摘要:
An On Board Equipment (OBE) suitable for mounting on a vehicle comprises an OBE antenna connected to an OBE transmit/receive unit. The OBE antenna is arranged to receive a signal from a station via a first wireless communication link. The signal comprises at least one traffic information message from the station. The OBE is arranged to convert the traffic information message for transfer to an audio output through at least one speaker in an existing audio system of the vehicle wherein said transfer of the traffic information message to the existing audio system is arranged to be performed via a second wireless communication link. The traffic information message is arranged to be picked up by standard receiving means of the existing audio system and to be delivered as a voice message on said speakers through a prioritized channel of the existing audio system.
摘要:
An On Board Equipment (OBE) suitable for mounting on a vehicle comprises an OBE antenna connected to an OBE transmit/receive unit. The OBE antenna is arranged to receive a signal from a station via a first wireless communication link. The signal comprises at least one traffic information message from the station. The OBE is arranged to convert the traffic information message for transfer to an audio output through at least one speaker in an existing audio system of the vehicle wherein said transfer of the traffic information message to the existing audio system is arranged to be performed via a second wireless communication link. The traffic information message is arranged to be picked up by standard receiving means of the existing audio system and to be delivered as a voice message on said speakers through a prioritized channel of the existing audio system.
摘要:
An antenna structure for the transmission and processing of electromagnetic microwave signals is manufactured by making holes in a number of electrically-conductive plates by a mechanical or chemical process in order to create cut-outs in the form of through holes with electrically-conductive edge surfaces. For each plate, the holes have a defined position and length from one side of each plate to its other side. The plates with the holes are stacked in a defined relative position, and the sides of the plates are fixed to each other at least around the edge surfaces formed. In this way, a number of holes are given electrically-conductively limited surfaces in the form of the edge surfaces and also the parts of the side surfaces of the surrounding plate facing the holes.
摘要:
A method of determining a reference calibration setting for an adaptive optics system (1) comprising a detecting device (8) for detecting light from an object (5); and at least one controllable wavefront modifying device (9) arranged such that light from the object (5) passes via the wavefront modifying device (9) to the detecting device (8). The method comprises the steps of: arranging (100) a light-source between the object (5) and the wavefront modifying device (9) to provide a reference light beam to the detecting device (8) via the wavefront modifying device; for each of a plurality of orthogonal wavefront modes of the wavefront modifying device: controlling (101) the wavefront modifying device to vary a magnitude of the orthogonal wavefront mode over a predetermined number of magnitude settings; acquiring (102) a series of readings of the detecting device, each reading corresponding to one of the magnitude settings; determining (103) a quality metric value indicative of an information content of the reading for each reading in the series of readings, resulting in a series of quality metric values; and determining (106) a reference parameter set for the wavefront modifying device corresponding to an optimum quality metric value based on the series of quality metric values.
摘要:
A waveguide arrangement having a longitudinal extension, along which an electromagnetic wave may propagate, and comprising at least one waveguide part and a feeding arrangement which is arranged for feeding said waveguide part with a first polarization and a second polarization, said polarizations being mutually orthogonal. The feeding arrangement comprises a dielectric carrier material comprising a first feeding conductor, feeding the first polarization and a second feeding conductor, feeding the second polarization, where the first polarization is excited by means of first excitation means fed by said first feeding conductor and the second polarization is excited by means of second excitation means fed by said second feeding conductor, where at least one excitation means is a symmetrical structure with respect to the longitudinal extension.
摘要:
The present invention discloses a repeater antenna comprising a plurality of radiation elements arranged in a first electrically conducting layer or plane. The repeater antenna also comprises a ground plane spaced apart from the radiation elements by a layer of dielectric material, and the radiation elements are each given such an extension (L1, L2, L3) and such a distance (D12, D23) to neighboring radiation elements that an incident electromagnetic wave will reflect from the repeater antenna at an angle (α2) that by a predetermined amount will be greater or smaller than the incident angle (α2) of the electromagnetic wave. The repeater antenna is plane, and can be either curved or flat.
摘要:
An arrangement for providing communication between a radio antenna and a radio base station in a cellular communication system. A waveguide is configured to connect the radio base station to the antenna. The waveguide may be connected directly or indirectly to the radio base station and/or the antenna. The waveguide is configured with a number of compartments, each compartment acting as a waveguide for a particular signal. The arrangement is thus able to convey a large number of signals, for example, for sector antennas of dual polarization type and for more than one frequency band.
摘要:
Example embodiments relate to a side door for a motor vehicle, comprising at least one hinge device for pivotal connection of the side door to one of the body posts of the motor vehicle, the hinge device including a first hinge half adapted to be fastened to one of the body posts of the motor vehicle, a second hinge half which by means of a joint is fastened to a first side of the side door, a hinge pin which pivotally connects the first hinge half to the second hinge half in such a manner that the side door is pivotable about a vertical axis, defined by the hinge pin, between an open and a closed position, the joint including at least one threaded bolt which extends horizontally, from the first side of the side door, through a through hole in the second hinge half and through a through hole in the side door, and projects from a second side of the side door, a threaded nut element arranged around the through hole on the second side of the side door and in threaded engagement with the threaded bolt. The side door is characterised in that the nut element extends through the through hole in the side door and projects a small distance from the first side of the side door into the through hole in the second hinge half.
摘要:
The present invention relates to a wireless communication device and an antenna arrangement in such a device, where a loop antenna element (18) comprises: a first section (20) provided in and extending a length in first plane, a second section (22) spaced from, provided in and extending a length in the first plane, a third section (24) in a second plane parallel to the first plane, aligned with the first and second sections, and a fourth (26) and a fifth section (28) interconnecting antenna sections in the first and second planes. The sections form a three-dimensional structure having a substantial two-dimensional extension in at least one of the first and second planes. The second section extends along the same line as the first section or has a curvature, which is a continuation of the curvature of the first section. Thereby a small wideband antenna requiring a small ground plane is obtained.
摘要:
The present invention relates to a broadband non-resonant antenna device for wireless transmission of information using electromagnetic signals, comprising a metal sheet layer, forming a plane, with a slotline that comprises a first part and a second part. The side of the second part that is the most distant from the first part transcends into a widening open-ended tapered slot in the metal sheet layer. The device additionally comprises a feeding line in the metal sheet layer. The feeding line comprises a feeding part, with a first end and a second end, and gaps separating the feeding part from the surrounding metal sheet layer by a certain distance, where the slotline is intersected by the feeding line.