Patent application number | Description | Published |
20080246684 | VARIABLE-DIRECTIVITY ANTENNA - A variable-directivity antenna according to the present invention includes at least three linear passive elements, which are arranged parallel to a Z-axis so as to surround a feed element. Each of those passive elements includes at least two element pieces, etc. that are arranged parallel to the Z-axis and switching elements, etc. of a first type. The passive element assembly further includes at least one switching element, etc. of a second type that makes two adjacent passive elements electrically continuous with each other when turned ON but electrically insulates them from each other when turned OFF. By turning ON and OFF the at least one switching element of the first type and the at least one switching element of the second type, the antenna can change its directivities. As a result, a linear variable-directivity antenna, which can change its radiation directivities within a vertical plane and of which the overall length in the longitudinal (or major-axis) direction does not increase excessively due to the presence of the passive elements, is realized. | 10-09-2008 |
20080272971 | WIDEBAND SLOT ANTENNA - A wideband slot antenna according to the present invention is a ¼ effective wavelength slot antenna in which a ground conductor | 11-06-2008 |
20080272972 | VARIABLE SLOT ANTENNA AND DRIVING METHOD THEREOF - A variable slot antenna includes: ground conductors | 11-06-2008 |
20080284670 | WIDE-BAND SLOT ANTENNA APPARATUS WITH STOP BAND - A slot antenna apparatus includes a grounding conductor having an outer edge including a first portion facing a radiation direction and a second portion other than the first portion, a one-end-open feed slot formed in the grounding conductor along the radiation direction such that an open end is provided at a center of the first portion, and a feed line including a strip conductor close to the grounding conductor and intersecting with the feed slot at at least a part thereof to feed a radio frequency signal to the feed slot. The slot antenna apparatus further comprises at least one one-end-open parasitic slot having an electrical length equivalent to one-quarter effective wavelength in a certain stop band, the parasitic slot having an open end at the second portion, and being formed in the grounding conductor so as not to intersect with the feed line. | 11-20-2008 |
20080284671 | DIFFERENTIALLY-FED VARIABLE DIRECTIVITY SLOT ANTENNA - With a differential feed line | 11-20-2008 |
20080291104 | WIDE-BAND SLOT ANTENNA APPARATUS WITH CONSTANT BEAM WIDTH - A slot antenna apparatus including: a grounding conductor having an outer edge including a first portion facing a radiation direction and a second portion other than the first portion, a one-end-open slot formed in the grounding conductor along the radiation direction such that an open end is provided at a center of the first portion, and a feed line including a strip conductor close to the grounding conductor and intersecting with the slot at least a part thereof to feed a radio frequency signal to the slot. The grounding conductor is formed to include at least one section at the second portion, the at least one section gradually approaches an axis passing through the slot and parallel to the radiation direction with increasing distance from the first portion. | 11-27-2008 |
20090002250 | DIFFERENTIALLY-FED VARIABLE DIRECTIVITY SLOT ANTENNA - With a differential feed line | 01-01-2009 |
20090021439 | VARIABLE SLOT ANTENNA AND DRIVING METHOD THEREOF - A variable directivity slot antenna includes: ground conductors | 01-22-2009 |
20090066596 | SLOT ANTENNA APPARATUS ELIMINATING UNSTABLE RADIATION DUE TO GROUNDING STRUCTURE - A slot antenna apparatus includes a grounding conductor having an outer edge including a first portion and a second portion, a one-end-opened slot formed in the grounding conductor along a radiation direction such that an open end is provided at a center of the first portion, a first feed line intersecting with the slot to feed radio-frequency signals, a second feed line connected to an external circuit, and a signal processing circuit including active elements and connected between the first and second feed lines and connected to the grounding conductor. The grounding conductor is configured to be symmetric about an axis parallel to the radiation direction and passing through the slot, and is provided with a grounding terminal on the axis of symmetry at the second portion. The grounding terminal is to be connected to a ground of the external circuit. | 03-12-2009 |
20090195460 | ENDFIRE ANTENNA APPARATUS WITH MULTILAYER LOADING STRUCTURES - A plurality of conductive strip elements compose multilayer loading structures on top and bottom surfaces of a dielectric transmission substrate, by which a part of intra-substrate transmission components of a electromagnetic wave are leaked out of the surfaces. Each multilayer loading structure includes a first conductive strip group of conductive strip elements within a first plane, and a second conductive strip group of conductive strip elements within a second plane, and the first and second conductive strip groups are formed to be capacitively coupled to each other. In each of the first and second conductive strip groups, the conductive strip elements are placed at intervals of a distance of a quarter or less of a reference adjacent distance, where the reference adjacent distance is defined as a distance for generating spatial harmonics of the electromagnetic wave on the surfaces of the dielectric transmission substrate. | 08-06-2009 |
20100328186 | ELECTROMAGNETIC WAVE FILTER APPARATUS WITHOUT DEGRADING RADIATION PATTERN OF ANTENNA - An electromagnetic wave filter apparatus includes: a shield conductor; a shield aperture provided in the shield conductor; a plurality of strip conductors, each of which is connected to the shield conductor at both ends thereof, and which divide the shield conductor into a plurality of apertures; and a plurality of stub conductors provided at intervals on each of the strip conductors. Each of the stub conductors prevents a current with a predetermined frequency from flowing through a corresponding strip conductor due to an electromagnetic wave with the predetermined frequency passing through the electromagnetic wave filter apparatus, and thus, the electromagnetic wave filter apparatus passes the electromagnetic wave with the predetermined frequency without exerting substantial influence on radiation of the electromagnetic wave with the predetermined frequency. | 12-30-2010 |
20110037322 | WIRELESS POWER TRANSMISSION UNIT AND POWER GENERATOR AND POWER GENERATION SYSTEM WITH THE WIRELESS POWER UNIT - A wireless power transmission unit that can increase the low output voltage of a power generating section effectively is provided. The wireless power transmission unit includes:
| 02-17-2011 |
20110084658 | ELECTRIC MACHINE AND POWER SUPPLY SYSTEM HAVING BATTERY PACK - An electric machine and a power supply system, in which a battery pack can be easily and safely replaced with another, and electric power can be transferred with high transfer efficiency. An electric machine of the present invention includes a driving electric motor, a battery pack for supplying electric power to the driving electric motor, and an energy transfer section for transferring electric energy output from the battery pack to the driving electric motor. The battery pack includes a first antenna for receiving electric power from a power supply source located outside the electric machine by coupling with a first resonant magnetic field generated by the power supply source, at least one secondary battery charged by the electric power received by the first antenna, an oscillator for producing radio-frequency power by DC power discharged from the secondary battery, and a second antenna for generating a second resonant magnetic field by the radio-frequency power. The energy transfer section includes a third antenna that couples with the second resonant magnetic field generated by the second antenna, and transfers the radio-frequency power received by the third antenna to the driving electric motor. | 04-14-2011 |
20110084782 | ELECTROMAGNETIC FILTER AND ELECTRONIC DEVICE HAVING SAME - The electromagnetic filter according to the present invention includes a shield opening | 04-14-2011 |
20110114400 | ELECTRIC POWER SUPPLY SYSTEM FOR VEHICLE - To stabilize the transmission characteristic of an electric power supply system for vehicle even when the vehicle being charged and powered by it shifts horizontally, a power transmitting antenna, which is arranged on the ground, and a power receiving antenna, which is arranged at the bottom of the vehicle, set up resonances at substantially the same resonant frequency and produce magnetic resonant coupling between them. When the power receiving antenna enters the zone in which the power transmitting antenna is located, power is transmitted to the vehicle. By setting the width of the power receiving antenna as measured in the vehicle's width direction to be larger than the length of the power receiving antenna as measured in the vehicle's traveling direction, the transmission characteristic can be stabilized. | 05-19-2011 |
20110114401 | ELECTRIC POWER SUPPLY SYSTEM FOR VEHICLE - To stabilize the transmission characteristic of an electric power supply system for vehicle even when the vehicle being charged and powered by it shifts horizontally, a power transmitting antenna, which is arranged on the ground, and a power receiving antenna, which is arranged at the bottom of the vehicle, set up resonances at substantially the same resonant frequency and produce magnetic coupling between them. When the power receiving antenna enters the zone in which the power transmitting antenna is located, power is transmitted to the vehicle. By setting H, which is the distance between the power transmitting and receiving antennas that face each other, so that H satisfies 0.11×W | 05-19-2011 |
20110241437 | WIRELESS POWER TRANSMISSION SYSTEM - The wireless power transmission system of this invention transmits power over a resonant magnetic field. The system includes a power-transmitting resonator | 10-06-2011 |
20110248573 | WIRELESS POWER TRANSMISSION SYSTEM - A wireless power transmission system is designed to transmit power between a power-transmitting resonator | 10-13-2011 |
20110266882 | POWER GENERATING APPARATUS, POWER GENERATING SYSTEM, AND WIRELESS ELECTRIC POWER TRANSMISSION APPARATUS - A power generator includes: a power generating section | 11-03-2011 |
20120001496 | WIRELESS POWER TRANSFER SYSTEM AND POWER TRANSMITTING/RECEIVING DEVICE WITH HEAT DISSIPATION STRUCTURE - A wireless power transfer system and power transmitting/receiving device according to the present invention include an antenna (resonator) | 01-05-2012 |
20120001497 | WIRELESS POWER TRANSMISSION SYSTEM - A wireless power transmission unit according to the present invention transmits power wirelessly from a power transmitting section | 01-05-2012 |
20120007435 | POWER GENERATOR AND POWER GENERATION SYSTEM - A power generator according to the present invention includes: a power generating section ( | 01-12-2012 |
20120086281 | WIRELESS POWER TRANSMISSION UNIT AND POWER GENERATOR WITH THE WIRELESS POWER TRANSMISSION UNIT - A wireless power transmission unit includes oscillators that convert DC energy into RF energy with a frequency f | 04-12-2012 |
20120086283 | POWER GENERATION SYSTEM AND POWER GENERATING UNIT - The power generation system includes first and second power generating units, each of which converts DC energy into RF energy and transmits the power wirelessly, a combining section, which combines the respective outputs of the power generating units together, and an oscillation phase control section, which reduces the phase difference between the RF energies supplied from the two power generating units and. The oscillation phase control section controls a phase difference between the RF energies supplied from the oscillators and belonging to the first and second power generating units and, respectively, so that first and second RF energies supplied from the first and second power generating units and are in phase with each other when combined together by the combining section. | 04-12-2012 |
20120187767 | POWER GENERATION SYSTEM, POWER GENERATING MODULE, MODULE FIXING DEVICE AND METHOD FOR INSTALLING POWER GENERATION SYSTEM - A power generation system includes power generating modules, and a module fixing device configured to fix the power generating modules. Each power generating module includes a power generating module body including a power generator that generates DC energy, and a power transmitter attached to the power generating module body. The power transmitter includes an oscillator that converts the DC energy into RF energy with a frequency f | 07-26-2012 |
20120274149 | WIRELESS POWER TRANSMISSION SYSTEM - A wireless power transmission system according to the present disclosure includes: a pair of antennas, between which power is transmissible wirelessly by resonant magnetic coupling at a frequency f | 11-01-2012 |
20130127257 | POWER GENERATING SYSTEM AND WIRELESS POWER TRANSMISSION SYSTEM - A power generating system includes: a plurality of power generating units for transmitting generated electric power by wireless via magnetic coupling between resonators; an AC combining section for combining AC energy output from AC converting and outputting sections of the power generating units and supplying the converted AC energy to an AC load; a DC combining section for combining DC energy output from DC converting and outputting sections of the power generating units and supplying the combined DC energy to a DC load; and an output control section for controlling an output of each power generating unit by transmitting a control signal to an output switching section of each power generating unit based on power consumption of at least one of the AC load and the DC load. | 05-23-2013 |
20130134795 | WIRELESS ELECTRIC POWER TRANSMISSION APPARATUS - A wireless electric power transmission apparatus as an embodiment of the present disclosure includes: two antennas | 05-30-2013 |
20130134796 | WIRELESS ELECTRIC POWER TRANSMISSION APPARATUS - A wireless electric power transmission apparatus as an embodiment of the present disclosure includes: two antennas having the ability to transmit electric power by a non-contact method via resonant magnetic coupling, one of the two antennas being a series resonant circuit, of which the resonant frequency is fs, the other antenna being a parallel resonant circuit, of which the resonant frequency is fp; an oscillator which is connected to one of the two antennas that transmits RF power; and a control section which controls a transmission frequency according to the magnitude of the electric power to be transmitted from one of the two antennas to the other. If a coupling coefficient between the two antennas is k, then fs and fp are set so as to satisfy the inequality fs/fp<−0.6074×k | 05-30-2013 |
