JPH06232613A - High frequency resonator - Google Patents

Abstract

PURPOSE:To easily connect an internal electrode and a pattern of a connection circuit, to make a printed circuit board small and to obtain a small sized resonator with high Q by forming continuously a pull-out electrode connecting to an end of an internal electrode over at least two sides of the surface of a dielectric block. CONSTITUTION:An external electrode 14 is formed on surfaces 12a, 12c-12f of a dielectric block 12 and an internal electrode 13 of a flat plate shape is buried in the inside in close contact with the dielectric block 12, then a radiation loss is less and the reduction in the effective specific dielectric constant is prevented. Furthermore, since a lead electrode 21 connecting to an end of the internal electrode 13 is continuously formed over surfaces 12b-12f of the dielectric block other than the outer electrode 14, the lead electrode 21 is easily formed as soon as the outer electrode 14 is formed. Moreover, since an outer electrode structure 22 is provided, which is symmetrical with respect to a plane in parallel with side faces 12c, 12d and upper and lower faces 12e, 12f of the dielectric block 12 and bisecting the dielectric block 12, the diverse performance of a mount pattern onto the printed circuit board is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a car phone, a mobile phone,
Filters and oscillators for wireless communication devices such as cordless phones,
The present invention relates to a high frequency resonator used in a microwave frequency range.

[0002]

2. Description of the Related Art In recent years, with the development of automobile phones, mobile phones, cordless phones and the like, research and development of filters and oscillators for wireless communication devices have been actively conducted. These filters and oscillators for wireless communication devices are generally configured so that a microwave having a predetermined resonance frequency is confined in a dielectric block formed of a high dielectric constant material and a predetermined operation effect is obtained.

FIG. 7 is a diagram schematically showing a conventional coaxial type dielectric resonator, wherein (a) is a perspective view and (b) is a sectional view taken along line XX in (a). The coaxial dielectric resonator 51 is composed of a dielectric block 52, an internal electrode 53, and an external electrode 54, and resonates a microwave having an internal electrode length of about 1/4 wavelength. An inner electrode 53 is formed on the inner peripheral surface of the block 52, and an outer electrode 54 is formed on the outer peripheral surface thereof.

FIG. 8 is a sectional view schematically showing a state in which a conventional coaxial dielectric resonator is mounted on a circuit board, and reference numeral 41 in the drawing shows the board. A connection circuit pattern 42a and a ground electrode 42b are formed on the substrate 41, and a coupling capacitor 44 is connected to an intermediate portion of the connection circuit pattern 42a using a solder 43a. Further, a coupling pin 45 is connected and fixed by using a solder 43c in the vicinity of the end of the connection circuit pattern 42a, and the coupling pin 45 is formed in a hook shape in a side view by using an elastic conductive thin plate. When the coaxial dielectric resonator 51 is mounted on the circuit board 40a thus configured, first, the external electrode 5
4 is connected and fixed to a predetermined position on the ground electrode 42b using solder 43b or the like. Next, with the free end side of the coupling pin 45 inserted in the internal electrode 53, it is connected to the internal electrode 53 using the solder 43d. Then, the high frequency signal is transmitted to the connection circuit pattern 42a, the capacitor 44, and the coupling pin 4.
5 is input to the coaxial type dielectric resonator 51 via 5, or is output via the coupling pin 45, the capacitor 44, and the connection circuit pattern 42a.

FIG. 9 is a sectional view schematically showing another state in which a conventional coaxial dielectric resonator is mounted on a circuit board, and 41 in the figure shows the board. Similar to that shown in FIG. 8, a connection circuit pattern 42a and a ground electrode 42b are formed on the substrate 41, and a coupling capacitor 44 is connected thereto. A connecting pin 46 is connected and fixed by using a solder 43c near the end of the connection pattern 42a, and the connecting pin 46 is formed of a conductive thin plate having elasticity. When the high-frequency resonator 51 is mounted on the circuit board 40b configured as described above, the free end side of the coupling pin 46 is wound into the internal electrode 53 as in the case shown in FIG. The coaxial dielectric resonator 51 is connected and fixed to the ground electrode 42b in this state, and the coupling pin 46 is connected to the internal electrode 53 by utilizing the springback action of the coupling pin 46. Then, a high frequency signal is input to the coaxial dielectric resonator 51 via the connection circuit pattern 42a, the capacitor 44, and the coupling pin 46, or the coupling pin 4 is used.
6, the capacitor 44, and the connection circuit pattern 42a.

