Abstract: A dielectric substrate is provided with first and second conductor openings communicating with each other via a first slit, and third and fourth conductor openings communicating with each other via a second slit, and the slits intersect each other. With this structure, two resonant modes including an even mode in which magnetic field vectors are directed from the first to third conductor openings and from the fourth to second conductor openings, and an odd mode in which magnetic field vectors are directed from the third to second conductor openings and from the first to fourth conductor openings, or two resonant modes including an X mode in which magnetic field vectors are directed from the first to second conductor openings, and a Y mode in which magnetic field vectors are directed from the third to fourth conductor openings are generated.

Abstract: A dielectric substrate is provided with first and second conductor openings communicating with each other via a first slit, and third and fourth conductor openings communicating with each other via a second slit, and the slits intersect each other. With this structure two resonant modes including an even mode in which magnetic field vectors are directed from the first to third conductor openings and from the fourth to second conductor openings, and an odd mode in which magnetic field vectors are directed from the third to second conductor openings and from the first to fourth conductor openings, or two resonant modes including an X mode in which magnetic field vectors are directed from the first to second conductor openings, and a Y mode in which magnetic field vectors are directed from the third to fourth conductor openings are generated.

Abstract: A three-dimensional periodic structure, a method of producing the same, a high frequency element, and a high frequency apparatus that can be applied to a signal transmission path or a functional element in, for example, a compact functional element in a frequency range lower than optical frequencies, such as the microwave range are provided. The three-dimensional periodic structure includes a three-dimensional periodic structure component which includes two substances having different dielectric constants periodically distributed in three-dimensional axial directions, a dielectric layer having a predetermined thickness provided at the periphery thereof, and a conductor provided on external surfaces of the dielectric layer. A third material which is different from the two substances and having predetermined dimensions embedded into the three-dimensional periodic structure component can be provided. A transmission path integrally equipped with a conductor is constructed, which is used as a pipe of a waveguide.

Abstract: In a complex circuit board, the positional relationships between element portions, including an electrode pattern, a dielectric substrate and a magnetic substrate, can be adjusted as desired, and the complex circuit board can be miniaturized. The complex circuit board includes a dielectric substrate and a magnetic substrate, a space being provided between the magnetic substrate and the dielectric substrate, and an electrode pattern provided between the dielectric substrate and the magnetic substrate, a capacitance element portion of the electrode pattern being provided adjacent or in contact with or spaced a predetermined distance from the dielectric substrate, and the inductance element portion of the electrode pattern being provided adjacent or in contact with or spaced a predetermined distance from the magnetic substrate.

Abstract: In a complex circuit board, the positional relationships between element portions, including an electrode pattern, a dielectric substrate and a magnetic substrate, can be adjusted as desired, and the complex circuit board can be miniaturized. The complex circuit board includes a dielectric substrate and a magnetic substrate, a space being provided between the magnetic substrate and the dielectric substrate, and an electrode pattern provided between the dielectric substrate and the magnetic substrate, a capacitance element portion of the electrode pattern being provided adjacent or in contact with or spaced a predetermined distance from the dielectric substrate, and the inductance element portion of the electrode pattern being provided adjacent or in contact with or spaced a predetermined distance from the magnetic substrate.

Abstract: A three-dimensional periodic structure, a method of producing the same, a high frequency element, and a high frequency apparatus that can be applied to a signal transmission path or a functional element in, for example, a compact functional element in a frequency range lower than optical frequencies, such as the microwave range are provided. The three-dimensional periodic structure includes a three-dimensional periodic structure component which includes two substances having different dielectric constants periodically distributed in three-dimensional axial directions, a dielectric layer having a predetermined thickness provided at the periphery thereof, and a conductor provided on external surfaces of the dielectric layer. A third material which is different from the two substances and having predetermined dimensions embedded into the three-dimensional periodic structure component can be provided. A transmission path integrally equipped with a conductor is constructed, which is used as a pipe of a waveguide.

