JPH08228102A - Circuit device provided with dielectric filter - Google Patents

Abstract

PURPOSE: To provide the circuit device provided with dielectric filter which enables high-density mounting with simple structure. CONSTITUTION: A dielectric resonator 10 equipped with a dielectric block 11 having a resonance hole, inner conductor 14 formed on the inner surface of the resonance hole of the dielectric block 11, and outer conductor 16 formed on the outer peripheral side of the dielectric block 11, is provided. A capacitor 20 conducted with the inner conductor 14 of this dielectric resonator 10 and respectively confronting plural electrodes 23 and 24 through a dielectric to the outer peripheral side of a conductor 17 separated from the outer conductor 16 is formed. This dielectric resonator 10 is mounted on a circuit board (a), one electrode 24 on the outer peripheral side of that capacitor 20 is connected and fixed to land electrodes (b) and (b) on the circuit board (a) as an input/ output electrode, and the outer conductor 16 is connected and fixed to the land electrodes on the circuit board (a). Further, another electrode 23 of the capacitor 20 of the dielectric resonator is connected and fixed to the correspondent electrode 23 of the other dielectric resonator 10 as a connecting electrode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit device provided with a dielectric filter used in a voltage control oscillator of a communication device such as a mobile telephone or a personal radio, and more particularly to a plurality of chip-shaped dielectric resonators. The present invention relates to a circuit device in which these are mounted on a circuit board to form a dielectric filter.

[0002]

2. Description of the Related Art A dielectric resonator is one in which an inner conductor and an outer conductor are provided on an inner circumference and an outer circumference of a dielectric block having a resonance hole, for example, a distributed constant type dielectric resonance of 1/4 wavelength. In the container, the inner conductor and the outer conductor are connected at the end surface of the dielectric block. In such a dielectric resonator, in order to obtain an input coupling capacitance, a capacitor is coupled to the input terminal side, and the dielectric resonators are connected to each other via a capacitor to form a dielectric filter.

For example, FIGS. 5 and 6 show an example of a dielectric filter in which two sets of dielectric resonators are mounted on a circuit board a and are coupled via a capacitor. That is, the insulating substrate 52 is formed on the circuit board a, and the electrodes 53a, 53b, 53, which are divided into four and are close to each other, are formed thereon.
c and 53d are formed. Electrodes 53a, 53 on both ends
An input terminal 58 and an output terminal 59 are connected to d.

As described above, the dielectric resonator is one in which the inner conductor 54 and the outer conductor 56 are provided on the inner circumference and the outer circumference of the dielectric block 51, and is formed on the end surface of the dielectric block 51. The inner conductor 54 and the outer conductor 5 with the end face electrode 55
6 and 6 are connected. This dielectric resonator is mounted side by side on the circuit board a close to the electrodes 53a to 53d, and their inner conductors 54 are connected via the connection terminals 57 to the electrodes 5a.
It is connected to 3b and 53c.

An equivalent circuit of the dielectric filter shown in FIGS. 5 and 6 is shown in FIG. That is, an LC resonance circuit is formed by the dielectric resonator, which is the electrodes 53a and 53a.
The gaps between b, 53b and 53c and 53c and 53d are capacitors, which are designated as C ₁ , C ₂ and C ₃ , respectively. One electrode 53a and 53d of the capacitor C ₁ and C ₃ become respectively input and output terminals.

[0006]

However, in the conventional circuit board having the dielectric filter as described above, the insulating substrate 52 and the electrodes 53a to 53 are provided on the circuit board a.
Since d must be provided and the dielectric resonator must be connected to these via the connection terminal 57, the structure becomes complicated and the area occupied on the circuit board becomes large. In particular, when widening the pass band of the filter, it is necessary to obtain a large input / output coupling, so that it is necessary to widen the area where the electrodes of the electrodes 53a to 53d face each other, which is the area occupied on the circuit board. Will increase. For these reasons, the conventional dielectric filter has a problem that the manufacturing cost is high and it is difficult to realize high-density mounting. SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the drawbacks of the conventional circuit board having the dielectric filter and to provide a circuit board having a dielectric filter with a simple structure and capable of high-density mounting.