The above coaxial dielectric resonator 51 has a simple structure and can be designed to have a relatively high effective relative permittivity. However, in the coaxial dielectric resonator 51, in addition to the mounting problem described later, the frequency of the microwave confined in the dielectric block 52 depends on the dielectric block 52.
However, when the resonance frequency is relatively low, the dielectric block 52 becomes large in size, and it is difficult to adjust the resonance frequency.

In order to solve this problem, the present inventors previously proposed a high frequency resonator (Japanese Patent Application No. 3-37280). FIG. 10 is a diagram schematically showing this high-frequency resonator, in which (a) is a plan view and (b) is XX in (a).
The line sectional view is shown. The dielectric block 12 is made of high-frequency dielectric ceramics formed in a substantially rectangular parallelepiped shape by using a high dielectric constant material, and the dielectric block 12 has a flat plate-shaped internal electrode 13a, 1 with a dielectric portion 15 interposed therebetween.
3b and 13c are embedded, and these internal electrodes 13
a, 13b, and 13c are connection electrodes 6 whose open ends are formed on the outer surface of the dielectric block 12 separately from the outer electrodes 62.
Connected by 3. External electrodes 62 are formed on the surfaces of the dielectric block 12 except for a part thereof, and the dielectric block 12, the internal electrodes 13a, ..., The external electrodes 62, and the connection electrodes 63 form a high frequency resonator 61. ing.

In FIG. 11, the high frequency resonator 61 is a circuit board 4.
It is sectional drawing which showed the state mounted on 0c typically, 41 has shown the board | substrate in the figure. Similar to that shown in FIG. 8, a connection circuit pattern 42a and a ground electrode 42b are formed on the substrate 41, and a coupling capacitor 44 is connected thereto. A connecting pin 47 is connected and fixed to the end portion of the connection circuit pattern 42a by using a solder 43c, and the connecting pin 47 is a conductive thin plate having elasticity and is substantially W in side view.
It is formed in a letter shape. When the high frequency resonator 61 is mounted on the circuit board 40c configured as described above, FIG.
Similarly to the case shown in FIG. 6, the surface of the connecting electrode 63 is brought into contact with the vertical surface on the free end side of the coupling pin 47, and the external electrode 6 is connected in a state of being connected by utilizing the springback action of the coupling pin 47.
2 is fixed to the ground electrode 42b by soldering.

The high frequency resonator 61 thus constructed
, The flat internal electrodes 13a, ... Are embedded in the dielectric block 12 without any space, so that the radiation loss is reduced and the effective relative permittivity is prevented from lowering. Moreover, the internal electrodes 13a, ...
And since it is electrically connected by the connection electrode 63,
Due to the structure, the resistance of the resonance circuit is substantially lowered, and the Q value can be improved.

[0010]

In the coaxial dielectric resonator 51 described above, it is difficult to reduce the size of the resonator itself and it is difficult to adjust the resonance frequency, as already described. It was Further, when the coaxial dielectric resonator 51 is mounted on the circuit board 40a, it is difficult to mount and fix it by using the solder 43b because of the cylindrical shape, and the connecting circuit pattern 42a is formed by using the coupling pins 45 and 46. There is a problem in that connecting to the above is an upside down manufacturing process. Further, since the coupling pins 45 and 46 are interposed, it is difficult to reduce the size of the circuit boards 40a and 40b.

Further, in the above-described high frequency resonator 61, since the dielectric block 12 is formed in a substantially rectangular parallelepiped shape, it is easy to attach and fix the high frequency resonator 61 to the circuit board 40c. The connection electrode 63 and the connection circuit pattern 42a must be connected by using the coupling pin 47, which is an upside down of the manufacturing process and the circuit board 4
There is a problem that it is difficult to reduce the size of 0c.

The present invention has been made in view of the above problems, and it is possible to easily connect the internal electrodes to the connection circuit pattern and to reduce the size of the circuit board. Further, the size is small and the Q value is small. The object is to provide a high frequency resonator having a high value.