Abstract: A dielectric transmission line attenuator or terminator, which is used with a dielectric transmission line provided with two conductive plates substantially parallel to each other and a dielectric strip held between the two conductive plates. A resistor film pattern is provided along a surface defined where upper and lower parts of the dielectric strip are divided, and substantially parallel to the two conductive plates. The resistor film pattern and the two conductive plates form a transmission line, and the dielectric transmission line and the transmission line are coupled.

Abstract: In a complex circuit board, the positional relationships between element portions, including an electrode pattern, a dielectric substrate and a magnetic substrate, can be adjusted as desired, and the complex circuit board can be miniaturized. The complex circuit board includes a dielectric substrate and a magnetic substrate, a space being provided between the magnetic substrate and the dielectric substrate, and an electrode pattern provided between the dielectric substrate and the magnetic substrate, a capacitance element portion of the electrode pattern being provided adjacent or in contact with or spaced a predetermined distance from the dielectric substrate, and the inductance element portion of the electrode pattern being provided adjacent or in contact with or spaced a predetermined distance from the magnetic substrate.

Abstract: A nonreciprocal circuit device can be reduced in size by omitting an impedance matching circuit. The nonreciprocal circuit device includes a ferrite member, a plurality of mutually intersecting central conductors disposed in proximity to the ferrite member, and a magnet for applying a DC magnetic field. The plurality of central conductors have lengths of substantially &lgr;g/2 or a multiple thereof with respect to a wavelength &lgr;g at a usable frequency. One end of each of the central conductors is connected to an input/output terminal, and the other end thereof is disconnected so as to be an electrically open end. Alternatively, the central conductors may have lengths of substantially &lgr;g/4 or a multiple thereof, the other ends thereof being grounded.

Abstract: In a complex circuit board, the positional relationships between element portions, including an electrode pattern, a dielectric substrate and a magnetic substrate, can be adjusted as desired, and the complex circuit board can be miniaturized. The complex circuit board includes a dielectric substrate and a magnetic substrate, a space being provided between the magnetic substrate and the dielectric substrate, and an electrode pattern provided between the dielectric substrate and the magnetic substrate, a capacitance element portion of the electrode pattern being provided adjacent or in contact with or spaced a predetermined distance from the dielectric substrate, and the inductance element portion of the electrode pattern being provided adjacent or in contact with or spaced a predetermined distance from the magnetic substrate.

Abstract: A dielectric nonreciprocal circuit device, which has satisfactory nonreciprocal characteristics obtained by improving the structure of a part supporting magnetic members, is incorporated in a radio device. The dielectric nonreciprocal circuit device has an arrangement such that supporting members for supporting the magnetic members are not located where the magnetic members are abutted against dielectric strips or where the magnetic members are disposed in close proximity to the dielectric strips.

Abstract: In a complex circuit board, the positional relationships between element portions, including an electrode pattern, a dielectric substrate and a magnetic substrate, can be adjusted as desired, and the complex circuit board can be miniaturized. The complex circuit board includes a dielectric substrate and a magnetic substrate, a space being provided between the magnetic substrate and the dielectric substrate, and an electrode pattern provided between the dielectric substrate and the magnetic substrate, a capacitance element portion of the electrode pattern being provided adjacent or in contact with or spaced a predetermined distance from the dielectric substrate, and the inductance element portion of the electrode pattern being provided adjacent or in contact with or spaced a predetermined distance from the magnetic substrate.

Abstract: A dielectric-waveguide attenuator, a dielectric-waveguide terminator, and a wireless apparatus incorporating the same in which the length of a dielectric waveguide is shortened in a direction in which an electromagnetic wave propagates to reduce the size of the overall module. The two parts of a split dielectric strip are placed between an upper conductive plate and a lower conductive plate to form the dielectric waveguide, and a substrate having at least two resistance-film patterns formed thereon is positioned between the two dielectric strips. With this arrangement, the resistance films both attenuate signals and also discontinuously change line impedance at a plurality of places and synthesize the electromagnetic waves reflected at the parts where the line impedance discontinuously changes so that the reflected waves cancel each other.

Abstract: A nonreciprocal circuit device includes conductive films that define a slot on the top of a magnetic member having ferrimagnetic characteristics. On the bottom of the magnetic member, other conductive films that define an opposing slot are formed. An external DC magnetic field is applied substantially parallel to the magnetic member and substantially perpendicular to the slots. Resistive films are formed alongside the slot on the top of the magnetic member. When a signal propagates in the direction from port #2 to port #1, the electromagnetic field of a planar dielectric line mode is localized in the direction of the resistive films. Electrical power is consumed by the resistive films, so that the signal is prevented from propagating. When the signal propagates in the direction from port #1 to port #2, no loss is caused by the resistive films. Therefore, the signal is transmitted with low loss.

Abstract: A nonreciprocal circuit device comprises a dielectric wave guide comprising a dielectric body with a center and with strips extending radially from the center in at least two directions and arranged between two conductor plates defining parallel conductor planes; a ferrite body arranged in the center of the dielectric strip; and a medium having a lower dielectric constant than the dielectric body arranged between at least a side face of the ferrite body and the conductor plates adjacent to the side face of the ferrite body. Grooves into which a dielectric strip is fitted are formed in the opposing surfaces of two conductor plates. The width of the dielectric strip is increased in the center of the dielectric strip and in the direction along the conductor planes of the conductor plates. At the widened location, a space is formed between the side walls of the grooves and the side faces of the ferrite sheets.

Abstract: A dielectric wave guide nonreciprocal circuit device wherein the efficiency of applying a DC magnetic field to ferrite plates is increased, the effect on other components of magnetic field leakage from magnets is reduced, and changes in the DC magnetic field, when other magnetic bodies are nearby, are reduced. The dielectric wave guide has dielectric strips clasped between conductive plates. Ferrite plates are provided at a center portion where the dielectric strips converge. Magnets are provided in concavities formed in outer sides of the conductive plates. A closed magnetic path is formed by surrounding the whole structure with magnetic members having side walls.

Abstract: A nonreciprocal circuit device wherein upper and lower yokes can easily be fitted together, thereby preventing the deviation between the upper and lower yokes to obtain excellent electric characteristics. The upper yoke is bent in a box shape, and provided with an upper wall and two pairs of side walls of approximately rectangular shape, a lower yoke is bent in a U-shape, and provided with a bottom wall and a pair of side walls opposite to each other. A chamfer and a taper continuous to the chamfer are executed on each end face of a lapped part of the side wall on side walls of the upper yoke. Moreover, a perpendicular part parallel to the upper yoke side wall is formed on a lapped part on the upper yoke side wall.

Abstract: A nonreciprocal circuit device with a plurality of central conductors each formed of a respective plurality of laminated strip conductors extending in the same direction. The central conductors overlap with each other at a specified angle. A ferrite is disposed where the central conductors overlap, and a DC magnetic field is applied to the overlapping portion. The strip conductors constituting two central conductors among the plurality of central conductors may be alternately laminated. Or, the strip conductors constituting one central conductor may sandwich those of another central conductor, to achieve strong electromagnetic coupling.

Abstract: A nonreciprocal circuit element having low insertion loss is provided. In the circuit element, three central conductors are disposed such that they intersect each other at specified angles in an electrically isolated condition and a DC bias magnetic field is applied to the intersection. The intersection angles formed by the central conductors are set to different values, corresponding to the rotation angle of the high-frequency magnetic field caused by the DC bias magnetic field. A stronger operating DC magnetic field than that in a conventional circuit element is used to reduce a ferrite loss.

Abstract: A non-reciprocal circuit element of reduced weight and manufactured at a lower cost without deteriorating the parallelism and the magnetic field distribution of a unidirectional magnetic field. The non-reciprocal circuit element may be a circulator having a ferrite member having a center electrode section in which a plurality of electrode lines which function as inductance components are disposed so as to intersect each other, forming a predetermined angle therebetween while being electrically insulated from each other. In this circulator, a magnetic member made of a magnetic material having a permeability higher than that of the ferrite member is formed integrally with a lower surface of the ferrite member. The ferrite member also has matching capacitance electrodes connected to input/output ports of the electrode lines to function as capacitance components. The center electrode section and the matching capacitance electrodes are incorporated in the ferrite member.