[0007]

That is, a circuit board provided with a dielectric filter according to the present invention includes a dielectric block 11 having a resonance hole and an inner conductor 14 formed on the inner surface of the resonance hole of the dielectric block 11. And a dielectric resonator 10 having an outer conductor 16 formed on the outer peripheral side of the dielectric block 11, and between a conductor 17 electrically connected to an inner conductor 14 of the dielectric resonator 10 and an input / output electrode. Formed capacitor 20
And a circuit board a having a land electrode b formed on its main surface, the inner conductor 14 of the dielectric resonator 10
The plurality of electrodes 23, 24 are electrically connected to the outer conductor 16 and are separated from the outer conductor 16, and a plurality of electrodes 23, 24 are made to face each other through a dielectric material.
A capacitor 20 for obtaining a capacitance is formed between and, the dielectric resonator 10 is mounted on the circuit board a, and
One electrode 24 on the outer peripheral side of the capacitor 20 is connected and fixed to the land electrode b on the circuit board a as an input / output electrode,
The outer conductor 16 is connected and fixed to the land electrode of the circuit board a as an input / output electrode, and the other electrode 23 of the capacitor 20 is adjacent to the other dielectric resonator 10 as a connecting electrode.
Of the dielectric resonators 10 are electrically coupled to each other via a capacitor whose capacitance is obtained between the electrodes 23 and the conductor 17 by being fixedly connected to the corresponding electrodes 23 of the above. It is characterized by.

Here, in the state where the two dielectric resonators 10, that is, the first and second dielectric resonators 10 are mounted on the circuit board a, the other electrode on the outer peripheral side of the capacitors 20 thereof. There are those in which 23 is directly connected without a land electrode, and those in which those electrodes 23, 23 are connected to each other between adjacent dielectric resonators 10 via a land electrode c on the circuit board a. Including. The land electrodes b and c on the circuit board a are formed on the same main surface of the circuit board a. Further, here, it is also possible to connect three or more dielectric resonators 10. In that case, in the intermediate dielectric resonator 10, the electrodes 23, 24 on the outer peripheral side of the capacitor 20 are provided.
Together serve as connection electrodes connected to the outer peripheral side electrodes 23 and 24 of another dielectric resonator 10. For the dielectric block 11 of the dielectric resonator 10, for example, a tubular dielectric is used. Then, the conductor 17 that is electrically connected to the inner conductor 14 of the dielectric resonator 10
The outer conductor 16 and the outer conductor 16 are separated from each other by a step portion formed on the outer periphery of the dielectric block 11. Further, the capacitor 20 is, for example, a ring-shaped one fitted to the conductor 17 side of the dielectric block 11. Such a dielectric filter usually has two adjacent dielectric resonators 10.
They are electrically coupled to each other by the series connection of two capacitors.

[0009]

In the circuit board provided with the dielectric filter according to the present invention, a plurality of conductors 17 which are electrically connected to the inner conductor 14 of the dielectric resonator 10 and separated from the outer conductor 16 are provided on the outer peripheral side via the dielectric. By making the electrodes 23 and 24 face each other,
A capacitor 20 for obtaining a capacitance is formed between the electrodes 23 and 24 and the conductor 17, and the capacitor 2
Since the other electrode 23 on the outer peripheral side of 0 is connected to the corresponding electrode 23 of the other adjacent dielectric resonator 10, the dielectric resonator 10 can be provided without providing a separate capacitor portion on the circuit board a. It is possible to obtain the input / output capacitive coupling integrated with. Then, the separated one electrode 23 of the capacitor 20.
Are connected to each other with a plurality of dielectric resonators 10 and the other outer peripheral side electrode 24 is used as an input / output electrode, the plurality of dielectric resonators 10 are connected via the capacitor 20 and the input / output electrodes are connected. A dielectric filter having a coupling capacitance formed between and can be formed on the circuit board a. Further, one electrode 24 on the outer peripheral side used as this input / output electrode is
Since it is arranged to be connectable to the land electrode b on the circuit board a, the dielectric resonator 10 can be easily mounted on the circuit board a, and the dielectric resonator 10 can be mounted on the circuit board a. Thus, the dielectric filter can be easily constructed.

[0010]

EXAMPLES Next, examples of the present invention will be described concretely and in detail. As shown in FIGS. 1 to 3, a circuit board provided with a dielectric filter according to an embodiment of the present invention includes a dielectric resonator 10, a ring-shaped capacitor 20, and a circuit board a. The dielectric block 11 of the dielectric resonator 10 has a cylindrical shape having a through hole at the center as a resonance hole, and one end side thereof is a small-diameter portion 13 having a diameter smaller than that of the other end side.