[0013]

In order to achieve the above object, a high frequency resonator according to the present invention has an external electrode formed on the surface of a dielectric block, and a flat plate-shaped inside the dielectric block. The internal electrode is embedded in close contact with the dielectric block, and the extraction electrode connected to the end of the internal electrode is continuously formed on at least two surfaces of the dielectric block in addition to the external electrode. Is characterized by (1).

Further, in the high frequency resonator according to the present invention, an external electrode is formed on the surface of the dielectric block, and two or more flat plate-shaped internal electrodes are overlapped with each other with the dielectric material sandwiched inside the dielectric block. And a lead-out electrode which is embedded in close contact with the dielectric block and connected to an end of the internal electrode is continuously formed on at least two surfaces of the dielectric block in addition to the external electrode. (2).

Further, in the high frequency resonator according to the present invention, an external electrode is formed on the surface of the dielectric block, and two or more flat plate-shaped internal electrodes are overlapped with each other with the dielectric material sandwiched inside the dielectric block. Embedded in close contact with the dielectric block, the vicinity of the end of the internal electrode is electrically connected,
The extraction electrode connected to the end of the internal electrode is formed continuously over at least two surfaces of the dielectric block other than the external electrode (3).

Further, the above (1), (2) or (3)
In the high frequency resonator described above, the dielectric block is parallel to the side surface and / or the upper and lower surfaces of the dielectric block.
It is characterized by having an external electrode structure that is symmetrical with respect to a plane that divides it into equal parts.

[0017]

According to the high frequency resonator described in (1) above, the external electrode is formed on the surface of the dielectric block, and the flat internal electrode is in close contact with the dielectric block inside the dielectric block. Since the extraction electrode that is embedded in the internal electrode and connected to the end of the internal electrode is continuously formed over at least two surfaces of the dielectric block other than the external electrode, the radiation loss is small and the effective relative permittivity is low. Will be prevented. Further, the extraction electrode is formed simultaneously with the formation of the external electrode, the extraction electrode is easily formed, and the external electrode is easily soldered at the same time as the external electrode is soldered when mounted on a circuit board. Further, since the coupling pin is unnecessary, the circuit board can be downsized.

Further, according to the high frequency resonator described in (2) above, the external electrode is formed on the surface of the dielectric block,
Inside the dielectric block, a flat plate-shaped internal electrode is overlapped with two or more layers with a dielectric material sandwiched therebetween and is embedded in close contact with the dielectric block, and a lead electrode connected to an end of the internal electrode is the external electrode. Since it is formed continuously over at least two surfaces of the dielectric block other than the electrodes, in addition to the function of the high frequency resonator described in (1), the resistance of the resonance circuit is substantially lowered, and the Q value is reduced. It can be improved.

Further, according to the high frequency resonator described in (3) above, the external electrode is formed on the surface of the dielectric block,
Inside the dielectric block, two or more layers of plate-shaped internal electrodes are overlapped with each other with a dielectric material sandwiched between them and embedded in close contact with the dielectric block, and the vicinity of the end of the internal electrode is electrically connected. Since the extraction electrode connected to the end of the internal electrode is continuously formed on at least two surfaces of the dielectric block surface in addition to the external electrode,
In addition to the action of the high frequency resonator described in (2), the resistance of the resonance circuit is substantially lower, and the Q value can be further improved.

Further, in the high-frequency resonator described in (1), (2), and (3) above, the resonator is parallel to the side surface or the upper and lower surfaces of the dielectric block and is symmetrical with respect to a plane that bisects the dielectric block. If you have an electrode structure,
In addition to the action of the high frequency resonator described in each of (1), (2) and (3), when mounting on a circuit board, the left or right side or the upper side of the high frequency resonator may face down. It can be mounted, and the variety of mounting patterns on the circuit board is improved.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a high frequency resonator according to the present invention will be described below with reference to the drawings.

Each of the following embodiments is used as a high frequency resonator which resonates at a quarter wavelength of a high frequency.

FIG. 1 is a diagram schematically showing a first embodiment of a high frequency resonator according to the present invention, in which (a) is a plan view,
(B) has shown the XX sectional view in (a). In the figure, reference numeral 12 denotes a dielectric block, and the dielectric block 12 is made of a high frequency dielectric ceramics formed of a high dielectric material in a substantially rectangular parallelepiped shape. An internal electrode 13 is embedded in the dielectric block 12 so as to be in close contact therewith, and the internal electrode 13 is formed in a flat plate shape having the same length as the dielectric block 12, and the metal forming the internal electrode 13 is formed. As the conductor, Ag, Pd, Pt, Au, Cu, Ni, which has excellent workability and conductivity with respect to microwaves,
Co or an alloy containing at least one of these metals (however, Ni, Ni-based alloys, Co, Co-based alloys are limited to non-magnetic materials) is used.

