JP2587992Y2 - Dielectric resonator - Google Patents

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.

[0002]

2. Description of the Related Art Dielectric resonators are used, for example, for mobile radio equipment such as automobile telephones, various radio equipments 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 coating or electroplating a transmission-line stripline conductor on a dielectric ceramic processed into a cylindrical shape.

In such a dielectric resonator, it is necessary to combine a plurality of resonators via an external capacitor in order to obtain a steep resonance characteristic, so that the overall size becomes large. There was a point.

The present invention has been made in view of the above-mentioned problems, and has as its object to provide a small-sized dielectric resonator that can obtain steep resonance characteristics.

[0005]

In order to achieve this object, the present invention provides a dielectric, a stripline conductor and a grounding conductor.
A laminated body obtained by laminating the electrodes and sintering, and embeds two or more layers of stripline conductors serving as transmission lines in a laminated structure inside the laminated body , and grounds electrodes between the stripline conductors of each layer. Embedded, each end of the strip line conductor of each layer is connected to a ground electrode adhered to the outer surface of the laminate, and the other end of the strip line conductor of each layer is
To cover the upper and lower edges of the end face of the laminate, respectively,
And to the terminal electrodes that are attached at a
And respectively connected to constitute a plurality of resonators in a single chip to form a window by removing a part of the ground electrode buried in said laminate, stripline adjacent to the stacking direction
The inner conductors are
Through the window at an extension provided on at least one of the
The resonators are coupled to each other by the capacitance of the opposed portion (claim 1). Further, according to the present invention , in the first aspect, a stream adjacent in the laminating direction is provided.
Upline conductors are provided on at least one of them
Instead of opposing at the extension,
At least one of the conductors is formed into a curved shape
Through the window, and by the capacity of the facing portion
The resonators are coupled to each other.
2). Also, the present invention provides a method as set forth in claim 1, wherein
Between adjacent stripline conductors
Instead of facing at least the extension provided on one side, the extension
Exits before adjacent stripline conductors are connected
The terminal electrode is opposed to the terminal electrode.
The resonators are coupled to each other (claim 3).

[0006] The present invention is directed to claims 1 to 3.
Stripline conductor that becomes the transmission line
Are provided in three or more layers to form a duplexer in one chip.
(Claim 4) .

[0007]

The dielectric resonator according to the present invention has the above-mentioned structure, and extends through the window of the ground electrode by the extension or the bent shape of the strip line conductor constituting each resonator. Coupling with the capacitance between opposing stripline conductors,
Alternatively extending portion and another strip of the strip line conductors
Steep characteristics can be obtained by coupling with the capacitance between the terminal electrode of the pipeline conductor and the terminal electrode. Three layers of strip la
When the in- conductor is provided, two resonators formed between the intermediate terminal electrode and one terminal electrode, and two resonators formed between the intermediate terminal electrode and the other terminal electrode are provided. The duplexer is constructed by changing the center frequency of the vessel.

[0008]

1A is a perspective view showing one embodiment of a dielectric resonator according to the present invention, and FIGS. 1B, 1C and 1D are EE and FF of FIG. 1A, respectively. , GG sectional view, and (D) is an equivalent circuit diagram thereof. In FIG. 1, reference numeral 1 denotes a dielectric made of ceramic, 2A and 2B denote strip line conductors serving as transmission lines embedded in the dielectric 1, and 3 denotes a ground electrode embedded between the strip line conductors 2A and 2B. is there. these
The strip line conductors 2A and 2B and the ground electrode 3 are made of copper, silver, silver-palladium, or the like, and are formed by laminating with the dielectric 1 by a printing method or a sheet method and firing.

The strip line conductors 2A and 2B are
In the case of intermediate products, rectangular dielectrics (laminated
The body 1 is exposed at one end surface, which is the outer surface, and hot terminal electrodes 4A and 4B are attached to the exposed portions by baking or electroplating to be connected thereto. These hot terminal electrodes 4A, 4A
B is applied so as to cover the upper and lower edges of the end face of the laminate.
Also, the hot terminal electrodes 4A, 4B on the outer surface of the dielectric 1
The ground electrode 5 is attached to portions other than the attachment portion by baking or plating, and the other ends of the stripline conductors 2A and 2B and the ground electrode 3 are connected to the ground electrode 5.

Each of the stripline conductors 2A and 2B is provided with an extension 2x, 2y extending to a position opposite to each other in the dielectric 1, and both extension 2
The portion of the ground electrode 3 located between x and 2y is removed and the window 3 is removed.
x is provided so that the extending portions 2x and 2y face each other via the dielectric layer.

[0011] Inductance L ₁ shown in the dielectric resonator, a stripline conductor <br/> body 2A, 2B in FIG. 1 (E),
Forming a L ₂ component. Also, the strip line conductor 2A
, Ground electrodes 3 and 5 and the dielectric 1 therebetween form a capacitance C ₁ component, and these constitute a resonator 6. In addition, vinegar
Trip line conductors 2B and the ground electrode 3 and 5 form between them dielectric 1 by volume C ₂ components, these by, a resonator 7. Also, these resonators 6 and 7, the extending portion 2x, coupled by the capacitance C _x between 2y, thereby those steep characteristics.

FIGS. 2 (a) to 2 (g) are diagrams for explaining a combination of sheets as a material when the resonator is manufactured by the sheet method, wherein 1a to 1g denote ceramic powder. 2 shows dielectric sheets formed into a sheet shape by kneading with a resin binder, and 2A, 2B, and 3 indicate the strips laminated on these sheets, respectively.
These strips are line conductors and ground electrodes
Line conductors 2A, 2B and the ground electrode 3, stripline
A conductor film is formed on a dielectric sheet. These are stacked and pressed, fired, and then the terminal electrodes 4A,
4B and the ground electrode 5 are baked or electroplated to obtain a product. This resonator can be manufactured not only by a sheet method but also by a printing method.

Next, an example in which the present invention is applied to a duplexer will be described. The duplexer of the present embodiment is realized by realizing two different center frequencies in a transmitting and receiving circuit of a transmitting and receiving circuit of the above-mentioned mobile phone or the like on one chip by a single chip.
Is a perspective view, and FIGS. (B) and (C) are H-
H and II are cross-sectional views, and (D) is an equivalent circuit diagram thereof.
FIG. 4 shows sheets (a) to (k) in the case where this resonator is realized by the sheet method, starting from the sheet serving as a constituent material above each layer in FIG.

In FIG. 4, reference numerals 1a to 1j denote dielectric sheets, 2C to 2E denote strip line conductors serving as transmission lines, and 3A and 3B denote strip line conductors 2C and 2D and 2D and 2E, respectively. And a strip electrode 2C, 2D, 2E
Respectively realize the center frequencies f ₀₁ , f ₀₁ and f ₀₂ , f ₀₂ . The strip line conductor 2C is connected at one end a to the terminal electrode 4C shown in FIG. 3A, and at the other end b to the ground electrode 5 on the outer surface. Strip rye
The conductor 2D is connected to the terminal electrode 4D of FIG.
And the other end d, e is connected to the ground electrode 5 on the outer surface. The strip line conductor 2E is connected at one end f to the terminal electrode 4E of FIG. 3A and at the other end g to the ground electrode 5 on the outer surface. One ends h and i of the ground electrodes 3A and 3B are connected to the ground electrode 5, respectively. Story
A part of the upline conductor 2C and the stripline conductor 2D
Is a part of the strip line conductor 2D.
By bending the inner conductor 2C side, both strip lines
The pair of in-conductors 2C and 2D are connected through the window 3x of the ground electrode 3A.
Constituting a capacitive component C _x for coupling between resonators by countercurrent.
Also, a part of the strip line conductor 2D is
By bending to the in-conductor 2E side, the strip line
Opposing a part of the conductor 2E through the window 3y of the ground electrode 3B.
And thus the capacitance component coupling between the resonators
To configure the C _y.

[0015] In this embodiment, constitutes a stripline conductor <br/> body 2C, 2D, 2E is an inductance component L _1, L _2, L _3, respectively, in FIG 3 (D), these strips
Line conductors 2C, 2D, 2E and ground electrodes 5, 3A, 3
Constituting a capacitive component C ₁ -C ₃ in which opposed to these stripline conductors of B. A resonator 8 composed of an inductance component L ₁ and a capacitance component C ₁ and a resonator 9 composed of an inductance component L ₂ and a capacitance component C ₂ are:
Coupled by the capacitance C _x of the through windows 3x with terminal electrodes 4C and 4D center frequency to a resonator of f _01. Also, the resonator 10 consisting of inductance component L ₃ and the capacitance component C ₃ Prefecture is coupled to the center frequency by the capacitance C _y through the window 3y between the terminal electrode 4D and 4E constitutes a resonator f ₀₂ . That is, resonators having different center frequencies f ₀₁ and f ₀₂ are realized between the terminal electrodes 4C and 4D and 4D and 4E, respectively, and a duplexer having steep characteristics is formed by one chip.

FIG. 5 shows another embodiment of the present invention.
FIG. 6B is a perspective view, FIG. 6B is a cross-sectional view taken along the line JJ, and FIG. 6 is a diagram showing a sheet for realizing this resonator by the sheet method, which is shown in FIG. )
（(K).

The configuration of a duplexer a diagram of the third embodiment, as is different from the FIG. 4, the ground electrode 3A, without providing the window to 3B, the extended portion 2v stripline conductors 2C, the 2E,
Each extending portion 2v provided 2w, by facing the 2w to the terminal electrode 4D, in that the formation of the coupling capacitance C _x, C _y between the resonators. Such a terminal electrode 4D and a stripler
The structure opposed to the in- conductor 2C or 2E can be applied to a structure used as a resonator having one center frequency as in the embodiment of FIGS.

[0018]

According to the first aspect of the present invention, a plurality of resonators are formed in a single chip by a laminated structure, and these resonators are connected to each other via an extension provided on at least one of the stripline conductors. Because it is connected by the opposite part through the window which is the removed part of the ground electrode inside the dielectric,
It is possible to obtain a compact device having a sharp resonance characteristic. Further, a plurality of resonators in one chip are coupled.
Mounting terminal with terminal electrodes formed side by side
A simple structure can be realized.

According to the second and third aspects , the same effects as those of the first aspect can be obtained.

According to the fourth aspect , a duplexer is constituted by one chip by providing at least three layers of conductors serving as transmission lines, laminating the conductors serving as the transmission line, the ground electrode, and the dielectric and firing them integrally. Thus, the space for mounting the resonator can be reduced. In addition, a duplexer having high mechanical strength and improved reliability can be provided by being formed by lamination and integral firing.

[Brief description of the drawings]

FIG. 1A is a perspective view showing one embodiment of a dielectric resonator according to the present invention, and FIGS. 1B, 1C, and 1D are EE, FF, and G of FIG. 1A, respectively. FIG. 3G is a sectional view, and FIG. 3E is an equivalent circuit diagram of the present embodiment.

FIG. 2 is a perspective view showing a configuration of a material sheet when the resonator of the present embodiment is realized by a sheet method.

3 (A) is a perspective view showing another embodiment of the dielectric resonator according to the present invention, and FIGS. 3 (B) and 3 (C) each show H of (A).
-H, II sectional drawing, (D) is an equivalent circuit diagram of the present embodiment.

FIG. 4 is a perspective view showing a configuration of a material sheet when the resonator of the embodiment in FIG. 3 is realized by a sheet method.

5A is a perspective view showing another embodiment of the dielectric resonator according to the present invention, and FIG. 5B is a cross-sectional view taken along the line JJ of FIG. 5A.

FIG. 6 is a perspective view showing a configuration of a material sheet when the resonator of the embodiment of FIG. 5 is realized by a sheet method.

[Explanation of symbols]

First dielectric 1a~1k dielectric sheet 2A~2E stripline conductors 3, 3A, 6 to 10 the resonator 3B ground electrode 4A~4E terminal electrodes 5 grounding electrode L ₁ ~L ₃ inductance component C ₁ -C ₃ capacitive component C _x , C _y Resonator coupling capacitance component

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01P 1/20-1/219 H01P 7/00-7/10

Claims (4)

(57) [Scope of request for utility model registration] 1. A dielectric, a stripline conductor, and a ground electrode.
By laminating the door becomes a laminated body obtained by sintering, buried with burying the inside to the stripline conductors of two or more layers of a transmission line by a laminated structure of the laminate, a ground electrode between the stripline conductors of each layer Then, each end of the strip line conductor of each layer is coated on the outer surface of the laminate.
Connected to the ground electrode attached to the strip line conductor of each layer
And the upper and lower edges of the end face of the laminate, respectively.
And cover them at a horizontal distance from each other.
Were respectively connected to the terminal electrodes constitute a plurality of resonators in a single chip to form a part is removed the window of the ground electrode buried in said laminate, a strip line adjacent to the stacking direction
Conductors are separated from adjacent stripline conductors
Through the window in the extension provided on at least one
A dielectric resonator, wherein the resonators are coupled to each other by a capacitance of the opposed portion. 2. A strip line conductor according to claim 1, wherein said strip line conductors are adjacent to each other in said laminating direction.
To be opposed by the extension provided on at least one of them.
Instead, use less of adjacent stripline conductors.
One is formed into a curved shape and the other is
And the resonators are coupled by the capacitance of the facing portion.
A dielectric resonator characterized in that: 3. The strip line conductor according to claim 1, wherein said strip line conductors are adjacent to each other in said laminating direction.
To be opposed by the extension provided on at least one of them.
Instead, adjacent stripline conductors
Facing the connected terminal electrode, and the capacitance of the facing portion
Wherein the resonators are coupled by a component.
Electric body resonator. 4. In any one of claims 1 to 3,
Providing three or more layers of stripline conductors as transmission lines
A duplexer is formed in one chip.
Dielectric resonator.