JPH0257007A - Resonator - Google Patents

Abstract

PURPOSE:To easily execute control work by constituting one capacitor of a resonator with using a trimmer capacitor. CONSTITUTION:Conducting patterns 2 and 3 are respectively formed in a position not to be mutually faced through a dielectric substrate 1. Lead terminals 9 and 10 of a trimmer capacitor 8 are respectively soldered and fit to the other side of the conducting pattern 2 and a terminal pattern 6. Thus, the conducting patterns 2 and 3 respectively form inductors L1 and L2 and capacity to be formed by capacitor electrode patterns 4 and 5 forms a capacitor C1. Then, the trimmer capacitor 8 forms a capacitor C2. Thus, by controlling the capacity value of the trimmer capacitor 8, the resonating frequency of the resonator can be controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a resonator used in a high frequency region.

(Prior Art) Conventionally, as this type of resonator, a structure shown in FIGS. 6 and 7 has been used. FIG. 6 shows one side of the resonator, and FIG. 7 shows the other side. In the resonator shown in these figures, two capacitor electrode patterns 22 and 23 are formed on one surface of a dielectric substrate 21, and the capacitor electrode patterns 22 and 23 on the other surface are formed on the other surface. Two capacitor electrode patterns 24 and 25 are formed facing each other with the body substrate 21 interposed therebetween. Further, on one surface of the dielectric substrate 21, two capacitor electrode patterns 22.2 are formed thereon.
A conductive pattern 26 connecting the two capacitor electrode patterns 2425 is formed on the other surface, and a conductive pattern 27 connecting the two capacitor electrode patterns 2425 formed thereon is formed on the other surface. These conductive patterns 26 and 27 are provided at positions that do not face each other with the dielectric substrate 21 in between. Further, lead terminals 28 and 29 are connected to the capacitor electrode pattern 23 on one side of the dielectric substrate 21 and the capacitor electrode pattern 25 on the other side, respectively.

The resonator having such a configuration has an equivalent circuit as shown in FIG. 8 because the conductive patterns 26 and 27 each function as an inductor in a high frequency region. That is, the capacitor electrode patterns 22 and 2
A capacitor C1 is formed between the capacitor C1 and the inductors L, L, 2 formed by conductive patterns 26 and 27, respectively, to both ends of the capacitor C1. ,
The circuit configuration is such that a capacitor C2 formed between capacitor electrode patterns 23 and 25 is connected in parallel to a series circuit with capacitor electrode patterns 23 and 25.

(Problems to be Solved by the Invention) A resonator having the configuration as described in item 1 can be obtained by, for example, cutting off a part of the capacitor electrode pattern 23 and adjusting the value of the capacitor C2 shown in the equivalent circuit of FIG. Adjust the resonance frequency.

However, according to this method of adjusting the resonance frequency,
For example, if the area of the capacitor electrode pattern 23 is small, the area to be removed will be the same, and the range of change in the resonance frequency will be larger than if the area is large (it is difficult to finely adjust the J resonance frequency). In addition, it is necessary to increase the adhesion force to the dielectric substrate 21 surface for the purpose of stabilizing the electrical connection of the capacitor electrode pattern 23 (J) or for soldering (to improve the J property). Therefore, there is a problem that it takes time to scrape off the capacitor electrode pattern 23.
The same applies to other capacitor electrode patterns. Furthermore, when the dielectric substrate 2I is thin, when the capacitor electrode pattern 23 is scraped off, the dielectric substrate 2I
The problem is that the work must be done carefully to prevent cracks from forming, and the work is time-consuming.

The present invention (J) has been made in view of the above-mentioned problems, and has the fourteenth purpose of providing a novel resonator whose resonant frequency can be adjusted extremely easily.

(Means for Solving the Problems) In order to achieve such an object, in the resonator of the present invention, two capacitor electrode patterns formed by It is characterized in that it is constructed using a =J capacitor trimmer capacitor of one of the capacitors.

