摘要:
An antenna system capable of receiving electromagnetic radiation having either right or left helical polarization, and either vertical or horizontal linear polarization includes an energy concentrator which concentrates energy at a focal point. A helical antenna is arranged in the proximity of the focal point. A first switch switches the helical antenna to a backfire mode of operation and a second switch switches the helical antenna to an end fire mode of operation. A control mechanism controls the switches to select the nature of the polarization.
摘要:
The present invention relates to a multi-sector radiating device intended to receive and/or transmit electromagnetic signals, comprising at least, arranged on a plane substrate: a first set of antennas, with: a first antenna, a second antenna, a third antenna, arranged in the opposite manner to the first antenna, a fourth antenna, arranged in the opposite manner to the second antenna, the antennas being longitudinal radiation slot type antennas, said antennas each presenting a bisector, wherein the radiating device comprises a switching circuit capable of activating one or more of the antennas, and notably all the antennas of the first set of antennas, -and in that the bisectors of the opposed antennas on the substrate are not combined.
摘要:
A microwave device of the slot-line type with a photonic band gap structure, including at least: a first substrate in a dielectric material having a first permittivity ∈r1, a second substrate in a dielectric material having a second permittivity ∈r2, and between the two substrates, a conductive layer in which at least one slot-line is engraved, with, on the face of the first and second substrates opposite the face in contact with the conductive layer, facing the slot-line, periodic metal patterns. A compact filtering structure is realized.
摘要:
A multi-antenna system feed device and a terminal including such a device is suggested.The device includes at least: a set of Wilkinson combiners, a branch of a combiner feeding an antenna, with the branches connected as inputs to a feed point; a set of switches connected between the antennas and the combiners with each switch switching a combiner branch to its corresponding antenna with the antenna being connected to the line when the switch is closed; A branch feeding an antenna, for instance, will be common to two consecutive combiners of the system. The suggested multi-antenna system feed device applies in particular to the extension of multi-antenna or sector antenna systems, used especially in devices with Multiple Inputs/Outputs of the MiMo type and more specifically to mesh network architectures.
摘要:
The present invention relates to photonic band gap antennas. This antenna comprises according to a plane of directions x, y, a radiating source and a photonic band gap structure constituted by parallel metal rods, the rods repeating themselves nx times in the direction x and ny times in the direction y. The height of the rods seen from the radiating source is increasing. The invention is able to control the radiation pattern of the antenna in the vertical plane.
摘要:
The present invention relates to a microwave device of the slot-line type with a photonic band gap structure, comprising at least: a first substrate in a dielectric material having a first permittivity εr1, a second substrate in a dielectric material having a second permittivity εr2, and between the two substrates, a conductive layer in which at least one slot-line is engraved, with, on the face of the first and second substrates opposite the face in contact with the conductive layer, facing the slot-line, periodic metal patterns. The invention enables a compact filtering structure to be realized.
摘要:
The invention relates to a monopole antenna with a radiating element mounted onto a base by means of a mast, of which the radiating element is formed from two conductive strands, in U, the length L of each strand being chosen such that ¼ λg≦L≦½ λg, λg being the wavelength in a strand at a central radiation frequency F0.
摘要翻译:本发明涉及一种具有通过桅杆安装到基座上的辐射元件的单极天线,其中辐射元件由U形成的两条导电绞线形成,每根绞线的长度L被选择为使得¼lambdag < L <=½lambdag,lambdag是中心辐射频率F0的链中的波长。
摘要:
The present invention relates to a portable compact antenna formed from a first dipole type element operating in a first frequency band and comprising a first and at least one second conductive arm, differentially supplied, the first arm or cold arm forming at least one cover for an electronic card and the second arm or hot arm being constituted by a U-shaped conductive element realized on an insulating substrate. Further, a radiating element with bends is realized between the branches of the U-shaped element and is dimensioned to operate in a second frequency band.
摘要:
The present invention relates to a source-antenna for transmitting/receiving electromagnetic waves comprising an array of n radiating elements (113, 114) operating in a first frequency band, means (20) with longitudinal radiation operating in a second frequency band, the array and the means with longitudinal radiation having a substantially common phase centre, the n radiating elements being arranged symmetrically about the longitudinal-radiation means, and each element (113, 114) of the array consisting of a radiating element of the travelling wave type.
摘要:
The invention relates to a method of producing a photonic bandgap structure on a slot-type microwave device which is produced on a metallized substrate. According to the invention, periodically-spaced patterns are formed on the surface of the aforementioned substrate opposite the surface comprising the slot. The invention is suitable for slot-type antennas.