Abstract: A distributed constant circuit includes a plurality of insulator layers including a first insulator layer that contains a first transmission line formed into a rectangular ring of less than one turn, a second insulator layer that contains a second transmission line which is electrically connected to the first transmission line through an inter-layer connection conductor, and which is formed into a rectangular ring of less than one turn, and a third insulator layer containing a ground electrode. In the distributed constant circuit, a rectangular spiral circuit pattern including the first transmission line and the second transmission line is formed by laminating the plurality of insulator layers.

Abstract: In a band-pass filter using at least one resonant circuit, a resonant circuit having multiple matching frequencies, a filter circuit having an attenuation pole at a lower/higher frequency of a pass band using the resonant circuit, and a multilayered substrate using the resonant circuit are provided. The resonant circuit includes an input transmission line, an output transmission line of which an input terminal is connected to an output terminal of the input transmission line, a first capacitor of which one terminal is connected to an input terminal of the input transmission line and the other terminal is connected to an output terminal of the output transmission line, a main resonant transmission line of which one end of is connected to an output terminal of the input transmission line, and a second capacitor of which one end is connected to the other side of the resonance main transmission line and the other side is grounded.

Abstract: A multilayer balun comprises first and second transmission lines that constitute a half-wave transmission line are opposed in adjacent layers, with a dielectric substance therebetween, so that, during use, the current of the first transmission line and the current of the second transmission line flow in the same direction. Thus, magnetic shield is formed between the first and second transmission lines. This eliminates the need for a grounding electrode layer for preventing magnetic interference between the first and second transmission lines.

Abstract: A capacitor block includes a first capacitor electrode connected to a first terminal, a first common capacitor electrode, a third capacitor electrode connected to a third terminal, a second common capacitor electrode, and a second capacitor electrode connected to a second terminal. One surface of the first capacitor electrode faces one surface of the first common capacitor electrode with a dielectric material therebetween. The other surface of the first common capacitor electrode faces one surface of the third capacitor electrode with a dielectric material therebetween. The other surface of the third capacitor electrode faces one surface of the second common capacitor electrode with a dielectric material therebetween. The other surface of the second common capacitor electrode faces one surface of the second capacitor electrode with a dielectric material therebetween. The first common capacitor electrode is electrically connected to the second common capacitor electrode.

Abstract: A filter circuit comprises a first impedance element disposed in an input side, a second impedance element disposed in an output side, having an input end connected to an output end of the first impedance element, and made of the same component as that of the first impedance element, a distributed constant resonance circuit having one end connected to a junction between the output end of the first impedance element and the input end of the second impedance element, and a third impedance element having one end connected to the input end of the first impedance element and the other end connected to the output end of the second impedance element. The first and second impedance elements and the distributed constant resonance circuit are each constituted by a transmission line having a predetermined distributed constant, and the third impedance element is constituted by a capacitor having a predetermined concentrated constant.

Abstract: A multilayer balun comprises first and second transmission lines that constitute a half-wave transmission line are opposed in adjacent layers, with a dielectric substance therebetween, so that, during use, the current of the first transmission line and the current of the second transmission line flow in the same direction. Thus, magnetic shield is formed between the first and second transmission lines. This eliminates the need for a grounding electrode layer for preventing magnetic interference between the first and second transmission lines.

Abstract: In a band-pass filter using at least one resonant circuit, a resonant circuit having multiple matching frequencies, a filter circuit having an attenuation pole at a lower/higher frequency of a pass band using the resonant circuit, and a multilayered substrate using the resonant circuit are provided. The resonant circuit includes an input transmission line, an output transmission line of which an input terminal is connected to an output terminal of the input transmission line, a first capacitor of which one terminal is connected to an input terminal of the input transmission line and the other terminal is connected to an output terminal of the output transmission line, a main resonant transmission line of which one end of is connected to an output terminal of the input transmission line, and a second capacitor of which one end is connected to the other side of the resonance main transmission line and the other side is grounded.

Abstract: A capacitor block includes a first capacitor electrode connected to a first terminal, a first common capacitor electrode, a third capacitor electrode connected to a third terminal, a second common capacitor electrode, and a second capacitor electrode connected to a second terminal. One surface of the first capacitor electrode faces one surface of the first common capacitor electrode with a dielectric material therebetween. The other surface of the first common capacitor electrode faces one surface of the third capacitor electrode with a dielectric material therebetween. The other surface of the third capacitor electrode faces one surface of the second common capacitor electrode with a dielectric material therebetween. The other surface of the second common capacitor electrode faces one surface of the second capacitor electrode with a dielectric material therebetween. The first common capacitor electrode is electrically connected to the second common capacitor electrode.