A conductor film is formed as the inner conductor 14 on the inner surface of the through hole of the dielectric block 11, and the dielectric block 11 is formed.
A conductor film is formed as the outer conductor 16 on the outer peripheral side of the large diameter portion 12. Further, the large diameter portion 12 of the dielectric block 11
A conductor film is formed as the short-circuit conductor 15 on the side end face, and the inner conductor 14 and the outer conductor 16 are short-circuited and connected by the short-circuit conductor 15. A conductor film is formed as an input side conductor 17 on the outer peripheral side of the small diameter portion 13 of the dielectric block 11. This is connected to the inner conductor 14 via a conductor formed on the end surface of the dielectric block 11 on the side of the small diameter portion, but the end surface of the step portion between the small diameter portion 13 and the large diameter portion 12 of the dielectric block 11 No conductor film is formed on 18, so that the input-side conductor 17 and the outer conductor 16 are insulated.

On the other hand, the ring-shaped capacitor 20 is formed by forming an inner-circumferential-side electrode 22 and outer-circumferential-side electrodes 23 and 24 which face the inner and outer peripheries of a ring-shaped dielectric element body 21. 23 and 24 are separated into two. The inner diameter of the capacitor 20 is equal to the small diameter portion 1 of the dielectric resonator 10.
3, the outer diameter of the input-side conductor 17 of the small-diameter portion 13 of the dielectric block 11 is almost the same. The ring-shaped capacitor 20 is fitted to the small diameter portion 13 of the dielectric resonator 10, and the inner electrode 22 of the capacitor 20 is soldered to the input side conductor 17 of the small diameter portion 13 of the dielectric resonator 10. Alternatively, they are connected by means such as adhesion with a conductive adhesive.

The conductors 14, 15 of the dielectric resonator 10,
Generally, 16 and 17 are formed on the surface of the dielectric block 11 by a method of plating by electroless plating or a method of applying a conductive paste and baking. For example, after copper plating is applied to the entire inner and outer peripheral surfaces and end surfaces of the stepped dielectric block 11 having the small-diameter portion 13 and the large-diameter portion 12 formed to have a predetermined length, The plating film on the end face and the end face 18 of the step portion is etched. further,
While forming the input side conductor 17 on the peripheral surface of the small diameter portion 13,
A conductor is formed on the end surface of the small diameter portion 13. Alternatively, the conductive film may be formed only on the necessary portion by a so-called masking method, in which the conductive film is formed on the surface of the dielectric block 11 in a state where the unnecessary portion is masked in advance without using the etching. The electrodes 22, 23, 2 of the capacitor 20
4 is also formed by a substantially similar method.

The circuit board a has a plurality of the dielectric resonators 10 mounted thereon, and corresponds to the electrodes 24 on the outer peripheral side of the capacitors 20 and the outer conductors 16 which are the input / output electrodes of the mounted dielectric resonators 10. Land electrodes b are formed. 1 to 3 show an example in which the two dielectric filters manufactured as described above are mounted on a circuit board a and are connected to each other to form a dielectric filter. That is, the electrodes 23 on the outer peripheral side of the ring-shaped capacitor 20 are connected to each other by the solder 25, these dielectric filters are mounted on the circuit board a, and the electrodes on the other outer peripheral side of the ring-shaped capacitor 20 are mounted. 24 is connected to the electrode land b with solder 26. The electrode land b serves as an input / output terminal as it is.

FIG. 7 shows an equivalent circuit of this dielectric filter. As shown in the figure, the dielectric resonator 10 side constitutes a resonance circuit in which an inductor L and a capacitor C are connected in parallel. Further, between the dielectric filter, the electrode 23 on the outer peripheral side and the electrode 2 on the inner peripheral side of the ring-shaped capacitor are arranged.
Capacitors C ₂₁ and C ₂₂ are formed by the capacitance formed between the capacitors C ₂₁ and C ₂₂ . Further, the electrostatic capacitances C ₁ and C ₃ are formed by the electrostatic capacitance formed between the outer peripheral side electrode 24 and the inner peripheral side electrode 22 connected to the electrode land b.

