JP3554945B2 - Dielectric resonator device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dielectric resonator having an internal dielectric in a cavity and a dielectric resonator device formed by using a plurality of such dielectric resonators.
[0002]
[Prior art]
Conventionally, a TM ₁₁₀ mode dielectric resonator in which an internal dielectric is provided in a rectangular cylindrical cavity, or a TM in which an internal dielectric having a shape in which a plurality of dielectric columns are crossed are formed in a cavity. A multi-mode dielectric resonator is used as a filter or the like. Further, when configuring a dielectric resonator device including a plurality of resonators, a plurality of the above-described dielectric resonators are arranged, and adjacent dielectric resonators are coupled.
[0003]
Here, FIGS. 11 and 12 show configuration examples of a dielectric resonator device formed by integrating a plurality of dielectric resonators. FIG. 11 is an exploded perspective view, and reference numerals 1a to 1f denote dielectric resonators each having a cross-shaped internal dielectric provided in a rectangular cylindrical cavity. Reference numerals 21, 22, and 23 denote electrode panels each having a coaxial connector and a coupling loop projecting from the center conductor thereof toward the dielectric resonator. 24 is a support plate, 26 is a fixed plate, and 25 is a ground plate. These components are assembled as shown in FIG. That is, first, the dielectric resonators 1a, 1b, 1c are arranged at predetermined intervals, and the ground plates 25 are soldered to the gaps to temporarily connect them, and the dielectric resonators 1d, 1e, 1f are also connected. Similarly, the ground plates 25 are arranged at predetermined intervals and connected by soldering to the gaps, and the support plates 24 are sandwiched therebetween. After that, the electrode panels 21, 22, 23 are arranged in the openings of the dielectric resonators 1a, 1f, 1c, 1d, respectively, and the ground plate 25 is soldered to the gaps. Thereafter, these are inserted into the fixing plate 26, the fixing plate 26 and the support plate 24 are screwed from the back side of the fixing plate 26, and the fixing plate 27 is further screwed to the support plate 24 as shown in FIG. These are integrated.
[0004]
FIGS. 11 and 12 show a dielectric resonator device in which a plurality of dielectric resonators are integrally formed. However, even in the case of a single dielectric resonator, two openings in a cavity of one dielectric resonator are used. And an earth panel is soldered to the gap.
[0005]
[Problems to be solved by the invention]
However, the conventional dielectric resonator device having such a structure has a problem that a fixed plate and a large number of ground plates are required, and it takes a long time to assemble the whole. In addition, an extra space is required for disposing a fixing member for fixing the dielectric resonator.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a dielectric resonator and a dielectric resonator device in which the total number of parts is reduced, the working time is significantly reduced, and the cost and size are reduced.
[0007]
[Means for Solving the Problems]
The present invention solves the above-mentioned problem by integrating a conventional electrode panel, a fixed plate, and an earth plate, and obtains a dielectric resonator device by integrating a plurality of dielectric resonators. As described in the above, a dielectric is formed by integrating a plurality of dielectric resonators in which an internal dielectric is integrated in a rectangular cylindrical cavity having at least one open surface, and a conductive film is formed on the outer surface of the cavity. In the body resonator device,
The plurality of cavities are arranged such that the opening surfaces of the cavities form substantially the same plane, and a metal plate having a linear expansion coefficient close to the linear expansion coefficient of the cavities is continuously covered on the opening surfaces of the cavities, A plurality of cavities are integrated with the metal plate, and the metal plate is used as a ground electrode panel, which is formed by soldering to a conductive film formed near an opening surface of each cavity. With this configuration, the metal plate functions as a fixed plate and a ground plate for fixing the plurality of dielectric resonators, and does not require separate ground plates and fixed plates as in the related art. The total number of parts is reduced, and the work steps required for assembling are simplified.
[0008]
Further, the dielectric resonator device improves the strength of the metal plate of the present invention in order to provide a fixing function of the dielectric resonators, as described in claim 2, wherein the predetermined side of the metal plate Bending in the side direction adjacent to the opening surface of the cavity. As a result, the mechanical strength of the metal plate is improved, and the metal plate performs a function of fixing the dielectric resonator by directly mounting the metal plate on, for example, a device on which the metal plate is mounted.
[0009]
The dielectric resonator device according to the present invention, for improving the solderability of the metal plate, as claimed in claim 3, provided with a hole in the soldering portions of the metal plate. Accordingly, by performing soldering at the hole, the hole becomes a solder pool, so that the solderability between the metal plate and the cavity of the dielectric resonator is improved, and the strength of the soldered portion is also improved.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
1 and 2 show the configuration of a dielectric resonator according to a first embodiment of the present invention. 1 is an exploded perspective view, and FIG. 2 is a completed view. In both figures, reference numeral 1 denotes a dielectric resonator in which a cross-shaped internal dielectric 3 is integrally formed in a rectangular cylindrical cavity, and a conductive film is formed on the outer peripheral surface of the cavity 2. The internal dielectric 3 is provided with a hole 5 for frequency adjustment and a groove 4 for setting the degree of coupling between the two resonators. Reference numerals 11 and 12 denote metal plates covering the opening surfaces of the cavities 2, respectively. The metal plates are made of a metal plate such as 42 alloy (42% Ni-Fe alloy), invar, or permalloy having a linear expansion coefficient substantially equal to that of the dielectric resonator ceramic. Thus, a plating film such as a solder plating film or a silver plating film that enhances solderability and conductivity is formed. The metal plates 11 and 12 are placed on the opening surface of the cavity of the dielectric resonator, and soldering is performed at a contact portion indicated by S. In this example, a coaxial connector for inputting / outputting signals, a coupling loop for coupling with an internal dielectric, and the like are omitted in the figure. These may be provided on the metal plates 11 and 12 or provided in the cavity.
[0012]
Next, a configuration of a dielectric resonator according to a second embodiment of the present invention is shown in FIGS. FIG. 3 is an exploded perspective view, and FIG. 4 is a completed view. The difference from the examples shown in FIGS. 1 and 2 is the shape of the metal plates 11 and 12. That is, the two opposite sides of the metal plates 11 and 12 are bent in the side direction adjacent to the opening surface of the cavity to form bent portions 13 and 14. As shown in FIG. 4, the metal plates 11 and 12 are put on the opening surface of the cavity of the dielectric resonator, and soldering is performed at a contact portion indicated by S. In addition, a coaxial connector for signal input / output, a coupling loop for coupling with an internal dielectric, and the like are omitted in the figure.
[0013]
Next, the configuration of a dielectric resonator according to a third embodiment of the present invention is shown in FIGS. FIG. 5 is an exploded perspective view, and FIG. 6 is a completed view. The difference from the examples shown in FIGS. 3 and 4 is the shape of the metal plates 11 and 12. That is, two opposing sides of the metal plates 11 and 12 are bent in the side direction adjacent to the opening surface of the cavity to form bent portions 13 and 14, and holes 15 and 16 are provided in the bent portions. As shown in FIG. 6, the metal plates 11 and 12 are placed over the opening surface of the cavity of the dielectric resonator, and soldering is performed at a location indicated by S such as a hole. At this time, the hole portion serves as a solder pool to improve the solderability, and the metal plates 11 and 12 are securely soldered to the conductor film in the cavity 2. In addition, a coaxial connector for signal input / output, a coupling loop for coupling with an internal dielectric, and the like are omitted in the figure.
[0014]
Next, a configuration of a dielectric resonator device used as an antenna duplexer according to a fourth embodiment is shown in FIGS. FIG. 7 is an exploded perspective view, and FIG. 8 is a view showing a state after the assembly. In FIG. 7, reference numerals 1a, 1b, 1c, and 1d denote dielectric resonators similar to those shown in the first to third embodiments, respectively, to which a characteristic adjustment member holder 6 described later is attached. Reference numerals 11 and 12 denote metal plates, respectively, provided with bent portions indicated by 13 and 14, respectively, and provided holes in the respective bent portions. The upper metal plate 11 is provided with a hole for inserting a characteristic adjusting member, and the coaxial connectors 17a, 17b, 17c are attached. On the back side of these coaxial connectors, a coupling loop is formed between each central conductor and the metal plate. The four dielectric resonators 1a to 1d are arranged in the direction shown in FIG. 7, and the upper and lower metal plates 11, 12 are placed in close contact with the gap between adjacent dielectric resonators so that the openings of the cavities of the dielectric resonators are opened. The state shown in FIG. 8 is obtained by covering the respective surfaces. Thereafter, the metal plates 11 and 12 are soldered to the conductive films formed on the outer surfaces of the cavities of the four dielectric resonators at the holes 15 and 16 formed in the bent portions of the metal plate.
[0015]
FIG. 9 is a partial perspective view showing the relationship between the internal dielectric of the dielectric resonator and the characteristic adjustment member holder. As shown in the drawing, the characteristic adjustment member holder 6 is provided with three screw holes indicated by 7 and 8, and by screwing a frequency adjustment member (not shown) into the screw holes 7 and 7, The amount of insertion of the frequency adjusting member into the holes 5, 5 provided in the internal dielectric 3 is variable. Further, by screwing a coupling adjusting member (not shown) into the screw hole 8, the amount of insertion of the coupling adjusting member into the groove portion 4 provided in the internal dielectric 3 is made variable.
[0016]
FIGS. 10A and 10B are diagrams showing a configuration inside the dielectric resonator device, wherein FIG. 10A is a top view in a state where four dielectric resonators are arranged, and FIG. 10B is a state in which upper and lower metal plates are attached. It is a longitudinal cross-sectional view. Coupling loops 18a and 18d are provided between the center conductors of the coaxial connectors 17a and 17c and the inner surface of the metal plate 11, and the coupling loops 18a and 18d are magnetically coupled to dielectric columns 9a and 9d, respectively. Also, two coupling loops 18b and 18c are provided between the center conductor of the coaxial connector 17b and the back surface of the metal plate 11, and the coupling loops 18b and 18c are respectively provided with dielectric columns 9b and 9c and magnetic fields. Join. A coupling loop 19a and a coupling loop 19b continuous with the coupling loop 19a are provided on the bottom surface of the cavity in the figures of the dielectric resonators 1a and 1b, and the bottom part of the cavity in the figure of the dielectric resonators 1c and 1d. Is provided with a coupling loop 19c and a coupling loop 19d continuous therewith. Therefore, the dielectric pillars indicated by 10a and 10b are coupled via coupling loops 19a and 19b, and the dielectric pillars represented by 10c and 10d are coupled via coupling loops 19c and 19d. With such a configuration, four stages of resonators are respectively formed between the coaxial connectors 17a and 17b and between the coaxial connectors 17c and 17b, and one of them acts as an antenna duplexer using one as a transmission filter and the other as a reception filter. .
[0017]
【The invention's effect】
According to the dielectric resonator device according to claim 1 of the present invention, by together covering a metal plate on the opening surface of the cavity, soldered to the conductive film formed in the vicinity of the opening surface, the metal The plate acts as a ground electrode panel, eliminating the need for a conventional ground plate, greatly reducing the time required for assembly, and reducing cost and size. Moreover, since the metal plate has a linear expansion coefficient close to the linear expansion coefficient of the cavity, the stress applied to the joint between the metal plate and the cavity due to a change in ambient temperature is small, and the dielectric resonator due to the temperature change is not affected. Breakage is prevented, solder deterioration is reduced, and long-term reliability is improved. Further, the metal plate acts as a fixing plate and a grounding plate for fixing the plurality of dielectric resonators, eliminating the need for a separate grounding plate and a fixing plate as in the conventional case, reducing the total number of components, The work steps required for the assembly are also simplified.
[0018]
According to the dielectric resonator device according to the second aspect of the present invention, the mechanical strength of the metal plate is improved. The function of fixing the resonator is achieved, and a special fixing member is not required, so that the overall size and weight can be reduced.
[0019]
According to the dielectric resonator device according to claim 3 of the present invention, by performing the soldering hole portions provided in the metal plate, it becomes the hole portion solder reservoir, the cavity of the metal plate and the dielectric resonator The solderability is improved, and the strength of the soldered portion is also improved.
[Brief description of the drawings]
FIG. 1 is a partially exploded perspective view showing a configuration of a dielectric resonator according to a first embodiment.
FIG. 2 is an external perspective view of the dielectric resonator according to the first embodiment.
FIG. 3 is a partially exploded perspective view showing a configuration of a dielectric resonator according to a second embodiment.
FIG. 4 is an external perspective view of a dielectric resonator according to a second embodiment.
FIG. 5 is a partially exploded perspective view showing a configuration of a dielectric resonator according to a third embodiment.
FIG. 6 is an external perspective view of a dielectric resonator according to a third embodiment.
FIG. 7 is an exploded perspective view of a dielectric resonator device according to a fourth embodiment.
FIG. 8 is an external perspective view of a dielectric resonator device according to a fourth embodiment.
FIG. 9 is a diagram illustrating a relationship between a characteristic adjustment member holder and an internal dielectric.
FIG. 10 is a diagram showing an internal configuration of a dielectric resonator device according to a fourth embodiment.
FIG. 11 is an exploded perspective view showing a configuration of a conventional dielectric resonator device.
FIG. 12 is an external perspective view showing a configuration of a conventional dielectric resonator device.
[Explanation of symbols]
1a to 1f-dielectric resonator 2-cavity 3-internal dielectric 4-groove 5-hole 6-characteristic adjustment member holder 11, 12-metal plate 13, 14-bent portion 15, 16-hole 17a, 17b, 17c-coaxial connectors 18a-18d, 19a-19d-coupling loops 21, 22, 23-electrode panel 24-post plate 25-ground plates 26, 27-fixing plate

Claims (3)

A dielectric resonator device in which an internal dielectric is integrated into a rectangular cylindrical cavity having at least one open surface, and a plurality of dielectric resonators each having a conductive film formed on an outer surface of the cavity are arranged. ,
The plurality of cavities are arranged such that the opening surfaces of the cavities form substantially the same plane, and a metal plate having a linear expansion coefficient close to the linear expansion coefficient of the cavities is continuously covered on the opening surfaces of the cavities, A plurality of cavities are integrated with the metal plate, and the metal plate is used as a ground electrode panel, which is formed by soldering to a conductive film formed near the opening surface of each cavity. Dielectric resonator device. Dielectric resonator device according to a predetermined side of the metal plate to claim 1 by bending the lateral adjacent the open face of the cavity. 3. The dielectric resonator device according to claim 1, wherein a hole is provided in a soldering portion of the metal plate.

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