EP3130037B1 - Appareil et procédé d'antenne réseau cylindrique agile large bande à double polarisation comportant des guides d'ondes radiaux reconfigurables - Google Patents

Appareil et procédé d'antenne réseau cylindrique agile large bande à double polarisation comportant des guides d'ondes radiaux reconfigurables Download PDF

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Publication number
EP3130037B1
EP3130037B1 EP15814201.8A EP15814201A EP3130037B1 EP 3130037 B1 EP3130037 B1 EP 3130037B1 EP 15814201 A EP15814201 A EP 15814201A EP 3130037 B1 EP3130037 B1 EP 3130037B1
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EP
European Patent Office
Prior art keywords
waveguide structure
radial
elements
antenna
conductive elements
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EP15814201.8A
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German (de)
English (en)
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EP3130037A1 (fr
EP3130037A4 (fr
Inventor
Halim Boutayeb
Paul Watson
Toby Kemp
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority claimed from US14/319,981 external-priority patent/US9502765B2/en
Priority claimed from US14/319,884 external-priority patent/US9490535B2/en
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Publication of EP3130037A1 publication Critical patent/EP3130037A1/fr
Publication of EP3130037A4 publication Critical patent/EP3130037A4/fr
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    • 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
    • H01Q21/205—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path providing an omnidirectional coverage
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0012—Radial guide fed arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • 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
    • H01Q3/24—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 orientation by switching energy from one active radiating element to another, e.g. for beam switching
    • H01Q3/247—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 orientation by switching energy from one active radiating element to another, e.g. for beam switching by switching different parts of a primary active element
    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole

Definitions

  • the present invention relates to antenna design, and, in particular embodiments, to an apparatus and method for a dual polarized broadband agile cylindrical antenna array with reconfigurable radial waveguides.
  • Modern wireless transmitters of radio frequency (RF) signals or antennas perform beam steering to manipulate the direction of a main lobe of a radiation pattern and achieve enhanced spatial selectivity.
  • Conventional beam steering techniques rely on manipulating the phase of RF signals through a series of phase shifters and RF switches.
  • the inclusion of phase shifters, RF switches, and other complex components increase the manufacturing cost and design complexity of agile antennas. Accordingly, less complex agile antenna designs with broadband transmissions are desired.
  • JANAPSATYA J et al "A switched beam radial horn antenna design", MICROWAVES, RADAR AND WIRELESS COMMUNICATIONS, 2004, MIKON-2004, 15TH INTERNATIONAL CONFERENCE ON WARSAW, IEEE, vol. 1, pages 51 - 54 , refers to a design of an antenna consisting of a monopole circular array placed inside a radial waveguide. The main beam of the array can be steered around the azimuth plane by changing the reactive loads of the peripheral monopoles surrounding a central monopole.
  • ISMAIL M F et al "The Investigation of PIN diode switch on reconfigurable antenna", RF AND MICROWAVE CONFERENCE (RFM), IEEE INTERNATIONAL, pages 234-237 refers to an investigation and simulation of a PIN diode as a switch on a reconfigurable antenna.
  • FR 1459373 A discloses a radial waveguide feed structure for an array of antennas positioned around a circumference of the radial waveguide structure.
  • the antenna device includes a first radial waveguide structure comprising two first parallel radial plates and a plurality of first conductive elements connected to tunable elements and positioned vertically between the two first parallel plates.
  • the two first parallel plates are separated by a height determined according to desired transmission frequency range for radio frequency (RF) signals, a diameter of the conductive elements, and a clearance space around each one of the conductive elements.
  • the antenna device further includes a second radial waveguide structure similar to the first waveguide structure and comprising two second parallel radial plates and a plurality of second conductive elements similar to the first active elements and connected to second tunable elements.
  • the second conductive elements have the same clearance space as the first conductive elements and are positioned vertically between the two second parallel plates.
  • the two second plates are separated by a same height of separation of the first two parallel plates.
  • the antenna device also includes a plurality of radiating elements positioned between the first radial waveguide structure and the second radial waveguide structure, and distributed radially around a circumference of the first radial waveguide structure and a circumference of the second radial waveguide structure.