Next, FIG. 4 shows another embodiment of the present invention.
In the above-described embodiment, one electrode 23 of the ring-shaped capacitor is directly connected to each other by the solder 25, but in the embodiment shown in FIG. 4, both electrodes are connected to the electrode land c formed on the circuit board a. By connecting the outer peripheral side electrodes 23 to each other, the outer peripheral side electrodes 23 are connected to each other through the same electrode land c. In addition, the embodiment shown in FIGS.
In each case, as shown in FIG. 7, two dielectric resonators 10 are connected, but it is also possible to connect three or more dielectric resonators in the same manner. In that case, in the intermediate dielectric resonator 10, the electrode 2 on the outer peripheral side of the capacitor 20 is provided.
3 and 24 are both electrodes 23 on the outer peripheral side of another dielectric filter,
It is used as a connection electrode connected to 24.

Further, in the dielectric filter according to the above-mentioned embodiment, the dielectric resonator 10 and the capacitor 20 are both circular and have a cylindrical shape as a whole, but these are, for example, a rectangular tube shape. May be The dielectric filter configured by combining these has a rectangular tube shape as a whole. Furthermore, the dielectric resonator 10 and the capacitor 2
One of 0 may have a rectangular outer shape and the other may have a cylindrical shape.

[0018]

As described above, according to the present invention, it is possible to form the capacitive coupling by the capacitor 20 integrated with the dielectric resonator 10 without forming another capacitor on the circuit board. Therefore, the effect that the mounting on the circuit board is simplified, the space is saved, and the circuit board including the dielectric filter capable of high-density mounting can be provided.

[Brief description of drawings]

FIG. 1 is a partial half-section partial perspective view of a circuit board provided with a dielectric filter showing an embodiment of the present invention.

FIG. 2 is a partial front view of a circuit board including a dielectric filter according to the same embodiment.

FIG. 3 is a partial plan view of a circuit board having a dielectric filter according to the same embodiment.

FIG. 4 is a partial plan view of a circuit board having a dielectric filter according to another embodiment of the present invention.

FIG. 5 is a partial plan view of a circuit board provided with a dielectric filter showing a conventional example.

FIG. 6 is a partial front view of a circuit board including a dielectric filter showing the conventional example.

FIG. 7 is a connection diagram showing an equivalent circuit of a circuit board provided with a dielectric filter according to an embodiment of the present invention.

FIG. 8 is a connection diagram showing an equivalent circuit of a circuit board provided with a dielectric filter according to a conventional example.

[Explanation of symbols]

 10 Dielectric Resonator 11 Dielectric Block 14 Inner Conductor 16 Outer Conductor 20 Capacitor 21 Dielectric Element 22 Internal Capacitor Electrode 23 External Capacitor Electrode 24 External Capacitor Electrode a Circuit Board b Circuit Board Land Electrode c Circuit board land electrode

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuya Imaizumi 6-16-20 Ueno Taito-ku, Tokyo Taiyo Induction Co., Ltd.

Claims (30)

