JPH05335821A - Dielectric resonator and its manufacture - Google Patents

Abstract

PURPOSE:To obtain a structure and a manufacture method in which a manufacture time is reduced and a mass-production is facilitated in the dielectric resonator. CONSTITUTION:A conductor sheet 2a for a transmission path is sticked to one side at one end of a dielectric sheet 3a and a conductor sheet 4a for a ground electrode is stuck to a face opposite to the face at the other end of the dielectric sheet 3a. The dielectric sheet 3a is wound around the conductor sheet 2a for the transmission path as a core from its one end to form a cylinder 5A whose outer periphery is covered by the conductor sheet 4a for the ground electrode. After firing the cylinder 5A, the fired cylinder is cut off or after cutting off the cylinder 5A, it is fired to manufacture a raw member 5a and the ground electrode is stuck to one end face of the raw member 5a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric resonator constituting a high frequency voltage controlled oscillator, a filter and the like, and a method of manufacturing the dielectric resonator.

[0002]

2. Description of the Related Art Dielectric resonators are used in mobile radio equipment such as automobile telephones, various radio equipment such as mobile telephones, or voltage-controlled oscillators and filters incorporated therein. Widely used as a component. Conventionally, such a dielectric resonator has been manufactured by individually processing a dielectric ceramic material into a cylindrical shape and applying or electroplating a conductor for a transmission line on the inner and outer surfaces of the material. ..

However, such a dielectric resonator and its manufacturing method have a problem that it takes time to process the dielectric ceramic material, electroplating, etc., and is not suitable for mass production.

In view of the above problems, an object of the present invention is to provide a dielectric resonator which can be manufactured in a short time and can be easily mass-produced, and a manufacturing method thereof.

[0005]

In order to achieve the above object, a dielectric resonator of the present invention comprises a dielectric body which is spirally wound around a conductor to be a transmission line and sintered.
It is characterized in that it is configured by a ground electrode integrally provided around the dielectric and an end surface electrode that is attached to an end surface of the dielectric and connects the ground electrode and the conductor.

In the method of manufacturing a dielectric resonator according to the present invention, a conductor sheet for a transmission path is attached to one surface of one end of the dielectric sheet, and the other end of the dielectric sheet is attached. The conductor sheet for the ground electrode is attached to the surface opposite to the above, and the dielectric sheet is wound from the one end so that the conductor sheet for the transmission path is located in the core and the outer periphery is A cylindrical body covered with a conductor sheet for the ground electrode, or a cylindrical body is formed,
Alternatively, the method is characterized in that the cylindrical body is fired, cut, or fired after cutting, and then a ground electrode is attached to one end surface of the cylindrical body for manufacturing.

[0007]

In the method of manufacturing a dielectric resonator according to the present invention, a cylindrical body or a cylinder formed of a conductor for a transmission path of a core portion, a dielectric outside the core, and a conductor for an outermost ground electrode. The body dielectric resonator material is made in one piece.

[0008]

1 (a) to 1 (c) are manufacturing process diagrams showing an embodiment of a method of manufacturing a dielectric resonator according to the present invention. As shown in FIG. 1A, first, a ceramic sheet is kneaded with a resin serving as a binder to form a sheet-shaped dielectric sheet.
A conductor sheet 2a for a transmission path, which is formed into a sheet by kneading conductor powder with a binder on one surface of one end 3b of the sheet 3a.
Is attached so that the end faces thereof are substantially aligned with each other, and a conductor sheet for a ground electrode is formed on the surface of the dielectric sheet 3a opposite to the other end portion 3c in the same manner as the conductor sheet 2a. 4a
The tip of the conductor sheet 4a is attached so that it protrudes from the dielectric sheet 3a.

Next, as shown in (b), the dielectric sheet is
From the one end 3b to the conductor sheet for the transmission path.
A cylindrical body 5 in which the core 2a is wound as a core portion and the outer periphery is covered with the conductor sheet 4a for the ground electrode as shown in FIG.
Form A.

After that, the cylindrical body 5A, which is the material of the dielectric resonator, is fired and cut into a prescribed length by the two-dot chain line 9 in (c). (3 shows the case of three), and the material 5a of the dielectric resonator is prepared.

A ground electrode is attached to one end surface of the material 5a by sputtering, vapor deposition, baking, electroplating or the like, whereby the perspective view of FIG. 2 (A) and (B), (C).
As shown in the cross-sectional view of FIG. 3, a conductor 2 for a transmission path is provided in the core portion, and a spiral integrated conductor 3 is provided outside the conductor 2.
Then, the dielectric resonator 1 having a structure in which the outer periphery of the dielectric 3 is covered with the ground electrode conductor 4 and one end face is covered with the ground electrode conductor 6 is manufactured.

In this way, the conductor 2 of the core portion, the dielectric 3 on the outside thereof, and the conductor 4 of the outermost periphery are integrally formed into a cylindrical body 5A.
To form a large number of dielectric resonator materials 5a at a time by firing the cylindrical body 5A and cutting it into a prescribed length.
Since it can be manufactured, the processing time can be shortened, and the processing such as electroplating on the outer surface can be performed only on one end surface on one side, so that the processing time can be shortened and mass production becomes easy. In addition, the cylindrical body 5A
May be fired after cutting.

FIGS. 3A to 3C are manufacturing process diagrams of another embodiment of the manufacturing method according to the present invention. Fig.3 (a)-
As shown in (c), in this example, the dielectric sheet 3a is replaced with the conductor rod for the transmission path by using the core rod 7 in contrast to the embodiment shown in FIGS. The core 2a is wound as a core to form a cylindrical body 5B having a hole 8 in the center. After the cylindrical body 5B is formed, it is fired and cut at the position of the chain double-dashed line 9 so as to have a prescribed length in the same manner as in the above-mentioned embodiment to prepare a plurality of raw materials, and the raw material is the same as the above. A ground dielectric electrode is attached to one end surface of one side by sputtering, vapor deposition, baking, electroplating or the like to produce a cylindrical dielectric resonator.

[0014]

According to the present invention, the conductor of the core formed in the shape of a sheet, the dielectric outside thereof, and the conductor of the outermost periphery are cylindrical bodies, or a dielectric body having a structure integrated with the cylindrical body. It is possible to fabricate many dielectric resonator materials at a time by forming it as a resonator material and firing this cylinder or cylinder and cutting it to a specified length or firing after cutting. The processing time can be shortened, and the processing such as the baking of the outer surface can be performed only on one end surface on one side, so that the processing time can be shortened and the mass production becomes easy.

[Brief description of drawings]

FIG. 1 is a manufacturing process chart showing an embodiment of a method for manufacturing a dielectric resonator according to the present invention.

2A is a perspective view showing a dielectric resonator according to the embodiment, FIG. 2B is a sectional view taken along line EE of FIG. 2A, and FIG.
FIG. 8 is a sectional view taken along line FF of FIG.

FIG. 3 is a manufacturing process diagram showing another embodiment of the method of manufacturing a dielectric resonator according to the present invention.

[Explanation of symbols]

 1 Dielectric Resonator 2, 4 Conductor 2a, 4a Conductor Sheet 3 Dielectric 3a Dielectric Sheet 3b, 3c End 5A Cylindrical 5B Cylindrical 5a Material 6 Grounding Electrode 7 Core Rod 8 Hole

Claims (2)

[Claims] 1. A dielectric body, which is integrally spirally wound around a conductor to be a transmission line and is sintered, a conductor integrally provided around the dielectric body and serving as a ground electrode, and the dielectric body. A dielectric resonator comprising: a ground electrode which is attached to an end surface and connects the conductors to each other. 2. A conductor sheet for a transmission path is attached to one surface of one end of a dielectric sheet, and a conductor sheet for a ground electrode is provided on the opposite surface of the other end of the dielectric sheet. -A sheet is attached, the dielectric sheet is wound from the one end, the conductor sheet for the transmission path is located in the core, and the outer periphery is covered with the conductor sheet for the ground electrode. A dielectric resonance characterized by forming a cylindrical body or a cylindrical body, firing the cylindrical body or the cylindrical body, cutting or firing after cutting, and then attaching a ground electrode to one end surface to manufacture the dielectric resonance. Manufacturing method.