JPH1084201A - Dielectric resonator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a degree of freedom for the attachment direction of every signal input/output coaxial connector without increasing the total size of the connector by soldering the external conductor of the connector to a panel and also fixing the connector to a case. SOLUTION: The central conductors and the external conductors of coaxial connectors 61 to 63 are put through the opening parts of an upper panel 20, and these external conductors are soldered to the panel 20. As the panel 20 functions as a ground electrode for the dielectric resonators 1a to 1d, the ground of connectors 61 to 63 are finally connected to the ground of resonators 1a to 1d. An upper case 35 is put over the resonators 1a to 1d which are unified after the panel 20 and a lower panel 10 are soldered together, and the connectors 61 to 63 are fastened to a nut 7 via a washer and then fixed to the case 35. Thus, every dielectric resonator is not required to have its internal space to store the flange part of every coaxial connector and a degree of freedom is secured for the draw-out direction of the connector.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric resonator device in which a plurality of dielectric resonators each having an internal dielectric in a cavity are integrated and housed in a case.

[0002]

2. Description of the Related Art Conventionally, a plurality of dielectric resonators are provided in which a plurality of dielectric resonators each having an internal dielectric provided in a rectangular cylindrical cavity are arranged and adjacent dielectric resonators are coupled. Is used as a filter or the like.

FIG. 7 is an exploded perspective view of a conventional multi-stage dielectric resonator device. Reference numerals 40a to 40f denote dielectric resonators each having a cross-shaped internal dielectric provided in a rectangular cylindrical cavity. Reference numerals 41, 42, and 43 denote electrode panels, respectively, which are provided with a coaxial connector and a coupling loop projecting from the center conductor thereof toward the dielectric resonator. Also, 44 is a support plate, 45 is a ground plate, and 46 is a fixed plate. First,
The dielectric resonators 40a, 40b, and 40c are arranged at predetermined intervals, and the ground plate 45 is soldered to the gap to temporarily connect them. Similarly, the dielectric resonators 40d, 40e, and 40f are arranged at predetermined intervals and connected by soldering an earth plate 45 to a gap portion, and the support plate 44 is sandwiched by these. Then, the electrode panels 41, 42, 43 are connected to the dielectric resonator 40.
a, 40f, 40c, and 40d are respectively disposed in the opening portions, and a ground plate 45 is soldered to a gap portion between the openings, and is inserted into the fixing plate 46. From the back side of the fixing plate 46, the fixing plate 46, the support plate 44 , And as shown in FIG.
Further, the fixing plate 47 is screwed to the support plate 44 to be integrally assembled.

However, in the dielectric resonator device having such a structure, a fixing plate and a large number of ground plates are required, so that it takes a long time to assemble the whole. There is a problem that an extra space is required for arranging the members, resulting in an increase in size.

Accordingly, the applicant of the present application has filed Japanese Patent Application No. 7-203.
No. 461 has filed an application for a dielectric resonator device in which the total number of parts is reduced, the working time is significantly reduced, and cost and size are reduced. FIG. 9 is an exploded perspective view of the dielectric resonator device according to the above application, and FIG. 10 is a view showing a state after assembly. The dielectric resonator device according to this application has a fixing function of fixing the dielectric resonators 50a to 50d and a function of the ground electrode panel as the metal plate 51,
52, the total number of components is reduced, the time required for assembly is reduced, and the adjacent dielectric resonators 50a to 50d are arranged in close contact with each other to reduce the size. is there. In FIG. 9, 50a,
50b, 50c and 50d are dielectric resonators. 51,
Reference numeral 52 denotes a metal plate, which is provided with bent portions indicated by 53 and 54, respectively.
5, 56 are provided. Signal input / output coaxial connectors 59a, 59b, 59c are attached to the upper metal plate 51, and a coupling loop is formed between the center conductor of each of these coaxial connectors and the metal plate 51 on the back side of the metal plate 51. I do. The four dielectric resonators 50a to 50d are arranged so that the distance between adjacent dielectric resonators is almost in close contact with each other, and the upper and lower metal plates 51 and 52 are respectively placed on the opening surfaces.
At the holes 55 and 56 formed in the bent portions of the metal plates 51 and 52, the metal plates 51 and 52 are soldered to the conductive films formed on the outer surfaces of the cavities of the four dielectric resonators. I try to assemble.

