JPS61146008A - Resonator - Google Patents

Abstract

PURPOSE:To constitute the titled resonator so that it is scarcely subjected to an influence of the outside, also to shorten a coil conductor length, to simplify the structure by placing a resonance coil in the inside of an electric conductor case, packing it with a dielectric, and using one end of the coil as a terminal as it is. CONSTITUTION:A resonance coil 2 is placed in an electric conductor case 1, and packed with a dielectric 3. One end of the resonance coil 2 is connected to a bottom plate 6 of the electric conductor case 1 and becomes a ground terminal 5. The other end of the resonance coil 2 becomes an input/output terminal 4 as it is. The resonance coil 2 is resonated by its own inductance and the floating capacity, but the floating capacity becomes large by the dielectric 3, and when obtaining the same resonance frequency, the inductance can be reduced, a length of a conductor can be shortened, and an electric conductor loss can be reduced, comparing with that which has no dielectric.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a resonator used in an oscillator or a filter.

BACKGROUND OF THE INVENTION A conventional resonator will be described below with reference to the drawings. FIG. 11 is a side sectional view of a conventional resonator, 11o1
is a conductor case, 11o2 is a resonant coil made of a spirally wound conductor, 1103 is an open terminal, 1104 is a ground terminal, 1
106 is an input/output coil, 11o6 is an input/output terminal, 11o
7 is a hole for an input/output terminal.

The operation of the resonator configured as above will be explained below. Cylindrical or rectangular conductor case 11o
A resonant coil 1102 in which a conductive wire is spirally wound is installed inside the cavity of the conductor case 11, and the ground terminal 11o4 is connected to the conductor case 11.
o1, and the open terminal 1103 is left open. The resonant coil 1102 resonates with its own inductance and stray capacitance. Moreover, the resonant coil 11o2 is
It is magnetically coupled to the input/output coil hole 11o5 and coupled to an external circuit at the input/output terminal 1106 via the input/output terminal v1107. (For example, A, I, Zver#Iv, at al
:Rsaliyation ofa n1ter v
dth hslicol compamts, I
RE Trans.

on Components pant a, 7M
3. P9s 1961) Problems to be Solved by the Invention However, in the conventional structure, since the inside of the conductor case is hollow, the stray capacitance is small and the conductor length of the resonant coil becomes long, which increases the conductor loss and increases the Q. to degrade. Furthermore, the structure was complicated because input and output coils were required.

The present invention has a simple structure, is less susceptible to external influences, and has a high Q.
This provides a resonator with

Means for Solving the Problems and In order to solve the above problems, the resonator of the present invention has the following features:
One end of the resonant coil placed inside the conductor case is used as an input/output terminal, and the conductor case is filled with a dielectric material.

Effects The present invention has the above-described configuration in which the resonant coil is arranged inside the conductor case, making it less susceptible to external influences, and by using one end of the resonant coil as the input/output terminal of the resonator, the structure is simplified. By filling the conductor case with dielectric material, the stray capacitance increases, so when obtaining the same resonant frequency compared to the conventional structure, the conductor length of the resonant coil can be shortened, reducing conductor loss and achieving high Q resonance. This will lead to the realization of a vessel.

EXAMPLE Hereinafter, a resonator according to an example of the present invention will be described with reference to the drawings.

1 and 2 are a side sectional view and a top view of a resonator in an embodiment of the present invention. In Figures 1 and 2, 1 is a conductor case, 2 is a resonant coil, 3 is a filled dielectric, and 4 is a conductor case.
6 is an input/output terminal, 6 is a ground terminal, 6 is a bottom surface, and 7 is an open surface. In addition, Figure 1.

In FIG. 2, the resonant coil 2 is shown in a side view and a top view with parts other than the resonant coil 2 removed.

The conductor case 1 has a cylindrical shape and has an open surface 7 with one side open perpendicular to the central axis and a bottom surface 6 with the other side closed. Resonant coil 2 with a spirally wound conductor structure
has a grounding terminal 6 at one end of the conductor and an input/output terminal 4 at the other end, and the grounding terminal 6 is disposed inside the conductor case 1.
It is electrically connected to the bottom surface 6, and the input/output terminal 4 is taken out from the open surface 7 side and connected to an external circuit. Further, the inside of the conductor case 1 is filled with a dielectric material 3. The resonant coil 2 resonates with its own inductance and stray capacitance, but the stray capacitance increases due to the influence of the dielectric constant of the dielectric 3, so the resonant frequency decreases. That is, for the same resonant frequency, the length of the conducting wire is shortened to reduce the self-inductance of the resonant coil 2, thereby reducing conductor loss and increasing the Q of the resonator. Furthermore, since one end of the resonant coil 2 is used as the input/output terminal 4, the structure can be simplified. Furthermore, since the resonant coil 2 is arranged inside the conductor case 2 and the ground terminal 5 is directly electrically connected to the conductor case 2, the electromagnetic field distribution related to resonance is confined within the conductor case 2 and is influenced by external influences. hard to receive.

