Abstract: In a ladder-type piezoelectric filter, the attenuation in the stop bands on a low frequency side and a high frequency side are increased while the pass band is widened. The ladder-type piezoelectric filter is made up by alternately connecting parallel arms and series arms. The parallel arms are respectively made up by serially connecting parallel resonators and LC element networks, and the series arms are respectively made up of series resonators. The LC element networks are respectively made up so as to be inductive in resonant frequencies of the serially connected parallel resonators. Further, the LC element networks include capacitors which contribute to formation of a new series resonant point in the stop band on the high frequency side.

Abstract: In a ladder-type piezoelectric filter, attenuation in stop bands on a low frequency side and a high frequency side are increased while a pass band is widened. The ladder-type piezoelectric filter is made up by alternately connecting parallel arms and series arms. The parallel arms are respectively made up by serially connecting parallel resonators and LC element networks, and the series arms are respectively made up of series resonators. The LC element networks are respectively made up so as to be inductive in resonant frequencies of the serially connected parallel resonators. Further, the LC element networks include capacitors which contribute to formation of a new series resonant point in the stop band on the high frequency side.

Abstract: Four shock absorbers are connected to a control cylinder. The control cylinder includes a housing body portion having two cylinder chambers which are divided by a partition wall portion; and a piston assembly which is formed by coupling two pistons with each other using a coupling rod. Two outer side control chambers and two inner side control chambers are connected to respective absorber chambers. Pressure receiving areas of outer side pressure-receiving surfaces and inner side pressure-receiving surfaces of the pistons and damping characteristics of the shock absorbers are set such that a direction in which the piston assembly moves in a region where an operation speed is low is opposite to a direction in which the piston assembly moves in a region where the operation speed is high.

Abstract: A vehicle suspension system for a vehicle, including: (a) a plurality of suspension cylinders each disposed between a chassis-side member and a corresponding one of a plurality of wheel-side members; (b) a controller cylinder including a housing and at least one piston slidably mounted in the housing, such that the housing and the at least one piston cooperate to define a plurality of chambers each having a volume that is variable upon slide movement of the at least one piston relative to the housing; (c) individual conduits each communicating a corresponding one of the plurality of chambers of the controller cylinder and a chamber of a corresponding one of the plurality of suspension cylinders; and (d) a suspension-cylinder operation facilitator operable to facilitate an operation of each of the plurality of suspension cylinders for permitting displacement of each of the plurality of wheel-side members relative to the chassis-side member after the at least one piston of the controller cylinder has reached it

Abstract: A suspension system for a vehicle, comprising a plurality of suspension cylinders such as shock absorbers (10, 12, 14, 16) which correspond to respective wheels of the vehicle and which have respective hydraulic chambers (28), and a control cylinder (48; 100) having a cylinder housing (52; 104), and a piston assembly (50; 102) which is fluid-tightly and slidably fitted in the cylinder housing and which includes a plurality of pistons (70, 72, 74, 76; 110, 112, 114) and at least one connecting rod (66, 68; 116, 118) connecting the plurality of pistons. The control cylinder has a plurality of hydraulic chambers (70, 72, 74, 76; 130, 132, 134, 136, 138, 140) to which are respectively connected the hydraulic chambers of the plurality of suspension cylinders. The plurality of pistons of the piston assembly include at least two pistons which have respective different diameters.

Abstract: A suspension apparatus includes a fluid cylinder for a wheel of a vehicle; at least one of a first controller and a second controller; and a third controller. The fluid cylinder for the wheel of the vehicle is provided between a wheel-holding device that holds the wheel and the vehicle body. The first controller includes (a) an accumulator connected to the fluid cylinder; and (b) an electromagnetic control valve provided between the accumulator and the fluid cylinder. The second controller includes (a) a fluid source that includes a high-pressure source and a low-pressure source; and (b) an electromagnetic control valve, provided between the fluid source and the fluid cylinder, which controls the flow of fluid between the fluid cylinder and the fluid source. The third controller suppresses the pulsation of the fluid caused by operating the electromagnetic control valve included in at least one of the first controller and the second controller.

Abstract: A vehicle suspension system for a vehicle, including: (a) a plurality of suspension cylinders each disposed between a chassis-side member and a corresponding one of a plurality of wheel-side members; (b) a controller cylinder including a housing and at least one piston slidably mounted in the housing, such that the housing and the at least one piston cooperate to define a plurality of chambers each having a volume that is variable upon slide movement of the at least one piston relative to the housing; (c) individual conduits each communicating a corresponding one of the plurality of chambers of the controller cylinder and a chamber of a corresponding one of the plurality of suspension cylinders; and (d) a suspension-cylinder operation facilitator operable to facilitate an operation of each of the plurality of suspension cylinders for permitting displacement of each of the plurality of wheel-side members relative to the chassis-side member after the at least one piston of the controller cylinder has reached it

Abstract: Four shock absorbers are connected to a control cylinder. The control cylinder includes a housing body portion having two cylinder chambers which are divided by a partition wall portion; and a piston assembly which is formed by coupling two pistons with each other using a coupling rod. Two outer side control chambers and two inner side control chambers are connected to respective absorber chambers. Pressure receiving areas of outer side pressure-receiving surfaces and inner side pressure-receiving surfaces of the pistons and damping characteristics of the shock absorbers are set such that a direction in which the piston assembly moves in a region where an operation speed is low is opposite to a direction in which the piston assembly moves in a region where the operation speed is high.

Abstract: A space is defined in a portion of an overlapping region where an open end portion of a resonant electrode and an inner-layer ground electrode, of a dielectric layer which is interposed between the resonant electrode and the inner-layer ground electrode. A space is defined in a portion of an overlapping region where the open end portion of the resonant electrode and another inner-layer ground electrode, of a dielectric layer which is interposed between the resonant electrode and the other inner-layer ground electrode. These spaces are filled with respective members having a dielectric constant higher than the dielectric layers.

Abstract: A stacked type dielectric resonator includes a plurality of stripline conductors disposed in a dielectric substrate composed of a plurality of stacked dielectric layers. Ground electrode portions are continuously formed on portions of the dielectric substrate. Via holes are provided to electrically connect the respective stripline conductors to portions of the round electrode disposed on an upper or lower surface, and another portion of the ground electrode is connected to at least one side surface.

Abstract: A multilayered circuit board is constructed such that holes penetrating through second and third dielectric layers, interposed between a pair of electrodes for constructing a capacitor, are filled with a material having a high dielectric constant respectively in a capacitor-forming area, and a plurality of (for example, four) holes are filled with a material having a high magnetic permeability respectively so as to penetrate through first to fifth dielectric layers in a magnetic flux-passing area of a coil constructed by coil electrodes of first to fifth turns in a coil-forming area.

Abstract: A transmitter 18 and a receiver 24 are formed integrally with a dielectric substrate 12. The transmitter 18 includes a transmitter filter 14 and a transmitter antenna 16 connected to the transmitter filter 14. The receiver 24 includes a receiver filter 20 and a receiver antenna 22 connected to the receiver filter 20. The transmitter filter 14 is formed with resonant elements 30a-30c arranged parallel to each other. The transmitter antenna 16 includes an antenna 32 formed from an electrode film on the upper surface of the receiver filter 20. The receiver filter 20 is formed from resonant elements 34a-34c arranged parallel to each other. The receiver antenna 22 includes an antenna 36 formed from an electrode film on the upper surface of the dielectric substrate 12.

Abstract: A stacked dielectric filter includes two sets of resonators arranged in a dielectric substrate constructed by laminating a plurality of dielectric layers, in which each of the resonators includes at least two resonance electrodes superimposed in a stacking direction. One of the resonance electrodes of the two resonance electrodes for constructing each of the resonators is formed to have a wide width as compared with the other resonance electrode. Accordingly, even when stacking deviations occur in the plurality of resonance electrodes during the production process, it is possible to decrease the variation of characteristics. Thus, it is possible to maximally exhibit the effect (high Q value, small size, and high performance) to be obtained by constructing the resonator by superimposing the plurality of resonance electrodes in the stacking direction.

Abstract: A space is defined in a portion of an overlapping region where an open end portion of a resonant electrode and an inner-layer ground electrode, of a dielectric layer which is interposed between the resonant electrode and the inner-layer ground electrode. A space is defined in a portion of an overlapping region where the open end portion of the resonant electrode and another inner-layer ground electrode, of a dielectric layer which is interposed between the resonant electrode and the other inner-layer ground electrode. These spaces are filled with respective members having a dielectric constant higher than the dielectric layers.

Abstract: An antenna device is constructed such that a short circuit exists between an antenna formed on an outer surface of a dielectric substrate and an input end side resonance electrode of a filter section formed on the inside of the dielectric substrate. An output end side resonance electrode of the filter section and an output electrode are coupled to one another via a capacitance. Accordingly, noise current is not allowed to flow to an electronic circuit, which is connected to the antenna device.

Abstract: An antenna device comprises an antenna section and a filter section which are formed in an integrated manner in a dielectric substrate, wherein the antenna section and the filter section are coupled to one another via a capacitance. Further, 0.3×Lr≦Lt≦1.2×Lr is satisfied provided that an antenna length of the antenna section is Lt, and an antenna length measured for a single antenna is Lr. Accordingly, it is possible to realize a small size of the antenna device while avoiding the decrease in gain and the disadvantage of narrow band.

Abstract: An antenna device is provided with a dielectric substrate comprising a large number of stacked dielectric layers and having at least an input/output terminal and a ground electrode formed on its outer circumferential surface. A plurality of ½ wavelength resonator elements of the both ends-open type are arranged in parallel to one another in the dielectric substrate respectively to construct a filter section. An antenna section is formed and constructed on the surface of the dielectric substrate. Two input/output electrodes are formed in the dielectric substrate, which are arranged at positions of point symmetry with respect to a center in the length direction of at least the resonator element disposed on the output side, of the plurality of ½ wavelength resonator elements. The two input/output electrodes are connected to balanced input/output terminals of the antenna section respectively.

Abstract: A multilayered circuit board is constructed such that holes penetrating through second and third dielectric layers interposed between a pair of electrodes for constructing a capacitor are filled with a material having a high dielectric constant respectively in a capacitor-forming area, holes penetrating through first to fourth dielectric layers interposed between a pair of electrodes for constructing a resistor are filled with a resistor material for obtaining a desired value of resistance in a resistor-forming area, and a plurality of (for example, four) holes are filled with a material having a high magnetic permeability respectively so as to penetrate through first to fifth dielectric layers in a magnetic flux-passing area of a coil constructed by coil electrodes of first to fifth turns in a coil-forming area.

Abstract: A laminated type dielectric filter including a first stage symmetric type strip line resonator and a last stage symmetric type strip line resonator each having at least two resonating elements arranged to oppose one another via dielectric layers, said resonators being aligned in a direction perpendicular to a stacking direction in which said resonating elements are stacked, an input electrode for coupling the first stage symmetric type strip line resonator to an input terminal, an output electrode for coupling the last stage symmetric type dielectric filter to an output terminal, an earth electrode substantially surrounding an outer surface of the laminated type dielectric filter, plural interlayer earth electrodes connected to the earth electrode, and one or more coupling electrode for coupling said plural symmetric type strip line resonators, said the resonating elements, input electrode, output electrode, interlayer earth electrodes and coupling electrodes are isolated by means of dielectric layers, and el

Abstract: A stacked type dielectric resonator comprises a plurality of stripline conductors disposed in a dielectric substrate composed of a plurality of stacked dielectric layers, and a ground electrode formed on the dielectric substrate, wherein via holes are provided, which electrically connect the respective stripline conductors, for example, to portions of the ground electrode disposed on a lower surface respectively.