摘要:
The invention concerns a frequency multiband antenna comprising: a photonic bandgap material (142) having at least one band gap, one single periodicity defect (156) of the bandgap material so as to produce several narrow bandwidths within said at least one band gap of said bandgap material, and an excitation device (160, 162) capable of transmitting and/or receiving electromagnetic waves within the narrow bandwidths.
摘要:
The invention relates to a communication device for arranging in an aircraft cabin, said device comprising: an antennae assembly designed so as to emit and receive communication data in a first frequency band of a communication network and to receive localisation data in a second frequency band of a localisation network, said antennae assembly comprising an antenna having a pattern of radiation revolving about a main axis, the radiation being at its maximum in the direction of said main axis, and a system for restraining the radiation, designed to limit the radiation outside said antenna axis; a modem connected to the antenna, designed so as to allow the emission and the reception of communication data via a communication network; and a localisation data receiver.
摘要:
The invention relates to an antenna for transmitting or receiving electromagnetic waves at a working frequency fτ, that comprises a resonator with a filtering (49) coating that covers the major portion of the upper face of a reflector (22) located inside a cavity (36), said coating (40) being capable of removing all the electromagnetic waves having a frequency fτ and propagating in a direction parallel to the upper face of the reflector, without removing all the electromagnetic waves having a frequency fτ and propagating in a direction perpendicular to the upper face of the reflector.
摘要:
The invention concerns a multibeam antenna comprising: a photonic bandgap material (20) having at least one band gap; at least on e periodicity defect so as to produce at least one narrow bandwidth inside said at least one band gap of said photonic bandgap material, and excitation elements (50 to 43) for enabling electromagnetic waves to be received inside said at least one narrow bandwidth. The excitation elements are mutually arranged so as to generate radiating spots (46 to 49) partly overlapping on one surface of the photonic bandgap material.
摘要:
The invention concerns a microstrip antenna comprising a series of wires (210, 220, 230, 240) located substantially in a main common plane, each of the wires being fed by a common conductor wire (100), characterized in that each of said wires (210, 220, 230, 240) describes an initial segment (312) which is radial relative to a geometrical axis (X) perpendicular to the main plane, then each of the wires extends along an arc (214) centered on said geometrical axis (X), then describes another substantially radial segment (216), oriented towards the geometrical axis (X), hence along a radial segment (212) of the neighbouring strip without touching it.
摘要:
The invention concerns a system comprising a device for focusing electromagnetic waves, and a multiple-beam antenna. The antenna comprises: a photonic bandgap material (20) having at least one band gap, at least one periodicity defect (36) of the photonic bandgap material so as to produce at least one narrow bandwidth within said bandgap material, and excitation elements (40 to 43) for transmitting and/or receiving electromagnetic waves within said at least one narrow bandwidth, said elements being arranged relative to one another so as to produce overlapping radiating spots.
摘要:
The invention concerns a multibeam antenna comprising: a photonic bandgap material (20) having at least one band gap; at least on e periodicity defect so as to produce at least one narrow bandwidth inside said at least one band gap of said photonic bandgap material, and excitation elements (50 to 43) for enabling electromagnetic waves to be received inside said at least one narrow bandwidth. The excitation elements are mutually arranged so as to generate radiating spots (46 to 49) partly overlapping on one surface of the photonic bandgap material.