20130134797 | WIRELESS ELECTRIC POWER TRANSMISSION APPARATUS - A wireless electric power transmission apparatus as an embodiment of the present disclosure includes: two antennas having the ability to transmit electric power by a non-contact method via resonant magnetic coupling, one of the two antennas being a series resonant circuit, of which the resonant frequency is fs, the other antenna being a parallel resonant circuit, of which the resonant frequency is fp; an oscillator which is connected to one of the two antennas that transmits RF power; and a control section which controls a transmission frequency according to the magnitude of the electric power to be transmitted from one of the two antennas to the other. fs/fp is set to be a value that is less than one. | 05-30-2013 |
20130264864 | WIRELESS POWER TRANSMISSION SYSTEM, POWER TRANSMITTING DEVICE, AND POWER RECEIVING DEVICE - A wireless power transmission system as an embodiment of the present disclosure transmits electric power by a non-contact method from a first inductor to a second inductor, or vice versa, via resonant magnetic coupling. The wireless power transmission system includes: the first inductor that has a center hole; the second inductor that is spaced apart from the first inductor and that is smaller in size than the hole of the first inductor; and a magnetic body member that is arranged on one side of the first inductor so as to face the second inductor and that covers at least a part of the first inductor. That at least a part of the first inductor reaches an outer edge of the first inductor from an inner edge thereof. | 10-10-2013 |
20140125142 | WIRELESS POWER TRANSFER SYSTEM FOR WIRELESSLY TRANSFERRING ELECTRIC POWER IN NONCONTACT MANNER BY UTILIZING RESONANT MAGNETIC FIELD COUPLING - There is provided a frequency controller apparatus for use in a wireless power transmitter apparatus configured to wirelessly transmit an inputted power from a power transmitting antenna that includes a first resonant circuit, toward a power receiving antenna that includes a second resonant circuit and is electromagnetically coupled to the power transmitting antenna at a predetermined transmission frequency. The frequency controller apparatus includes a controller for changing the transmission frequency during a power transfer, and the controller sets a decrease amount when decreasing the transmission frequency, so that the decrease amount is smaller than an increase amount when the transmission frequency is increased. | 05-08-2014 |
20140159501 | WIRELESS POWER TRANSMISSION SYSTEM CAPABLE OF CONTINUING POWER TRANSMISSION WHILE SUPPRESSING HEATUP OF FOREIGN OBJECTS - A power transmitting antenna includes a first resonant circuit including a power transmitting coil, a power receiving antenna includes a second resonant circuit including a power receiving coil. When the power transmitting antenna and the power receiving antenna are electromagnetically coupled to each other, the power transmitting antenna and the power receiving antenna have an odd-mode resonance frequency corresponding to an odd-mode resonant condition, and an even-mode resonance frequency corresponding to an even-mode resonant condition, and the even-mode resonance frequency is higher than the odd-mode resonance frequency. A wireless power transmitting apparatus is provided with a power transmitting circuit configured to generate high-frequency power at a variable frequency, and supply the high-frequency power to the power transmitting antenna. A control circuit sets the frequency of the high-frequency power generated by the power transmitting circuit to one of the odd-mode resonance frequency and the even-mode resonance frequency. | 06-12-2014 |
20140339915 | WIRELESS POWER TRANSMISSION SYSTEM - A power transmitting antenna includes a first resonant circuit including a power transmitting coil. A power receiving antenna includes a second resonant circuit including a power receiving coil. When the power transmitting antenna and the power receiving antenna are electromagnetically coupled to each other, the power transmitting antenna and the power receiving antenna have an odd-mode resonance frequency corresponding to an odd-mode resonant condition, and an even-mode resonance frequency corresponding to an even-mode resonant condition, and the even-mode resonance frequency is higher than the odd-mode resonance frequency. A wireless power transmitting apparatus is provided with a power transmitting circuit configured to generate high-frequency power at a variable frequency, and supply the high-frequency power to the power transmitting antenna. A control circuit sets the frequency of the high-frequency power generated by the power transmitting circuit to one of the odd-mode resonance frequency and the even-mode resonance frequency. | 11-20-2014 |