  • the first radial waveguide structure and the second radial waveguide structure are in substantially parallel.
  • an agile antenna that beam steers wireless transmissions, e.g., RF or microwave signals, by selectively activating/de-activating tunable elements on radial-waveguides using direct current (DC) switches.
  • the antenna is a dual polarized agile antenna comprising two radial waveguides with electronically controlled power dividers and suitable for broadband transmissions, e.g., in the RF or microwave frequency range.
  • RF frequencies and RF signals is used to represent frequencies and signals, respectively, in the RF, microwave, and other suitable regions of the spectrum for wireless communications.
  • FIG. 1 illustrates a network 100 for communicating data.
  • the network 100 comprises an access point (AP) 110 having a coverage area 112, a plurality of user equipments (UEs) 120, and a backhaul network 130.
  • the AP 110 may comprise any component capable of providing wireless access, e.g., to establish uplink (dashed line) and/or downlink (dotted line) connections with the UEs 120.
  • Examples of the AP 110 include a base station (nodeB), an enhanced node-B (eNB), a femtocell, and other wirelessly enabled devices.
  • the UEs 120 may comprise any components capable of establishing a wireless connection with the AP 110.
  • the backhaul network 130 may be any component or collection of components that allow data to be exchanged between the AP 110 and a remote end (not shown).
  • the network 100 may comprise various other wireless devices, such as relays, femtocells, etc.
  • the AP 110 or other wireless communication devices of the network 100 may comprise an agile antenna device as described below. The agile antenna is used to transmit/receive the wireless or RF signals with the other devices such as for cellular and/or WiFi communications.
  • FIG. 2 shows an embodiment of a dual polarized agile antenna 200, also referred to herein as a dual port waveguide antenna.
  • the dual port waveguide antenna 200 comprises a first radial waveguide structure 205 (e.g., at the bottom or base of the antenna) and a second radial waveguide structure 206 (e.g., at the top of the antenna), which are similar.
  • Each waveguide structure is composed of two parallel radial surfaces separated from each other by a suitable distance.
  • the parallel radial surfaces/plates 211 are electrically connected via a conductive means 213 forming a short circuit termination, which reduces radiation loss compared to open circuit terminated waveguide.
  • the parallel palates 211 are separated by a predetermined height, H, that promotes broadband operation of the antenna, as described further below.
  • the conductive means 213 is a conductive gasket placed around the edges of both plates 211, as described further below.
  • a series of radiating elements 230 is distributed between the first radial waveguide structure 205 and the second radial waveguide structure 206 around the circumference of the two radial waveguides.
  • the radiating elements 230 comprise conductive feed paths 231.
  • a patch 232 is coupled to an outer surface of each radiating element 230.
  • the edges (both bottom and top edges) of the radiating elements 230 form edge probes 233 that electrically connect the radiating elements 230 to the first radial waveguide structure 205 and the second radial waveguide structure 206.
  • the edge probes 233 are parts of the radiating elements 230 and printed with the radiating elements 230 in the fabrication process, which simplifies the manufacturing process of the radiating elements 230 and the edge probes 233.
  • Each radial waveguide also includes a series of ground pins 214 between the two surfaces/plates 211. The ground pins 214 are distributed around the circumference of the radial waveguide and close to the edge probes 233 of the radiating elements 230. Each ground pin 214 may be placed about equal distances from an adjacent pair of edge probes 233.
  • FIG. 3 shows an embodiment of a radial waveguide structure design 300 corresponding to the first radial waveguide structure 205 or the second radial waveguide structure 206.
  • the figure shows the conductive means 213 (e.g., the conductive gasket), portions of the edge probes 233 (at one end of the radiating elements 230), and the ground pins 214.
  • the radial waveguide structure is coupled to a line feed 210 and comprises a plurality of vertical metal or cylindrical conductive elements 220 and RF chokes 208.
  • the line feed 210 is placed on top of an exposed surface of one of the radial plates 211 (shown partially), at the center of the plate 211.
  • the conductive elements 220 are conductive (e.g., metallic) cylinders or wires that are positioned vertically between the radial plates 211, and interspersed horizontally between the line feed 210 and the radiating elements 230, as shown.
  • the RF choke 208 is connected to an end of the conductive elements 220 at the surface/plate 211 connected to the line feed 210.
  • the conductive elements 220 are further coupled to tunable components (as described below) that rely on a source of energy (e.g., DC power) to change the flow of current over the radial waveguide structure 205/206, such as (for example) a PIN diode.
  • a source of energy e.g., DC power
  • the tunable elements include electromechanical components that change the flow of current using moving parts or electrical connections, such as micro-electromechanical systems (MEMS) components.
  • MEMS micro-electromechanical systems
  • the RF chokes 208 may include any components configured to block RF frequency signal without blocking the DC signal.
  • the RF chokes 208 are connected to the top of the respective conductive elements 220 by micro-strips 209.
  • the components above are designed along with the height H between the plates 211 of the radial waveguide structures 205/206 to allow broadband operation of the antenna, as described further below.
  • the line feed 210 is coupled to and positioned at the center of one the plates 211 of the radial waveguide structure 300. As such, the line feed 210 provides an electrical signal (e.g., as a RF signal), which radiates outwardly over the radial waveguide structure 300.
  • the conductive elements 220 are distributed between the radial waveguide surfaces/plates 211, and are interspersed between the line feed 210 and the radiating elements 230 (of which only the edge probes 233 are shown).
  • the conductive elements 220 are connected to tunable elements (as described below) that may be selectively activated/deactivated for the purpose of directing propagation of the RF signal towards selected radiating elements 230.
  • activated tunable elements at the conductive elements 220 act as a power divider that beamsteers wireless transmissions of the antenna. More details regarding the components of the radial waveguide structure 300 are described in U.S. Application No. 13/760,980 filed on February 6, 2013 by Halim Boutayeb and entitled "Electronically Steerable Antenna Using Reconfigurable Power Divider Based on Cylindrical Electromagnetic Band Gap (CEBG) Structure,".
  • CEBG Cylindrical Electromagnetic Band Gap
  • the dual port waveguide antenna 200 includes two radial waveguide structures 205 and 206 (or dual polarization ports) that provide increased agility, better power efficiency, and improved interference mitigation.
  • the dual polarization port waveguides are similar, as described above, and can be controlled similarly to achieve matching polarization thereby substantially doubling the radiation power or signal-to-noise ratio and achieving the improvements above.
  • Such antenna can be used for media-based modulation, for example.
  • the dual port waveguide antenna 200 also is capable of providing broadband operation as described further below.
  • FIG. 4 shows an embodiment of a DC control system 400 for the radial waveguide of the dual port waveguide antenna.
  • the system 400 utilizes DC switches (driven by DC current) for beamsteering control of the agile antenna.
  • DC switches driven by DC current
  • Such control system makes the antenna less complex than conventional agile antennas (which rely on phase shifters and RF switches to effectuate beamsteering).
  • a group of diodes PIN diodes
  • the beamsteering related processing in the agile antenna is based on manipulating the group of PIN diodes, and therefore may be far less complex than the baseband processing (e.g., computing phase/amplitude shifts, etc.) inherent to conventional agile antennas.
  • the microcontroller may be of lower complexity and consumes less power than the processors included in conventional agile antenna designs.
  • a coaxial line feed at the center of the radial waveguide. The coaxial line feed is connected to a RF signal source (not shown).
  • FIG. 5 shows groups of conductive elements 220 with tunable or active elements in the agile antenna 200 that can be controlled by a common switch.
  • the groups of tunable elements at the conductive elements 220 are controlled by the same switch such that fewer switches (e.g., twenty switches in FIG. 5 ) are used to control beamsteering.
  • FIG. 6 is a top view showing an embodiment design 2400 for resonator structure including the conductive element 220 and RF choke 208, which are connected to each other via the micro-strip 209.
  • a tunable or active element such as a PIN diode 207 is also positioned between the micro-strip 209 and the RF choke 208.
  • the combination of these elements forms one DC controlled resonator in the radial structure waveguide 205/206.
  • the micro-strips 209 of the resonators in the radial waveguide structure 205/206 may have different lengths, L, to optimize the transmission coefficient (increase transmissions over a wider range of frequencies).
  • the RF choke 208 is a quarter wavelength open radial stub.
  • the conductive element 220 has a suitable diameter, Dw.
  • Dw diameter of the clearance space around the conductive element
  • L the diameter of the clearance space around the conductive element
  • Dclear shown in FIG. 6 .
  • H is set to about a quarter wavelength. This is possible by the design 2400 of the resonator and by adjusting the dimensions (L, Dw, Dclear, H) of its components accordingly.
  • FIG. 7 shows an isometric view 610 and a top view 620 of a test waveguide structure including a plurality of structures similar to the resonator structure of FIG. 7 .
  • the test waveguide structure is simulated (using computer simulation) as a rectangular waveguide including a row of 3 active structures with periodic boundary conditions (Floquet boundary condition).
  • the structure has two ports (Port 1 and Port 2) on opposite ends of the row of elements.
  • FIG. 8 shows a frequency spectrum, obtained by simulation, for the test waveguide structure in ON state (PIN diodes 207 are switched ON), and FIG. 9 is the frequency spectrum in the OFF state (PIN diodes 207 are switched OFF).
  • the values of the transmission coefficient (dashed line curve) and the reflection coefficient (solid line curve) are shown in dB across a frequency range from 1 to 8 Gigahertz (GHz).
  • the curves in FIG. 8 and 9 show that the resonator structures (including the PIN diodes 207) can be used for passing radiation when the PIN diodes 207 are ON, in the band from 5 to 6 GHz.
  • FIG. 10 shows a frequency spectrum for another example design of test waveguide structure in ON state (PIN diodes 207 are switched ON), and FIG. 11 is the frequency spectrum in the OFF state (PIN diodes 207 are switched OFF).
  • the resonator is turned ON and OFF by DC control of the PIN diode 207.
  • the values of the transmission coefficient (dashed line curve) and the reflection coefficient (solid line curve) are shown in dB across a frequency range from 1 to 8 GHz.
  • FIGs 8 to 11 show that changing the length of micro-strips affects the switching effect of the PIN diodes 207, and hence the operation of the waveguide structure and thus the beamsteering of the RF signal.
  • FIG. 12 shows an example of a power divider configuration 3000 of the antenna.
  • the resonator structures are grouped into different groups, each corresponding to a port of the radial waveguide structure 205/206.
  • the radial waveguide structure 205/206 has a diameter of about 164 mm, and the height of separation between the plates of the radial waveguide structure 205/206 is equal to about 10 mm.
  • the radial waveguide structure 205/206 includes 36 resonator structures with 36 corresponding diodes, and a total of 12 ports, each port being controlled by several DC switches. Five ports are shown for illustration. Only the resonators corresponding to ports 2 and 4 are turned ON (e.g., the diodes are turned ON).
  • FIG. 13 shows the frequency spectrum (in dB) for the coefficient S11 (reflection coefficient at port 1), S21 (transmission coefficient from port 1 to port 2), S31 (transmission coefficient from port 1 to port 3), S41 (transmission coefficient from port 1 to port 4), and S51 (transmission coefficient from port 1 to port 5), according to the configuration of FIG. 12 .
  • S11 reflection coefficient at port 1
  • S21 transmission coefficient from port 1 to port 2
  • S31 transmission coefficient from port 1 to port 3
  • S41 transmission coefficient from port 1 to port 4
  • S51 transmission coefficient from port 1 to port 5
  • FIG. 14 shows a frequency spectrum for an exemplary configuration of the dual port waveguide antenna.
  • the power divider is configured and controlled (by turning ON/OFF selected diodes) similarly at the two radial waveguide structures 205/206 to achieve a desired radiation pattern.
  • the figure shows good impedance matching: the reflection coefficient S11 at port 1 corresponding to the line fine of one waveguide and the reflection coefficient S22 of port 2 corresponding to the line feed of the other waveguide are low.
  • the figure shows also low coupling between ports 1 and 2: transmission coefficient from port 2 to port 1 or vice versa is low.
  • the coupling of the waveguides at a desired band range should be relatively low in the range from 5 to 6 GHz.
  • FIG. 15 shows the corresponding radiation pattern (in 3D space) of the configuration of FIG. 14 .
  • FIG. 16 shows the normalized gain in dB of co-polarization (solid line) and cross-polarization (dashed line) of the two waveguides of FIG. 15 on a first plane (Y-Z plane), and
  • FIG. 17 shows the normalized gain of the co-polarization and cross-polarization on a second plane (X-Y plane).
  • FIGs. 16 and 17 show relatively high transmission (polarization) at the corresponding planes and relatively low cross polarization due to coupling between the two waveguides.
  • FIG. 18 illustrates various beam radiation patterns and orientations achievable by controlling a power divider of the antenna, as described above.
  • the patterns include various orientation of the beam (at different angles, e.g., 0, 10°, 20°, 30°), various beam shapes (e.g., wider beam, more wider beam), and various numbers of simulated radiated beams (e.g., in one or more directions).
  • the various beam formations above can be achieved using the same waveguide structures (the same dual port antenna) by tuning ON/OFF different groups of diodes (for different resonators).
  • FIG. 19 shows an embodiment method 1900 for making and using the agile antenna as described above.
  • a frequency range desired for the broadband radio transmission of the antenna is determined.
  • a height of a plurality of cylindrical conductive elements of the antenna is determined to enable the broadband radio transmission in the frequency range.
  • a radial waveguide structure of the antenna is assembled by positioning vertically and distributing radially the cylindrical conductive elements between the parallel plates.
  • a second radial waveguide structure similar to the radial waveguide structure is assembled by positioning vertically and distributing radially a plurality of second cylindrical conductive elements, similar to the cylindrical conductive elements, between two second parallel plates similar to the two parallel plates.
  • the radial waveguide structure and the second radial waveguide structure are positioned in parallel.
  • a plurality of radiating elements are placed around a circumference of the radial waveguide structure and a circumference of the second radial waveguide structure.
  • a DC controller and a plurality of direct current (DC) switches are connected to multiple groups of the cylindrical conductive elements with tunable elements and similar groups of the second cylindrical conductive elements with second tunable elements. Each one of the DC switches is connected to a corresponding group of the tunable elements and a corresponding second group of the second tunable elements.
  • one or more of the groups of the tunable elements and one or more of the second groups of the second tunable elements are selected for activation in accordance with a desired propagation direction and transmission frequency for a RF signal within the frequency range for the broadband radio transmission of the antenna.
  • one or more of the DC switches that are connected to the selected groups and second groups are switched ON, via the controller.
  • FIG. 20 illustrates a block diagram of an embodiment of a communications device 2000 including a processor 2004, a memory 2006, and a switching interface 2014, which may (or may not) be arranged as shown in FIG. 20 .
  • the processor 2004 may be any component capable of performing computations and/or other processing related tasks, and may be equivalent to the microcontroller 250 (discussed above).
  • the memory 2006 may be any component capable of storing programming and/or instructions for the processor 2004.
  • the switching interface 2014 may be any component or collection of components that allows the processor 2004 to manipulate or otherwise control a series of DC switches for the purpose of effectuating beamsteering on an agile antenna.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)

Claims (5)

  1. Dispositif antenne (200), caractérisé en ce qu'il comprend :
    une première structure radiale de guidage d'ondes (205) comprenant deux premières plaques radiales parallèles (211) et une pluralité de premiers éléments conducteurs (220) connectés à des éléments accordables et positionnés verticalement entre les deux premières plaques parallèles (211), les deux premières plaques parallèles (211) étant séparées par une hauteur déterminée selon une plage de fréquences d'émission souhaitée pour des signaux radioélectriques (RF), un diamètre des éléments conducteurs (220) et un espace de dégagement autour de chacun des éléments conducteurs (220) ;
    une seconde structure radiale de guidage d'ondes (206) similaire à la première structure de guidage d'ondes (205) et comprenant deux secondes plaques radiales parallèles (211) et une pluralité de seconds éléments conducteurs (220) similaires aux premiers éléments conducteurs (220) et connectés à des seconds éléments accordables, les seconds éléments conducteurs (220) ayant le même espace de dégagement que les premiers éléments conducteurs (220) et étant positionnés verticalement entre les deux secondes plaques parallèles (211), et les deux secondes plaques (211) étant séparées par une même hauteur de séparation que les deux premières plaques parallèles (211) ; et
    une pluralité d'éléments rayonnants (230) positionnés entre la première structure radiale de guidage d'ondes (205) et la seconde structure radiale de guidage d'ondes (206), et distribués radialement autour d'une circonférence de la première structure radiale de guidage d'ondes (205) et d'une circonférence de la seconde structure radiale de guidage d'ondes (206), la première structure radiale de guidage d'ondes (205) et la seconde structure radiale de guidage d'ondes (206) étant sensiblement parallèles.
  2. Dispositif antenne selon la revendication 1, comprenant en outre :
    une première alimentation de ligne connectée sensiblement à un centre d'une surface de la première structure radiale de guidage d'ondes et à une source de signal RF ;
    une seconde alimentation de ligne connectée à sensiblement un centre d'une surface de la seconde structure radiale de guidage d'ondes et à la source de signal RF ;
    une pluralité d'interrupteurs à courant continu (CC) connectés aux éléments accordables et aux seconds éléments accordables ; et
    un contrôleur pour les interrupteurs CC, le contrôleur permettant l'activation et la désactivation des éléments accordables et des seconds éléments accordables en fermant et en ouvrant les interrupteurs CC.
  3. Dispositif antenne selon la revendication 2, dans lequel chacun des éléments conducteurs est connecté à un microruban et à une diode, l'antenne comprenant en outre une pluralité de pièges RF, chacun des pièces RF étant connecté à une des diodes.
  4. Dispositif antenne selon la revendication 3, dans lequel la même hauteur de séparation des deux premières plaques parallèles et des deux secondes plaques radiales est déterminée selon une longueur du microruban, du diamètre des éléments conducteurs et de l'espace de dégagement autour de chacun des éléments conducteurs.
  5. Antenne selon la revendication 4, dans lequel la hauteur, la longueur du microruban, le diamètre des éléments conducteurs et l'espace de dégagement déterminent une émission à large bande de l'antenne, l'émission à large bande empiétant sur une plage de fréquences d'environ 5 gigahertz à environ 6 gigahertz.
EP15814201.8A 2014-06-30 2015-06-27 Appareil et procédé d'antenne réseau cylindrique agile large bande à double polarisation comportant des guides d'ondes radiaux reconfigurables Active EP3130037B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US14/319,981 US9502765B2 (en) 2014-06-30 2014-06-30 Apparatus and method of a dual polarized broadband agile cylindrical antenna array with reconfigurable radial waveguides
US14/319,884 US9490535B2 (en) 2014-06-30 2014-06-30 Apparatus and assembling method of a dual polarized agile cylindrical antenna array with reconfigurable radial waveguides
PCT/CN2015/082586 WO2016000577A1 (fr) 2014-06-30 2015-06-27 Appareil et procédé d'antenne réseau cylindrique agile large bande à double polarisation comportant des guides d'ondes radiaux reconfigurables

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EP3130037A1 EP3130037A1 (fr) 2017-02-15
EP3130037A4 EP3130037A4 (fr) 2017-07-26
EP3130037B1 true EP3130037B1 (fr) 2019-08-14

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EP3130037A1 (fr) 2017-02-15
WO2016000607A1 (fr) 2016-01-07
WO2016000577A1 (fr) 2016-01-07
CN105874648B (zh) 2020-04-21
CN105874648A (zh) 2016-08-17
EP3130037A4 (fr) 2017-07-26

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