External electrodes 14 are formed on the dielectric block surfaces 12a, 12c to 12f in the range shown by S in the figure, and the dielectric block surface 1 in the range shown by L in the figure.
Lead electrodes 21 are continuously formed on 2b to 12f. The right end portion of the internal electrode 13 is connected to the extraction electrode 21, and the dielectric block 12, the internal electrode 13, the external electrode 14, and the extraction electrode 21 constitute the high frequency resonator 11. An external electrode structure 22 composed of the external electrode 14 and the extraction electrode 21
Is parallel to the dielectric block surfaces (side surfaces) 12c and 12d and the dielectric block surfaces (upper and lower surfaces) 12e and 12f,
Moreover, it is symmetrical with respect to a plane that divides the dielectric block 12 into two equal parts.

FIG. 6 is a cross-sectional view schematically showing a state in which the high frequency resonator according to the first embodiment is mounted on a circuit board, and 41 in the figure shows the board. A connection circuit pattern 42a and a ground electrode 42b are formed on the substrate 41, respectively, and a coupling capacitor 44 is interposed in the connection circuit pattern 42a and connected using solder 43a or the like. When the high frequency resonator 11 is mounted on the circuit board 40 configured as described above, the external electrode 14 and the extraction electrode 21 are placed on the ground electrode 42b and the connection circuit pattern 42a at predetermined positions, and the solder 43b, 43c
Etc. to connect and fix. Then, the high frequency signal is transmitted to the connection circuit pattern 42a, the capacitor 44, and the extraction electrode 21.
Is input to the high frequency resonator 11 via the lead electrode 21, the extraction electrode 21, the capacitor 44, or the connection circuit pattern 42.
It will be output via a.

In the high frequency resonator 11 according to the first embodiment having the above structure, the surface 12a of the dielectric block 12 is
External electrodes 14 are formed on 12c to 12f, and a flat plate-shaped internal electrode 13 is embedded inside the dielectric block 12 so as to be in close contact with the dielectric block 12, so that the radiation loss is small and the effective relative permittivity is low. The decrease can be prevented. In addition to the external electrodes 14, the extraction electrodes 21 connected to the ends of the internal electrodes 13 have dielectric block surfaces 12b to 12f.
Since the lead electrodes 21 are easily formed at the same time when the external electrodes 14 are formed since they are continuously formed over (five sides), the solder 43b of the external electrodes 14 can be attached when the external electrodes 14 are mounted on the circuit board 40. At the same time, the extraction electrode 21
The solder 43c can be easily attached, and the connecting pin 47 (FIG. 11) is unnecessary, so that the circuit board 40 can be downsized. Further, the circuit board 40 has the external electrode structure 22 which is parallel to the side surfaces 12c and 12d and the upper and lower surfaces 12e and 12f of the dielectric block 12 and which is symmetrical with respect to the plane that bisects the dielectric block 12.
When mounted on the circuit board, it can be mounted with either the left or right side of the high frequency resonator 11 facing down, and the variety of mounting patterns on the circuit board 40 can be improved.

2A and 2B are schematic views of the high frequency resonator according to the second embodiment. FIG. 2A is a plan view and FIG. 2B is a sectional view taken along line XX in FIG. The configuration of the high frequency resonator 31 shown in FIG. 2 is the same as that shown in FIG. 1 except for the internal electrodes, and therefore only the different points will be described. That is, the dielectric block 12
Internal electrode 1 formed in the same manner as that shown in FIG.
3a, 13b and 13c are overlapped with each other with the dielectric portion 15 interposed therebetween, and are embedded in close contact with the dielectric block 12 and the dielectric portion 15.

The high frequency resonator 31 thus configured
In addition to the action of the high frequency resonator 11, the internal electrodes 13a, 13b, 13c overlap with each other with the dielectric portion 15 sandwiched therebetween and are embedded in the dielectric block 12 and the dielectric portion 15 in close contact with each other. The effect similar to that of No. 1 can be obtained, and the resistance of the resonance circuit can be substantially reduced, and the Q value can be improved.