[0006]

In the dielectric resonator device, a coaxial connector is generally used as a signal input / output connector. For example, to fix an SMA type coaxial connector, an opening 71 is formed in the mounting plate 70 as shown in FIG. 11A, and the coaxial connector is coaxially mounted from the back side of the mounting plate 70 as shown in FIG. The connector 61 is passed through the opening 71 so that the flange 61c of the coaxial connector 61
Is attached to the back side of the mounting plate 70 and fastened with nuts 7 from the front side of the mounting plate 70. In the figure, 61a
Is a center conductor of the coaxial connector 61, and 61b is an outer conductor. Reference numeral 6 denotes a washer.

With such a mounting structure, a space for accommodating the flange 61c of the coaxial connector 61 is required inside the dielectric resonator. Due to this space, the coaxial connector can be mounted in the conventional dielectric resonator. The plane is limited to a plane parallel to the opening plane of the dielectric resonator. That is, there is a problem that there is no degree of freedom in the direction in which the coaxial connector is pulled out.

On the other hand, if a configuration is adopted in which the coaxial connectors are fixed to the wall surfaces of the cavities of the dielectric resonator devices 1a to 1d, the coaxial connectors 61 and 62 as shown in FIGS. , 63 can be provided with a degree of freedom, but in order to fix these coaxial connectors to the wall surface of the cavity, a flange of the coaxial connector (shown in FIG. 11) is provided above (or below) the internal dielectric. 61
A space larger than the width of c) is required. Since the coaxial connector itself cannot be reduced in size and a standardized connector is generally used, the cavity of the dielectric resonators 1a to 1d has to be enlarged to secure this space.
For this reason, in a dielectric resonator device requiring miniaturization, a configuration in which the coaxial connector is fixed to the wall surface of the cavity cannot be adopted.

An object of the present invention is to provide a dielectric resonator device having a degree of freedom in a mounting direction of a connector without increasing the size of the whole.

[0010]

According to a first aspect of the present invention, there is provided a method for manufacturing a semiconductor device, comprising: forming an inner dielectric in a rectangular cylindrical cavity having at least one open surface; and forming a conductive film on an outer surface of the cavity. The dielectric resonator is disposed so that the opening surface forms substantially the same surface, and a metal plate panel having a linear expansion coefficient close to the linear expansion coefficient of the cavity is continuously covered on the opening surface. Is joined to a conductive film formed near the opening to integrate a plurality of cavities, and housed in a case, wherein the outer conductor of a signal input / output coaxial connector is provided. While soldering to the panel, the coaxial connector is fixed to the case.

As described above, by soldering the outer conductor of the coaxial connector for signal input / output to the panel, the ground of the coaxial connector is connected to the ground of the dielectric resonator, and the case for housing the dielectric resonator is provided. Since the coaxial connector is fixed, a space for accommodating the flange portion of the signal input / output coaxial connector inside the dielectric resonator becomes unnecessary. For this reason, the coaxial connector for signal input / output can be pulled out also in the direction perpendicular to the wall surface of the cavity without increasing the size of the dielectric resonator, so that the coaxial connector has a degree of freedom in the drawing direction. be able to. In addition, since the space for accommodating the flange portion of the coaxial connector is not required inside the cavity, the cavity can be reduced in size, and the entire dielectric resonator can be reduced in size.

Further, according to the invention described in claim 2, a hole is formed around a portion of the panel to which the outer conductor of the connector is soldered to form a beam shape, so that environmental temperature change and dielectric resonance Even if the case and the panel are displaced differently due to heat generation of the container, the beam portion is bent, and almost no stress is applied to a portion where the outer conductor of the coaxial connector is soldered. That is, even if the case is not formed of an expensive metal material having a linear expansion coefficient similar to that of the panel, cracks may occur in the soldered portion of the outer conductor of the connector due to environmental temperature change or the like, resulting in poor conduction. Does not occur. Therefore, the dielectric resonator device can be manufactured at low cost.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a dielectric resonator device according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is an exploded perspective view of a dielectric resonator device according to an embodiment of the present invention. Reference numerals 1a to 1d denote dielectric resonators each having a cross-shaped internal dielectric 2a to 2d provided inside a rectangular cylindrical cavity. The electrode surface is formed by silver metallization on the outer wall surface of the cavity. Reference numeral 10 denotes a lower panel that covers the lower opening surfaces of the dielectric resonators 1a to 1d, and reference numeral 20 denotes an upper panel that covers the upper opening surfaces of the dielectric resonators 1a to 1d. The lower panel 10 and the upper panel 20 are made of 42 alloy (42% Ni—Fe alloy), Invar, having substantially the same linear expansion coefficient as the dielectric resonators 1a to 1d.
It is made of a metal plate such as permalloy to prevent problems such as cracks in the resonator due to thermal stress and breakage of the soldered surface. A coupling member 12 for coupling the dielectric resonator 1a and the dielectric resonator 1b is provided on the bottom surface of the lower panel 10.
And a coupling member 13 for coupling the dielectric resonator 1c and the dielectric resonator 1d. Also, the lower panel 10
An opening 11 is provided on the bottom surface for performing frequency adjustment and coupling adjustment by partially cutting the internal dielectrics 2a to 2d of the dielectric resonators 1a to 1d with a rotary grindstone (diamond luter). . Further, the lower panel 10 is provided with a plurality of holes 14 for acting as a solder pool when soldering over the dielectric resonators 1a to 1d to improve solderability. The upper panel 20 is provided with an opening through which the outer conductor and the center conductor of the coaxial connectors 61, 62, 63 pass. FIG. 2 is an enlarged view of a portion of the coaxial connector 61 through which the outer conductor and the center conductor pass. Although the inner diameter of the opening 21 is slightly smaller than the outer diameter of the outer conductor 61b of the coaxial connector 61, cutouts are provided in four directions so that the outer conductor of the coaxial connector can be press-fitted (see FIG. 4). A hole 22 is provided around the opening 21, and in this example, two beams 23 are formed. This hole 22 can be easily provided by press punching or etching. As shown in FIG. 1, the upper panel 20 has holes 2 for acting as solder pools when soldering over the dielectric resonators 1a to 1d and improving solderability.
4 are provided. In addition, cutouts are provided on the wall surfaces of the cavities to avoid interference with the coupling members 12 and 13 and the outer conductors of the coaxial connectors 61, 62 and 63. As will be described later, the opening 2 of the upper panel 20 shown in FIG.
1 through the center conductor 61a and the outer conductor 61b of the coaxial connector 61, and solder the outer conductor 61b to the upper panel 20 (see FIG. 4). Further, since the upper panel 20 functions as a ground electrode panel for the dielectric resonators 1a to 1d, the ground of the coaxial connector 61 and the ground of the dielectric resonators 1a to 1d are finally connected. An external coupling member 8 for magnetically coupling the internal dielectrics 2b and 2c is connected to the center conductor 61a. The mounting structure of the coaxial connectors 62 and 63 to the upper panel 20 is the same as that of the coaxial connector 61 described above.

In FIG. 1, 30 is a lower case, and 35 is an upper case. On the bottom surface of the lower case 30 and on the upper surface and side surfaces of the upper case 35, a plurality of projecting portions 31 each having a shape projecting inward as shown in FIG. 3 are provided. Further, a plurality of concave portions 32 are formed on the outer side surface of the lower case 30, and a plurality of convex portions 36 are formed on a lower end portion on the inner side surface of the upper case 35. When the upper case 35 is put on the lower case 30, the concave portions 32 and the convex portions 36 are fitted. further,
The lower case 30 is provided with a mounting portion 33 for fixing to the case rack of the equipment storage unit, and the upper case 35 is provided with cutout portions 37, 38, for fixing coaxial connectors 61, 62, 63. 39 are provided.

Next, the procedure for assembling the dielectric resonator device of this embodiment will be described. The dielectric resonators 1 a to 1 d are arranged on the lower panel 10 on which the coupling members 12 and 13 are arranged, and the lower panel 10 and the dielectric resonator are soldered with holes 14. At this time, the hole 14 acts as a solder pool as described above. Also, the center conductor 61a and the outer conductor 61b of the coaxial connector 61 are inserted into the opening 21 of the upper panel 20 from the outside, and the outer conductor 61b of the coaxial connector 61 is soldered to the inside of the upper panel 20 (FIGS. 2 and 4).
reference). Also, the inner conductors 2b and 2c are provided on the center conductor 61a.
And an external coupling member 8 for magnetic field coupling. The same applies to the coaxial connectors 62 and 63. The upper panel 20 in this state is put on the upper opening surfaces of the dielectric resonators 1a to 1d soldered to the lower panel 10, and the upper panel 20 and the dielectric resonators 1a to 1d are soldered with the holes 24. . As in the case of the lower panel 10, the hole 24 functions as a solder pool.

In the above description, after the lower panel 10 and the dielectric resonators 1a to 1d are soldered, the upper panel 2
0 and the dielectric resonators 1a to 1d are soldered. However, after the upper panel 20 and the dielectric resonators 1a to 1d are soldered, the lower panel 10 and the dielectric resonators 1a to 1d are soldered.
May be soldered.

Next, the lower panel 10 and the upper panel 2
The upper case 35 is put on the dielectric resonators 1a to 1d integrated by soldering 0. At this time, the coaxial connectors 61, 62, 63 are located in the cutouts 37, 38, 39 provided in the upper case 35, and the upper case 35 does not interfere with the coaxial connectors 61, 62, 63. At this time, the flange portion of each coaxial connector is
In the case of the coaxial connector 61, which is located between the upper case 35 and the upper case 35, the coaxial connector 61 is fixed to the upper case 35 by fastening with a nut 7 via a washer 6 as shown in FIG.
Then, while connecting a cable to each coaxial connector and performing characteristic measurement using a measuring instrument or the like, the above-described rotating grindstone is inserted from the opening 11 of the lower panel 10 to thereby obtain each dielectric resonator 1a.
１1d frequency adjustment and coupling adjustment. Since each coaxial connector is already fixed to the upper case 35,
Even if the cable is attached to and detached from each coaxial connector, there is no problem that cracks are generated at the soldered portions of the outer conductors, thereby causing poor conduction. When the frequency adjustment and the coupling adjustment are completed, the upper case 35 is put on the lower case 30, and the concave portions 32 and the convex portions 36 are fitted to complete the assembly.

FIG. 5 is a completed view of the dielectric resonator device. As described above, the dielectric resonator device of this embodiment is formed by integrating the dielectric resonators 1a to 1d, the lower panel 10, and the upper panel 20 by soldering into the lower case 30.
And the upper case 35. The coaxial connectors 61, 62, and 63 are provided with the cutouts 37,
38, 39, and the outer conductor of each coaxial connector is soldered to the back side of the upper panel to be connected to the resonator ground. In the case, the dielectric resonator is connected to the lower case 30.
And the plurality of protrusions 31 of the upper case 35, thereby stably holding and fixing the dielectric resonator in the case.

In the dielectric resonator device assembled as described above, the portion where the outer conductor of the coaxial connector is soldered is supported by the beam. It is not necessary to form the upper case 35 with an inexpensive material such as SUS, for example. That is, even if the upper case 35 and the upper panel 20 are displaced differently due to environmental temperature change, heat generation of the dielectric resonator, etc., the beam 23 shown in FIG. 2 is bent and the outer conductor 61b of the coaxial connector 61 is soldered. The stress applied to the spot 9 is alleviated. For this reason, even if the upper case 35 is not formed of the above-mentioned expensive material, there is no problem that a crack is generated at a place where the outer conductor of the coaxial connector is soldered to cause a conduction failure, and the entire case is made of an inexpensive material. Since it can be formed, the cost of the dielectric resonator device does not increase.

In the above-described embodiment, the beam having the shape shown in FIG. 2 is formed on the upper panel 20. Alternatively, the beam 23 having the shape shown in FIGS. 6A and 6B may be formed. Good. FIG. 6B is a cross-sectional view taken along the line AA shown in FIG. The beam 23 has a shape bent in a direction perpendicular to the panel surface as shown in the figure. Also in this case, similarly to the above-described embodiment, even if the upper panel 20 and the upper case 35 cause different displacements due to the difference in linear expansion coefficient, the beam 23 bends, and the outer conductor of the coaxial connector is soldered. Since the stress applied to the substrate is reduced and cracks are prevented from occurring, conduction failure does not occur due to a change in environmental temperature or heat generation of the dielectric resonator.

