Abstract: A power transmission device includes a power conversion circuit that outputs an alternating voltage in order to generate an alternating magnetic field and a control circuit used to control a frequency of the alternating voltage. The control circuit sets, in a predetermined frequency range, the frequency of the alternating voltage to a higher one of a first frequency at which transmission efficiency is highest and a second frequency at which a voltage generated in the power receiving device is highest, and performs power transmission.

Abstract: A wireless power feeder has a power feed coil that performs a power feed by a non-contact method to a wireless power receiver having a power receive coil. A power source section supplies AC power to the power feed coil. A control section calculates a power transmission efficiency from the power feed coil to the power receive coil to control a power source section so that the power supply to the power feed coil is in a stopped or intermittent state when the power transmission efficiency is lower than a first determination reference value; is in a first power supply state when the power transmission efficiency is equal to or higher than the first determination reference value and lower than a larger second determination reference value; and is in a second power supply state when the power transmission efficiency is equal to or higher than the second determination reference value.

Abstract: A power transmission device includes a power conversion circuit that outputs an alternating voltage in order to generate an alternating magnetic field and a control circuit used to control a frequency of the alternating voltage. The control circuit sets, in a predetermined frequency range, the frequency of the alternating voltage to a higher one of a first frequency at which transmission efficiency is highest and a second frequency at which a voltage generated in the power receiving device is highest, and performs power transmission.

Abstract: A wireless power feeder has a power feed coil that performs a power feed by a non-contact method to a wireless power receiver having a power receive coil. A power source section supplies AC power to the power feed coil. A control section calculates a power transmission efficiency from the power feed coil to the power receive coil to control a power source section so that the power supply to the power feed coil is in a stopped or intermittent state when the power transmission efficiency is lower than a first determination reference value; is in a first power supply state when the power transmission efficiency is equal to or higher than the first determination reference value and lower than a larger second determination reference value; and is in a second power supply state when the power transmission efficiency is equal to or higher than the second determination reference value.

Abstract: A modulated pulse wave requires a pulse width of 1 nsec or less, but it is difficult that a PIN diode, which is conventionally used treats such a modulated pulse wave with narrow pulse width. In order to solve such a problem, it is an object to provide a pulse modulator, which outputs a modulated pulse wave with narrow pulse width and a pulse wave radar device, which can output a modulated pulse wave with narrow pulse width. In order to achieve this operation, the pulse modulator and the pulse wave radar device of the present invention differentiate a pulse from a pulse generating circuit so as to generate a differentiated wave with narrow width, and switch an oscillated wave from an oscillating circuit according to the differentiated wave so as to output a modulated pulse wave with narrow pulse width.

Abstract: At least one of a rise time and a fall time of a dielectric resonator oscillator are reduced. The dielectric resonator oscillator includes a dielectric resonator, a drive circuit for applying a resonance voltage to the dielectric resonator, a switch for applying a voltage required for generating the resonance voltage to the drive circuit, a switch for applying a ground voltage for stopping generation of the resonance voltage to the drive circuit, and a capacitor connected to a power terminal side that supplies a voltage, as seen from the switch, for removing noise generated by the drive circuit. If these switches are made conductive exclusively, oscillation can be stopped immediately by turning on the switch. Since the capacitor is in a charge storage state at all times, regardless of ON/OFF of the switch, the oscillation operation can be started immediately when the switch is turned ON.

Abstract: An electronic component module has a device-side module A and an antenna-side module B. The device-side module A is equipped with a first dielectric substrate 11 that is formed with a first transmission line 11a and a high-frequency device 13 that is mounted on the first dielectric substrate 11 and is connected to the first transmission line 11a. The antenna-side module B is equipped with a second dielectric substrate 12 that is laid on the first dielectric substrate 11 in such a manner that they are arranged in a lamination direction and that is formed with a second transmission line 12a that is electrically connected to the first transmission line 11, and an antenna element 14 that is provided on the second dielectric substrate 12 and electrically connected to the high-frequency device 13 via the second transmission line 12a and the first transmission line 11a.