[Claims] 1. A dielectric block (11) having a resonant hole.
And a dielectric resonator having an inner conductor (14) formed on the inner surface of the resonance hole of the dielectric block (11) and an outer conductor (16) formed on the outer peripheral side of the dielectric block (11). (10) and an inner conductor (14) of the dielectric resonator (10)
A dielectric filter having a capacitor (20) formed between a conductor (17) electrically connected to the substrate and an input / output electrode, and a circuit board (a) having a land electrode (b) formed on its main surface is provided. In the circuit device, conducting with the inner conductor (14) of the dielectric resonator (10),
Moreover, a plurality of electrodes (23) and (24) are made to face each other on the outer peripheral side of the conductor (17) separated from the outer conductor (16) through a dielectric, thereby making these electrodes (23) and (24).
Between the capacitor and the conductor (17) to obtain a capacitance (2
0) is formed, the dielectric resonator (10) is mounted on the circuit board (a), and one electrode (24) on the outer peripheral side of the capacitor (20) serves as an input / output electrode. (A) is connected and fixed to the land electrode (b), the outer conductor (16) is connected and fixed to the land electrode of the circuit board (a) as an input / output electrode, and the other electrode of the capacitor (20) (2
3) another dielectric resonator (1) which is adjacent as a connection electrode
0) are connected and fixed to the corresponding electrodes (23), the dielectric resonators (10) are electrically connected to each other via a capacitor that obtains a capacitance between these electrodes (23) and the conductor (17). A circuit device having a dielectric filter characterized by being coupled. 2. A land electrode (b) on a circuit board (a),
The circuit device having a dielectric filter according to claim 1, wherein (c) is formed on the same main surface of the circuit board (a). 3. The circuit device having a dielectric filter according to claim 1, wherein the dielectric block (11) is a tubular dielectric. 4. The dielectric filter according to claim 1, wherein the dielectric resonators (10) are electrically coupled to each other by connecting two capacitors in series. Circuit device. 5. An inner conductor (14) of a dielectric resonator (10)
The conductor (17) and the outer conductor (16) that are electrically connected to each other are separated from each other by a step portion formed on the outer periphery of the dielectric block (11). A circuit device comprising the dielectric filter according to claim 1. 6. An inner conductor (14) of a dielectric resonator (10)
A capacitor (2) that obtains a capacitance between a conductor (17) that conducts with the electrodes and electrodes (23) and (24) that face each other via a dielectric.
A circuit having a dielectric filter according to any one of claims 1 to 5, characterized in that 0) is a ring-shaped member fitted on the conductor (17) side of the dielectric block (11). apparatus. 7. A dielectric block (11) having a resonant hole.
And a dielectric resonator having an inner conductor (14) formed on the inner surface of the resonance hole of the dielectric block (11) and an outer conductor (16) formed on the outer peripheral side of the dielectric block (11). (10) and an inner conductor (14) of the dielectric resonator (10)
A dielectric filter having a capacitor (20) formed between a conductor (17) electrically connected to the substrate and an input / output electrode, and a circuit board (a) having a land electrode (b) formed on its main surface is provided. In the circuit device, conducting with the inner conductor (14) of the dielectric resonator (10),
Moreover, a plurality of electrodes (23) and (24) are made to face each other on the outer peripheral side of the conductor (17) separated from the outer conductor (16) through a dielectric, thereby making these electrodes (23) and (24).
Between the capacitor and the conductor (17) to obtain a capacitance (2
0) is formed, the dielectric resonator (10) is mounted on the circuit board (a), and one electrode (24) on the outer peripheral side of the capacitor (20) serves as an input / output electrode. (A) is connected and fixed to the land electrode (b), the outer conductor (16) is connected and fixed to the land electrode of the circuit board (a) as an input / output electrode, and the other electrode of the capacitor (20) (2
3) another dielectric resonator (1) which is adjacent as a connection electrode
0) and the corresponding electrode (23) are connected and fixed to the land electrode (c) on the circuit board (a) to obtain a capacitance between the electrode (23) and the conductor (17). A circuit device having a circuit device having a dielectric filter, wherein the dielectric resonators (10) are electrically coupled to each other. 8. A land electrode (b) on a circuit board (a),
The circuit device having a dielectric filter according to claim 7, wherein (c) is formed on the same main surface of the circuit board (a). 9. The circuit device having a dielectric filter according to claim 7, wherein the dielectric block (11) is a cylindrical dielectric. 10. The dielectric filter according to claim 7, wherein the dielectric resonators (10) are electrically coupled to each other by a series connection of two capacitors. Circuit device. 11. An inner conductor (1) of a dielectric resonator (10).
