EP3987609A1 - Antenne à grille - Google Patents

Antenne à grille

Info

Publication number
EP3987609A1
EP3987609A1 EP20826410.1A EP20826410A EP3987609A1 EP 3987609 A1 EP3987609 A1 EP 3987609A1 EP 20826410 A EP20826410 A EP 20826410A EP 3987609 A1 EP3987609 A1 EP 3987609A1
Authority
EP
European Patent Office
Prior art keywords
grid
antenna
foot
dipole
reflector
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP20826410.1A
Other languages
German (de)
English (en)
Other versions
EP3987609A4 (fr
Inventor
Jean-Pierre Julius CONFAIT
Anthony Aaron BICK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3987609A1 publication Critical patent/EP3987609A1/fr
Publication of EP3987609A4 publication Critical patent/EP3987609A4/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H01Q19/108—Combination of a dipole with a plane reflecting surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1235—Collapsible supports; Means for erecting a rigid antenna
    • 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
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines

Definitions

  • the invention relates to a grid-type antenna for receiving satellite television transmissions and more specifically to such an antenna which receives ultra-high frequency (UHF) transmission signals.
  • UHF ultra-high frequency
  • These antennae are provided with a reflector of grid construction and additional components that are mounted to and/or supported from the reflector to make up an assembled product.
  • the assembly includes an arrangement of dipoles supported in spaced apart relationship to the grid of the reflector. These grid-type antennae or aerials commonly use either two or four dipole arrangements positioned in front of the reflector. The dipoles are used to receive the UHF signals.
  • the dipoles are connected to a printed circuit board (PCB) that will include a balun.
  • An F connector provides the interface between the PCB and a coax cable.
  • the balun is a device that serves to match the balanced (i.e. symmetrical) dipole to the unbalanced (i.e. asymmetric, signal and earth) coax cable.
  • antennae need to be packaged for supply to consumers or end users.
  • the components of the antennae may be supplied in a part-assembled condition to facilitate packing in a reduced size or more compact form of packaging.
  • the packaged product will usually be shipped or transported as container loads. Thereafter, further distribution may take place as truck/trailer loads.
  • an antenna preferably a UHF antenna for satellite television, comprising having a grid-type reflector and including: a. an array of dipole elements mounted onto two spaced apart, insulated supports that extend to a front side of the reflector;
  • the supports each having a foot to engage the reflector
  • the reflector comprising (at least) two separate grid components that are releasably securable in relation to each other:
  • the invention further provides for an antenna as defined in which at least one of the two grid components is releasably securable to the foot of each support: for release of the at least one grid component and positioning of the two grid components in the overlapping, packing arrangement; and to rigidly secure the at least one grid component to the foot of each support with the two grid components in the extended condition.
  • the invention further provides for an antenna as defined in which the two separate grid components are both releasably securable to the foot of each support: for release of the two grid components and positioning of the two grid components in the overlapping, packing arrangement; and to rigidly secure the at least one grid component to the foot of each support with the two grid components in the extended condition.
  • the invention further provides for an antenna as defined in which:
  • the dipole elements are removably securable to the two spaced apart supports and extend to a first side and to a second side of the two supports and the two grid components are respectively securable to extend to the first side and to the second side of the two supports;
  • the at least one grid component is hingedly retained to the foot of each support;
  • the two grid components are releasably securable to the foot of each support with a clamping plate.
  • each support includes inner and outer spaced apart shoulders, for engagement with one of the grid components, with at least the outer shoulder having a lip; each grid component includes an inner bar at an inner edge of the grid component and a securing bar, with a space between the inner bar and securing bar corresponding substantially to a space between the inner and outer shoulders; and the clamping plate is provided adjacent the inner shoulder to at least partially overlie the inner bar and bias the inner bar and the securing bar against the inner and outer spaced apart shoulders respectively.
  • the invention further provides for an antenna as defined in which:
  • the clamping plate has an opening for a biasing screw that engages the foot of the support between two inner shoulders arranged to engage the inner bars of the two grid components;
  • the inner and outer shoulders are provided by two mounting flanges on the foot of each support;
  • the two mounting flanges are each provided with an aligned recess that accommodates a crossbar extending from the inner bar to the securing bar.
  • the invention further provides for an antenna as defined in which:
  • each support includes a connector for engagement with two pairs of removably securable dipole elements
  • each pair of dipole elements is provided by a dipole assembly comprising a V- shaped rod providing two dipole elements with a mounting plate fixed adjacent an apex where the two dipole elements converge, the mounting plate providing a web between the two dipole elements having an opening for a tightening screw;
  • the mounting plate includes two integral connecting flanges that extend from the web and are pressed into engagement around each of the two dipole elements respectively and in which the connecting flanges of the mounting plate extend around an outside of the two dipole elements and are folded inwardly to an inside of the two dipole elements;
  • the tightening screw is rotatably retained within the opening in the web
  • a first portion of the tightening screw adjacent a head of the tightening screw is located inside the opening in the web and the opening in the web is provided with an interference fit to resist passage of a second portion of the tightening screw that carries a screw-thread;
  • the opening in the web is provided with a toothed or notched profile
  • a stop washer is secured onto the tightening screw with the web located between the stop washer and a head of the tightening screw; and/or the stop washer is provided by a resiliently deformable O-ring that engages with an interference fit onto the tightening screw.
  • an antenna having a grid-type reflector and including: a. an array of dipole elements mounted onto two spaced apart, insulated supports that extend to a front side of the reflector;
  • the supports each having a foot to engage the reflector
  • the reflector comprising two separate grid components that provide a working grid assembly with the two grid components engaged with the foot of each support; f. at least one of the two grid components releasably securable to the foot of each support:
  • a dipole assembly for an antenna having a grid-type reflector comprising a V-shaped rod providing two dipole elements with a mounting plate fixed adjacent an apex where the two dipole elements converge with the mounting plate providing a web between the two dipole elements having an opening for a tightening screw which is rotatably retained relative to the web.
  • the invention further provides for a dipole assembly as defined in which: the mounting plate includes two integral connecting flanges that extend from the web and are pressed into engagement around each of the two dipole elements respectively and in which the connecting flanges of the mounting plate extend around an outside of the two dipole elements and are folded inwardly to an inside of the two dipole elements;
  • a first portion of the tightening screw adjacent a head of the tightening screw is located inside the opening in the web and the opening in the web is provided with an interference fit to resist passage of a second portion of the tightening screw that carries a screw-thread;
  • a stop washer is secured onto the tightening screw with the web located between the stop washer and a head of the tightening screw.
  • Figure 1 shows a perspective view of an assembled antenna having a grid-type reflector
  • Figure 2 shows a rear perspective view of the antenna in Figure 1 ;
  • Figure 3 shows an exploded perspective view of an insulated support
  • Figure 4 shows a rear view of the antenna with one grid component of the reflector folded across into an overlapping position with the other grid component;
  • Figure 5 shows an enlarged perspective view of the section marked by broken lines on Figure 4;
  • Figure 6 shows an enlarged rear perspective view of a portion of the antenna with the grid components secured in an extended condition to a foot of a support
  • Figure 7 shows a front perspective view of a dipole assembly
  • Figure 8 shows a part cross-sectional plan view of the dipole assembly secured to an insulated connector of a support
  • Figure 9 shows a rear view of the components shown in Figure 8.
  • the antenna (1 ) is of the ultra-high frequency (UHF) signal receiving type that is used for satellite television and has a grid-type reflector (2) and an array of dipole elements (3).
  • UHF ultra-high frequency
  • the dipole elements (3) are mounted onto two spaced apart, insulated supports (4) that extend to a front side of the reflector (2).
  • a pair of parallel dipole connecting rods (5) extend between the supports (4) with an insulated housing (6) for a printed circuit board (PCB - not shown) secured between the rods (5).
  • An output connection (7) for a coax cable protrudes from a rear side of the housing (6).
  • Each support (4) includes a foot (8) to engage the reflector (2) at one (rear) end and a connector (9) for engagement with two pairs of removably securable dipole elements (3) at the other (front) end.
  • a spacer (10) extends between the foot (8) and the connector (9).
  • the foot (8) is moulded integrally with the spacer (10) and a fastening screw (11 ) secures the connector (9) in place onto the spacer (10).
  • the reflector (2) comprises two separate grid components (2.1 ; 2.2) that are releasably securable in relation to each other.
  • the two separate grid components (2.1 ; 2.2) are both releasably securable to the foot (8) of each support (4).
  • the dipole elements (3) are removably securable to the two spaced apart supports (4) and extend to a first side and to a second side of the two supports (4).
  • the two grid components (2.1 ; 2.2) are also securable to extend to the first side and to the second side of the two supports (4) respectively and thus correspondingly arranged when the reflector (2) is assembled.
  • the two grid components (2.1 ; 2.2) will be referred to as the first grid component (2.1 ) and the second grid component (2.2) in what follows.
  • the antenna (1 ) is not limited to an orientation where the first and second sides correspond to the horizontal and may, in use, be mounted in various positions.
  • the releasable engagement of the two grid components (2.1 ; 2.2) serves to provide for a compact packing arrangement of the antenna (1 ) prior to assembly.
  • the two grid components (2.1 ; 2.2) are released, they can be position in an overlapping, packing arrangement relative to each other - see Figures 4 and 5.
  • the two grid components (2.1 ; 2.2) are rigidly secured in an extended condition relative to each other and to the foot (8) of each support (4), providing a working grid assembly of the reflector (2). This is shown in Figures 1 , 2, 3 and 6.
  • the fixed grid can be riveted or otherwise anchored to the foot of each support while the other may be releasably clamped with a mechanism similar to that described with reference to the drawings.
  • both grid components (2.1 ; 2.2) are hingedly retained to the foot (8) of each support (4) by a clamping plate (12).
  • the foot (8) of each support (4) includes inwardly disposed and spaced apart inner (13) and outer (14) shoulders, provided by four mounting flanges (13; 14), for engagement with each of the grid components (2.1 ; 2.2).
  • a locating groove (15.1 ) for the inner bar (16) is provided at the base of the inner shoulder (13) and the outer shoulder (14) has a lip (15.2).
  • Each grid component (2.1 ; 2.2) includes an inner bar (16) at an inner edge of the grid component (2.1 ; 2.2) and a securing bar (17).
  • a space between the inner bar (16) and securing bar (17) are provided to correspond substantially to a space between the inner shoulder (13) and outer shoulder (14).
  • the clamping plate (12) is located adjacent and between two inner shoulders (13) and provided to partially overlie the two inner bars (16).
  • the clamping plate (12) has an opening (not shown) for a biasing screw (18) that engages the foot (8) of the support (4) between two inner shoulders (13).
  • the biasing screw (18) is used to connect the clamping plate (12) to the foot (8) over the inner bars (16). With edges of the clamping plate (12) supported in close proximity to the inner shoulders (13), the two grid components (2.1 ; 2.2) are movably retained in relation to each foot (8).
  • the inner bar (16) can move under the clamping plate (12) towards the biasing screw (18). This allows the securing bar (17) to move past the lip (15.2) on the outer shoulder (14).
  • the grid components (2.1 ; 2.2) can be hinged relative to the supports (4).
  • the biasing screws (18) have a large head that can be gripped with a thumb and forefinger. Alternative, heads that afford ease of tightening may also be used. Screwdriver slots are also included to apply additional torque.
  • the four mounting flanges (13; 14) are each provided with an aligned recess (19) that accommodates a crossbar (20) extending from the inner bar (16) to the securing bar (17).
  • the location of the crossbars (20) inside the recesses (19) provides for an accurate alignment of the grid components (2.1 ; 2.2) and affords additional rigidity.
  • the eight dipole elements (3) are provided by four dipole assemblies (21 ) as shown in Figures 7 and 8.
  • Each dipole assembly (21 ) comprises a V-shaped rod (22) providing two dipole elements (3).
  • the dipole assembly (21 ) includes a mounting plate (23) fixed adjacent an apex where the two dipole elements (3) converge.
  • the mounting plate (23) provides a web (24) between the two dipole elements (3) having an opening (25) for a tightening screw (26) which is rotatably retained relative to the web (24).
  • the mounting plate (23) has two integral connecting flanges (27) that extend from the web (24) and are pressed into engagement around each of the two dipole elements (3) respectively.
  • the connecting flanges (27) are arranged to extend around an outside of the V-shaped rod (22) and are folded inwardly, in a curve over and to an inside of the two dipole elements (3).
  • Retaining means to hold the tightening screw (26) captive while still affording rotation in the opening (25) of the web (24) may be provided in various forms.
  • a stop washer (28) is secured onto the tightening screw (26) with the web (24) located between the stop washer (28) and a head (29) of the tightening screw (26).
  • the stop washer is provided by a resiliently deformable O-ring (28) that engages with an interference fit onto the tightening screw (26).
  • the heads (29) on the tightening screws (26) have wing formations for ease of tightening.
  • Alternative heads may also be employed.
  • a first portion of the tightening screw adjacent the head is located inside the opening which will have an interference fit to resist passage of a second portion of the tightening screw that carries a screw-thread.
  • the opening in the web may, for example, be provided with a toothed or notched profile.
  • the connector (9) has two screw holes (30) which each extend into a bore having a hex profile to retain a nut (31 ) that receives the tightening screw (26).
  • a central bore also has a third screw hole (32) that receives the fastening screw (1 1 ) from the opposite, front side of the connector (9) for mounting onto the spacer (10).
  • the fastening screw (1 1 ) engages into a sleeve (33) that extends from a square profile head (34) that fits into a square socket (35) on the rear side of the connector (9).
  • Three caps (36) are provided with a press fit into the bores to conceal the internal connecting parts.
  • the connector (9) is also provided with two spaced apart recesses (37) for location of each of the dipole connecting rods (5).
  • the same two moulded components as shown in Figure 3 are used for both supports (4) which are arranged opposite to each other.
  • the opposite arrangement places the recesses (37) and (19) in a required position for engagement with the connecting rods (5) and crossbars (20).
  • the grid components (2.1 ) and (2.2) are also of the same construction and oppositely arranged. The duplicate use of these corresponding parts reduces the tasks in a manufacture line.
  • the antenna (1 ) of the current embodiment provides a desirable degree of rigidity and structural integrity, particularly along a central region of the reflector (2) and given the use of two separate grid components (2.1 ; 2.2).
  • the parallel dipole connecting rods (5) provide a box-structure in this central region and brace the supports (4) for added rigidity.
  • the antenna is part assembled for packaging as described below:
  • the two grid components (2.1 ; 2.2) will folded in an overlapping, packing arrangement as shown in Figures 4 and 5. In this condition, the two grid components (2.1 ; 2.2) are hingedly retained by the clamping plates (12) that are secured to each foot (8) by the biasing screws (18).
  • the four dipole assemblies (21 ) will, in this example, be provided loose in the packaging as shown in Figure 7.
  • the benefit of the fixed mounting plate (23) and captive tightening screw (26) as part of the dipole assembly (21 ) provides for only four parts that are conveniently secured to the connectors (9).
  • the two dipole connecting rods (5) will be pre-fastened to the PCB housing (6), using two clamping nuts that fit onto conductive screws extending from the PCB through the housing (6).
  • the inner bar (16) and the securing bar (17) are located against the inner and outer spaced apart shoulders (13; 14) respectively, with the inner bar (16) located in the groove (15.1 ), and the biasing screw (18) is tightened to close the clamping plate (12) towards the foot (8).
  • the region along underside at edges of the clamping plate (12) is provided with an inclined surface or bevel that biases the inner bar (16) and consequently the outer bar into engagement with the four mounting flanges (13; 14).
  • the inner bar (16) is clamped in the groove (15.1 ) and the securing bar (17) is locked under the lip (15.2) of the outer shoulder (14) and the grid components (2.1 ; 2.2) rigidly supported in the extended condition.
  • the product construction and proposed packaging arrangement simply requires fitment of the dipole elements into the dipole connector assemblies and fixing of the two grid components in the outward, extended condition. It will be appreciated that the same antenna components can be packaged in a number of different ways and may only include a minimal amount of pre-assembly.
  • the clamping plates may have rotatably retained/captive biasing screws to reduce the number of loose parts where these are not pre-fitted to the foot of each support.
  • the antenna of the current embodiment when assembled provides a desirable degree of rigidity and structural integrity, particularly along a central region of the reflector and given the use of two separate grid components.
  • the parallel dipole connecting rods provide a box-structure in this central region and brace the spacers for added rigidity.
  • the invention disclosed serves to provide added convenience in the assembly of the antenna for installation.
  • the grid reflector of the invention can be assembled from its packaged configuration in a relatively easy, convenient and effective manner.
  • Each of the two grid components are about half the size of the working grid assembly of the reflector when secured in an expanded condition.
  • the parts of the antenna can be packaged into a much smaller box than those used for an integral grid-type antenna which has a single fixed and rigid reflector grid.
  • the reflector in accordance with the invention may accordingly be constructed from different arrangements of grid components which provide a required grid-type reflector body having at least two components that can be packed in an overlapping arrangement and can be secured in relation to each other in an expanded condition.
  • a pair of wing components may be hingedly connected to a central grid component.
  • the wing components will provide oppositely disposed extensions of the central component and folded closed in overlapping relationship against the central component
  • the reflector may include two grid components that are hingedly connected two components are separate and securable with a fastening mechanism.
  • the two or three grid components are securable in the expanded condition with a plurality of fastening mechanisms to be braced in a rigid and tightened configuration before the antenna is installed.
  • Other examples will be within the design competence of a person skilled in the art.

Landscapes

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

Abstract

L'invention concerne une antenne de télévision à ultra haute fréquence (1) comprenant un réflecteur de type grille (2) et un réseau d'éléments dipôles (3) montés sur deux supports isolés et espacés (4). Le réflecteur comprend au moins deux composants de grille séparés qui peuvent être fixés de manière amovible l'un par rapport à l'autre afin de permettre un agencement d'emballage en chevauchement des composants de grille. Lors de l'utilisation, les composants de grille sont fixés de manière rigide dans un état étendu afin de fournir un ensemble grille de travail du réflecteur. Chaque paire d'éléments dipôles est fournie par un ensemble dipôle comprenant une tige en forme de V présentant une plaque de montage fixe et une vis de serrage captive.
EP20826410.1A 2019-06-21 2020-05-18 Antenne à grille Pending EP3987609A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ZA201904019 2019-06-21
ZA201904875 2019-07-25
PCT/IB2020/054700 WO2020254886A1 (fr) 2019-06-21 2020-05-18 Antenne à grille

Publications (2)

Publication Number Publication Date
EP3987609A1 true EP3987609A1 (fr) 2022-04-27
EP3987609A4 EP3987609A4 (fr) 2023-07-26

Family

ID=74040710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20826410.1A Pending EP3987609A4 (fr) 2019-06-21 2020-05-18 Antenne à grille

Country Status (4)

Country Link
EP (1) EP3987609A4 (fr)
CN (1) CN113196564A (fr)
WO (1) WO2020254886A1 (fr)
ZA (1) ZA202200954B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022249045A1 (fr) * 2021-05-24 2022-12-01 FANAROFF, Stanley Support pour connecteur dipôle
WO2023139546A1 (fr) * 2022-01-21 2023-07-27 FANAROFF, Stanley Antenne à grille
CN117039427B (zh) * 2023-10-08 2023-12-19 成都国恒空间技术工程股份有限公司 一种可调全息超材料天线结构
CN117650402B (zh) * 2024-01-29 2024-04-26 西安欣创电子技术有限公司 一种应用于可变距相控阵天线的射频模块组合

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3373432A (en) * 1965-06-10 1968-03-12 Walter E. Breneman Ultrahigh-frequency television antenna
DE1591013C3 (de) * 1967-10-26 1979-03-01 Robert Bosch Gmbh, 7000 Stuttgart Fernsehempfangsantenne für den UHF-Bereich
US4114163A (en) 1976-12-06 1978-09-12 The United States Of America As Represented By The Secretary Of The Army L-band radar antenna array
JPS55171107U (fr) * 1979-05-25 1980-12-08 Hitachi Cable
SE511079C2 (sv) 1996-04-29 1999-08-02 Radio Design Innovation Tj Ab Modulärt antennsystem med en sluten ring av antennpaneler
US9059507B2 (en) * 2011-11-04 2015-06-16 Antennas Direct, Inc. Antenna assemblies including antenna elements with dielectric for forming closed bow tie shapes
EP2621014A1 (fr) * 2012-01-24 2013-07-31 Angel Iglesias, S.A. Système et procédé pour réduire les interférences dans des systèmes de réception de signaux de télévision

Also Published As

Publication number Publication date
EP3987609A4 (fr) 2023-07-26
WO2020254886A1 (fr) 2020-12-24
CN113196564A (zh) 2021-07-30
ZA202200954B (en) 2024-02-28

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