Patent application number | Description | Published |
20100039187 | UNEQUAL THREE-WAY DIVIDER - An unequal three-way divider divides an input signal into three in-phase signals whose power ratio is different between a center and both ends. The unequal three-way divider includes an input terminal, and three output terminals for outputting a three-divided signal respectively, and three transmission lines branched from the input terminal are provided between the input terminal and the three output terminals. The transmission line connected to the center output terminal has a first transmission line which is connected in series and a second transmission line whose electrical length is ¼ wave length. Two transmission lines connected to the output terminals at both ends have a third transmission line which is connected in series and a fourth transmission line whose electrical length is ¼ wave length respectively. An absorption resistor is provided between a connection point between the first transmission line and the second transmission line and connection points between the third transmission lines and the fourth transmission lines respectively. An electrical length of the first transmission line or the third transmission line is ¼ wave length. | 02-18-2010 |
20100073250 | ANTENNA DEVICE - An antenna device provided in a space such as an aircraft, or the like at least a part of which is surrounded with a metal, and used in a radio communication system based on a MIMO system is disclosed. The radio communication system includes a server provided in a ceiling space of a cabin of the aircraft, a connection cable, a plurality of WAPs, and a plurality of client terminals provided near passenger's seats respectively. The antenna device is used as the antennas of WAPs, and has dipole array antenna including a plurality of antennas. The antenna device capable of ensuring a good communication quality even in any location in the space at least a part of which is surrounded with the metal can be provided. | 03-25-2010 |
20100231451 | ANTENNA DEVICE - An antenna device has a linear antenna element; a passive element section provided in proximity to the antenna element; and a control section that controls the passive element section. The passive element section has a linear line laid in parallel to the antenna element; and an impedance adjustment section that adjusts impedance of the passive element section. A compact antenna device capable of switching its directivity by means of electrical operation can be provided. | 09-16-2010 |
20100231453 | ARRAY ANTENNA APPARATUS INCLUDING MULTIPLE STEERABLE ANTENNAS AND CAPABLE OF AVOIDING AFFECTION AMONG STEERABLE ANTENNAS - A steerable antenna includes an radiating antenna element and parasitic antenna elements. Each of the parasitic antenna elements is provided with a pair of PIN diodes. On each of control lines connecting the PIN diodes to a controller, inductors are provided at predetermined intervals on portions of the control line electromagnetically coupled to another steerable antenna. The intervals for providing the inductors is set to such a length that substantially no resonance occurs in a section of the control line between the inductors at an operating frequency of the steerable antenna. | 09-16-2010 |
20100246496 | WIRELESS COMMUNICATION SYSTEM HAVING MIMO COMMUNICATION CAPABILITY AND HAVING MULTIPLE RECEIVING ANTENNAS TO BE SELECTED - Before start of streaming, a server apparatus obtains from client apparatuses their respective numbers of antenna combinations, determines a training time t | 09-30-2010 |
20110065391 | WIRELESS COMMUNICATION APPARATUS FOR CHANGING DIRECTIONAL PATTERN OF VARIABLE DIRECTIVITY ANTENNA ACCORDING TO VARIATIONS IN RADIO WAVE PROPAGATION ENVIROMENT - When a variable directivity antenna apparatus is controlled to form an initial composite directional pattern, RSSI is measured, and a weak electric field group or an intense electric field group is selected based on the measured RSSI. When the variable directivity antenna apparatus is controlled to form the composite directional patterns included in the selected composite directional pattern group, PER for each of the composite directional patterns is measured, and one composite directional pattern is selected from among the composite directional patterns included in the selected composite directional pattern group based on the measured PER, so that the variable directivity antenna apparatus is controlled to form the selected composite directional pattern. | 03-17-2011 |
20110102287 | VARIABLE DIRECTIVITY ANTENNA APPARATUS PROVIDED WITH ANTENNA ELEMENTS AND AT LEAST ONE PARASITIC ELEMENT CONNECTED TO GROUND VIA CONTROLLED SWITCH - A variable directivity antenna apparatus is configured to include a parasitic element, a plurality of antenna elements each provided to be away from the parasitic element by an electrical length of a quarter-wavelength, and a | 05-05-2011 |
20110143698 | DIRECTIONAL PATTERN DETERMINING METHOD CAPABLE OF QUICKLY SELECTING OPTIMUM DIRECTIONAL PATTERN - A plurality of directional patterns are classified into groups and stored in a directional pattern memory, such that among the plurality of directional patterns, the directional patterns strongly correlated with each other are classified into the same group, while the directional patterns weakly correlated with each other are classified into the different groups. One directional pattern is selected from each group in the directional pattern memory. One directional pattern is determined from the selected directional patterns, in accordance with a communication quality of signals each received when each one of the selected directional patterns is set for steerable antenna element. The determined directional pattern is set for the steerable antenna element. | 06-16-2011 |
20110193761 | ANTENNA APPARATUS INCLUDING FEEDING ELEMENTS AND PARASITIC ELEMENTS ACTIVATED AS REFLECTORS - An antenna apparatus includes an antenna element and a parasitic element provided on a first surface of a dielectric substrate, and an antenna element and a parasitic element provided on a second surface of the dielectric substrate. Each of the parasitic elements is provided at a position away from the antenna elements by a distance of one-fourth of an operating wavelength λ in communication. | 08-11-2011 |
20110217933 | WIRELESS COMMUNICATIONS APPARATUS AND WIRELESS COMMUNICATIONS METHOD - A wireless communications apparatus ( | 09-08-2011 |
20110222465 | COMMUNICATION TERMINAL, RELAY DEVICE, WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION CONTROL METHOD, AND PROGRAM - A communication terminal is connected to a wireless communication system in which an access point and a communication destination device are connected, and performs wireless communication with the communication destination device. Specifically, the communication terminal includes: a connection communication availability inquiring unit ( | 09-15-2011 |
20110267975 | COMMUNICATION APPARATUS, COMMUNICATION SYSTEM, COMMUNICATION METHOD, PROGRAM, AND INTEGRATED CIRCUIT - A communication apparatus ( | 11-03-2011 |
20120027056 | ARRAY ANTENNA APPARATUS INCLUDING MULTIPLE STEERABLE ANTENNAS AND CAPABLE OF ELIMINATING INFLUENCE OF SURROUNDING METAL COMPONENTS - An antenna unit is provided with: steerable antennas, each having one active antenna element and two parasitic antenna element; and metal blocks. Each of the active antenna elements is associated with at least one of the metal blocks such that the metal block is disposed remote from the active antenna element by a predetermined distance and operates as a reflector for the active antenna element. Each of the parasitic antenna elements is provided with a switching circuit for changing an electrical length of the parasitic antenna element, and the parasitic antenna element operates as a reflector for an active antenna element of the same steerable antenna as the parasitic antenna element by changing the electrical length using the switching circuit. | 02-02-2012 |
20120028596 | WIRELESS COMMUNICATION APPARATUS CAPABLE OF RAPIDLY CHANGING DIRECTIONAL PATTERNS OF MULTIPLE STEERABLE ANTENNA APPARATUSES - A directional pattern table memory stores combined directional pattern groups in each of which combined directional patterns are ordered by different predetermined priority according to a different radio propagation environment. A controller computes a communication performance expected value based on RSSIs for when an initial combined directional pattern is set on steerable antenna apparatuses; selects one combined directional pattern group based on relative strengths of RSSIs; and according to the priority, sequentially sets combined directional patterns of the selected one combined directional pattern group, on the steerable antenna apparatuses, computes a communication performance value based on a PHY rate and a PER at each of sequential settings, and performs communication using a combined directional pattern with a communication performance value that first exceeds the communication performance expected value. | 02-02-2012 |
20120075156 | VARIABLE DIRECTIONAL ANTENNA DEVICE - A feed element is configured to include a first antenna element having a first width, a dual-band forming inductor, and a second antenna element having a second width wider than the first width, where the first antenna element, the dual-band forming inductor, and a second antenna element are connected in series. The inductor is formed in a meander shape which has a trapezoidal envelope external shape to have a width formed to widen from the first width of a portion connected to the first antenna element toward a portion connected to the second antenna element. | 03-29-2012 |
20120122414 | WIRELESS COMMUNICATION APPARATUS CHANGING RADIATION PATTERNS OF ANTENNA APPARATUSES - When controlling antenna apparatuses to select a predetermined combination from among a plurality of combinations of antenna elements, a controller measures RSSIs of wireless signals received by the antenna apparatuses, and sets a detection packet interval and a changeover threshold based on measured RSSIs with reference to a detection packet interval table and a changeover threshold table. Then, the combination of the antenna elements is changed over by using the set detection packet interval and the changeover threshold. | 05-17-2012 |
20120127053 | VARIABLE DIRECTIVITY ANTENNA APPARATUS INCLUDING PARASITIC ELEMENTS HAVING CUT PORTION OF RECTANGULAR SHAPE - A feed element is configured to include a first antenna element having a first width, a dual-band forming inductor, and a second antenna element having a second width wider than the first width, where the first antenna element, the dual-band forming inductor, and a second antenna element are connected in series. The inductor is formed in a meander shape which has a trapezoidal envelope external shape to have a width formed to widen from the first width of a portion connected to the first antenna element toward a portion connected to the second antenna element. Cut portions each having a rectangular shape are further formed at corner portions of another ends of the parasitic elements, respectively. | 05-24-2012 |
20120274517 | ANTENNA APPARATUS RESONATING IN FREQUENCY BANDS IN INVERTED F ANTENNA APPARATUS - In an inverted F pattern antenna apparatus having a first antenna element and an electrical length of a quarter wavelength of a first resonance frequency, the inverted F pattern antenna apparatus having two resonance frequencies is configured to include a third antenna element and a second antenna element at an end portion of the first antenna element, and setting a length having an electrical length obtained by adding the electrical length of a further provided antenna element to the electrical length of the inverted F pattern antenna apparatus to the electrical length of a quarter wavelength of a second resonance frequency to achieve resonance at the second resonance frequency. In addition, a loop antenna is configured to include the first, third and second antenna elements and the grounding antenna element by capacitively coupling another end of the third antenna element to the grounding antenna element. | 11-01-2012 |
20130063318 | DUAL-BAND INVERTED-F ANTENNA APPARATUS PROVIDED WITH AT LEAST ONE ANTENNA ELEMENT HAVING ELEMENT PORTION OF HEIGHT FROM DIELECTRIC SUBSTRATE - An antenna apparatus includes firs and second antenna elements. The first antenna element operates as a loop antenna that resonates at a first wavelength, and the antenna apparatus operates as an inverted-F antenna that resonates at a second wavelength. The first antenna elements includes a first element portion formed to have a predetermined height from a surface of a dielectric substrate, and the second antenna element includes a second element portion which is formed to be substantially parallel to the first element portion at least at a predetermined distance apart from the first antenna element. | 03-14-2013 |