4) The conductor (17) and the outer conductor (16) which are electrically connected to each other are separated from each other by a step portion formed on the outer circumference of the dielectric block (11). A circuit device provided with the dielectric filter according to claim 1. 12. An inner conductor (1) of a dielectric resonator (10)
4) is a conductor (1) of the dielectric block (11), which is a capacitor (20) that obtains a capacitance between a conductor (17) electrically connected to the conductor block (4) and electrodes (23) and (24) facing each other via a dielectric.
The circuit device provided with the dielectric filter according to any one of claims 7 to 11, wherein the circuit device is made of a ring-shaped member fitted to the 7) side. 13. A dielectric block (1) having a resonance hole.
1) which has an inner conductor (14) formed on the inner surface of the resonance hole of the dielectric block (11) and an outer conductor (16) formed on the outer peripheral side of the dielectric block (11) And a second dielectric resonator (10) and a conductor (1) electrically connected to the inner conductor (14) of the first and second dielectric resonators (10).
7) and a capacitor (20) each formed between an input / output electrode and a circuit board (a) having a land electrode (b) formed on a main surface thereof. The first dielectric resonator (10) has an inner conductor (1
4) a plurality of electrodes (2) are provided on the outer peripheral side of the conductor (17) which is electrically connected to the outer conductor (16) and is electrically connected to
A capacitor (20) for obtaining a capacitance is formed between the electrodes (23), (24) and the conductor (17) by making the electrodes (23), (24) face each other, and the second dielectric resonance The container (10) has an inner conductor (1
4) a plurality of electrodes (2) are provided on the outer peripheral side of the conductor (17) which is electrically connected to the outer conductor (16) and is electrically connected to the outer conductor (16).
3) and (24) are opposed to each other to form a capacitor (20) for obtaining a capacitance between the electrodes (23) and (24) and the conductor (17). The dielectric resonator (10) is mounted adjacently on the circuit board (a), and one electrode on the outer peripheral side of the capacitors (20) of the first and second dielectric resonators (10). (24) are connected and fixed to the land electrodes (b) on the circuit board (a) as input / output electrodes, and the outer conductors (16) of these first and second dielectric resonators (10)
Are connected and fixed to the land electrodes of the circuit board (a) as input / output electrodes respectively, and these first and second dielectric resonators (1
The other electrode (23) of the capacitor (20) of (0) is connected and fixed to each other as a connecting electrode, so that a capacitance is obtained between the electrode (23) and the conductor (17) to thereby obtain a dielectric substance. A circuit device having a dielectric filter, characterized in that the resonators (10) are electrically coupled to each other. 14. The dielectric according to claim 13, wherein the land electrodes (b) and (c) on the circuit board (a) are formed on the same main surface of the circuit board (a). Circuit device with body filter. 15. The circuit device having a dielectric filter according to claim 13, wherein the dielectric block (11) is a tubular dielectric. 16. The dielectric filter according to claim 13, wherein the dielectric resonators (10) are electrically coupled to each other by a series connection of two capacitors. Circuit device. 17. An inner conductor (1) of a dielectric resonator (10).
The conductor (17) and the outer conductor (16) that are electrically connected to 4) are separated from each other by a step portion formed on the outer circumference of the dielectric block (11). A circuit device provided with the dielectric filter according to claim 1. 18. An inner conductor (1) of a dielectric resonator (10).
4) is a conductor (1) of the dielectric block (11), which is a capacitor (20) that obtains a capacitance between a conductor (17) electrically connected to the conductor block (4) and electrodes (23) and (24) facing each other via a dielectric.
The circuit device provided with the dielectric filter according to any one of claims 13 to 17, characterized in that the circuit device is made of a ring-shaped member which is fitted to the side 7). 19. A dielectric block (1) having a resonance hole.
1) which has an inner conductor (14) formed on the inner surface of the resonance hole of the dielectric block (11) and an outer conductor (16) formed on the outer peripheral side of the dielectric block (11) And a second dielectric resonator (10) and a conductor (1) electrically connected to the inner conductor (14) of the first and second dielectric resonators (10).
7) and a capacitor (20) each formed between an input / output electrode and a circuit board (a) having a land electrode (b) formed on a main surface thereof. The first dielectric resonator (10) has an inner conductor (1
4) a plurality of electrodes (2) are provided on the outer peripheral side of the conductor (17) which is electrically connected to the outer conductor (16) and is electrically connected to the outer conductor (16).
A capacitor (20) for obtaining a capacitance is formed between the electrodes (23), (24) and the conductor (17) by making the electrodes (23), (24) face each other, and the second dielectric resonance The container (10) has an inner conductor (1
4) a plurality of electrodes (2) are provided on the outer peripheral side of the conductor (17) which is electrically connected to the outer conductor (16) and is electrically connected to the outer conductor (16).