(Function) By configuring one capacitor of the resonator using a trimmer capacitor, the resonant frequency can be adjusted by adjusting the capacitance value of the trimmer capacitor, and as a result, the adjustment work is extremely easy. Become.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view showing one side of a resonator according to an embodiment of the present invention, and FIG. 2 is a plan view showing the other side of the resonator. In these figures, reference numeral 1 indicates a dielectric substrate. Conductive patterns 2 and 3 are formed on one side and the other side of the dielectric substrate 1, respectively, at positions that do not face each other with the dielectric substrate 1 in between. Furthermore, capacitor electrode patterns 4 and 5 are formed on one surface and the other surface of the dielectric substrate I, respectively, at positions facing each other with the dielectric substrate 1 interposed therebetween. The capacitor electrode patterns 4 and 5 are connected to one end side of the conductive patterns 2 and 3, respectively. Furthermore, a terminal pattern 6 is formed on one surface of the dielectric substrate (2) at a position corresponding to the other end side of the conductive pattern 3 on the other surface. This terminal pattern 6 is connected to the conductive pattern 3 on the other side via a through pole 7 formed on the dielectric substrate 1. The conductive patterns 2 and 3, the capacitor electrode pattern 45, and the terminal pattern 6 can be formed simultaneously by printing electrode pastes such as Ag, respectively. Further, it is also possible to form by means such as electroless plating of N1, vapor deposition, and sputtering.

The lead terminals 9 of the trimmer capacitor 8 are attached to the other end side of the conductive pattern 2 and the terminal pattern 6 on one surface of the dielectric substrate 1 on which the respective patterns have been formed as described above. ! o are soldered and taken out (-J' i-1). Also, lead terminals II and 12 are attached to the other ends of the conductive patterns 2 and 3 on one side and the other side of the dielectric substrate 1, respectively. It has been soldered and removed.

The resonator configured in this manner has substantially the same equivalent circuit as the conventional one shown in FIG. 8, as shown in FIG. 3, since each of the conductive patterns 23 functions as an inductor in the high frequency region. becomes. That is, the conductive patterns 2.3 form inductors Ll and L2, respectively, the capacitance formed by the capacitor electrode patterns 4 and 5 forms a capacitor C1, and the trimmer capacitor 8 forms a capacitor C2. Therefore, by adjusting the capacitance value of the trimmer capacitor 8, the resonant frequency of the resonator can be adjusted.

In the resonator in the above embodiment, the terminal pattern 6 and the conductive pattern 3 for removing the trimmer capacitor 8 are connected through the through hole 7, but the through hole 7 is not used. conductive pattern 3 and terminal pattern 6.
This may be done indirectly via a capacitance formed between the two.

Further, even when using the through pole 7, it is also possible to insert the lead terminal 10 of the trimmer capacitor 8 into the through pole 7 and connect it directly to the conductive pattern 3 without forming the terminal pattern 6. In short, it is sufficient to provide a trimmer capacitor on one surface of the dielectric substrate l connected to the other ends of the conductive patterns 2 and 3 on the one surface and the other surface. Furthermore, in the resonator in the above embodiment, the capacitor electrode pattern 4.5 is connected to one end of the conductive pattern 2.3, and the trimmer capacitor 8 is connected to the other end of the conductive pattern 23. The pattern and the trimmer capacitor may be connected at opposite positions.

Furthermore, if two resonators of the second embodiment are formed at the same time using a large dielectric substrate I as shown in FIG. Can be configured. FIG. 5 shows an equivalent circuit of the filter having the configuration shown in FIG. In this case as well, the center frequency can be adjusted by adjusting the capacitance value of the trimmer capacitor 8. Furthermore, it is also possible to form a filter by forming three or more resonators of the above embodiments on the same dielectric substrate.

(Effects of the Invention) As is clear from the above explanation, according to the present invention,
Since the resonator was constructed using a trimmer capacitor, by adjusting the capacitance value of the trimmer capacitor,
The resonance frequency can be easily adjusted.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one surface side of a resonator according to an embodiment of the present invention, FIG. 2 is a plan view showing the other surface side of a resonator according to the same embodiment, and FIG. 3 is a plan view showing the other surface side of a resonator according to the same embodiment. FIG. 4 is a plan view of a filter as an application example of the resonator of the present invention, and FIG.
The figure is an equivalent circuit diagram of the filter of FIG. 4. Fig. 6 is a plan view showing one side of the conventional resonator, Fig. 7 is a plan view showing the other side of the conventional resonator, and Fig. 8 is an equivalent circuit diagram of the conventional resonator. It is. ■ Dielectric substrate, 2, 3 Conductive pattern, 4, 5... Trimmer capacitor, 6... Terminal pattern, 7... Through pole, 8. Trimmer capacitor, 1112...
・Lead terminal.

Claims (1)

[Claims] (1) Form conductive patterns at positions on one side and the other side of the dielectric substrate that do not face each other through the dielectric substrate, and at positions facing each other through the dielectric substrate on one side and the other side. A capacitor electrode pattern is formed by connecting to one end side of the conductive pattern formed on the dielectric substrate, and a trimmer capacitor is provided on one side of the dielectric substrate, connected to the other end side of the conductive pattern on one side and the other side. A resonator featuring: