JPH01226201A - Resonator - Google Patents

Abstract

PURPOSE:To securely attain capacity adjustment by connecting the transmitting line of both open edges in a loop dielectric by means of capacities and providing an electrode pattern in a back surface through the dielectric of both open edge parts in the transmitting line. CONSTITUTION:A notch part is provided on the bottom of both open edge parts of the transmitting line 1 in the dielectric 2 of a cylinder and an electrode 5 is provided in the notch part, whereby the capacities 6 are generated between the open edge parts and the electrode 5 through the dielectric. Since the open edge parts are equivalently constituted in a loop by the capacity value, the narrower a space between said open edges and the electrode 5 or the higher the dielectric constant of the dielectric, the larger capacities can be generated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to resonators such as oscillators and filters used in the same wave number region on a U I-IF band plate.

BACKGROUND OF THE INVENTION When constructing conventional oscillators and filters, a resonator is a component that influences high frequency characteristics. The basic performance of this resonator is that it must be small and have a high no-load Q. A split ring resonator (hereinafter abbreviated as a 2nd resonator) is known as a device that satisfies this requirement, and its details are disclosed in Japanese Patent Publication No. 13641/1983. Figure 2 shows a typical shape of the transmission line l, which has a length of one-half wavelength or less and is open at both ends. The open transmission line 1 is formed into a loop shape by an external capacitor 3. Further, the line 4 on the lower surface serves as a ground electrode. The transmission line 1 and the external capacitor 3 are usually fixedly attached by solder processing.

Problems to be Solved by the Invention However, when constructing this ring resonator, it is difficult to process parts such as the transmission line formed on the dielectric material and the external capacitive element, or the process of fixing the transmission line part and the capacitive element. There were problems with the number of process steps and the difficulty of mounting work, such as migration at the adhesive part, which is a problem when fixing adhesives using a soldering process. Furthermore, in order to adjust the resonance damping frequency of the resonator, the electrode part of the external capacitor element is ground after the capacitor is attached to the main body part.
＼-・ Components flow at the junction between the transmission line and the external capacitor, resulting in poor conduction and other problems, which are extremely problematic in terms of characteristics.

In view of the above-mentioned problems, the present invention provides a resonator in which the dielectric of the capacitive element is integrated and the capacitance can be adjusted reliably.

Means for Solving the Problems In the present invention, transmission lines at both open ends of a loop-shaped dielectric are connected by a capacitor, and the capacitor is connected to an electrode pattern on the back side of the transmission line via the dielectric at both open ends. It is formed by providing.

Function The present invention uses a material having a dielectric constant that allows the capacitance value determined in design to be formed in the dielectric resonator part and the external capacitance element constituting the split ring resonator, and forms a resonant line in the negative plane. By forming a ground conductor on the other side through the dielectric and providing an electrode pattern on the back side of the open end of the transmission line, the open end of the transmission line and the electrode pattern are connected through the dielectric. A capacitance is formed.

For this reason, conventionally, the dielectric resonator part and the external capacitive element constituting the ring resonator were processed and mounted as separate parts, but the structure of the present invention allows the ring resonator to be integrated. and its adjustment is easy.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a resonator in one embodiment of the present invention.

In Fig. 1, I is a loop-shaped transmission line with both ends open;
2 is a hollow cylindrical dielectric having a notch on the bottom surface 2a. Reference numeral 4 designates a ground conductor provided on the bottom surface of the dielectric 2 except for the cutout portion of the bottom surface 2a, and 5 represents an electrode provided on the bottom surface 2a of the dielectric 2.

In the above configuration, the transmission line 1 which is open on the cylindrical dielectric body 2 is conventionally configured in a loop shape using an external capacitive element.
By providing a cutout in the cutout and providing the electrode 5 in the cutout, a capacitor 6 is formed between the open end and the electrode 5 via a dielectric. Since the open end is equivalently configured in a loop shape with this capacitance value, the smaller the distance between the open end and the electrode 5, or the higher the dielectric constant of the dielectric, the larger the capacitance becomes. Can be formed.

Effects of the Invention As described above, the present invention attempts to integrate an external capacitive element, which was conventionally required in order to configure a conventional ring-shaped resonator in a loop shape, by configuring it as a part of the dielectric material. The ring resonator can be constructed by processing only the main body of the dielectric, instead of the dielectric and the external capacitive element being processed and adjusted separately. Moreover, it is possible to prevent problems such as migration at the open end of the transmission line, which occurs when fixed attachment is performed by soldering. Furthermore, the resonant frequency of the resonator can be easily adjusted by cutting the open end of the transmission line that also serves as the electrode through the dielectric. The economic impact on is extremely dog.

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[Brief explanation of the drawing]

FIG. 1 is a perspective view of a resonator according to an embodiment of the present invention, and FIG. 2 is a perspective view of a conventional sgerite ring resonator. ■...Transmission line, 2...Dielectric, 4...Grounding conductor, 5...Electrode, 6...Capacitor.

Claims (1)

[Claims] A transmission line at both open ends is connected to a loop-shaped dielectric by a capacitance, and the capacitance is formed by providing an electrode pattern on the back side of the transmission line via the dielectric at both open ends. resonator.