, there is a printed wiring board having a dielectric coaxial resonator provided on the bottom surface and each pattern electrode connecting the external connection electrode of the dielectric block and the outer conductor, and the external connection electrode of the dielectric block. And a dielectric coaxial resonator for connecting the outer conductor to each of the pattern electrodes of the printed wiring board, and an electrode for connecting each of the pattern electrodes of the printed wiring board to a mounting portion. There is a mounting board having, the bottom surface of the printed wiring board is located on the mounting board, and since each pattern electrode of the printed wiring board and each electrode of the mounting board are respectively connected, The mounting area of the dielectric block on the mounting substrate can be reduced, and the mounting density on the mounting substrate can be increased. Also, the user of the dielectric filter can standardize the pattern of the mounting substrate on which the printed wiring board is mounted by standardizing the printed wiring board.

According to a seventh aspect of the present invention, there is provided an outer conductor formed on the outer surface of the dielectric block and an inner conductor formed on the inner surface of the hole of the dielectric block, and the dielectric coaxial body resonates at a predetermined frequency. In the resonator, the resonator includes a bottom surface through which the resonator hole penetrates the mounting substrate, a top surface facing the bottom surface, a plurality of side surfaces existing between the bottom surface and the top surface, and at least the plurality of external connection electrodes. Of the dielectric block, the external connection electrode and the outer conductor of the dielectric block are connected to the electrodes provided on the mounting substrate by using metal terminals to fix the dielectric coaxial resonator. Therefore, the mounting area of the dielectric block occupying the mounting board is reduced, and the mounting density can be increased, and
Fixed strength increases.

As described above, according to the present invention, the mounting density on the mounting substrate is increased and the fixing strength is increased, so that there is an effect that the device can be downsized and the yield can be improved to reduce the cost. Particularly in the dielectric coaxial resonator, the effect can be exerted on the one having a large number of stages and the one having a long resonator length.

[Brief description of drawings]

FIG. 1 is a perspective view of a dielectric filter according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a dielectric filter according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a dielectric filter according to a third embodiment of the present invention.

FIG. 4A is a perspective view of a dielectric filter and a member according to a fourth embodiment of the present invention. (B) is a cross-sectional view taken along the line AA at the time of joining the dielectric filter and the member of Example 4 of the present invention.

FIG. 5 is a perspective view of a dielectric filter and a printed wiring board according to a fifth embodiment of the present invention when being joined.

FIG. 6A is a top view of a printed wiring board used in Example 5 of the present invention. (B) is a front view of a printed wiring board used in Example 5 of the present invention. (C) is a bottom view of the printed wiring board used in Example 5 of the present invention. (D)
[Fig. 6] is a side view of a printed wiring board used in Embodiment 5 of the present invention.

FIG. 7A is a perspective view of a dielectric filter according to a sixth embodiment of the present invention when mounted on a mounting substrate. (B) is a BB line sectional view at the time of mounting the mounting substrate of the dielectric filter of Example 6 of the present invention. (C) is a BB line sectional view at the time of mounting a mounting substrate of a dielectric filter of Example 6 of the present invention.

FIG. 8A is a perspective view of a conventional dielectric filter. (B) is a perspective view of a dielectric filter of a conventional example.

FIG. 9 is a perspective view showing a state in which a conventional dielectric filter is cut.

[Explanation of symbols]

 2 Dielectric block 3 Resonator hole 4 Outer conductor 6 Bottom surface 7 Upper surface 12 Member 13 Protrusion 18 Inner conductor 19 Printed wiring board 22 Metal terminal 23 Metal terminal 28 Mounting board

Claims (7)

[Claims] 1. A dielectric coaxial resonator having an outer conductor formed on an outer surface of a dielectric block and an inner conductor formed on an inner surface of a hole of the dielectric block, wherein the mounting substrate is a dielectric coaxial resonator that resonates at a predetermined frequency. A bottom surface through which the resonator hole penetrates and a top surface facing the bottom surface, a plurality of side surfaces existing between the bottom surface and the top surface, and an external connection electrode on at least the plurality of side surfaces or the bottom surface. A dielectric coaxial resonator characterized by being provided. 2. A dielectric coaxial resonator having an outer conductor formed on an outer surface of a dielectric block and an inner conductor formed on an inner surface of a hole of the dielectric block, wherein the dielectric coaxial resonator resonates at a predetermined frequency. A bottom surface through which the resonator hole penetrates and a top surface facing the bottom surface, a plurality of side surfaces existing between the bottom surface and the top surface, and an external connection electrode on at least the plurality of side surfaces or the bottom surface. There is a dielectric coaxial resonator to be provided, and a mounting substrate having respective electrodes for connecting the external connection electrode and the outer conductor of the dielectric block to a predetermined portion where the dielectric coaxial resonator is mounted, and the mounting substrate includes A mounting structure for a dielectric coaxial resonator, wherein the bottom surface of the dielectric block is located to connect the external connection electrode and the outer conductor to the respective electrodes of the mounting substrate, respectively. 3. A dielectric coaxial resonator having an outer conductor formed on an outer surface of a dielectric block and an inner conductor formed on an inner surface of a hole of the dielectric block, wherein the dielectric coaxial resonator resonates at a predetermined frequency. A dielectric coaxial resonator including a bottom surface facing a bottom surface and penetrating a resonator hole, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface; and the dielectric block. There is a member that has an electrode that connects the outer conductor to a predetermined portion, and has a protrusion that is inserted into the resonator hole of the dielectric block in order to obtain external coupling capacitance, and the member has the dielectric block of the dielectric block. A dielectric coaxial resonator, wherein the bottom surface is located, and the protrusion is inserted into the resonator hole to bond the dielectric block to the member. 4. A dielectric coaxial resonator having an outer conductor formed on an outer surface of a dielectric block and an inner conductor formed on an inner surface of a hole of the dielectric block, wherein the mounting substrate is a dielectric coaxial resonator that resonates at a predetermined frequency. A bottom surface through which the resonator hole penetrates, a top surface facing the bottom surface, and a plurality of side surfaces existing between the bottom surface and the top surface. The bottom surface of the dielectric block is located on a member that constitutes an electrode that connects a conductor and that has a protrusion and an external connection electrode that are inserted into a resonator hole of the dielectric block to obtain an external coupling capacitance, A dielectric coaxial resonator in which the protrusion is inserted into a resonator hole to join the dielectric block to the member, and a predetermined portion where the dielectric coaxial resonator is mounted, the external connection electrode of the member and the Outer conductor electrode There is a mounting substrate having electrodes to be connected, the bottom surface of the member that joins the dielectric coaxial resonator is located on the mounting substrate, and the electrode that connects the external connection electrode and the outer conductor of the member to the mounting substrate. 2. A mounting structure of a dielectric coaxial resonator, characterized in that the respective electrodes are connected to each other. 5. A dielectric coaxial resonator having an outer conductor formed on an outer surface of a dielectric block and an inner conductor formed on an inner surface of a hole of the dielectric block, wherein the mounting substrate is a dielectric coaxial resonator that resonates at a predetermined frequency. A bottom surface through which the resonator hole penetrates and a top surface facing the bottom surface, a plurality of side surfaces existing between the bottom surface and the top surface, and an external connection electrode on at least the plurality of side surfaces or the bottom surface. There is a dielectric coaxial resonator to be provided, and there is a printed wiring board having each pattern electrode for connecting the external connection electrode of the dielectric block and the outer conductor, and the external connection electrode of the dielectric block and the outer conductor are A dielectric coaxial resonator, which is connected to each of the pattern electrodes of a printed wiring board. 6. A dielectric coaxial resonator having an outer conductor formed on an outer surface of a dielectric block and an inner conductor formed on an inner surface of a hole of the dielectric block, wherein the mounting substrate is a dielectric coaxial resonator that resonates at a predetermined frequency. A bottom surface through which the resonator hole penetrates and a top surface facing the bottom surface, a plurality of side surfaces existing between the bottom surface and the top surface, and an external connection electrode on at least the plurality of side surfaces or the bottom surface. There is a dielectric coaxial resonator to be provided, and a printed wiring board having each pattern electrode for connecting the external connection electrode of the dielectric block and the outer conductor, and the external connection electrode of the dielectric block and the outer conductor. And a mounting substrate having a dielectric coaxial resonator for connecting each of the pattern electrodes of the printed wiring board to each other and an electrode for connecting each pattern electrode of the printed wiring board to the mounting portion. A bottom surface of the printed wiring board is located on the mounting board, and the pattern electrodes of the printed wiring board and the electrodes of the mounting board are connected to each other, respectively. Construction. 7. A mounting substrate for a dielectric coaxial resonator having an outer conductor formed on an outer surface of a dielectric block and an inner conductor formed on an inner surface of a hole of the dielectric block and resonating at a predetermined frequency. A bottom surface through which the resonator hole penetrates, a top surface facing the bottom surface, a plurality of side surfaces existing between the bottom surface and the top surface, and an external connection electrode on at least the plurality of side surfaces or the bottom surface. A dielectric coaxial resonator, wherein a metal coaxial terminal is used to connect the external connection electrode and the outer conductor of the dielectric block to each electrode provided on the mounting substrate to fix the dielectric coaxial resonator. Resonator mounting structure.