JP2000068717A - Dielectric oscillation parts, dielectric filter, antenna multicoupler, composite filter and communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost and to improve reliability by reducing the terminal bending of a connecting terminal. SOLUTION: The connecting terminal 9 is obtained by punching and molding a metallic plate with spring property and consists of a cylinder part 91 of a cross sectional surface in the shape of a split rink and a flat external connecting part 92 projecting from one end of the part 91, and a curved part 92a in the shape of a circular arc is formed at the connecting part of the part 92 and the part 91. The terminal 9 has the part 91 inserted to a resonator hole 33 from the side of the opening end face of a dielectric coaxial resonator 31 and is contact-connected to an inner conductor by its spring property.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric resonance component, a dielectric filter, an antenna duplexer, a composite filter, and a communication device used in, for example, a microwave band.

[0002]

2. Description of the Related Art Conventionally, when a filter or the like is formed using a dielectric coaxial resonator, a metal connection terminal 42 is inserted into a resonator hole of a dielectric coaxial resonator 41 as shown in FIG. A dielectric resonance component is used.

In the dielectric coaxial resonator 41, a resonator hole is formed through a pair of opposing end surfaces of a substantially rectangular parallelepiped dielectric, and an inner conductor is formed on an inner peripheral surface of the resonator hole. Outer conductors are formed on the other five surfaces except one opening surface (hereinafter, referred to as an open end surface) of the resonator hole.

The connection terminal 42 is formed of a metal conductor plate having a spring property. As shown in FIG. 9, a cylindrical portion 42a and a flat external connection portion 42b protruding from one end of the cylindrical portion 42a are integrally formed. Is formed. The cylindrical portion 42a has an outer diameter larger than the inner diameter of the resonator hole before insertion of the resonator hole. The connection terminal 42 has a cylindrical portion 42a inserted into the resonator hole from the open end face side of the dielectric coaxial resonator, and is connected and fixed to the inner conductor by its spring property. The external connection portion 42b is connected to electrodes such as a coupling element constituting a filter circuit by soldering or the like.

[0005]

However, in the above-described conventional dielectric resonator component, the connection terminal inserted into the resonator hole of the dielectric coaxial resonator has an external connection portion formed in a flat plate shape over the entire length. When the connection terminal is inserted or the filter is assembled, the external connection portion is easily bent at the base where the external connection portion is connected to the cylindrical portion. As shown in FIG. In addition, there are problems such as the occurrence of poor soldering, or the floating of the dielectric coaxial resonator as shown in FIG. Further, it is necessary to correct the bending of the terminal and to correct the defective soldering, etc., which causes a problem that the production efficiency is reduced and the production cost is increased. This is because when an external force is applied to the external connection portion, the stress concentrates on the root of the external connection portion.

It is possible to increase the terminal strength of the external connection portion by increasing the thickness of the terminal or increasing the width of the external connection portion, but if the thickness is increased, it becomes difficult to curl the cylindrical portion. Alternatively, the spring property becomes excessive, making it difficult to insert into the dielectric coaxial resonator. If the width is increased, there is a problem that it protrudes from an electrode such as a coupling element.

Accordingly, an object of the present invention is to improve the bending strength of the connection terminal without changing the thickness and the width, thereby greatly reducing the terminal bending of the connection terminal, and at low cost and reliability. The present invention is to provide a dielectric resonance component, a dielectric filter, an antenna duplexer, a composite filter, and a communication device with high reliability.

[0008]

In order to achieve the above object, a dielectric resonator component according to the present invention has a resonator hole formed in a dielectric, and an inner conductor is formed on an inner peripheral surface of the resonator hole. A dielectric coaxial resonator having an outer conductor formed on the outer surface of the body, a split ring-shaped cylindrical portion inserted into the resonator hole and connected to the inner conductor, and a resonator formed continuously at one end of the cylindrical portion. A connection terminal comprising a flat external connection portion protruding from an opening surface of the hole, and a curved portion provided in a portion of the external connection portion connected to the cylindrical portion.

[0009] A dielectric filter, an antenna duplexer, and a composite filter according to the present invention are characterized by including at least one dielectric resonance component.

A communication device according to the present invention includes any one of the dielectric resonance component, the dielectric filter, the antenna duplexer, and the composite filter.

According to the above configuration, the connecting terminal connected to the inner conductor of the dielectric coaxial resonator is provided with a curved portion at a portion connected to the cylindrical portion of the external connection portion. Even when an external force is applied, the stress is dispersed at the curved portion and the concentration of the bending stress is eliminated at a portion connected to the cylindrical portion, so that the bending strength of the external connection portion can be greatly improved. Therefore, in the dielectric resonance component of the present invention, it is possible to significantly reduce connection failure with the outside due to terminal bending, and to reduce manufacturing cost.

Further, the dielectric filter, the antenna duplexer and the composite filter according to the present invention are provided with the dielectric resonance component having the above-mentioned features, so that they are inexpensive and highly reliable.

Since the communication device according to the present invention is provided with any one of the dielectric resonance component, the dielectric filter, the antenna duplexer and the composite filter having the above characteristics, it is inexpensive and highly reliable. Becomes

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a dielectric resonance component according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an exploded perspective view of the dielectric resonance component, FIG. 2 is an enlarged perspective view of a main part of the connection terminal, FIG. 3A is a plan view of the connection terminal, and FIG. ) XX sectional view, FIG.
(C) is a sectional view taken along line YY in (a) of FIG.

The dielectric resonance component of this embodiment is configured by connecting a metal connection terminal 9 to a dielectric coaxial resonator 31.

In the dielectric coaxial resonator 31, one resonator hole 33 is formed through a pair of opposing end faces of a substantially rectangular parallelepiped dielectric 32, and an inner peripheral surface of the resonator hole 33 is formed inside. A conductor 34 is formed, and outer conductors 35 are formed on the other five surfaces of the resonator hole 33 except for one opening surface (the front surface side in FIG. 1).

The connection terminal 9 is formed by punching a metal conductor plate made of phosphor bronze or the like having a spring property, and is formed of a cylindrical portion 91 having a split ring-shaped cross section and a flat plate shape protruding from one end of the cylindrical portion 91. The external connection portion 92 is connected to the cylindrical portion 91 at a predetermined length A
A curved portion 92a is formed over the area. This curved part 9
2a is formed by curling similarly to the cylindrical portion 91, and is formed to be curved in an arc shape substantially concentric with the cylindrical portion 91.

The outer diameter of the cylindrical portion 91 in the vicinity of the curved portion 92a is larger than the inner diameter of the resonator hole 33, and the outer diameter of the tip portion is gradually increased so as to be easily inserted into the resonator hole. It is formed so as to be smaller. In this embodiment,
The thickness of the metal conductor plate is 0.1 mm, and the curved portion 9 of the cylindrical portion 91 is provided.
The outer diameter in the vicinity of 2a is 1.15 mm, the width of the external connection portion 92 is 0.5 mm, and the length A of the curved portion 92a is about 0.4 mm.
Is formed.

The connection terminal 9 has a cylindrical portion 91 inserted into the resonator hole 33 from the open end face side of the dielectric coaxial resonator 31.
It is connected to the inner conductor 34 by its spring property. The external connection portion 91 is connected to electrodes such as a coupling element constituting a filter circuit by soldering or the like. The dielectric resonance component is used by being mounted on a base substrate such as a ceramic or resin insulating substrate or a metal case plate together with a coupling element such as a capacitor or an inductor, and constitutes a filter or the like.

In the configuration of the present embodiment, the connecting terminal 9 connected to the inner conductor 34 of the dielectric coaxial resonator 31 is connected to the cylindrical portion 91 of the external connecting portion 92 by a circular arc having a predetermined dimension. Even when an external force is applied to the external connection portion 92, the stress is dispersed and relaxed by the curved portion 92a, and the concentration of the bending stress at the portion connected to the cylindrical portion 91 is eliminated. The bending strength of the connection portion 92 is greatly improved. Therefore, in the dielectric resonance component of the present embodiment, occurrence of terminal bending in handling is greatly reduced, poor connection with the outside due to terminal bending is significantly reduced, the yield rate is improved, and the terminal bending is improved. Work such as rework is not required, and the manufacturing cost is reduced.

The curved shape of the curved portion 92a is not limited to the above embodiment, but may be a curved surface such as an elliptical arc. The length A of the curved portion 92a is determined by the connection terminal 9.
An appropriate dimension is selected according to the overall dimension, thickness, and the like. In order to obtain the above effect, the length A of the curved portion 92a is set to 10% or more of the entire length of the external connection portion 92 or 50% or more of the width of the external connection portion 92.

Next, the configuration of an antenna duplexer according to a second embodiment of the present invention will be described with reference to FIGS. FIG.
Is an exploded perspective view of the antenna duplexer, FIG. 5 is a perspective view showing a state where various components are mounted, and FIG. 6 is an equivalent circuit diagram.

The antenna duplexer of the present embodiment is configured by mounting a plurality of the dielectric resonance components of the first embodiment on a single substrate to form an antenna duplexer.
A band elimination filter having four quarter-wavelength dielectric coaxial resonators 1 to 3, and a receiving filter is formed of a bandpass filter having four quarter-wavelength dielectric coaxial resonators 4 to 7. ing. Dielectric coaxial resonators 1-7
The connection terminal 9 has the same structure as that described in the first embodiment.

In the resonator holes of the dielectric coaxial resonators 1 to 7, cylindrical portions 91 of the connection terminals 9 are respectively provided.
7 is press-fitted from the open end side of the inner conductor 3 in the resonator hole.
4 and the continuity is obtained. A tongue-shaped external connection portion 92 at the other end of the connection terminal 9 is connected to a capacitor substrate 10 to be described later.
12 and the electrodes 14 to 17 on the upper surface of the coupling substrate 13 are respectively connected by soldering or the like.

The capacitor substrates 10 to 12 are made of a dielectric material, and electrodes are formed on upper and lower surfaces thereof to form capacitors. A plurality of electrodes 14 to 17 are provided in parallel on the upper surface of the coupling substrate 13 made of a dielectric, and further, electrodes are formed on both sides of the lower surface of the coupling substrate 13.

Coiled inductors L1 to L3 are connected between the capacitor substrates 10 to 12. Coupling board 18 made of a dielectric for mounting inductances L1 to L3
The electrodes 19 and 20 are formed on the upper surface of the substrate, and a ground electrode is formed on the entire lower surface of the coupling substrate 18.

An antenna terminal AN connected to the antenna side is provided on the upper and lower surfaces of the base substrate 22 on which the above members are mounted.
T, a transmitting terminal Tx to which the transmitting unit is connected, a receiving terminal Rx to which the receiving unit is connected, and terminals ANT, Tx, R
A ground electrode 26 is formed on substantially the entire surface except for x. The upper and lower surfaces of the terminals ANT, Tx, and Rx are electrically connected to each other via an electrode film formed on an end surface. Also, the ground electrode 2
The upper and lower surfaces 6 are also electrically connected via a plurality of through holes 28 and electrode films formed on the end surfaces. The base substrate 22 is formed of a dielectric or an insulator.

The three spacers 21 are conductive members made of metal or the like, and are used to adjust the height of the connection terminal 9 for connection with the external connection portion 92.

Next, the arrangement of each member will be described. One spacer 21 is connected to the transmission terminal T of the base substrate 22.
x, and the coupling board 18 is connected to the transmission terminal Tx
And soldered on the ground electrode 26 between the antenna terminal ANT.

Further, the antenna terminal ANT and the receiving terminal R
Spacers 21 are respectively mounted on x, and the electrodes on the lower surfaces are in contact with the upper surfaces of the two spacers 21 to bridge and solder the bonding substrate 13.

One end of the inductor L1 is mounted on the upper surface of the spacer 21, and the capacitor substrate 10 is mounted on the upper surface of the spacer 21. The other end of the inductor L1 is mounted on the electrode 19 of the coupling board 18. Inductor L
2 is mounted between electrodes 19 and 20 and inductor L1
The capacitor substrate 11 is mounted on the connection between L1 and L2. One end of the inductor L3 is mounted on the electrode 20 of the coupling substrate 18, the other end is mounted on the antenna terminal ANT, and the capacitor substrate 12 is mounted on the connection between the inductors L2 and L3.

The external connection portion 9 of the connection terminal 9 from the dielectric resonator is connected to the electrodes on the upper surfaces of the capacitor substrates 10 to 12.
2 is a bonding substrate 1 mounted on two spacers 21
3, dielectric coaxial resonators 4 to 7
The external connection portions 92 of the connection terminals 9 are connected by soldering. Usually, a metal cover is attached to the base substrate 22 by soldering or the like so as to cover the above members.

FIG. 6 shows an equivalent circuit of the antenna duplexer, wherein the capacitors C1 to C3 are
And the capacitor C4 is connected to the transmission terminal 1
4 and the ground electrode on the lower surface.
The capacitors C5 and C6 are connected to the electrodes 19 on the upper surface of the coupling substrate 18,
The capacitor C7 is formed between the antenna terminal ANT and the ground electrode on the lower surface.

The capacitor C8 is formed between the electrode 14 of the coupling substrate 13 and the electrode on the lower surface.
Reference numerals 9 to C10 are formed between the electrodes 14 to 16 of the coupling substrate 13. Capacitor C11 is coupled substrate 1
3 The upper surface electrode 16 and the lower surface electrode are formed, and the lower surface electrode is electrically connected to the spacer 21. Capacitor C12
Is formed by the electrode 17 on the upper surface of the coupling substrate 13 and the electrode on the lower surface. Note that the dielectric resonator 7 and the capacitor C
12 constitute a trap circuit of a series resonance circuit.

The antenna duplexer of this embodiment has a configuration using the dielectric resonance component of the first embodiment, that is, a connection terminal for connecting the dielectric resonator and an electrode such as a coupling element has a cylindrical external connection portion. A curved portion is provided at the base of the connector, and when mounting the connection terminal to the dielectric resonator or assembling the duplexer, the occurrence of terminal bending of the external connection portion is greatly reduced, and the terminal bending is reduced. Is significantly reduced. Therefore, a stable and reliable connection is obtained, the manufacturing cost is reduced, and the device is inexpensive and highly reliable.

In the second embodiment, all the dielectric coaxial resonators are connected to the connection terminals provided with the curved portions. However, the present invention is not limited to this. And a device for connecting a dielectric coaxial resonator and a coupling circuit using another connection means may be used in combination.

Further, in the second embodiment, an antenna duplexer in which a band elimination filter and a bandpass filter are combined has been described as an example. However, a dielectric filter or a dielectric coaxial resonator having such a single structure is used. The present invention can be applied to other individual trap circuits, high-pass filters, low-pass filters, VCOs, and other individual components, or composite filters combining the filters. Further, the number of stages of the resonator is not limited.

Next, FIG. 7 shows the configuration of a communication device according to a third embodiment of the present invention. In FIG. 7, 122 is an antenna, 123 is an antenna duplexer, 124 is a transmission filter,
Reference numeral 125 denotes a reception filter, 126 denotes a transmission circuit, and 127 denotes a reception circuit. Antenna terminal A of antenna duplexer 123
NT is the antenna 122, the transmission terminal Tx is the transmission circuit 12
6, the receiving terminals Rx are connected to the receiving circuit 127, respectively, to constitute a communication device.

Here, as the antenna duplexer 123, the antenna duplexer described in the second embodiment can be used. Further, as the transmission filter 124 or the reception filter 125, a dielectric filter having a single configuration constituted by using the dielectric resonance component shown in the first embodiment can be used. By using the dielectric resonance component, the dielectric filter, the antenna duplexer, or the composite filter according to the present invention, an inexpensive and highly reliable communication device can be obtained.

[0040]

As described above, the dielectric resonance component according to the present invention has a structure in which the connection terminal connected to the inner conductor of the dielectric coaxial resonator has a predetermined portion connected to the cylindrical portion of the external connection portion. Even if external force is applied to the external connection part, the stress is dispersed by this curved part and the concentration of bending stress at the connection part with the cylindrical part disappears, so the bending of the external connection part Strength can be greatly improved. Therefore, in the dielectric resonance component of the present invention, the occurrence of terminal bending of the external connection portion is greatly reduced when the connection terminal is attached or connected to an external circuit, and the connection failure due to the terminal bending is significantly reduced. Can be reduced.

Further, by using the above-mentioned dielectric resonance component according to the present invention, a stable and reliable connection can be obtained and the production cost can be reduced. Obtainable.

Further, by using the dielectric resonance component, the dielectric filter, the antenna duplexer or the composite filter according to the present invention, it is possible to obtain an inexpensive and highly reliable communication device.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a dielectric resonance component according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of the connection terminal according to the first embodiment of the present invention.

3A is a plan view of a connection terminal according to the first embodiment of the present invention, FIG. 3B is a cross-sectional view taken along line XX of FIG. 3A, and FIG. 3C is a line YY of FIG. It is sectional drawing.

FIG. 4 is an exploded perspective view of an antenna duplexer according to a second embodiment of the present invention.

FIG. 5 is a perspective view of an antenna duplexer according to a second embodiment of the present invention.

FIG. 6 is an equivalent circuit diagram of an antenna duplexer according to a second embodiment of the present invention.

FIG. 7 is a block diagram of a communication device according to a third embodiment of the present invention.

FIG. 8 is a perspective view of a conventional dielectric resonance component.

FIG. 9 is a perspective view of a conventional connection terminal.

FIGS. 10A and 10B show an example of a mounting state of a conventional dielectric resonance component, and are side views when a connection terminal is bent at a root.

[Explanation of symbols]

 1 to 7, 31 dielectric coaxial resonator 9 connection terminal 91 cylindrical portion 92 external connection portion 92a curved portion 10 to 12 capacitor substrate 13, 18 coupling substrate 22 base substrate Tx transmission terminal Rx reception terminal ANT antenna terminal 123 antenna duplexer 124 Transmit filter 125 Receive filter

Claims (5)

[Claims] 1. A dielectric coaxial resonator in which a resonator hole is formed in a dielectric, an inner conductor is formed on an inner peripheral surface of the resonator hole, and an outer conductor is formed on an outer surface of the dielectric. A split ring-shaped cylindrical portion connected to the inner conductor, and a connection terminal formed of a flat external connection portion formed continuously with one end of the cylindrical portion and protruding from the opening surface of the resonator hole, A dielectric resonance component, wherein a curved portion is provided in a portion of the external connection portion connected to the cylindrical portion. 2. A dielectric filter comprising at least one dielectric resonance component according to claim 1. 3. An antenna duplexer comprising at least one dielectric resonator component according to claim 1. 4. A composite filter comprising at least one dielectric resonance component according to claim 1. 5. The dielectric resonance component according to claim 1, at least one of the dielectric filter according to claim 2, the antenna duplexer according to claim 3, or the composite filter according to claim 4. A communication device, comprising: