[go: up one dir, main page]

WO1994026001A1 - Systemes d'antennes orientables - Google Patents

Systemes d'antennes orientables Download PDF

Info

Publication number
WO1994026001A1
WO1994026001A1 PCT/US1994/004786 US9404786W WO9426001A1 WO 1994026001 A1 WO1994026001 A1 WO 1994026001A1 US 9404786 W US9404786 W US 9404786W WO 9426001 A1 WO9426001 A1 WO 9426001A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
reflector
steerable
choke
section
Prior art date
Application number
PCT/US1994/004786
Other languages
English (en)
Inventor
Joseph T. Merenda
Alfred R. Lopez
Original Assignee
Hazeltine Corporation
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 Hazeltine Corporation filed Critical Hazeltine Corporation
Publication of WO1994026001A1 publication Critical patent/WO1994026001A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02—Waveguide horns
    • H01Q13/04—Biconical horns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
    • H01Q19/13—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination
    • H01Q19/138—Parallel-plate feeds, e.g. pill-box, cheese aerials
    • 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
    • H01Q3/12—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems
    • H01Q3/16—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device
    • H01Q3/20—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device wherein the primary active element is fixed and the reflecting device is movable

Definitions

  • This invention relates to steerable antennas and, more particularly, to directive antennas which, can be vertically ganged and rotated for communication in different directions selected based upon signal acquisition by a lower gain omnidirective antenna.
  • LAN wireless local area network
  • a wireless local area network for mobile field use
  • an antenna on the roof of a vehicle for communication with one or more other nodes.
  • Each such node could use a similar transmit/receive antenna serving mobile radio equipment or a fixed radio communication site, for example.
  • an omnidirective antenna would provide the capability of receiving signals from any direction or azimuth angle, and over a reasonable range of elevation angles, the gain of such antennas may be too low for limited transmission power applications.
  • Use of directional antennas could solve the antenna gain problem, however electronically steered directional antennas have generally been too complex and expensive for such applications and mechanically steered antennas have generally necessitated use of rotary joints. Two general types of rotary joints have been known.
  • a waveguide rotary joint typically includes, in series, a transition from rectangular to circular waveguide utilizing a polarizer or mode converter, a non-contacting rotary choke, and a circular to rectangular waveguide transition utilizing a second polarizer or mode converter. While providing good performance, such a waveguide rotary joint is complex, expensive and of extended size relative to the waveguide dimensions.
  • a coaxial rotary joint typically includes a transition from a fixed coaxial line to a rotatable coaxial line section relying upon mechanical spring finger contacts, which make rubbing contact with the center and outer conductors at the transition. Such physical contact arrangements may introduce limitations as to performance, reliability and useful life.
  • a wireless local area network operating at higher frequencies, such as in the extremely high frequency (EHF) range in the vicinity of 60 GHz.
  • EHF extremely high frequency
  • At such frequencies increased attenuation of transmitted signals by oxygen absorption is helpful in minimizing self-interference and inter- system interference, and in greatly reducing the probability of data interception by unauthorized parties.
  • the wavelength is so small that it becomes impractical or overly expensive to fabricate all the components of a typical waveguide rotary joint.
  • the coaxial line becomes very small in view of constraints regarding prevention of higher mode propagation. As a result, fabrication and use of the required inner conductor contacts becomes impractical.
  • Additional objects are to provide new and improved antennas and antenna systems which avoid one or more disadvantages or limitations of prior devices.
  • a steerable antenna includes a collimator rotatable about a central axis and a circular choke aligned with the central axis and having a movable portion rotatable with the collimator and a fixed portion cooperating with the movable portion.
  • a transmission line section is aligned with the central axis and coupled to the fixed portion of the choke.
  • Coupling means including probe means aligned with the central axis, is provided for coupling signals from the collimator to the transmission line section.
  • Rotation means coupled to the movable portion of the choke, enable the collimator to be rotated for signal reception from a desired direction.
  • a steerable antenna system includes a first antenna having a wide antenna pattern able to receive signals from a range of directions relative to a central axis.
  • a second antenna includes focusing means rotatable about the central axis and providing a more directive antenna pattern than the first antenna, a circular choke having a movable portion rotatable with the focusing means and a fixed portion cooperating with the movable portion, a transmission line section coupled to the fixed portion of the choke, and coupling means for coupling signals from the reflector to the transmission line section.
  • Rotation means coupled to the movable section of the choke, enable the focusing means to be rotated toward the direction of a first signal received by the first antenna to permit the second antenna to receive the first signal.
  • Steering means are coupled to the movable section of the choke for rotating the reflector and control means, coupled to the steering means and responsive to the first signal, enable the steering means to rotate the reflector until the first signal is received by the second antenna.
  • Fig. 1 shows a steerable antenna system in accordance with the invention which includes one omnidirective antenna and three steerable directive antennas.
  • Figs. 2A, 2B and 2C show details of a steerable antenna of Fig. 1.
  • Figs. 3A and 3B illustrate a dielectric lens embodiment of a steerable antenna using the invention.
  • Figs. 4A and 4B show an alternate form of probe configuration for use in a steerable antenna in accordance with the invention.
  • Fig. 1 shows a steerable antenna system 10 utilizing the present invention.
  • typical dimensions of the Fig. 1 antenna system may approximate a height of less than twelve inches with a cylindrical radome diameter of about three inches.
  • the Fig. 1 system includes a first antenna 12, shown as a bi-conical horn antenna, having a wide or omnidirective antenna pattern.
  • Antenna 12 includes upper and lower conical reflector surfaces 14 and 16 forming an omnidirective horn which is fed by the extended center conductor 18 of a simple coaxial feed at a transition to coaxial line from a waveguide feeding the antenna.
  • antenna 12 provides relatively low gain omnidirective coverage to enable reception of signals from a range of directions from 0° to 360° relative to a central axis 20 passing through the center of the antenna system 10.
  • the Fig. 1 antenna system also incorporates a second antenna, shown as steerable pillbox type antenna 22.
  • antenna 22 includes two basic sections, a rotatable focusing (e.g., reflector) assembly 24 and a base assembly 26.
  • a rotatable focusing (e.g., reflector) assembly 24 and a base assembly 26.
  • Figs. 2A, 2B and 2C features of antenna 22 are illustrated in greater detail.
  • Fig. 2A shows in simplified form a plan view of the focusing assembly 24, including a collimator shown as parabolic reflector- 28 which is rotatable, as indicated by arrow 30, about central axis 20 of Fig. l .
  • parabolic reflector- 28 which is rotatable
  • axis 20 passes through signal coupling means shown as a monopole feed or probe 32, which is mounted from below so as to lie at the focus of the reflector 28.
  • signal coupling means shown as a monopole feed or probe 32, which is mounted from below so as to lie at the focus of the reflector 28.
  • the focus of reflector 28 falls on the central axis 20, the reflector is rotatable about axis 20 and, as a result, the fixed probe 32 always remains at the focus of the reflector 28 as the reflector rotates.
  • “collimator” refers to a device, such as a reflector or lens, for focusing divergent ray paths to a substantially parallel relationship, or vice versa.
  • the pillbox type focusing assembly 24 includes upper and lower planar reflective surfaces 34 and 36 and angled entrance flaps 38 and 40, which are effectively extensions of surfaces 34 and 36.
  • the focusing assembly 24 thus includes a narrow parabolic reflector 28, which provides focusing as indicated by the ray path arrows 42 in Fig. 2A, and angled flaps 38 and 40, which are proportioned to provide a level of elevation directivity.
  • the focusing assembly also includes a sub-reflector, shown as flat surface 44, which serves to reflect signals radiated toward it (from omnidirective probe or monopole 32) back toward parabolic surface 28.
  • Figs. 2A and 2B will typically be constructed of metal sections of finite thickness, although thickness is not shown in these simplified views.
  • the focusing element may be a dielectric lens rather than the parabolic reflector of Fig. 2A.
  • Fig. 2C there is shown an expanded view of a portion of the Fig. 2B focusing ⁇ assembly, together with directly associated portions of the base assembly 26 (which underlies focusing assembly 24, as shown in Fig. 1).
  • signals radiated by monopole 32 travel to the left, directly or after reflection from sub-reflector 44, and are reflected by the parabolic reflector (not included in this sectional view) to leave the antenna as a beam directed to the right, as indicated by ray path arrows 42 in Fig. 2A.
  • a section of transmission line shown as waveguide section 46, is positioned in alignment with an opening 48 through which the monopole probe radiator 32 extends into its position between sub- reflector 44 and main parabolic reflector 28.
  • the monopole or probe 32 is supported in known manner from the side of the waveguide 46, so that the probe will remain in fixed position at the focus of the reflector as the reflector assembly rotates around it.
  • second antenna 22 of Fig. 1 also includes a circular non-contacting choke 50 having a fixed section and a movable section which is rotatable with parabolic reflector 28.
  • the fixed section of choke 50 comprises the upper surface of the mechanical structure defining the wavequide section 46 and includes a circular channel 52.
  • the movable section of choke 50 comprises the lower surface of the portion of the lower section 36 of the reflector assembly 24 which surrounds the opening 48.
  • this combination of the lower surface of section 36 and the upper surface of the structure forming waveguide 46, incorporating the circular channel 52, provides a circular choke 50 effective to constrain signals within the waveguide/probe signal channel, without requiring electrical contact between the rotatable upper section and the fixed lower section of the choke. It will further be appreciated that this result is accomplished without requiring either contacting fingers or a multitude of precision machined parts., which may be very expensive or physically impractical to provide for higher frequency applications, such as the EHF range wireless LAN network discussed above.
  • the base assembly 26 of antenna 22 may appropriately include rotation means, coupled to the movable section of the choke 50, to enable the reflector assembly 24 to be rotated toward the direction of desired signal reception or transmission.
  • the rotation means includes a circular ball bearing assembly 54 rotatably coupling the reflector assembly 24 to the base assembly 26. Any arrangement suitable for enabling the desired rotation may be employed, including arrangements as simple as cooperating surfaces coated with a suitable low friction durable substance. No electrical contact is required to be provided by the bearing or other rotation means with the use of a choke such as shown.
  • the base assembly 26 also includes steering means shown as motor 56 controlling a drive gear 58, which drives a circular ring gear 60, and a resolver 62 activated by a gear 64 which is driven by ring gear 60.
  • motor 56 causes drive gear 58 to rotate the reflector assembly 24 by driving the ring gear 60.
  • Resolver 62 provides signals at terminal 66 which represent reflector position data responsive to rotation of drive gear 64 by ring gear 60, which is under the positioning control of the motor 56.
  • items 56 through 66 may be omitted and the reflector assembly 24 may simply be rotated to a desired position manually as permitted by the rotation means, shown as bearing assembly 54.
  • an antenna system incorporating antenna 22 may also include control means 68, coupled to motor 56 of the steering means. Motor 56 is thus responsive to signals input at terminal 70 which are indicative of a direction to which it is desired to rotate the reflector for reception of signals from a transmitter lying in that direction, for example. As shown, control means 68 is also responsive to signals from resolver 62 representative of the direction to which the focusing means has currently been rotated.
  • the antenna system 10 additionally includes a third antenna 70 and a fourth antenna 72, each consisting of a steerable pillbox type antenna of the same form as the second antenna 22.
  • Each of the antennas 70 and 72 thus includes a reflector, a sub- reflector, a circular choke, a transmission line section, coupling means, rotation means and steering means as shown in, and described with reference to, Figs. 2A, 2B and 2C.
  • control means 68 of Fig. 2C may be configured for control of each of antennas 22, 70 and 72.
  • the first, second, third and fourth antennas 12, 22, 70 and 72 are positioned one above the other in a coaxial stacked or ganged relationship aligned with the central axis 20 about which the reflector assemblies of antennas 22, 70 and 72 are rotatable.
  • each antenna is capable of independently receiving or transmitting a signal at any direction from 0° to 360° relative to the central axis 20.
  • the vertical waveguide sections 74 feeding the antennas may degrade operation in the direction of the vertical waveguides to some extent.
  • waveguide sections 74 may comprise three radially stacked waveguides passing upward from antenna 72 to antenna 70, two waveguides passing upward between antennas 70 and 22, and a single waveguide between antennas 22 and 12. Control wiring may also be positioned with the waveguide sections to reach the respective antennas.
  • Waveguide and control wiring couplings are provided within base section 76 (which includes a mounting flange 78) to permit connections to control, receiver and transmitter equipment after the antenna system is mounted upon a vehicle or other • support structure.
  • the Fig. 1 configuration permits all of the antennas to be enclosed within a cylindrical radome 80, shown with the front portion cut away.
  • Radome 80 may be a dielectric radome approximately one- half wavelength thick or be of other suitable construction providing protection of .the enclosed antennas.
  • the cylindrical radome 80 had an outside diameter of approximately three inches, exclusive of flange 78, and the overall antenna system had a height of about one foot.
  • the individual reflector assemblies 22, 70 and 72 were effective to provide 3 dB beam coverage of approximately 9 degrees in azimuth and 20 degrees in elevation, at about 56 GHz.
  • the omnidirective antenna 12 can be used as a low gain signal acquisition antenna. Then, when a received signal of interest is identified as lying at a particular direction from the antenna, the reflector assembly of one of the antennas 22, 70 and 72 can be rotated to face in that direction in order to establish a higher gain communication link with the source of such received signal. Correspondingly, the remaining ones of antennas 22, 70 and 72 can be rotated to establish communication links with radio installations at other directions from antenna system 10. It will be appreciated that, with the inclusion of a drive motor as shown in Fig.
  • the reflector assembly of antenna 22 could simply be caused to rotate slowly while the received signals were monitored until the desired signal (as still being received by antenna 12) was received by antenna 22. Rotation of antenna 22 would be stopped in that position. At short range, such steering could be replaced or augmented by visual sighting of a desired communication antenna and steering of the antenna in the direction so identified.
  • an antenna such as antenna 12, having a basic omnidirectional pattern can be utilized in a direction finding arrangement for identifying the direction of an incoming signal and automatically directing one of antennas 22, 70 and 72 in such direction. With a simple coaxial type feed as previously discussed, antenna 12 exhibits uniform phase at all azimuth angles. This coverage may be referred to as uniform phase omni or UPO.
  • an omni pattern that exhibits a progressive phase characteristic i.e., 360 degree electrical degree phase change over the 360 degree azimuth coverage
  • This coverage is sometimes referred to as progressive phase omni or PPO.
  • a network can be provided to cause both the PPO and UPO omni patterns to be produced at different azimuth portions of a single antenna, such as antenna 12.
  • a cardioid pattern is obtained.
  • the angular direction of the resulting cardioid null can be steered by relative phasing of the PPO and UPO patterns.
  • the direction to the origin of a received signal may be determined.
  • antenna 12 may be utilized to successively identify a desired signal direction for each of antennas 22, 70 and 72.
  • the resulting directional information can be used in control means 68 to steer the individual antennas to the desired directions, in conjunction with rotational reference information from resolvers 62 indicative of the directional alignment of each individual antenna.
  • Figs. 3A and 3B there are shown simplified top and sectional side views of an antenna in accordance with the invention which utilizes a collimator in the form of a dielectric lens in a focusing assembly 22a in substitution for the parabolic pillbox reflector of antenna 22.
  • Figs. 3A and 3B there are shown simplified top and sectional side views of an antenna in accordance with the invention which utilizes a collimator in the form of a dielectric lens in a focusing assembly 22a in substitution for the parabolic pillbox reflector of antenna 22.
  • the lower surface 36 of the pillbox is replaced by a circular ground plane 36a and monopole or probe 32 and sub-reflector 44 may be similar to the like-numbered elements shown in Fig. 2C.
  • Figs. 3A and 3B may correspond to those shown in Fig. 2C.
  • the principle difference in Figs. 3A and 3B is the omission of the parabolic pillbox configuration and the addition of dielectric lens 80.
  • signals radiated from monopole 32 directly, and after reflection from sub-reflector 44, are subjected to a focusing action to provide a directional beam after passage through the lens.
  • Operation of antenna 22a is otherwise similar to that of antenna 22 and lens designs appropriate for particular applications can be provided by persons skilled in the art.
  • dielectric lens alternative form of antenna it will be appreciated that other forms of antenna, such as an antenna parabolically shaped in both horizontal and vertical planes (the reflector of Figs.
  • monopole or probe element 32 is supported in fixed position from the wall of waveguide section 46 and extends up through opening 48 in the rotatable reflective section 36. With this arrangement, the fixed probe element remains at the focus of the reflector 28 (which lies on the axis of rotation) even though the reflector assembly is rotated to face in different directions.
  • Figs. 4A and 4B there is illustrated an embodiment in which a different configuration of probe element is supported on the rotatable reflective section 36 so that the probe element 32a rotates with the focusing assembly of the antenna.
  • probe element 32a As shown, the upper portion of probe element 32a is positioned a distance 86 away from the opening 48 which is concentric with the central axis of rotation (axis 20) .
  • Probe element 32a as shown, includes a horizontal portion supported from surface 36 and terminates in a lower probe portion which extends down into the waveguide section 46. Since the lower probe portion lies on the axis of rotation, it will maintain a constant position relative to the waveguide section even as the probe rotates with the reflective section 36.
  • focusing elements such as a sub-reflector and parabolic reflector or dielectric lens, the added flexibility of being able to so position the upper radiating element portion of probe 32a at an offset from the central axis 20 provides added flexibility in overall antenna design.
  • the actual design, shape and offset of radiating element 32a is determined in the particular design and the circular choke and other elements may be provided as described with reference to Fig. 2C.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

Une antenne de réseau local (LAN) à 60 GHz comprend un raccord tournant simplifié qui permet d'orienter l'antenne. Une antenne omnidirective (12) à plus faible gain est montée coaxiale avec une antenne directive orientable (22) utilisée à des fins de communication. L'antenne orientable (22) comprend un réflecteur (24) pouvant tourner autour d'un axe médian (20) conjointement avec la partie rotative d'un raccord rotatif simplifié (Fig. 2C). Un guide d'ondes (46) est couplé à la partie fixe du raccord rotatif, et des signaux sont couplés entre le guide d'ondes et le réflecteur par l'intermédiaire d'une sonde (32) positionnée sur l'axe médian. Cette combinaison, qui permet d'utiliser un couplage de signaux direct entre le guide d'ondes et le réflecteur, permet d'éviter l'utilisation d'un raccord rotatif guide d'ondes/guide d'ondes ou ligne coaxiale/ligne coaxiale. Au moins trois antennes orientables (22, 70, 72) peuvent être empilées de manière coaxiale avec une antenne d'acquisition omnidirective (12), et le système d'orientation automatique peut être appliqué afin de communiquer dans des directions différentes. Selon les modes particuliers de réalisation, une antenne en D (24) ou une lentille diélectrique (84) est utilisée.
PCT/US1994/004786 1993-04-30 1994-04-29 Systemes d'antennes orientables WO1994026001A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5544593A 1993-04-30 1993-04-30
US08/055,445 1993-04-30

Publications (1)

Publication Number Publication Date
WO1994026001A1 true WO1994026001A1 (fr) 1994-11-10

Family

ID=21997844

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/004786 WO1994026001A1 (fr) 1993-04-30 1994-04-29 Systemes d'antennes orientables

Country Status (1)

Country Link
WO (1) WO1994026001A1 (fr)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0802579A3 (fr) * 1996-04-15 2000-04-26 Nippon Telegraph And Telephone Corporation Antenne de secteurs multiples
US6236376B1 (en) 1998-06-18 2001-05-22 Sivers Lab Ab Suspension device
WO2002050950A1 (fr) * 2000-12-19 2002-06-27 Radiant Networks Plc Structure portante pour antennes, emetteur-recepteur et joint tournant
WO2006049829A2 (fr) 2004-10-27 2006-05-11 Azalea Networks Procede et systeme permettant de creer et de deployer un reseau maille
GB2435745A (en) * 2001-06-26 2007-09-05 Bae Systems Plc Dual feed antenna with independently rotatable radiation paths
WO2007132262A1 (fr) * 2006-05-11 2007-11-22 Bae Systems Plc Antenne multibande empilée
US8351987B2 (en) 2006-09-27 2013-01-08 Dragonwave, Inc. Wireless network communication apparatus, methods, and integrated antenna structures
GB2539727A (en) * 2015-06-25 2016-12-28 Airspan Networks Inc A configurable antenna and method of operating such a configurable antenna
US9706419B2 (en) 2015-06-25 2017-07-11 Airspan Networks Inc. Antenna apparatus and method of performing spatial nulling within the antenna apparatus
US9924385B2 (en) 2015-06-25 2018-03-20 Airspan Networks Inc. Antenna apparatus and method of configuring a transmission beam for the antenna apparatus
US9973943B2 (en) 2015-06-25 2018-05-15 Airspan Networks Inc. Wireless network configuration using path loss determination between nodes
GB2557629A (en) * 2016-12-13 2018-06-27 Bae Systems Plc Antenna arrangement
EP3352295A1 (fr) * 2017-01-18 2018-07-25 BAE SYSTEMS plc Agencement d'antenne
US10070325B2 (en) 2015-06-25 2018-09-04 Airspan Networks Inc. Sub-sampling antenna elements
US10098018B2 (en) 2015-06-25 2018-10-09 Airspan Networks Inc. Configurable antenna and method of operating such a configurable antenna
US10231139B2 (en) 2015-06-25 2019-03-12 Airspan Networks Inc. Node role assignment in networks
US10257733B2 (en) 2015-06-25 2019-04-09 Airspan Networks Inc. Managing external interference in a wireless network
WO2019121094A1 (fr) * 2017-12-22 2019-06-27 Thales Nederland B.V. Agencement d'antennes intégrées
US10656192B2 (en) 2017-01-03 2020-05-19 Universidad Técnica Federico Santa María Device for measuring a wireless radio frequency channel with directional measurement ability (angular)
US10667145B2 (en) 2015-06-25 2020-05-26 Airspan Networks Inc. Bearing calculation
US10834614B2 (en) 2015-06-25 2020-11-10 Airspan Networks Inc. Quality of service in wireless backhauls
GB2630573A (en) * 2023-05-30 2024-12-04 Kolokotronis Dimitris Self-organizing directional antenna system for radio terminal stations

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532551A (en) * 1945-02-19 1950-12-05 George A Jarvis Biconical electromagnetic horn antenna
US3226722A (en) * 1962-08-17 1965-12-28 Andrew Corp Probe fed pillbox antenna with pattern shaping pins at aperture
DE1516736A1 (de) * 1966-05-13 1969-01-02 Krupp Gmbh Pillbox-Antenne
GB1261587A (en) * 1968-05-21 1972-01-26 Telefunken Patent Aerial system consisting of 2 aerials vertically offset with respect to one another at least the lower one being a crossed direction-finding aerial system
US4876554A (en) * 1988-01-19 1989-10-24 Qualcomm, Inc. Pillbox antenna and antenna assembly
JPH05188128A (ja) * 1991-07-26 1993-07-30 Susumu Sakuma 非常信号の発信及び受信を通じて行う警備方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532551A (en) * 1945-02-19 1950-12-05 George A Jarvis Biconical electromagnetic horn antenna
US3226722A (en) * 1962-08-17 1965-12-28 Andrew Corp Probe fed pillbox antenna with pattern shaping pins at aperture
DE1516736A1 (de) * 1966-05-13 1969-01-02 Krupp Gmbh Pillbox-Antenne
GB1261587A (en) * 1968-05-21 1972-01-26 Telefunken Patent Aerial system consisting of 2 aerials vertically offset with respect to one another at least the lower one being a crossed direction-finding aerial system
US4876554A (en) * 1988-01-19 1989-10-24 Qualcomm, Inc. Pillbox antenna and antenna assembly
JPH05188128A (ja) * 1991-07-26 1993-07-30 Susumu Sakuma 非常信号の発信及び受信を通じて行う警備方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 17, no. 609 (P - 1640) 9 November 1993 (1993-11-09) *

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0802579A3 (fr) * 1996-04-15 2000-04-26 Nippon Telegraph And Telephone Corporation Antenne de secteurs multiples
US6236376B1 (en) 1998-06-18 2001-05-22 Sivers Lab Ab Suspension device
US7053859B2 (en) 2000-12-19 2006-05-30 Radiant Networks Plc Support structure for antennas, transceiver apparatus and rotary coupling
WO2002050950A1 (fr) * 2000-12-19 2002-06-27 Radiant Networks Plc Structure portante pour antennes, emetteur-recepteur et joint tournant
JP2004520734A (ja) * 2000-12-19 2004-07-08 ラディアント　ネットワークス　ピーエルシー アンテナ支柱構造、送受信装置、及び回転式連結器
GB2435745A (en) * 2001-06-26 2007-09-05 Bae Systems Plc Dual feed antenna with independently rotatable radiation paths
GB2435745B (en) * 2001-06-26 2008-02-06 Bae Systems Plc Dual-feed antenna
US7876278B2 (en) 2001-06-26 2011-01-25 Bae Systems Plc Dual-feed antenna
WO2006049829A2 (fr) 2004-10-27 2006-05-11 Azalea Networks Procede et systeme permettant de creer et de deployer un reseau maille
EP1810530A4 (fr) * 2004-10-27 2012-11-28 Aruba Networks Cayman Procede et systeme permettant de creer et de deployer un reseau maille
WO2007132262A1 (fr) * 2006-05-11 2007-11-22 Bae Systems Plc Antenne multibande empilée
US8063840B2 (en) 2006-05-11 2011-11-22 Bae Systems Plc Antenna operable across multiple frequencies while maintaining substantially uniform beam shape
US8351987B2 (en) 2006-09-27 2013-01-08 Dragonwave, Inc. Wireless network communication apparatus, methods, and integrated antenna structures
US9924385B2 (en) 2015-06-25 2018-03-20 Airspan Networks Inc. Antenna apparatus and method of configuring a transmission beam for the antenna apparatus
GB2539727B (en) * 2015-06-25 2021-05-12 Airspan Ip Holdco Llc A configurable antenna and method of operating such a configurable antenna
US9706419B2 (en) 2015-06-25 2017-07-11 Airspan Networks Inc. Antenna apparatus and method of performing spatial nulling within the antenna apparatus
GB2539727A (en) * 2015-06-25 2016-12-28 Airspan Networks Inc A configurable antenna and method of operating such a configurable antenna
US9973943B2 (en) 2015-06-25 2018-05-15 Airspan Networks Inc. Wireless network configuration using path loss determination between nodes
US11811127B2 (en) 2015-06-25 2023-11-07 Airspan Ip Holdco Llc Wireless network controller and method of controlling a wireless network
WO2016207596A1 (fr) * 2015-06-25 2016-12-29 Airspan Networks Inc. Antenne configurable et procédé de fonctionnement de l'antenne configurable
US10070325B2 (en) 2015-06-25 2018-09-04 Airspan Networks Inc. Sub-sampling antenna elements
US10098018B2 (en) 2015-06-25 2018-10-09 Airspan Networks Inc. Configurable antenna and method of operating such a configurable antenna
US10231139B2 (en) 2015-06-25 2019-03-12 Airspan Networks Inc. Node role assignment in networks
US10257733B2 (en) 2015-06-25 2019-04-09 Airspan Networks Inc. Managing external interference in a wireless network
US10306485B2 (en) 2015-06-25 2019-05-28 Airspan Networks Inc. Configurable antenna and method of operating such a configurable antenna
US10834614B2 (en) 2015-06-25 2020-11-10 Airspan Networks Inc. Quality of service in wireless backhauls
US10667145B2 (en) 2015-06-25 2020-05-26 Airspan Networks Inc. Bearing calculation
GB2557629A (en) * 2016-12-13 2018-06-27 Bae Systems Plc Antenna arrangement
US10656192B2 (en) 2017-01-03 2020-05-19 Universidad Técnica Federico Santa María Device for measuring a wireless radio frequency channel with directional measurement ability (angular)
EP3352295A1 (fr) * 2017-01-18 2018-07-25 BAE SYSTEMS plc Agencement d'antenne
WO2019121094A1 (fr) * 2017-12-22 2019-06-27 Thales Nederland B.V. Agencement d'antennes intégrées
US11600918B2 (en) 2017-12-22 2023-03-07 Thales Nederland B.V. Integrated antenna arrangement
GB2630573A (en) * 2023-05-30 2024-12-04 Kolokotronis Dimitris Self-organizing directional antenna system for radio terminal stations
WO2024246242A1 (fr) 2023-05-30 2024-12-05 Dimitris Kolokotronis Système d'antenne directionnelle à auto-organisation pour stations de terminal radio

Similar Documents

Publication Publication Date Title
WO1994026001A1 (fr) Systemes d'antennes orientables
US6590544B1 (en) Dielectric lens assembly for a feed antenna
JP3982413B2 (ja) アンテナ支柱構造、送受信装置、及び回転式連結器
US8068053B1 (en) Low-profile lens method and apparatus for mechanical steering of aperture antennas
US6204822B1 (en) Multibeam satellite communication antenna
AU736065B2 (en) A terminal and antenna system for constellation of non- geostationary satellites
US4862185A (en) Variable wide angle conical scanning antenna
JP3313636B2 (ja) 低軌道衛星通信用アンテナ装置
MXPA04004432A (es) Red de elementos en fase de banda dual que emplea segundas harmonicas espaciales.
US6396448B1 (en) Scanning directional antenna with lens and reflector assembly
US20040217908A1 (en) Adjustable reflector system for fixed dipole antenna
JPH03106205A (ja) 同軸フィード組立体および同軸二重周波数アンテナフィード組立体
EP1408581A2 (fr) Antenne orientable "offset" à source alimentation fixe
US7019703B2 (en) Antenna with Rotatable Reflector
WO2018096307A1 (fr) Antenne réseau à balayage de fréquence
KR100451639B1 (ko) 다중 주파수 밴드 위성통신 안테나
TW405279B (en) Antenna for communicating with low earth orbit satellite
US20210111499A1 (en) Lens repeater with variable beamwidth
JPH09252216A (ja) アンテナ及び無線通信システム
JP2650234B2 (ja) 屋内通信方式
WO1998015033A1 (fr) Ensemble a lentille dielectrique pour antenne d'alimentation
GB2430557A (en) Circularly polarized loop antenna
JPH06291538A (ja) マイクロ波偏波レンズ装置
WO2006075437A1 (fr) Ensemble antenne, appareil de communication sans fil et radar
KR200284592Y1 (ko) 다중 주파수 밴드 위성 통신 안테나

Legal Events

Date Code Title Description
AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase