JPH1141012A - Insertion terminal for coaxial resonator, coaxial resonator, and dielectric filter - Google Patents

Abstract

[PROBLEMS] To provide an insertion terminal for a coaxial resonator which is easy to assemble, a coaxial resonator using the insertion terminal, and a small-sized dielectric filter. SOLUTION: An insertion portion 2 forming a press-fit portion electrically and mechanically connected to an inner conductor of a coaxial resonator, an external connection portion 3 electrically connected to the outside of the coaxial resonator, and insertion. The insertion part 2 is a coaxial resonator insertion terminal formed of a plurality of curved plate-like bodies having elasticity. The base part 5 integrates the part 2 and the external connection part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric filter, and more particularly to a coaxial resonator suitable for a dielectric filter and an insertion terminal for the coaxial resonator.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to the drawings. FIG. 4 is an external perspective view of a conventional coaxial resonator insertion terminal and a conventional coaxial resonator, and FIG. 5 is an external perspective view of a conventional dielectric filter using the insertion terminal.

In the conventional coaxial resonator, as shown in FIG. 4, an insertion terminal 18 is inserted into the inner conductor 17 of the coaxial resonator 15 by moving the insertion terminal 18 in the direction of arrow 30 to establish electrical connection. Was. The insertion terminal 18 includes a spatula-shaped external connection portion 14,
It is constituted by a cylindrical insertion portion 13 having a slit having substantially the same shape as the inner conductor.

In a conventional dielectric filter, as shown in FIG. 5, a coaxial resonator 15 having an insertion terminal 18 attached to an inner conductor 17 is mounted side by side on a mounting board 19, and an external connection of the insertion terminal 18 is made. The portion 14 is bent and brought into contact with the pattern 20 of the mounting board 19, and is further electrically connected using solder or the like. A chip capacitor 22 is mounted on the mounting board 19 as a circuit element, and an input / output terminal 21 is provided.

The open end side of the coaxial resonator 15 (not shown)
Although the insertion terminal 18 is inserted from above, it may be difficult to insert the insertion terminal 18 due to variations in the shape and dimensions of the insertion portion 13 of the insertion terminal 18 and variations in the shape and dimensions of the inner conductor 17 of the coaxial resonator. Further, the external connection portion 14 of the insertion terminal 18 is bent and mounted on the pattern of the substrate on which the coaxial resonator is mounted using solder.
Depending on the degree of folding, it could not be mounted.

[0006]

The conventional insertion terminal has a drawback that the insertion portion is almost the same shape as the inner conductor, so that it is difficult to insert the insertion terminal due to variations in the size and shape of the inner conductor, that is, it is difficult to assemble. In addition, even if it is desired to use a capacitor array as a circuit element in order to reduce the size of the dielectric filter, the external connection portion is mechanically weak to float the capacitor array and make electrical connection. It could not be used.

Accordingly, an object of the present invention is to provide an insertion terminal in which an insertion portion can be smoothly inserted into an inner conductor of a coaxial resonator and a capacitor array can be easily soldered. That is, an object of the present invention is to provide an insertion terminal for a coaxial resonator which is easy to assemble, a coaxial resonator using the insertion terminal, and a small-sized dielectric filter.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an insertion part which is electrically and mechanically connected to an inner conductor of a coaxial resonator by press-fitting; An external connection portion electrically connected to the outside of the device, a base portion integrating the insertion portion and the external connection portion, and the insertion portion is an insertion terminal for a coaxial resonator formed of a plurality of curved plate-like bodies having elasticity. It is.

Further, the present invention provides an insertion part electrically and mechanically connected to the inner conductor of the coaxial resonator by press-fitting, an external connection part electrically connected to the outside of the coaxial resonator, and The insertion portion is a base for integrating the external connection portion and the external connection portion, and the insertion portion is a flat annular coaxial resonator insertion terminal having elasticity.

Further, the present invention is the above-described coaxial-resonator insertion terminal, wherein the coaxial-resonator insertion terminal is provided with a plane for mounting a circuit element at an external connection portion of the insertion terminal.

Further, the present invention is the above-described insertion terminal for a coaxial resonator, wherein the insertion portion and the external connection portion are arranged at different positions in the longitudinal direction of the base portion. .

Further, according to the present invention, in the above-mentioned insertion terminal for a coaxial resonator, the distance between the center of the insertion part and the base of the external connection part in the longitudinal direction is one of the thickness of the circuit element to be mounted. / 2 is the above-mentioned insertion terminal for a coaxial resonator substantially equal to / 2.

Further, the present invention provides a coaxial resonator using the above-mentioned insertion terminal for a coaxial resonator.

Further, the present invention is a dielectric filter using the above-mentioned coaxial resonator.

Further, the present invention is a dielectric filter characterized by using the above coaxial resonator and a capacitor array together.

Further, the present invention is a dielectric filter characterized in that a plurality of the above-described coaxial resonators are arranged, and a capacitor array is mounted so as to be sandwiched above and below an external connection portion.

According to the present invention, the insertion terminal is smoothly inserted into the inner conductor of the coaxial resonator to make an electrical connection, and a plurality of the coaxial resonators having the insertion terminals are arranged. The capacitor array can be easily mounted on the filter.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, an insertion terminal 1 for a coaxial resonator according to the present invention comprises: an insertion portion 2 that is electrically and mechanically connected to an inner conductor of the coaxial resonator by press-fitting; An external connection portion 3 electrically connected to the outside of the container, and an insertion portion 2
And a base part 5 integrating the external connection part 3 with the insertion part 2
Is composed of a plurality of curved plate-like bodies having elasticity.

Further, as shown in FIG. 2, the coaxial resonator insertion terminal 4 of the present invention is coaxial with an insertion portion 6 which is electrically and mechanically connected to the inner conductor of the coaxial resonator by press-fitting. An external connection portion 3 electrically connected to the outside of the type resonator, and a base portion 5 integrating the insertion portion and the external connection portion,
The insertion portion 6 has elasticity and a flat annular shape.

The above-described insertion terminals 1 and 4 for coaxial resonators
The external connection portion 3 has a flat surface 7 for mounting circuit elements.
Is provided.

Further, the insertion portions 2 and 6 and the external connection portion 3 are mounted at different positions on the base portion 5 in the longitudinal direction, and the interval between them is almost equal to 1/2 of the thickness of the circuit element. I have.

Then, a coaxial resonator to which a plurality of insertion terminals are attached is obtained by using the plurality of insertion terminals for coaxial resonator.

Next, as shown in FIG. 3, about half of the coaxial resonators (external connection portions 31 of the insertion terminals) are replaced with other coaxial resonators (external connection portions 31). The dielectric filter of the present invention is obtained by mounting the capacitor array so as to be opposite to the external connection portion 32) of the insertion terminal and sandwiching the capacitor array above and below the external connection portion.

[0025]

EXAMPLE As shown in FIG. 1, a 0.4 mm-thick phosphor bronze plate was formed by wire cutting and subjected to solder plating to obtain an insertion terminal 1.

The insertion terminals 1 were mounted on the three coaxial resonators 15 and arranged on the mounting board 9. At this time, the middle one
The coaxial resonators were turned over so that the position of the external connection part 3 was reversed with respect to the coaxial resonators on both sides (FIG. 3).

Next, an insertion terminal 1 in which a capacitor array 23 as a circuit element is mounted on a central coaxial resonator is provided.
And the external connection part 32 of the insertion terminal 1 attached to the coaxial resonator on both sides is mounted so as to be vertically sandwiched therebetween, and further fixed to the mounting board 19 using the connection terminal 24, and Also connected.

The insertion terminal for a coaxial resonator obtained as described above was easy to assemble. A compact dielectric filter was obtained using the coaxial resonator and the capacitor array to which the insertion terminal according to the present invention was attached. The mounting area of the dielectric filter of this embodiment is about 90% as compared with the conventional one, and
It has become smaller.

Further, as shown in FIG. 2, an insert terminal 4 having a flat annular insert portion 6 (FIG. 2) was obtained by molding and plating using a polymer resin composition. At this time, the same effect as above was obtained.

[0030]

According to the present invention, an insertion terminal for a coaxial resonator which is easy to assemble, a coaxial resonator using the insertion terminal, and a small-sized dielectric filter can be obtained.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a (first) coaxial resonator insertion terminal.

FIG. 2 is an external perspective view of a (second) coaxial resonator insertion terminal according to the present invention.

FIG. 3 is an external perspective view of a dielectric filter using the insertion terminal of the present invention.

FIG. 4 is an external perspective view of a conventional coaxial resonator insertion terminal and a coaxial resonator.

FIG. 5 is an external perspective view of a dielectric filter using a conventional insertion terminal.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Insertion terminal (for the coaxial resonator of this invention) 2 Insertion part (of the plate-shaped body of the insertion terminal of this invention) 3,31,32 External connection part (of insertion terminal of this invention) 4 (Circular ring of this invention) Insert terminal 5 (for coaxial resonator with insert) 5 Base 6 (of insert terminal of the present invention) 6 Insert (flat annular of insert terminal of the present invention) 7 Plane (for mounting circuit element) 13 (conventional) Insertion part (of insertion terminal) 14 External connection part (of conventional insertion terminal) 15 Coaxial resonator 16 Outer conductor 17 Inner conductor 18 Insertion terminal (for conventional coaxial resonator) 19 Mounting substrate 20 Pattern of mounting substrate DESCRIPTION OF SYMBOLS 21 I / O terminal 22 Chip capacitor 23 Capacitor array 24 Connection terminal 30 Arrow

Claims (9)

[Claims] 1. An insertion part electrically and mechanically connected to an inner conductor of a coaxial resonator by press-fitting, an external connection part electrically connected to the outside of the coaxial resonator, and the insertion part. An insertion terminal for a coaxial resonator, comprising a base for integrating the external connection part, and the insertion part comprising a plurality of curved plate-like bodies having elasticity. 2. An external connection portion that is electrically and mechanically connected to the inner conductor of the coaxial resonator by press-fitting when the press-fitting is performed. An insertion terminal for a coaxial resonator, comprising a base for integrating a connection portion, wherein the insertion portion has elasticity and has a flat annular shape. 3. The coaxial resonator insertion terminal according to claim 1, wherein a plane for mounting a circuit element is provided at an external connection portion of the insertion terminal. The coaxial resonator insertion terminal as described. 4. The coaxial resonator insertion terminal according to claim 1, wherein the insertion portion and the external connection portion are arranged at different positions in the longitudinal direction of the base. Insertion terminal for coaxial resonator. 5. The insertion terminal for a coaxial resonator according to claim 4, wherein a distance between a central portion of said insertion portion and said base portion of said external connection portion in a longitudinal direction is 1 / th of a thickness of a circuit element to be mounted. 2. An insertion terminal for a coaxial resonator, which is substantially equal to 2. 6. A coaxial resonator using the coaxial resonator insertion terminal according to claim 1. Description: 7. A dielectric filter using the coaxial resonator according to claim 6. 8. A dielectric filter comprising the coaxial resonator according to claim 6 and a capacitor array. 9. A plurality of coaxial resonators according to claim 6 are arranged, and said capacitor array is mounted by being sandwiched above and below an external connection portion of the insertion terminal according to any one of claims 1 to 5. The dielectric filter according to claim 8, wherein