3A and 3B are diagrams schematically showing a high-frequency resonator according to the third embodiment. FIG. 3A is a plan view and FIG. 3B is a sectional view taken along line XX in FIG. The configuration of the high frequency resonator 32 shown in FIG. 3 is the same as that shown in FIG. 2 except for the connection electrodes, and therefore the configuration will be described only for different points. That is, the internal electrodes 13a, 1
3b and 13c are electrically connected by a connection electrode 16 in the vicinity of the end on the dielectric block surface 12b side.

The high frequency resonator 32 having the above structure
Then, in addition to the action of the high frequency resonator 31, since the vicinity of the end portions of the internal electrodes 13a, 13b, 13c are electrically connected, the same effect as that of the second embodiment can be obtained, and the resonance The resistance of the circuit is substantially lower and the Q value can be further improved.

FIG. 4 is a diagram schematically showing a high-frequency resonator according to the fourth embodiment. (A) is a plan view and (b) is a sectional view taken along line XX in (a). The configuration of the high-frequency resonator 33 shown in FIG. 4 is the same as that shown in FIG. 2 except for the shape of the extraction electrode, so only the different points will be described. That is, W in the figure
Dielectric block surface 12b in the range indicated by ₁ , H and L
A lead electrode 23 is continuously formed on the lead electrode 12f, and the right ends of the internal electrodes 13a, ... Are connected to the lead electrode 23, respectively.

The high frequency resonator 33 thus constructed
Then, the same effect as that of the second embodiment can be obtained, and the material of the extraction electrode 21 can be reduced.

FIG. 5 is a diagram schematically showing a high-frequency resonator according to the fifth embodiment. (A) is a plan view and (b) is a sectional view taken along line XX in (a). The configuration of the high-frequency resonator 34 shown in FIG. 5 is the same as that shown in FIG. 4 except for the shape of the extraction electrode, so only the different points will be described. That is, W in the figure
₂ , dielectric block surface 12b in the range indicated by H, L
An extraction electrode 25 is continuously formed on 12d and 12f, and the extraction electrode 25 is connected to the right ends of the internal electrodes 13a ,.

In the high frequency resonator 34 according to the fifth embodiment thus configured, the same effect as that of the fourth embodiment can be obtained, and the material of the extraction electrode 25 can be further reduced.

[0035]

As described above in detail, in the high frequency resonator (1) according to the present invention, the external electrodes are formed on the surface of the dielectric block, and the dielectric block has a flat plate shape inside. Internal electrodes are embedded in close contact with the dielectric block, and lead electrodes connected to the ends of the internal electrodes are continuously formed on at least two surfaces of the dielectric block in addition to the external electrodes. Therefore, the radiation loss is small and the effective relative permittivity can be prevented from lowering. Further, the extraction electrode can be easily formed at the same time when the external electrode is formed, and furthermore, the external electrode can be easily soldered at the same time when the external electrode is soldered when mounted on a circuit board, Further, since the coupling pin is unnecessary, the circuit board can be downsized.

Further, in the high frequency resonator (2) according to the present invention, the external electrode is formed on the surface of the dielectric block, and the flat internal electrode has the dielectric inside the dielectric block. Two or more layers sandwiched therebetween are closely embedded in the dielectric block and embedded therein, and lead electrodes connected to the ends of the internal electrodes are continuously formed on at least two surfaces of the dielectric block in addition to the external electrodes. Therefore, in addition to the effect of the high-frequency resonator described in (1), the resistance of the resonant circuit is substantially reduced, and the Q value can be improved.

Further, in the high frequency resonator (3) according to the present invention, an external electrode is formed on the surface of the dielectric block, and a flat plate-shaped internal electrode has the dielectric inside the dielectric block. Two or more layers are sandwiched in between and embedded in close contact with the dielectric block, the vicinity of the end of the internal electrode is electrically connected, and the extraction electrode connected to the end of the internal electrode is provided in addition to the external electrode. Since it is formed continuously over at least two surfaces of the dielectric block,
In addition to the effect of the high frequency resonator described in (2), the resistance of the resonance circuit is substantially lower, and the Q value can be further improved.

Further, in the high-frequency resonators (1), (2), and (3) according to the present invention, they are parallel to the side surface or the upper and lower surfaces of the dielectric block and are symmetrical with respect to the plane that divides the dielectric block into two parts. In the case of having an external electrode structure, in addition to the effects of the high frequency resonators described in (1), (2), and (3), when mounted on a circuit board, the left and right sides of the high frequency resonator are mounted. Alternatively, it can be mounted with either of the upper and lower sides facing down, and the variety of mounting patterns on the circuit board can be improved.

[Brief description of drawings]

1A and 1B are diagrams schematically showing a first embodiment of a high frequency resonator according to the present invention, in which FIG. 1A is a plan view and FIG. 1B is FIG. 1A.
XX line sectional drawing in is shown.

2A and 2B are diagrams schematically showing a high frequency resonator according to a second embodiment, in which FIG. 2A is a plan view and FIG. 2B is a sectional view taken along line XX in FIG.

3A and 3B are diagrams schematically showing a high frequency resonator according to a third embodiment, in which FIG. 3A is a plan view and FIG. 3B is a sectional view taken along line XX in FIG.

4A and 4B are diagrams schematically showing a high-frequency resonator according to Example 4, where FIG. 4A is a plan view and FIG. 4B is a sectional view taken along line XX in FIG. 4A.

5A and 5B are diagrams schematically showing a high frequency resonator according to a fifth embodiment, in which FIG. 5A is a plan view and FIG. 5B is a sectional view taken along line XX in FIG.

FIG. 6 is a cross-sectional view schematically showing a state in which the high frequency resonator according to the first embodiment is mounted on a circuit board.

7A and 7B are diagrams schematically showing a conventional coaxial dielectric resonator, in which FIG. 7A is a perspective view and FIG. 7B is XX in FIG.
The line sectional view is shown.

FIG. 8 is a cross-sectional view schematically showing a state in which a conventional coaxial dielectric resonator is mounted on a circuit board.

FIG. 9 is a cross-sectional view schematically showing another state in which a conventional coaxial dielectric resonator is mounted on a circuit board.

10A and 10B are diagrams schematically showing a high-frequency resonator previously proposed by the present inventors, where FIG. 10A is a plan view and FIG. 10B is a sectional view taken along line XX in FIG. 10A. .

FIG. 11 is a cross-sectional view schematically showing a state in which the high-frequency resonator previously proposed by the present inventors is mounted on a circuit board.

[Explanation of symbols]

 11, 31, 32, 33, 34 Resonator for high frequency 12 Dielectric block 12a, 12b Dielectric block surface (end surface) 12c, 12d Dielectric block surface (side surface) 12e, 12f Dielectric block surface (upper and lower surfaces) 13, 13a, 13b, 13c Internal electrode 14 External electrode 16 Connection electrode 21, 23, 25 Extraction electrode 22, 24, 26 External electrode structure

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Kikuyama 4-53-3 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture Sumitomo Metal Industries, Ltd.

Claims (4)

[Claims] 1. An external electrode is formed on the surface of a dielectric block, and a flat plate-shaped internal electrode is embedded in the dielectric block so as to be in close contact with the dielectric block, and at the end of the internal electrode. A high-frequency resonator characterized in that the connected extraction electrodes are continuously formed over at least two surfaces of the dielectric block other than the external electrodes. 2. An external electrode is formed on the surface of the dielectric block, and a flat plate-shaped internal electrode is stacked inside the dielectric block so as to overlap two or more layers with the dielectric material sandwiched therebetween and to be in close contact with the dielectric block. A high-frequency resonator characterized in that a lead-out electrode which is embedded and connected to an end of the internal electrode is continuously formed on at least two surfaces of the dielectric block in addition to the external electrode. 3. An external electrode is formed on the surface of the dielectric block, and a flat plate-shaped internal electrode is stacked inside the dielectric block so that two or more layers are overlapped with each other with a dielectric interposed therebetween, and the dielectric block is in close contact with the dielectric block. An extraction electrode that is embedded and electrically connected near the end of the internal electrode and that is connected to the end of the internal electrode is continuously formed on at least two surfaces of the dielectric block other than the external electrode. A high-frequency resonator characterized in that 4. An external electrode structure which is parallel to a side surface and / or an upper and lower surface of the dielectric block and is symmetrical with respect to a plane that bisects the dielectric block. The high frequency resonator according to claim 2 or claim 3.