Next, a second embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is a side sectional view of a resonator in a second embodiment of the invention. In Fig. 3, 1, 2, 3°, 4.5, 6.
7 is the same as in FIGS. 1 and 2, and 8 is the side surface of the conductor case 1. Note that in FIG. 3, the resonant coil 2 is a side view with components other than the resonant coil 2 removed. The grounding terminal 5 of the resonant coil 2 is the same as in FIGS. 1 and 2 except that it is electrically connected to the boundary point between the side surface 8 and the bottom surface 6 of the conductor case 1 or in the vicinity thereof.

Connect the grounding terminal 6 to the bottom surface 6 of the side surface 8 of the conductor case 1 as described above.
Since the resonant coil 2 is not mechanically bonded to the bottom surface 6, the bottom surface 6 is molded separately from the side surface 8, and the resonant coil 2 is electrically connected to the boundary point or the vicinity thereof.
It becomes possible to attach the bottom surface 6 to the side surface 8 after attaching the side surface 8.

Next, a third embodiment of the present invention will be described with reference to the drawings.

FIG. 4 is a side sectional view of a resonator in a third embodiment of the invention. In Figure 4, 1.2,3°4.5,6,7
．． 8 is the same as in FIGS. 1, 2, and 3, 9 is a screw hole, and 1o is a screw. A screw hole 9t along the central axis is formed in the center of the dielectric 3 filled inside the resonant coil 2, and a metal screw 10 is inserted into the screw hole 9. screw 10
By moving the resonator up and down along the central axis, the electromagnetic field distribution inside the resonator can be changed, so the resonant frequency can be varied. Note that the screw 1o is not limited to metal,
Any material that can change the electromagnetic field distribution may be used, such as a dielectric material or a magnetic material.

Next, the embodiment of the present invention shown in FIG. 4 will be described with reference to the drawings.

6 and 6 are a side view and a perspective view of a resonator according to a fourth embodiment of the present invention, and FIG. 7 is a side view of a resonator of the present invention mounted on a circuit board having an external circuit. It is a diagram. 6, 6, and 7, 11 is a ground terminal, 12 is a circuit board, 13 is a ground pattern on the circuit board, 14 is a circuit pattern on the circuit board, 15 is a solder, and the others are No. This is similar to FIG. 1, FIG. 2, FIG. 3, and FIG. 4.

By providing the ground terminal 11 integrated with the conductor case 1 on the open side of the conductor case 1, the conductor case 1 of the resonator is electrically and mechanically connected to the ground of the external circuit via the ground terminal 11. Ru.

For example, as shown in FIG. 7, a resonator is inserted from the back side of a circuit board 12 having an external circuit, and a ground terminal 11 is electrically connected to a ground pattern 13 of the circuit board 12 with a solder 15. is electrically connected via the ground pattern 13 of the circuit board 12 and the ground terminal 11 by a simple mounting method, and the resonator is mechanically fixed to the circuit board 12.

Further, the input/output terminal 4 is electrically connected to the circuit pattern 14 by solder 16 and coupled to an external circuit.

Next, a sixth embodiment of the present invention will be described with reference to the drawings.

8 and 9 are a side view and a perspective view of a resonator according to a sixth embodiment of the present invention, and FIG. 10 is a side view when the resonator of the present invention is mounted on a circuit board having an external circuit. It is a diagram. In Figures 8, 9, and 10, 4 is an input/output terminal, 11' is a ground terminal, and the others are as shown in Figures 1, 2, and 10.
Figures 3 and 4.

This is similar to FIGS. 5, 6, and 7. ) body case 1
A ground terminal 11 integrated with the conductor case on the open side of the
' is provided so as to be taken out in a direction perpendicular to the central axis. A circuit board 1 having a resonator and an external circuit as shown in FIG.
By attaching the conductor case 1 so that its center axis is parallel to the circuit board 12 and electrically connecting the ground terminal 11' to the ground pattern 13 of the circuit board 12 with the solder 16, the conductor case 1 can be easily mounted on the circuit board 12. The resonator is electrically connected via the ground pattern 13 and the ground terminal 11', and the resonator is mechanically fixed to the circuit board 12. Further, the input/output terminal 4' is electrically connected to the circuit pattern 14 by solder 15 and coupled to an external circuit.

Since the resonator is mounted so that its central axis is located parallel to the circuit board 12, if the length of the resonator in the axial direction is longer than the length in the direction perpendicular to the axial direction, the circuit board 12 The component mounting height is lower.

In addition, when the resonator has a frequency variable mechanism as shown in Embodiment 3, there is no need to drill a hole in the circuit board for an adjustment screwdriver inserted into the screw hole 9 to move the screw 10, and the adjustment screwdriver It is possible to eliminate the adverse effects caused by the proximity of the circuit pattern 14 to the circuit pattern 14.

In addition, 1. Second. Third. 4th. In the sixth embodiment, the conductor case has a cylindrical shape, but it may also have a rectangular cylindrical shape.

Effects of the Invention As described above, the present invention arranges the resonant coil inside the conductor case, so that the electromagnetic field distribution related to resonance is inside the conductor case, so it is less susceptible to external influences, and one end of the resonant coil is By using input/output terminals, the structure becomes simple, and by filling the conductor case with dielectric material, the length of the conductor wire of the resonant coil can be shortened, resulting in a small size and high Q.
can be realized.

'The bottom and side surfaces of the conductor case are formed separately by electrically connecting the ground terminal of the conductor of the resonant coil to the boundary point with the bottom surface of the side surface of the conductor case or in the vicinity thereof,
It is possible to attach the bottom surface after attaching the resonant coil and the sides.

Furthermore, the resonant frequency can be varied by providing a screw hole in the dielectric inside the resonant coil, fitting a metal, dielectric, or magnetic screw into the screw hole and moving the screw.

Furthermore, by providing one or more ground terminals that are electrically connected to the conductor case on the open side of the conductor case, the conductor case can be grounded to the external circuit ground through the ground terminal with simple installation. be able to.

Furthermore, by taking out the ground terminal at right angles to the axial direction of the resonator, when the resonator is mounted on a circuit board and the length of the resonator in the axial direction is longer than the length in the direction perpendicular to the axial direction, The mounting height on the circuit board can be lowered. Further, when the resonator has a frequency variable mechanism, there is no need to make a hole in the circuit board for the frequency adjustment driver, and the adverse effects caused by the adjustment driver coming close to the circuit pattern can be eliminated. −゛

[Brief explanation of drawings]

1 and 2 are respectively a side sectional view and a top view of a resonator according to a first embodiment of the present invention, and FIG. 3 is a side sectional view and a top view of a resonator according to a second embodiment of the present invention. The figure is a side sectional view of a resonator in a third embodiment of the present invention, and FIGS. 5, 6, and 7 are a side view, a perspective view, and a perspective view, respectively, of a resonator in a fourth embodiment of the present invention. FIGS. 8, 9, and 10 are side views and perspective views of the resonator according to the sixth embodiment of the present invention, as well as a side view of the resonator mounted on an external circuit board, and FIGS. The side view and FIG. 11 are side sectional views of the conventional embodiment. 1... Conductor case, 2... Resonant coil, 3... Dielectric, 4, 41... Input/output terminal, 5... Ground terminal, 9...screw hole, 1o...screw, 11.11'...ground terminal. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure Open side Figure 2 Figure 3 Figure 5 Figure 6 Figure 7 Figure 13F+ - Figure 8 Figure 9

Claims (6)

[Claims] (1) A resonant coil made of a spirally wound conductor is placed inside a cylindrical or prismatic conductor case that has an open bottom on one side perpendicular to the central axis and a closed bottom on the other side. one end of the conductor wire is a ground terminal and the other end is an input/output terminal, the ground terminal is electrically connected to a part of the conductor case, and the input/output terminal is taken out from the open surface side;
A resonator characterized in that the conductor case is filled with a dielectric material. (2) The resonator according to claim 1, wherein the ground terminal of the conductor is electrically connected to the bottom surface of the conductor case. (3) The resonator according to claim 1, wherein the ground terminal of the conductive wire is electrically connected to the boundary point between the side surface of the conductor case and the bottom surface of the conductor case or in the vicinity thereof. (4) A screw hole along the central axis is created in the center of the dielectric filled inside the resonant coil, and a screw made of dielectric, metal, or magnetic material is inserted into the screw hole so that the screw is aligned with the central axis. The resonator according to claim 1, 2, or 3, characterized in that the resonator has a structure that allows it to be moved up and down mechanically along the resonator. (5) Claims (1) and (2) characterized in that the conductor case has a structure having one or more ground terminals electrically connected to the conductor case on the open surface side thereof. , the resonator according to item 3 or 4. (6) The resonator according to claim 5, wherein the direction in which the ground terminal is taken out is perpendicular to the central axis.