Patent application number | Description | Published |
20080284658 | Antenna module - An antenna module includes a substrate; a ground element disposed on the substrate; a first antenna element disposed on the substrate; and a second antenna element disposed on the substrate. The first antenna element and the second antenna element are, respectively, capable of transmitting radio waves having a first polarization direction and a second polarization direction unparallel to each other. A spacing between a perimeter of the ground element and the first antenna element increases as a function of increasing distance from the second antenna element. A spacing between the perimeter of the ground element and the second antenna element increases as a function of increasing distance from the first antenna element. | 11-20-2008 |
20090295655 | Planar antenna, communication apparatus and mounting method of planar antenna - A planar antenna is disclosed. The planar antenna includes: a radiator element having a wideband resonant characteristic; and a parasitic element having a planar shape. The parasitic element has a first side, a second side, a third side and a fourth side. Each of the first side and the second side is parallel to a direction of an electric current to be excited in the radiator element. The first side is located closer to the radiator element than the second side is. The first side is shorter than the second side. The third side connects one ends of the first side and the second side. The fourth side connects the other ends of the first side and the second side. A region between the third and fourth sides tapers in a direction from the second side toward the first side. | 12-03-2009 |
20090295676 | Communication apparatus - A communication apparatus communicating other apparatuses includes: a switch for switching between a vertical polarized antenna and a horizontal polarized antenna; a communication device for transmitting and receiving the electric wave via one of the antennas, which is selected by the switch; a monitor for monitoring a relative distance between the apparatus and other apparatuses; and a controller for controlling the switch such that the switch selects the vertical polarized antenna when the relative distance is equal to or larger than a distance threshold, and the switch selects the horizontal polarized antenna when the relative distance is smaller than the distance threshold. The distance threshold is larger than a distance between the apparatus and a dip point. | 12-03-2009 |
20100045547 | On-vehicle film antenna - An on-vehicle film antenna is constructed with a loop antenna and a monopole antenna and attached to a vehicle windshield. The loop antenna has a first element set in length to correspond to a first radio wave of a first frequency band. One end of the first element is connected to a power supply near a border section between a vehicle chassis and the vehicle windshield, and the other end of the first element is connected to the vehicle chassis. The monopole antenna has a second element set in length to correspond to a second radio wave of a second frequency band. One end of the second element is connected to the power supply near the border section in common with the one end of the first element, and the other end of the second element is disconnected from the vehicle chassis. | 02-25-2010 |
20100302113 | In-vehicle antenna device - An in-vehicle antenna device includes: a dielectric element having a front surface, first and second side surfaces and a rear surface and including a power supply point on both the first and second side surfaces, a first conductive surface on the first side surface, a second conductive surface on the second side surface, and a third conductive surface on the rear surface; and an antenna element including a base element coupled with the power supply point at one corner of the front surface and a branch element connected to the base element and having an end. A part of the branch element moves apart from one of the first and second conductive surfaces as it goes from the base element to the one end of the branch element. The front surface is attached to a windshield of a vehicle. | 12-02-2010 |
20100303127 | Vehicle compartment wireless communications apparatus - It is determined whether each of several subcarriers has an adequate propagation characteristic in a first horizontally polarized wave antenna. Of the several subcarriers, a subcarrier, which is determined to have an adequate propagation characteristic in the first horizontally polarized wave antenna, is assigned with transmission data. A transmission signal containing the transmission data is thereby transmitted from the first horizontally polarized wave antenna. In addition, of the several subcarriers, a subcarrier, which is determined not to have an adequate propagation characteristic in the first horizontally polarized wave antenna, is also assigned with transmission data in either a second horizontally polarized wave antenna or a vertically polarized, wave antenna. A transmission signal containing the transmission data is thus transmitted from the second horizontally polarized wave antenna or the vertically polarized wave antenna. | 12-02-2010 |
20110204716 | OPERATION CONTROL SYSTEM - In an operation control system, when a selection manipulation for blinking one of turn lamps is inputted using an in-vehicle combination switch, a frequency signal corresponding to the selection manipulation is outputted from a signal oscillation section to a signal transformation section via a common control line. In addition, the signal transformation section causes, out of two individual signal lines, an individual signal line corresponding to the inputted frequency signal to be in an active state. One of driver sections blinks one of turn lamps corresponding to the individual signal line being in the active state. It is noted that a drive control section stops temporarily operations of the turn lamps while both the input signal lines are in the active state. | 08-25-2011 |
20110205035 | POWER LINE COMMUNICATION SYSTEM - A power line communication system includes a plurality of communication nodes, a communication line coupling the communication nodes, a direct current power line coupling a connection point of the communication line with one of a positive terminal of a battery and a supply terminal of a load, and a capacitor coupled between the direct current power line and a ground. The communication nodes communicate with each other by superimposing a high frequency signal having a wavelength of λ to the communication line. The capacitor is coupled with the direct current power line at a position where a line length from the connection point is (n×λ/2+λ/4), where n is a natural number including zero. | 08-25-2011 |