The drawing direction and the number of the coaxial connectors are not limited to the above embodiment, but can be arbitrarily selected. The opening 2 of the upper panel 20
1, the formation positions of the holes 22 and the like, and the orientations of the notches 37, 38, and 39 of the upper case 35 may be formed in accordance with the drawing direction of each coaxial connector.

[0023]

As described above, according to the first aspect of the present invention, by connecting the outer conductor of the signal input / output connector to the panel, the ground of the coaxial connector and the ground of the dielectric resonator can be reduced. Are connected, and the coaxial connector is fixed to the case for housing the dielectric resonator, so that a space for housing the flange portion of the coaxial connector inside the dielectric resonator can be eliminated. For this reason, the direction in which the coaxial connector is pulled out can be set to a direction perpendicular to the wall surface of the cavity, and the degree of freedom in the direction in which the connector is drawn out can be increased. Furthermore, the need for a space for accommodating the flange portion of the coaxial connector inside the dielectric resonator is eliminated, so that the size of the dielectric resonator can be reduced, and the overall size of the dielectric resonator device increases. Does not occur.

According to the invention described in claim 2,
Even if the case and the panel are displaced differently due to environmental temperature change, heat generation of the dielectric resonator, and the like, the beam bends and the stress applied to the soldering portion of the outer conductor of the connector is reduced. For this reason, even if the case is formed of an inexpensive material having a large coefficient of linear expansion, cracks do not occur at portions soldered to the panel of the coaxial connector, and the problem of poor conduction does not occur. Therefore, the dielectric resonator device can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a dielectric resonator device according to an embodiment of the present invention.

FIG. 2 is an enlarged view of an opening provided in an upper panel.

FIG. 3 is an enlarged view of protrusions provided on an upper case and a lower case.

FIG. 4 is a diagram illustrating a fixed state of the coaxial connector.

FIG. 5 is a completed view of the dielectric resonator device of this embodiment.

FIG. 6 is an enlarged view of an opening in another embodiment provided in the upper panel.

FIG. 7 is an exploded perspective view of a conventional dielectric resonator device.

FIG. 8 is a completed view of a conventional dielectric resonator device.

FIG. 9 is an exploded perspective view of a conventional dielectric resonator device.

FIG. 10 is a completed view of a conventional dielectric resonator device.

FIG. 11 is a diagram illustrating a conventional method of fixing a coaxial connector.

FIG. 12 is a view showing a dielectric resonator device in which a connector is attached to a wall surface of a cavity.

[Explanation of symbols]

 1a, 1b, 1c, 1d-Dielectric resonator 2a, 2b, 2c, 2d-Internal dielectric 6-Washer 7-Nut 8-External coupling member 9-Soldering point 10-Lower panel 12, 13-Coupling member Reference Signs List 20-upper panel 21-opening 22-hole 23-beam 30-lower case 35-upper case 37,38,39-notch 61,62,63-coaxial connector 61a-center conductor 61b-outer conductor 61c- Flange

Claims (2)

[Claims] 1. A plurality of dielectric resonators each having an inner dielectric provided in a rectangular cylindrical cavity having at least one open surface, and a conductive film formed on an outer surface of the cavity, wherein the plurality of dielectric resonators have substantially the same opening surface. A metal plate having a linear expansion coefficient close to the linear expansion coefficient of the cavity is continuously covered over the opening surface, and the panel is placed on a conductive film formed near the opening. A dielectric resonator device in which a plurality of cavities are integrated by joining and housed in a case, wherein an outer conductor of a coaxial connector for signal input / output is soldered to the panel, and the connector is connected to the case. A dielectric resonator device characterized by being fixed to a substrate. 2. The dielectric resonator device according to claim 1, wherein a hole is provided around a portion of the panel to which the outer conductor of the coaxial connector is soldered to form a beam shape.