WO2020131123A1 - Antenne ayant des anneaux concentriques et procédé de fonctionnement associé pour équilibrer au moins partiellement de manière passive des modes de rayonnement - Google Patents

Antenne ayant des anneaux concentriques et procédé de fonctionnement associé pour équilibrer au moins partiellement de manière passive des modes de rayonnement Download PDF

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Publication number
WO2020131123A1
WO2020131123A1 PCT/US2018/067325 US2018067325W WO2020131123A1 WO 2020131123 A1 WO2020131123 A1 WO 2020131123A1 US 2018067325 W US2018067325 W US 2018067325W WO 2020131123 A1 WO2020131123 A1 WO 2020131123A1
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WO
WIPO (PCT)
Prior art keywords
concentric rings
radiators
antenna
lie
plane
Prior art date
Application number
PCT/US2018/067325
Other languages
English (en)
Inventor
David Robert HENDRY
Original Assignee
Nokia Technologies Oy
Nokia Usa Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Technologies Oy, Nokia Usa Inc. filed Critical Nokia Technologies Oy
Priority to PCT/US2018/067325 priority Critical patent/WO2020131123A1/fr
Publication of WO2020131123A1 publication Critical patent/WO2020131123A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/44—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element
    • H01Q3/446—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element the radiating element being at the centre of one or more rings of auxiliary elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0464—Annular ring patch

Definitions

  • An example embodiment relates generally to antennas and associated methods of operating antennas and, more particularly, to an antenna having a plurality of concentric rings as well as an associated method of operation for at least partially parasitically balancing the radiating modes of the antenna.
  • An active antenna array includes a plurality of antenna elements and a plurality of ports through which the respective antenna elements are fed.
  • an antenna array may include dual-polarization antenna elements positioned with a half-wavelength spacing therebetween. Each polarization of the dual-polarization antenna elements of an antenna array allows an independent channel to be transmitted and received, thereby effectively doubling the bandwidth of the antenna array.
  • An active antenna array having multiple ports associated with the plurality of antenna elements may offer increased radio link capacity. While increased radio link capacity is useful for a variety of applications, at least some antenna arrays have a compact design such that the antenna elements and the associated ports are located close to one another. As a result, the port-to-port isolation of such antenna arrays having a compact form factor may be reduced which may lead to a decreased signal-to-interference ratio and, as a result, a reduction in the link capacity of the antenna.
  • an antenna and an associated method are provided in accordance with an example embodiment in order to provide for an active antenna array that may have a compact form factor, but may also maintain acceptable port-to-port isolation.
  • the antenna may include a plurality of concentric rings that at least partially parasitically balance the radiating modes which, in turn, facilitate port-to-port isolation.
  • an antenna of an example embodiment continues to provide significant radio link capacity and at least partially avoids the degredation of link capacity otherwise brought about by a decrease in the signal-to-interference noise ratio attributable to poor port-to-port isolation.
  • an antenna of an example embodiment may have a compact form factor while continuing to provide an enhanced radio link capacity.
  • an antenna comprising a plurality of radiators defined in a single layer and configured to form a plurality of radiating modes.
  • the antenna also comprises a plurality of concentric rings spaced apart from the plurality of radiators so as to lie in one or more different planes than the plurality of radiators.
  • the plurality of concentric rings are configured to couple with the plurality of radiating modes in order to at least partially parasitically balance the radiating modes.
  • the plurality of concentric rings lie in a single plane spaced apart from a plane in which the plurality of radiators lie. In another embodiment, the plurality of concentric rings lie in a plurality of planes, each of which is spaced apart from a plane in which the plurality of radiators lie. In an example embodiment, at least two of the plurality of concentric rings have different widths as defined between inner and outer radii of a respective ring. At least two of the plurality of concentric rings have different inner radii in an example embodiment. The plurality of concentric rings of an example embodiment are ungrounded.
  • the antenna of an example embodiment further comprises a layer defining a plurality of cavities, each of which is aligned with a respective radiator.
  • an antenna in another example embodiment, comprises a plurality of radiators disposed in a first plane.
  • the antenna also comprises a plurality of ports. Each port is associated with and configured to feed a respective radiator.
  • the antenna further comprises a plurality of concentric rings at least partially overlying the plurality of radiators. The plurality of concentric rings are disposed in one or more planes spaced apart from the first plane.
  • the plurality of concentric rings lie in a single plane spaced apart from the first plane in which the plurality of the first radiators are disposed. In another embodiment, the plurality of concentric rings lie in a plurality of planes, each of which is spaced from the first plane in which the plurality of radiators are disposed. In an example embodiment, at least two of the plurality of concentric rings have different widths as defined between inner and outer radii of respective ring. At least two of the plurality of concentric rings have different radii in an example embodiment. The plurality of concentric rings of an example embodiment are ungrounded.
  • An antenna of an example embodiment further comprises a layer defining a plurality of cavities. With each cavity aligned with a respective radiator. In this example embodiment, each port comprises a feed pin that extends through a respective cavity and makes electrical contact with the respective radiator.
  • a method of operating antenna comprises feeding signals to each of a plurality of radiators defined in a single layer of the antenna.
  • the method further comprises forming, with the plurality of radiators, a plurality of radiating modes in response to the signals.
  • the method further comprises coupling with the plurality of radiating modes and at least partially parasitically balancing the radiating modes with the plurality of concentric rings spaced apart from the plurality of radiators so as to lie in one or more different planes than the plurality of radiators.
  • the method feeds signals by feeding signals via a feed pin that extends through a respective cavity and makes electrical contact with a respective radiator.
  • the plurality of concentric rings lie in a single plane spaced apart from the first plane in which the plurality of radiators are disposed.
  • the plurality of concentric rings lie in a plurality of planes, each of which is spaced apart from the first plane in which the plurality of radiators are disposed.
  • at least two of the plurality of concentric rings have different widths as defined between inner and outer radii of a respective ring.
  • the plurality of concentric rings of an example embodiment are ungrounded.
  • Figure 1 is a perspective view of an antenna in accordance with an example embodiment of an antenna in accordance with an example embodiment
  • Figure 2 is a side view of the antenna of Figure 1 ;
  • Figure 3 is a plan view of the plurality of radiators of the antenna of Figures
  • Figure 4 is a perspective view of a port and an associated cavity with the port comprising a feed pin that extends through the respective cavity and into electrical contact with a respective radiator in accordance with an example embodiment;
  • Figure 5 is a plan view of the plurality of concentric rings of the antenna of
  • Figures 6A, B and C are graphical representations of the directivity, phase and surface currents, respectively, of the antenna of Figures 1 and 2 in an instance in which all of the radiators of the antenna of Figure 1 are fed in-phase;
  • OAM orbital angular momentum
  • Figure 10 is a perspective view of an antenna in accordance with another example embodiment
  • Figure 11 is a perspective view of an antenna in accordance with a further example embodiment
  • Figure 12 is a perspective view of an antenna in accordance with yet another example embodiment.
  • Figure 13 is a flowchart illustrating operations performed in accordance with an example embodiment.
  • An antenna and an associated method are provided in accordance with an example embodiment in order to provide enhanced port-to-port isolation.
  • the antenna and associated method of at least some embodiments provide for the frequencies of the radiating modes, the radiation bandwidth of the radiating modes and the couplings from the ports of the antenna into the radiating modes to be made equal such that all paths of energy between any two ports cancel out such that the port-to-port isolation is enhanced.
  • the signal-to-interference noise ratio is correspondingly enhanced and degradation to the link capacity of the antenna is avoided.
  • the antenna and the associated method of an example embodiment provide for enhanced port-to-port isolation even in instances in which the antenna that comprises of a plurality of radiators and correspondingly a plurality of ports has a compact form factor.
  • the antenna of an example embodiment may be utilized in a variety of applications that demand a compact form factor without degradation of the radio link capacity.
  • the antenna includes a plurality of radiators 12 defined in a single layer 14.
  • the antenna can include any number of radiators and may also include a wide variety of different types of radiators.
  • the antenna comprises seven radiators, each of which is defined by a single layer, and, as a result, lie in a single plane.
  • the layer that defines the plurality of radiators is formed of a sheet of material, such as a conductive material, e.g., a metal or metal alloy, such as and not limited to at least one of: copper, brass, bronze, aluminum, nickel, gold, silver or nickel iron.
  • a conductive material e.g., a metal or metal alloy
  • the layer defines each radiator of the illustrated embodiment to have an opening 16, such as a generally C- shaped opening, with a mushroom-shaped resonant element 18 extending into the opening and configured to serve as a quarter-wave resonator radiating at a quarter wavelength of the resonant frequency (or an integer multiple thereof). See, for example, Figure 3.
  • each of the radiators defined by the layer is the same type of radiator such as by having a resonant element of the same shape and size, such as the same mushroom-shaped resonant element extending into the respective openings defined by the layer.
  • the plurality of radiators 12 of the example embodiment are defined by the layer 14 so as to be disposed in a circular configuration.
  • a central axis 20 is defined that extends through the center of the circular configuration of the plurality of radiators and is orientated so as to be perpendicular to the layer that includes the plurality of radiators.
  • the plurality of radiators of the illustrated embodiment are defined by the layer so as to be symmetric relative to the central axis and, as a result, symmetric relative to the circular configuration of the radiators. In other embodiments, however, the layer may define the radiators to have a different configuration and/or different relative positions.
  • the resonant elements of each of the radiators 12 has the same orientation with respect to the central axis 20.
  • the orientation of a resonant element of a radiator relative to the central axis may be defined by the angle defined between a radial line extending outward from the central axis and a line defining the center of a resonant element.
  • the resonant elements of the plurality of radiators of other embodiments may have different orientations relative to the central axis such that one or more of the resonant elements may effectively be rotated relative to the resonant elements of other radiators.
  • the antenna 10 of an example embodiment also includes a layer 22 that defines a plurality of cavities.
  • the layer generally defines the same number of cavities as the number of radiators, such as seven in the illustrated embodiment.
  • Each cavity is aligned with a respective radiator.
  • Each cavity may also be defined so as to have a size and shape that corresponds to the size and shape of the respective radiator.
  • each cavity may have a size and shape that corresponds to, that is, matches, the size and shape of the C-shaped opening.
  • the cavity of the illustrated embodiment may have a circular shape.
  • the cavity may have a different shape, such as a polygonal shape, e.g., a rectangular or hexagonal shape.
  • the layer that defines the plurality of cavities is formed in an example embodiment by a sheet of material, such as a conductive material, e.g., a metal or metal alloy, such as but not limited to at least one of: copper, brass, bronze, aluminum, nickel, gold, silver or nickel iron.
  • the antenna 10 also includes a layer 24 defining a plurality of ports with each port being associated with and configured feed a respective radiator 12.
  • the layer that defines the port may also be formed by a sheet of material, such as a conductive material, e.g., a metal or metal alloy such as not limited to at least one of: copper, brass, bronze, aluminum, nickel, gold, silver or nickel iron.
  • the port 26 of an example embodiment comprises a feed pin 28 that extends through the respective cavity 30 and makes electrical contact with the respective radiator, such as the resonant element 18 of the respective radiator.
  • feed pins of various types may be utilized, the feed pin of an example embodiment is provided by the center pin of a coaxial cable that extends through the cavity and into contact with the resonant element.
  • the layers 14, 22, 24 that define the plurality of radiators, the plurality of cavities and the plurality of ports may each be grounded or otherwise maintained at a reference voltage, while the radiating elements are fed by signals delivered via a respective port, such as a feed pin of the respective port.
  • “fed” generally refers to the provision of radio frequency (RF) signals without substantial RF losses.
  • the plurality of radiators Upon being fed with signals via the respective ports, the plurality of radiators are configured to radiate, such as by forming a plurality of radiating modes.
  • the layers 14, 22, 24 may be stacked and, as such, be adjacent and in contact with one another. As a result of the contact between the layers, a galvanic connection may be established between each layer and an adjacently disposed layer.
  • the antenna 10 of an example embodiment is configured to at least partially parasitically balance the radiating modes.
  • the antenna of an example embodiment includes a plurality of concentric rings 32 spaced apart from the plurality of radiators 12 so as to lie in one or more different planes then the plurality of radiators. As shown in Figures 1 and 2, the plurality of radiators lie in a first plane while the plurality of concentric rings lie in a second plane, parallel to, but spaced apart from the first plane.
  • the plurality of concentric rings of the embodiment illustrated in Figures 1 and 2 are disposed within a single plane, the plurality of concentric rings may disposed in a plurality of planes in other embodiments as described below with each of these plurality of planes in which the plurality of concentric rings are disposed being spaced apart from the plane in which the plurality of radiators are disposed.
  • Each of the plurality of concentric rings 32 is formed of a conductive material, such as a metal or metal alloy including, but not limited copper, brass, bronze, aluminum, nickel, gold, silver or nickel iron.
  • the plurality of concentric rings may be spaced apart from the plurality of radiators 12 in various manners.
  • each of the plurality of concentric rings is supported by one or more posts formed a non- conductive, e.g., dielectric, material with each post extending outwardly, e.g. upwardly with respective to the orientation of the antenna 10 depicted in the embodiment of Figures 1 and 2, from the layer 14 that includes the plurality of radiators.
  • the plurality of concentric rings formed of a conductive material may be directly supported by the dielectric posts, the plurality of concentric rings of an example embodiment depicted in Figure 5 are disposed upon a substrate 34 formed of an insulative material, such as a fiberglass epoxy resin or other nonconductive, e.g., dielectric, material.
  • the substrate and the plurality of concentric rings may be formed as a circuit board with the plurality of concentric rings being printed upon the underlying substrate.
  • the substrate that supports the plurality of concentric rings may be spaced apart from the layer that includes the plurality of radiators by one or more dielectric post.
  • the plurality of concentric rings are ungrounded and are therefore floating with no electric connection to a reference voltage.
  • the number of concentric rings 32 is based upon the number of radiating modes of the antenna 10.
  • the number of concentric rings is determined by dividing the number of radiators 12 by two. The resulting quotient is the number of concentric rings without consideration of any reminder of the division operation.
  • an antenna operating with 4 or 5 radiating modes has two concentric rings
  • an antenna operating with 6 or 7 radiating modes has three concentric rings
  • an antenna operating with 8 or 9 radiating modes has four concentric rings and so on.
  • At least some of the plurality of concentric rings 32 are generally aligned with the plurality of radiators 12.
  • the plurality of concentric rings are also centered about the center axis so as to be at least partially aligned with the plurality of radiators as shown, for example, in dashed lines in Figure 3.
  • at least some of the plurality of concentric rings and, in one embodiment, all of the concentric rings at least partially and, in some embodiment, entirely overlie the plurality of radiators, such as when viewed along the central axis.
  • the concentric rings 32 may have a circular shape.
  • the plurality of concentric rings may have other annular shapes in correspondence with other configurations of the plurality of radiators 12.
  • an antenna 10 having a plurality of radiators disposed in an elliptical shape may also include a plurality of concentric rings that likewise have an elliptical shape.
  • the plurality of concentric rings 32 are generally sized so as to be spaced apart from one another in a radial direction. As such, the concentric rings generally do not overlap. Thus, at least some and, in certain embodiments, each of the plurality of concentric rings has a different inner radius and a different outer radius than the other concentric rings. Further, at least two in, in some embodiments, each of plurality of concentric rings has different widths as defined between inner and outer radii of a respective ring.
  • the inner radii of each ring as well as the width of each ring and, in some embodiments, the separation distance between a ring and the plurality of radiators 12 may be defined experimentally by feeding the plurality of radiators so as to form the plurality of radiating modes and then utilizing different combinations of concentric rings having different inner radii, different widths and different separation distances from the plurality of radiators in order determine the plurality of concentric rings that provide the desired parasitic balancing of the radiating modes, such as by most greatly parasitically balancing the radiating modes.
  • the seven radiators 12 can provide seven radiating modes.
  • the antenna includes three concentric rings 32 to parasitically balance the seven radiating modes, namely, an inner ring, a middle ring and an outer ring.
  • the antenna of an example embodiment of Figures 1 and 2 that is operated in various modes as represented by Figures 6-9 has a C-shaped opening 16 with a diameter of 18.14 mm and a mushroom- shaped resonant element 18 having a stem with a length of 3.54 mm and a gap of 2.25 mm between the distalmost portion of the resonant element and the closest portion of the circumferential edge of the C-shaped opening.
  • the innermost concentric ring is spaced a radial distance of 14.72 mm from the central axis 20 and has a width between the inner and outer radii of 1.61 mm.
  • the middle concentric ring is spaced a radial distance of 4.41 mm from the innermost concentric ring and has a width between the inner and outer radii of 4.35 mm.
  • the outer concentric ring is spaced a radial distance of 9.10 mm from the middle concentric ring and has a width between the inner and outer radii of 3.67 mm.
  • the plurality of concentric rings of this example embodiment are spaced by 17.34 mm from the plurality of resonant elements.
  • Figures 6A, 6B and 6C graphically represent the directivity, phase and surface currents, respectively, of the antenna at a frequency of 3500 MHz that is fed in this lowest order mode.
  • This lowest order mode does not couple to any of the concentric rings 32 as shown by Figure 6C in which no meaningful surface currents are created in the plurality of concentric rings.
  • reference to the radiators being fed out-of-phase by certain angular amounts refers to the phase difference between the signals with which adjacent radiators are fed.
  • all OAM modes with m > 0 may be linearly polarized with any slant.
  • the antenna 10 of the illustrated embodiment is designed to parasitically balance seven radiating modes as a result of the three concentric rings 32
  • the antenna of other embodiments may be configured to parasitically balance other numbers of radiating modes, such as, but not limited to, nine radiating modes or eleven radiating modes.
  • the antenna would include four concentric rings.
  • the antenna is configured to balance eleven radiating modes, the antenna would include five concentric rings.
  • each concentric ring 32 parasitically balances and controls the radiation bandwidth of a left and right handed circularly polarized OAM mode with larger concentric rings providing for parasitic balancing of higher order modes and smaller concentric rings providing for parasitic balancing of lower order modes.
  • the OAM mode parasitically balanced by a concentric ring has a direct relationship to the size of the concentric ring such that as the mode to be
  • the inner radius of the concentric ring that will couple with mode increases, and conversely, as the mode to be parasitically balanced decreases, the inner radius of the concentric ring that will couple with mode correspondingly decreases.
  • the plurality of concentric rings 32 may lie in a plurality of planes, each of which is spaced apart from the plane in which the plurality of radiators 12 lie.
  • Figures 10 and 11 depict antennas having two concentric rings, each disposed in a different plane with each of the planes in which the concentric rings are disposed being parallel to and spaced apart from the plane in which the plurality of radiators lie.
  • Figure 12 depicts an antenna of another example embodiment having three concentric rings with the smallest ring being in a different plane then the other two concentric rings, but with all of the concentric rings being in different planes than the plane in which the plurality of radiators lie.
  • Figures 10-12 also depict embodiments of antennas 10 that include different types and different numbers of radiators 12.
  • the antenna of Figure 10 includes five radiators, each formed by a portion of an annular conductive ring.
  • Each radiator is fed by a respective feed pin 28 that electrically connects a resonant element 18 of a respective radiator at the location designated by a circle in Figure 10. .
  • the antenna 10 of Figure 11 also includes five radiators 12. Each radiator of this embodiment is a dipole. Although not shown in Figure 11, each dipole is spaced apart from the layer 22 that defines the plurality of cavities 30, such as by one or more dielectric posts that extend outwardly from the underlying layer that defines the plurality of cavities. Although the dipoles may be directly supported by one or more dielectric posts, the dipoles of an example embodiment are disposed, e.g., printed, upon a circuit board with the printed circuit board being supported above the layer that defines the plurality of cavities by one or more dielectric posts. As shown in Figure 11, the feed pins 28 may extend through cavities in order to feed the dipoles.
  • the feed pins are configured to feed the ends of the dipoles and, as such, a small air gap is defined between the feed pins and the respective dipoles.
  • the feed pins could be configured to feed a middle portion of the dipoles and, as such, the feed pins could make a direct electrical connection with the respective dipoles.
  • the antenna 10 of Figure 12 includes seven radiators 12.
  • Each of the radiators of the antenna of Figure 12 is a half-wavelength radiating waveguide slot defined by layer 14 so as to have a predefined angle relative the central axis 20 of the antenna.
  • the antenna 10 of an example embodiment also includes one or more additional antenna elements in order to further configure the radiating modes.
  • the antenna also includes a monopole 36.
  • the monopole of an example embodiment may be centrally located between the plurality of radiators 12, such as along the central axis 20.
  • the monopole includes an optional monopole cap that may be sized so as to facilitate control of the radiating bandwidth and frequency of the monopole mode.
  • the antenna 10 may be operated as shown in the flowchart of Figure 13 by feeding signals to each of the plurality of radiators 12 defined by a single layer 14 of the antenna. See block 40.
  • a plurality of radiating modes are formed by the plurality of radiators. See block 42.
  • the plurality of concentric rings 32 couple with the plurality of radiating modes and at least partially parasitically balance the radiating modes as shown in block 44 of Figure 13.
  • the plurality of concentric rings couple with the radiating modes so as to completely parasitically balance the radiating modes.
  • the plurality of concentric rings enhance the port-to-port isolation of the antenna.
  • the signal-to-interference noise ratio is
  • the antenna of an example embodiment provides for enhanced port-to-port isolation and avoids degradation in link capacity even in instances in which the antenna has a compact form factor with the ports 26 being closely located relative to one another. As such, the performance of the antenna is maintained even with such a compact form factor.
  • the antenna 10 of the foregoing embodiments may be embodied by a wide variety of radio communications equipment including, but not limited to, for example, one or more of: a transmitter, a receiver, a transceiver or an antenna mast.
  • the radio communications equipment including the antenna may be deployed in a variety of applications including a radar device or any of a variety of different networks including, but not limited to, for example, a stationary or mobile radio communications network, a satellite radio network, a power transmission network, a quantum computer or a quantum communications network.

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Abstract

L'invention concerne une antenne et un procédé associé pour fournir une antenne réseau active qui peut avoir un facteur de forme compact, mais peut également maintenir une isolation de port à port acceptable. L'antenne comprend une pluralité d'éléments rayonnants définis dans une seule couche et configurés pour former une pluralité de modes de rayonnement. L'antenne comprend également une pluralité d'anneaux concentriques espacés de la pluralité d'éléments rayonnants de manière à se trouver dans un ou plusieurs plans différents de la pluralité d'éléments rayonnants. La pluralité d'anneaux concentriques sont configurés pour se coupler à la pluralité de modes de rayonnement afin d'équilibrer au moins partiellement de manière passive les modes de rayonnement.
PCT/US2018/067325 2018-12-21 2018-12-21 Antenne ayant des anneaux concentriques et procédé de fonctionnement associé pour équilibrer au moins partiellement de manière passive des modes de rayonnement WO2020131123A1 (fr)

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CN112072295A (zh) * 2020-08-29 2020-12-11 西安电子科技大学 一种小型化多波束涡旋波束产生装置
CN114024135A (zh) * 2021-10-29 2022-02-08 上海交通大学 多模式加载行波的基片集成波导涡旋电磁波天线

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EP1796213A1 (fr) * 2004-09-07 2007-06-13 Nippon Telegraph and Telephone Corporation Dispositif d'antenne, dispositif d'antenne en reseau utilisant le dispositif d'antenne, reseau de modules et module de conditionnement
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US20150123869A1 (en) * 2013-11-06 2015-05-07 Motorola Solutions, Inc Low profile, antenna array for an rfid reader and method of making same
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* Cited by examiner, † Cited by third party
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CN112072295A (zh) * 2020-08-29 2020-12-11 西安电子科技大学 一种小型化多波束涡旋波束产生装置
CN114024135A (zh) * 2021-10-29 2022-02-08 上海交通大学 多模式加载行波的基片集成波导涡旋电磁波天线

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