20110307123 | ELECTRIC POWER LINE COMMUNICATION SYSTEM FOR VEHICLE - An in-vehicle electric power line communication system includes: a pair of direct current electric power lines functioning as electrically equilibrated communication lines; multiple communication devices communicating with each other via the communication lines; and an ignition switch. Each communication device applies a high frequency signal to the communication lines so that equilibrium communication is performed. One communication line starts and stops supplying direct current electricity according to a status of the ignition switch. Each communication device detects an electric potential of the one communication line or a potential difference between the direct current electric power lines. Each communication device determines the operation status of the vehicle based on the electric potential or the potential difference. Each communication device performs the equilibrium communication according to the operation status of the vehicle. | 12-15-2011 |
20120242552 | MULTI-BAND ANTENNA - A multi-band antenna includes two conductive wirings and unit circuits cascaded along the conductive wirings. Each unit circuit includes a communication unit, a first capacitor and a second inductor. The communication unit connects between the conductive wirings through a first inductor and a second capacitor connected in series with the first inductor. The first capacitor and the second inductor are inserted in at least one of the conductive wirings. The second inductor is connected in parallel with the first capacitor. Alternatively, the unit circuit includes a communication unit connecting between the conductive wirings through a first inductor, and a first capacitor inserted in at least one of the conductive wirings. The first inductor, the first capacitor, a third capacitor disposed between the conductive wirings, and a third inductor disposed on at least one of the conductive wirings satisfy a relationship expressed by the expression 2. | 09-27-2012 |
20120299794 | ANTENNA APPARATUS - A wireless communication module is arranged such that a radio frequency circuit board stands vertically on a first earth plate. The radio frequency circuit board includes first and second radio frequency transmission and reception circuits at both end portions, respectively. The radio frequency circuit board includes a second earth plate serving as a grounding electric potential of the radio frequency transmission and reception circuits. Feed lines from the radio frequency transmission and reception circuits are connected to the first earth plate, respectively. Ground lines of the feed from the radio frequency transmission and reception circuits, respectively, are connected to the second earth plate. Thus, vertical exciting currents flow at both end portions of the second earth plane, enabling transmission and reception of vertical polarization waves. | 11-29-2012 |
20130307745 | ANTENNA FOR WIRELESS APPARATUS - An antenna for wireless apparatus which is placed in the vicinity of a conductive object is disclosed. The antenna for wireless apparatus includes a GND plate, a conductive plate parallel to the GND plate, two antenna elements, and two raising conductive plates. Each of the antenna elements includes a short-circuit conductive body and a radiation plate placed at an edge of the short-circuit conductive body. The two antenna elements are placed substantially parallel to a side surface of the conductive object with a distance of a half wavelength of a radio wave to be transmitted and received. The two raising conductive plates are placed close to the two antenna elements respectively and raise the conductive plate from the GND plate to a predetermined height. | 11-21-2013 |
20140062808 | VEHICULAR ANTENNA APPARATUS - A vehicular antenna apparatus includes a substrate, a circuit portion, a case, and a heat transfer path. The substrate has an antenna portion. The circuit portion is mounted on the substrate and configures at least a part of a wireless communication circuit electrically coupled with the antenna portion. The case is made of resin material and configures a protruded portion of an outer surface of a vehicle. The substrate and the circuit portion are arranged in the case. The heat transfer path is arranged between the circuit portion and the case, and has a thermal conductivity higher than air. The circuit portion is electrically coupled with the antenna portion by a solid phase diffusion bonding. | 03-06-2014 |
20150054707 | ANTENNA APPARATUS - An antenna apparatus includes a conductive ground pattern formed on a planar substrate and a linear antenna element electrically connected with the ground pattern. The antenna element includes a base end portion, a front end portion, and a feeding point. The antenna element is parallel to the substrate, and the base end portion is connected with an end portion of the ground pattern so that the antenna element is away from the ground pattern. An auxiliary ground pattern having the same potential with the ground pattern is disposed on the substrate between the ground pattern and the antenna element along a side including the end portion. | 02-26-2015 |
20150061964 | ANTENNA DEVICE - An antenna device includes a first antenna element and a second antenna element. The first antenna element operates at a first predetermined frequency band. The second antenna element operates at a second predetermined frequency band that is different from the first predetermined frequency band. The first antenna element includes a base end portion, a front end portion, a folded portion, a first side portion disposed between the base end portion and the folded portion, and a second side portion disposed between the folded portion and the front end portion. A direction of a current vector in the first side portion is equal to a direction of a current vector in the second side portion. The second antenna element is disposed adjacent to the first antenna element. | 03-05-2015 |
20150065067 | VEHICLE COMMUNICATION APPARATUS - A vehicle communication apparatus includes an antenna module, a wireless communication device placed and physically separated from the antenna module, a first communication cable and a second communication cable. The antenna module includes a first antenna and a second antenna. The wireless communication device includes a first antenna-connecting sending portion, a second antenna-connecting receiving portion, an adjustment portion, a memory, and a loss amount calculation portion calculating a loss amount by the first communication cable. The adjustment portion adjusts the sending power of the sending wave radiated from the first antenna based on the loss amount calculated by the loss amount calculation portion, and equalizes the sending power with a reference power. | 03-05-2015 |
20150077305 | ANTENNA DEVICE - An antenna device mounted on a roof surface of a vehicle roof includes a ground plate disposed on the roof surface, an antenna ground, a first antenna element, and a second antenna element. The antenna ground is disposed on a plane perpendicular to the ground plate apart from a ground plate surface by a predetermined distance in a direction perpendicular to the ground plate surface. The first antenna element, whose first base end portion is connected to a first predetermined position of the antenna ground, extends from the first base end portion to a first front end portion in a direction moving away from the antenna ground. The second antenna element, whose second base end portion is connected to a second predetermined position of the antenna ground, extends from the second base end portion to a second front end portion in a direction moving away from the antenna ground. | 03-19-2015 |
20150097738 | ANTENNA SYSTEM AND ANTENNA UNIT - An antenna system includes a case, an antenna configured for a first communication system, an inside orthogonal antenna configured for a polarization diversity communication system, and an outside orthogonal antenna configured for the polarization diversity communication system. The antenna for the first communication system and the inside orthogonal antenna are disposed inside the case such that a main radiation polarization plane of the inside orthogonal antenna is orthogonal to a main radiation polarization plane of the antenna for the first communication system. The outside orthogonal antenna is disposed outside the case such that a main radiation polarization plane of the outside orthogonal antenna is orthogonal to the main radiation polarization plane of the inside orthogonal antenna. | 04-09-2015 |
20150099475 | WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus includes a first wireless communication unit performing a first type wireless communication and a second wireless communication unit performing a second type wireless communication, an interference determination portion, and an interference suppression portion. The interference determination portion determines whether the first wireless communication unit is in an interference state based on a radio wave reception state of the first wireless communication unit acquired when the second wireless communication unit is in a transmitting state. In the interference state, radio waves received by the first wireless communication unit are interfered by the radio waves transmitted from the second wireless communication unit. The interference suppression portion executes an interference suppression process in response to the interference state by suppressing the radio waves transmitted from the second wireless communication from interfering with the radio waves received by the first wireless communication unit. | 04-09-2015 |
20150124892 | RADIO COMMUNICATION SYSTEM AND METHOD - A radio communications system includes a communication radio and an antenna module positioned external to the communication radio. An antenna cable connects the radio and the antenna module. The radio superposes a power voltage for operating the antenna module on a signal line of the antenna cable and transmits to the antenna module through the antenna cable a control signal that controls a gain of a transmission amplifier and duplexers while the transmission signal is not transmitted therethrough. In such manner, a control of the antenna module is enabled without affecting the transmission signal. | 05-07-2015 |
20150229020 | VEHICLE-MOUNTED ANTENNA DEVICE - A vehicle-mounted antenna device includes a base, a board, a circuit section, and a housing. The base is mountable on a roof of a vehicle. The board has an antenna element section and is stood on the base. The circuit section is implemented on the board and serves as at least part of a wireless communication circuit electrically connected to the antenna element section. The housing is made of a resin material and forms a projection of an outer shape of the vehicle. The board and the circuit section are located in space formed by the base and the housing. A heat transfer path having a thermal conductivity higher than that of air is formed between the circuit section and the housing without passing the base. | 08-13-2015 |
20150229021 | VEHICLE-MOUNTED ANTENNA DEVICE - A vehicle-mounted antenna device includes a base, a board, a circuit section, and a housing. The base is mountable on a roof of a vehicle. The board has an antenna element section and is stood on a surface of the base. The circuit section serves as at least part of a wireless communication circuit electrically connected to the antenna element section. The housing is made of a resin material and forms a projection of a vehicle outer shape. The board and the circuit section are located in space formed by the base and the housing. The board is stood on the surface of the base so that a first direction perpendicular to the surface of the base differs from a second direction equal to a thickness direction of the board. The circuit section implemented on the board at a position away from the base in the first direction. | 08-13-2015 |
20150229500 | WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus includes multiple antennas, a receiver for performing diversity reception using the antennas, a transmitter, a selector circuit connected to the antennas, a divider, and a phase shifter. The divider is located in a transmission line which connects the selector circuit to the transmitter and distributes a signal outputted from the transmitter among the antennas during transmission. The phase shifter is located in at least one of multiple transmission lines, each of which connects the divider to a corresponding one of the antennas. | 08-13-2015 |