3) and (24) are opposed to each other to form a capacitor (20) for obtaining a capacitance between the electrodes (23) and (24) and the conductor (17). The dielectric resonator (10) is mounted adjacently on the circuit board (a), and one electrode on the outer peripheral side of the capacitors (20) of the first and second dielectric resonators (10). (24) are connected and fixed to land electrodes (b) on the circuit board (a) as input / output electrodes, respectively, and outer conductors (16) of the first and second dielectric resonators (10).
Are connected and fixed to the land electrodes of the circuit board (a) as input / output electrodes respectively, and these first and second dielectric resonators (1
The other electrode (23) of the capacitor (20) of (0) is connected and fixed together to the land electrode (c) on the circuit board (a) as a connection electrode, so that these electrode (23) and the conductor ( 17) A circuit device provided with a dielectric filter, characterized in that the dielectric resonators (10) are electrically coupled to each other via a capacitor that obtains a capacitance with. 20. The dielectric according to claim 19, wherein the land electrodes (b) and (c) on the circuit board (a) are formed on the same main surface of the circuit board (a). Circuit device with body filter. 21. The circuit device having a dielectric filter according to claim 19, wherein the dielectric block (11) is a tubular dielectric. 22. The dielectric filter according to claim 19, wherein the dielectric resonators (10) are electrically coupled to each other by a series connection of two capacitors. Circuit device. 23. An inner conductor (1) of a dielectric resonator (10)
23. The conductor (17) and the outer conductor (16) which are electrically connected to 4) are separated from each other by a step portion formed on the outer periphery of the dielectric block (11). A circuit device provided with the dielectric filter according to claim 1. 24. An inner conductor (1) of a dielectric resonator (10)
4) is a conductor (1) of the dielectric block (11), which is a capacitor (20) that obtains a capacitance between a conductor (17) electrically connected to the conductor block (4) and electrodes (23) and (24) facing each other via a dielectric.
24. The circuit device provided with the dielectric filter according to any one of claims 19 to 23, which is formed of a ring-shaped member that is fitted to the side 7). 25. A dielectric block (1) having a resonance hole.
1), a dielectric having an inner conductor (14) formed on the inner surface of the resonance hole of the dielectric block (11) and an outer conductor (16) formed on the outer peripheral side of the dielectric block (11) The resonator (10) and the inner conductor (1) of the dielectric resonator (10)
4), a capacitor (20) formed between the conductor (17) conducting to 4) and the input / output electrode, and a land electrode (b) on the main surface.
A circuit device provided with a dielectric filter having a circuit board (a) on which is formed, is electrically connected to an inner conductor (14) of the dielectric resonator (10),
In addition, a plurality of electrodes (23) separated on the outer peripheral side of the conductor (17) separated from the outer conductor (16) via a dielectric,
By making (24) face each other, these electrodes (2
A capacitor (20) for obtaining a capacitance is formed between the conductors (17) and (3) and (24), and the dielectric resonator (10) is mounted on the circuit board (a) and One electrode (24) on the outer peripheral side of the capacitor (20) is connected and fixed to the land electrode (b) on the circuit board (a) as an input / output electrode, and the outer conductor (16) serves as an input / output electrode on the circuit board ( a) A plurality of electrodes (23) and (24) on the outer periphery of the capacitor (20), which are connected and fixed to the land electrode of (a), correspond to a plurality of corresponding electrodes of another dielectric resonator (10) adjacent as connection electrodes ( 23), (2
These electrodes (2
3), a dielectric filter characterized in that adjacent dielectric resonators (10) are sequentially electrically coupled via a capacitor for obtaining a capacitance between (24) and the conductor (17) Circuit device. 26. The dielectric according to claim 25, wherein the land electrodes (b) and (c) on the circuit board (a) are formed on the same main surface of the circuit board (a). Circuit device with body filter. 27. The circuit device having a dielectric filter according to claim 25, wherein the dielectric block (11) is a tubular dielectric. 28. The dielectric filter according to claim 25, wherein the dielectric resonators (10) are electrically coupled to each other by connecting two capacitors in series. Circuit device. 29. An inner conductor (1) of a dielectric resonator (10)
The conductor (17) and the outer conductor (16) electrically connected to 4) are separated from each other by a step formed on the outer periphery of the dielectric block (11). A circuit device provided with the dielectric filter according to claim 1. 30. An inner conductor (1) of a dielectric resonator (10)
4) is a conductor (1) of the dielectric block (11), which is a capacitor (20) that obtains a capacitance between a conductor (17) electrically connected to the conductor block (4) and electrodes (23) and (24) facing each other via a dielectric.
30. The circuit device provided with the dielectric filter according to claim 25, which is formed of a ring-shaped member fitted to the 7) side.