Abstract: A modulated pulse wave requires a pulse width of 1 nsec or less, but it is difficult that a PIN diode, which is conventionally used treats such a modulated pulse wave with narrow pulse width. In order to solve such a problem, it is an object to provide a pulse modulator, which outputs a modulated pulse wave with narrow pulse width and a pulse wave radar device, which can output a modulated pulse wave with narrow pulse width. In order to achieve this operation, the pulse modulator and the pulse wave radar device of the present invention differentiate a pulse from a pulse generating circuit so as to generate a differentiated wave with narrow width, and switch an oscillated wave from an oscillating circuit according to the differentiated wave so as to output a modulated pulse wave with narrow pulse width.

Abstract: At least one of a rise time and a fall time of a dielectric resonator oscillator are reduced. The dielectric resonator oscillator includes a dielectric resonator, a drive circuit for applying a resonance voltage to the dielectric resonator, a switch for applying a voltage required for generating the resonance voltage to the drive circuit, a switch for applying a ground voltage for stopping generation of the resonance voltage to the drive circuit, and a capacitor connected to a power terminal side that supplies a voltage, as seen from the switch, for removing noise generated by the drive circuit. If these switches are made conductive exclusively, oscillation can be stopped immediately by turning on the switch. Since the capacitor is in a charge storage state at all times, regardless of ON/OFF of the switch, the oscillation operation can be started immediately when the switch is turned ON.

Abstract: An electronic component module according to the invention includes: a mounting substrate 11 including a shield layer 13 and on which a first cavity 14a and a second cavity 14b are formed; a first electronic component 16a positioned in the first cavity 14a and used in a first frequency band; a second electronic component 16b positioned in the second cavity 14b and used in a second frequency band; lid members 15 which seal the first cavity 14a and the second cavity 14b; and patch antennas 17 which transmit/receive radio waves in the frequency bands, the antennas connected to the electronic components 16; wherein the electronic components 16 are mounted on the mounting substrate 11 via a substrate component 19 having a higher heat resistance than the mounting substrate 11 and that the mounting substrate 11 is composed of a member having a lower dielectric constant that the substrate component 19.

Abstract: To achieve a purpose of accurately detecting a distance to a target even in a close range, a pulse wave radar device according to the present invention cuts off an output of a demodulation circuit so that no of receiving pulse may be detected, during a period when a transmitting pulse wave output from a transmitting antenna or a transmitting pulse output from a pulse generation circuit is leaking to a receiving antenna or a receiving circuit.

Abstract: An electronic component module includes: printed-circuit boards on which a shield layer is formed; a spacer positioned between the printed-circuit boards, the spacer equipped with a shielding feature which forms as partitions a first cavity and a second cavity between the printed-circuit boards; a first electronic component positioned in the first cavity and mounted on any one of the printed-circuit boards and used in a first frequency band; a second electronic component positioned in the second cavity and mounted on any one of the printed-circuit boards, the second electronic component used in a second frequency band; a patch antenna formed on the surface of the printed-circuit board opposite that on which the spacer is mounted, the antenna transmitting and receiving radio waves at least one of in the first and second frequency bands; and terminals formed on the surface of the printed-circuit board opposite that on which the spacer is mounted.

Abstract: An electronic component module includes a mounting substrate including a shield layer and on which a first cavity and a second cavity are formed. A first electronic component positioned in the first cavity is used in a first frequency band. A second electronic component positioned in the second cavity is used in a second frequency band. Lid members seal the first cavity and the second cavity. Patch antennas transmit/receive radio waves in the first and second frequency bands, the antennas being formed on a surface opposite to the electronic components mounting surface. And, connection terminals formed on the mounting substrate are electrically connected to the electronic components through transmission lines.

Abstract: An electronic component module has a device-side module A and an antenna-side module B. The device-side module A is equipped with a first dielectric substrate 11 that is formed with a first transmission line 11a and a high-frequency device 13 that is mounted on the first dielectric substrate 11 and is connected to the first transmission line 11a. The antenna-side module B is equipped with a second dielectric substrate 12 that is laid on the first dielectric substrate 11 in such a manner that they are arranged in a lamination direction and that is formed with a second transmission line 12a that is electrically connected to the first transmission line 11, and an antenna element 14 that is provided on the second dielectric substrate 12 and electrically connected to the high-frequency device 13 via the second transmission line 12a and the first transmission line 11a.

Abstract: An electronic component module includes: printed-circuit boards on which a shield layer is formed; a spacer positioned between the printed-circuit boards, the spacer equipped with a shielding feature which forms as partitions a first cavity and a second cavity between the printed-circuit boards; a first electronic component positioned in the first cavity and mounted on any one of the printed-circuit boards and used in a first frequency band; a second electronic component positioned in the second cavity and mounted on any one of the printed-circuit boards, the second electronic component used in a second frequency band; a patch antenna formed on the surface of the printed-circuit board opposite that on which the spacer is mounted, the antenna transmitting and receiving radio waves at least one of in the first and second frequency bands; and terminals formed on the surface of the printed-circuit board opposite that on which the spacer is mounted.

Abstract: An electronic component module according to the invention includes: a mounting substrate 11 including a shield layer 13 and on which a first cavity 14a and a second cavity 14b are formed; a first electronic component 16a positioned in the first cavity 14a and used in a first frequency band; a second electronic component 16b positioned in the second cavity 14b and used in a second frequency band; lid members 15 which seal the first cavity 14a and the second cavity 14b; and patch antennas 17 which transmit/receive radio waves in the frequency bands, the antennas connected to the electronic components 16; wherein the electronic components 16 are mounted on the mounting substrate 11 via a substrate component 19 having a higher heat resistance than the mounting substrate 11 and that the mounting substrate 11 is composed of a member having a lower dielectric constant that the substrate component 19.

Abstract: An electronic component module according to the invention includes: a mounting substrate 11 including a shield layer 13 and on which a first cavity 14a and a second cavity 14b are formed; a first electronic component 16a positioned in the first cavity 14a and used in a first frequency band; a second electronic component 16b positioned in the second cavity 14b and used in a second frequency band; lid members 15 which seal the first cavity 14a and the second cavity 14b; and patch antennas 17 which transmit/receive radio waves in the first and second frequency bands, the antennas being formed on a surface opposite to the electronic components mounting surface, and connection terminals 18 formed on the mounting substrate 11 and electrically connected to the electronic components 16 through transmission lines 12.

Abstract: A magnetostatic wave device including a ferrimagnetic film for exciting and propagating magnetostatic waves and a magnetic field generator for applying a magnetic field to the ferrimagnetic film. The magnetic field generator includes a permanent magnet and one pair of yokes that are magnetically connected to the permanent magnet and are opposite to each other with an air gap located between them. The air gap has the ferrimagnetic film received therein.

Abstract: A magnetostatic wave device of the invention comprises a ferrimagnetic film for exciting and propagating magnetostatic waves and a magnetic field generator for applying a magnetic field to the ferrimagnetic film. The magnetic field generator comprises a permanent magnet and one pair of yokes that are magnetically connected to the permanent magnet and are opposite to each other with an air gap located between them. The air gap has the ferrimagnetic film received therein. According to the first embodiment of the first aspect of the invention, the post and yokes are fixed together by the engagement of a protrusion formed on either one of the yokes and post into a recess formed in the other. According to the second embodiment of the first aspect, the post and yokes are fixed together by the engagement of a rod member into recesses formed in the respective post and yokes.

Abstract: A magnetostatic wave device including a magnetic garnet film which excites and propagates magnetostatic waves upon receiving electromagnetic waves, a magnetic field generator which applies a magnetic field to the magnetic garnet film, first and second ground conductors opposing each other and sandwiching the magnetic garnet film therebetween, and an RF signal feeder line disposed between the magnetic garnet film and the first ground conductors. The first ground conductor has an opposing surface opposed to one main surface of the magnetic garnet film. The second ground conductor has an opposing surface opposed to the other main surface of the magnetic garnet film. In the device,t.sub.1 .gtoreq.t.sub.R +5 .mu.mt.sub.2 .gtoreq.0 .mu.m, andt.sub.1 +t.sub.2 .ltoreq.500 .mu.m,where t.sub.1 is a distance between the opposing surface of the first ground conductor and the one main surface of the magnetic garnet film, t.sub.