EP0052231A1 - Antenne à ondes courtes orientable - Google Patents

Antenne à ondes courtes orientable Download PDF

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Publication number
EP0052231A1
EP0052231A1 EP81108309A EP81108309A EP0052231A1 EP 0052231 A1 EP0052231 A1 EP 0052231A1 EP 81108309 A EP81108309 A EP 81108309A EP 81108309 A EP81108309 A EP 81108309A EP 0052231 A1 EP0052231 A1 EP 0052231A1
Authority
EP
European Patent Office
Prior art keywords
short
holder
rotating antenna
antenna according
wave rotating
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.)
Withdrawn
Application number
EP81108309A
Other languages
German (de)
English (en)
Inventor
Dieter Krausen
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.)
BBC Brown Boveri AG Germany
Original Assignee
BBC Brown Boveri AG Germany
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 BBC Brown Boveri AG Germany filed Critical BBC Brown Boveri AG Germany
Publication of EP0052231A1 publication Critical patent/EP0052231A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01Q3/02—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 movement of antenna or antenna system as a whole
    • H01Q3/04—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 movement of antenna or antenna system as a whole for varying one co-ordinate of the orientation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/062—Two dimensional planar arrays using dipole aerials

Definitions

  • the invention relates to a short-wave rotating antenna with a vertically arranged, fork-shaped frame, which is formed by a bridge with at least two masts, between which at least one grating reflector common to all antennas and on both sides in planes parallel to it, curtain antennas are spanned by means of supporting cables, whereby the bridge is rotatably supported about a vertical axis at a distance from the ground.
  • Such short-wave rotating antennas are suitable for short-wave broadcasting stations with transmitters of high power, which have the task of providing radio coverage to all areas of the world in medium and long distances from the transmitting station with large field strengths.
  • a rotating antenna for the shortwave range is known, wherein the antennas are clamped between a vertically disposed frame.
  • This is formed by a horizontally installed console, on the ends of which two towers are placed.
  • the frame can be rotated around its vertical axis of symmetry using a rotating mechanism.
  • the slewing gear consists of a bearing in the center below the center of gravity of the frame for supporting and guiding the same.
  • a drive is provided between the fixed part and the movable part of the bearing.
  • a disadvantage of this device is the rigid frame because of the fact that the tensioning of the antennas arranged flat between the frame is very complex and difficult.
  • the supporting cables of the antennas are led to the towers and from there deflected downwards by rope pulleys.
  • the hanging ends of the suspension cables are connected to weights to tension the antennas.
  • the space remaining between the frame of the antenna and the floor is very small in this device.
  • a further use of this area for the construction of smaller buildings under the antenna is therefore not possible. This makes the entire system very expensive because additional terrain is required for the construction of outbuildings.
  • the bearing used in this antenna is designed as a thrust ball bearing or roller bearing. It is not particularly suitable for such an antenna, since this bearing cannot completely transmit the forces emanating from the frame into the foundation, so that no rigid, coherent connection is formed between the rotatable part and the foundation.
  • the object of the invention is therefore to create a short-wave rotating antenna which is simple in construction, requires a minimum of floor space and has a maximum of stability and load-bearing capacity.
  • the bridge comprises at least two supports arranged in series, between which at least one holder for fastening at least one rotary connection is arranged, that each support is connected to the holder in an articulated manner and the rotary connection in addition is placed on a fixed tower and fastened to it, and that the ends of the supporting cables holding the curtain antennas are anchored to the masts and fastened thereon.
  • the bracket for the rotary connection provided on the bridge is formed by a thick-walled cylinder. This is provided on the outside on two opposite sides, each with a bracket for articulated connection with a beam forming the bridge. With this cylinder, part of the rotary connection can be screwed in a simple manner and thereby connected to the rotatable part of the antenna.
  • the bracket is arranged between the two carriers.
  • Each carrier is connected to the holder via a joint.
  • the axes of the two joints run parallel to one another and perpendicular to the longitudinal axes of the two beams. In addition, they are arranged horizontally so that they also run parallel to the ground. It is thereby achieved that the carriers can be rotated up or down in a vertical plane. If necessary, the carriers can be rotated so that they are no longer arranged horizontally to one another, but enclose an angle greater or less than 90 ° with the vertical.
  • the girders used to form the bridge are constructed as tubular or angled lattice constructions. It is about this is a particularly stable embodiment, which allows the outward-facing ends of the supports to be loaded with additional weights, in particular the masts, without the risk of kinking.
  • the masts placed on the bridge to form the frame are also designed as tubular or angled grid structures. This is a relatively light, but as already mentioned above, very stable embodiment of components.
  • the bridge is formed by two beams of equal length. The same applies to the two masts placed on the bridge. This creates a symmetrical frame between which the antennas and reflectors can be easily stretched over a surface.
  • the rotary connection fastened to the underside of the holder is placed on a tower, on the top of which a thick-walled cylinder is arranged and held.
  • This cylinder is used to attach the slewing ring to the tower.
  • the tower has four separate supports, which are arranged at a defined distance from one another and whose lower ends are anchored in the ground.
  • the tower is at least 12 to 14 m high and is also designed as a tubular or angled grid construction.
  • the tower is also the option of designing the tower as a truncated cone and pouring it from reinforced concrete.
  • the cylinder placed on the top of the tower is non-positively connected to it and can be screwed to the rotating connection in some areas so that it is also held on the tower.
  • the short-wave rotating antenna according to the invention is designed so that the lower edge of the bridge forming the frame is at least 17 m from the ground.
  • the rotary connection fastened to the bridge and the tower is advantageously designed as a ball rotary connection.
  • This ball slewing ring has two outer and one middle ring.
  • the two outer rings are placed on top of each other and screwed together.
  • the middle ring is mounted in inner recesses of the two outer rings, a spherical ring being arranged between the middle and each outer ring.
  • the two outer rings screwed together are additionally attached to the bracket of the bridge, while the middle ring is fixed to the tower.
  • the middle ring is advantageously screwed to the cylinder installed on the end face of the tower.
  • the articulated mounting of the two brackets that form the bridge guarantees an independent voltage for the antennas and reflectors that are to be stretched between the fork-shaped frame.
  • the suspension cables that hold the antenna and reflectors can therefore be firmly attached to the masts. So far, the antennas and reflectors have been stretched so that their carrying cables leading to the masts have been guided there over rollers and deflected downward, the ends of the carrying cables having been provided with weights. These additional weights are necessary in order to constantly bring about the desired voltage for the antennas suspended over the surface.
  • these weights can be dispensed with, since the supports, because of their articulated mounting, always rotate downwards until the tensile force generated due to their own weight is in balance with the tensile force generated in the supporting cables of the antennas and reflectors.
  • the antenna can be assembled simply and quickly. Due to the independent tensioning of the antennas, the device has a much greater stability than previous short-wave rotating antenna devices.
  • the swivel ball joint is a connecting element which is composed of relatively few mechanically stressed components and is therefore less sensitive than other devices of this type.
  • the vertical forces emanating from the frame of the short-wave rotating antenna are transmitted to the two outer rings of the spherical slewing ring. From there they reach the central ring via the ball rims and from there into the tower.
  • the swivel ball joint thus represents an optimal connection between the rotatable and the fixed part of the short-wave rotating antenna.
  • a base area of approximately 15 x 15 meters is required for the antenna system.
  • the rest of the area below the antenna is freely accessible and accessible.
  • the control and signal processing part of the electric drive is built with electronic devices.
  • the desired azimuth direction is digitally preselected and displayed.
  • the selected commands are stored electronically and are executed automatically after pressing the release button, the direction of rotation corresponding to the shortest path being selected by means of an electronic comparison between the actual value and the setpoint. In this case, the acceleration and deceleration when changing direction is also automatic.
  • a switch to manual drive enables direct control of the drive motors in both directions of rotation and at two different speeds. All important operating states are displayed.
  • the short-wave rotary antenna according to the invention which comprises a frame 1, which is formed by two supports 3 and 4, a holder 5 and two masts 6 and 7, a tower 8, a rotating connection 9, antenna radiator 10 and a reflector 11.
  • the short-wave rotary antenna according to the invention is equipped with a fork-shaped frame 1. This is formed by two horizontally arranged supports 3 and 4.
  • the two supports are of equal length and are designed as tubular or angled grating constructions.
  • the length of the beams 3 and 4 depends on the desired size of the short-wave rotating antenna.
  • a bracket 5 for fastening the rotary connection 9 is arranged between the two supports 3 and 4 arranged horizontally in series.
  • Each of the two supports 3 and 4 is non-positively connected to the holder 5 via a joint 12A, 12B.
  • the holder 5 is a thick-walled cylinder, the outer diameter of which is larger than the width of the supports 3 and 4.
  • the holder 5 is connected to the two supports 3 and 4 on the outside on two opposite sides each provided a boom 5A and 5B.
  • each arm 5A, 5B is provided with two slots 13 and 14. These two slots run parallel to one another and to the two lateral boundary surfaces of the cantilever 5A, 5B.
  • the carrier 3, 4 is extended for articulated connection to the holder 5 by two tabs 3L, 4L.
  • the two tabs 3L, 4L are attached to the end of the carrier 3, 4 facing the holder 5.
  • the two tabs 3L and 4L run parallel to each other. The distance is dimensioned so that in each case a tab 3L or 4L in a slot 13 and 14 of the boom 5 A, 5B may be inserted.
  • the slots 13 and 14 are open at the top and bottom and on the side facing the carrier 3, 4.
  • the brackets 5A and 5B and the tabs 3L and 4L are provided at equivalent locations with through bores in such a way that the hinge axis of the hinge 12A, 12B can be guided through such that it runs perpendicular to the longitudinal axis of the carrier 3, 4.
  • the hinge axes of the two joints 12A, 12B is externally secured to the two lateral boundary surfaces of the boom 5A and 5 B by one or more screws 12S. This connection of the two supports 3 and 4 to the holder 5 ensures that the supports are rotatably supported in a vertical plane up and down.
  • a mast 6, 7 is placed on each of the two outward-facing ends of the two supports 3 and 4 and non-positively connected to the supports 3, 4.
  • the two masts 6 and 7 are of equal length and are constructed as tubular or angular lattice constructions. Together with the bridge 3, 4, 5, they form the fork-shaped frame 1, between which the antenna radiators 10 and the reflector 11 are stretched.
  • the number of antenna radiators spanned within frame 1 is determined by the size of the curtain antennas to be suspended.
  • the size of the frame 1 is preferably chosen so that antennas of different types and frequency ranges up to the size of an antenna of HR 4/4 / 0.5 for 6/7/9/11 MHz can be spanned as desired.
  • the type designation HR 4/4 / 0.5 means that the dipole wall in question consists of 4 horizontal rows, each with two full-wave dipoles (corresponding to four half-wave dipoles).
  • the letter "R" indicates the grating reflector.
  • the standard version of the short-wave rotating antenna is equipped with an antenna HR 4/4 / 0.5 f. 6/7/9/11 MHz and an antenna HR 4/4/1 for 15/17/21/26 MHz.
  • the supporting cables 20 can all antenna antennas 10, which are led to the masts 6 and 7, be attached directly there.
  • the deflection of these ropes via rollers and the additional attachment of weights at the ends of the support ropes is not necessary, since the tension of the antenna radiators 10 arranged between the frame 1 takes place automatically in this short-wave rotating antenna according to the invention.
  • This is done, as already mentioned, by the rotatable mounting of the two supports 3 and 4. Because of their own weight and the weight of the two masts 6 and 7, these are always turned down so far that the tensile forces exerted by them are in balance with the Stand tensile forces that occur in the suspension cables 20 of the curtain antennas.
  • the rotary connection 9 is fastened to the underside of the holder 5, with the aid of which the frame 1 can be rotated around its vertical axis without a stop.
  • This slewing ring 9 is advantageously designed as a ball slewing ring.
  • FIG 3 shows a vertical section through such a ball slewing ring.
  • This rotary ball joint essentially comprises two outer rings 30. These two rings are placed one on top of the other and are non-positively connected to one another, in particular by means of screws 30A.
  • the ball slewing ring has a central ring 31. This is supported with specially designed outer edges in the inner recesses of the two rings 30.
  • a spherical ring 31A is arranged between the middle ring 31 and each of the two outer rings 30.
  • the middle ring 31 of the ball slewing ring 9 is placed on a holder 21 at the top of the tower 8 and screwed to it.
  • This holder 21 preferably also consists of a thick-walled cylinder which is designed in a similar manner to the holder 5.
  • the bracket 21 is non-positively attached to the top of the tower 8.
  • the tower 8 is a tubular or angular lattice construction with four legs, the lower ends of which are anchored in the building ground. Instead of the tower 8, which is designed as a tubular or angular lattice structure, a truncated cone cast and reinforced with concrete can also be used.
  • the height of the tower 8 is such that the lower edges of the two beams 3 and 4 are at a minimum distance of 17 meters from the floor.
  • the antenna antennas 10 are supplied from the center.
  • the short-wave rotating antenna has a symmetrical 300 ohm input 22, which is guided into the center of the fixed tower 8 at a height of approximately 3.6 meters above the ground.
  • the total height of tower 8 is about 15 meters.
  • a symmetrical feed line 23 leads to the contacts of an antenna selector switch (not shown here).
  • FIG. 1 shows, the space between the floor and the lower end of the frame is freely accessible and accessible. If necessary, buildings can be erected at the height of tower 8 below frame 1.
  • a non-positive connection between the frame 1 and the tower 8 is produced by the ball slewing ring 9.
  • the short-wave rotating antenna can be swiveled in any azimuth direction with an accuracy of + 1 ° using a remote control (not shown here). Since no mechanical stops limit the range of rotation, the antenna can be aligned to the new target area by the shortest route. In the worst case, a time of 3 minutes is required.
  • the ball slewing ring is driven by at least one electric motor (not shown here). This outputs its power, for example, via a pinion (not shown here) to a ring gear which is arranged in the region of the two outer rings 30 of the ball slewing ring.
  • electro-hydraulically actuable locking devices (not shown here) are provided, which are inserted into the toothing of the ring gear and thus mechanically fix the rotating system.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)
  • Rotational Drive Of Disk (AREA)
  • Catching Or Destruction (AREA)
  • Glass Compositions (AREA)
EP81108309A 1980-11-13 1981-10-14 Antenne à ondes courtes orientable Withdrawn EP0052231A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3042738 1980-11-13
DE19803042738 DE3042738A1 (de) 1980-11-13 1980-11-13 Kurzwellendrehantenne

Publications (1)

Publication Number Publication Date
EP0052231A1 true EP0052231A1 (fr) 1982-05-26

Family

ID=6116624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108309A Withdrawn EP0052231A1 (fr) 1980-11-13 1981-10-14 Antenne à ondes courtes orientable

Country Status (3)

Country Link
EP (1) EP0052231A1 (fr)
DE (1) DE3042738A1 (fr)
NO (1) NO813833L (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2591804A1 (fr) * 1985-12-17 1987-06-19 Thomson Csf Antenne rotative a ligne d'alimentation prevue pour etre vrillee
US5515063A (en) * 1993-10-15 1996-05-07 Thomson-Csf Broadcasting set comprising a rigid-dipole rotary antenna and rotating joint designed for this set

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4226732A1 (de) * 1992-08-13 1994-02-17 Abb Patent Gmbh Kurzwellen-Vorhang-Sendeantenne

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1926319A1 (de) * 1968-05-27 1969-12-18 Granger Associates Antennensystem
DE2337997A1 (de) * 1973-07-24 1975-02-13 Licentia Gmbh Kurzwellen-vorhangantenne
DE2745852A1 (de) * 1977-10-12 1979-04-19 Peiner Masch Schrauben Drehantenne
EP0002233A1 (fr) * 1977-11-24 1979-06-13 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Support d'antenne tournante pour ondes courtes
DE2852345A1 (de) * 1977-11-24 1980-06-12 Bbc Brown Boveri & Cie Kurzwellen-drehantennen-stand

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1926319A1 (de) * 1968-05-27 1969-12-18 Granger Associates Antennensystem
DE2337997A1 (de) * 1973-07-24 1975-02-13 Licentia Gmbh Kurzwellen-vorhangantenne
DE2745852A1 (de) * 1977-10-12 1979-04-19 Peiner Masch Schrauben Drehantenne
EP0002233A1 (fr) * 1977-11-24 1979-06-13 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Support d'antenne tournante pour ondes courtes
DE2852345A1 (de) * 1977-11-24 1980-06-12 Bbc Brown Boveri & Cie Kurzwellen-drehantennen-stand

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FUNKSCHAU 1980, Nr. 8 M}nchen "Drehbare Vorhangantenne f}r acht Kurzwellen-Rundfunkb{nder" Seiten 105 bis 106 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2591804A1 (fr) * 1985-12-17 1987-06-19 Thomson Csf Antenne rotative a ligne d'alimentation prevue pour etre vrillee
EP0230183A1 (fr) * 1985-12-17 1987-07-29 Thomson-Csf Antenne rotative à ligne d'alimentation prévue pour être vrillée
US5515063A (en) * 1993-10-15 1996-05-07 Thomson-Csf Broadcasting set comprising a rigid-dipole rotary antenna and rotating joint designed for this set

Also Published As

Publication number Publication date
NO813833L (no) 1982-05-14
DE3042738A1 (de) 1982-06-24

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): BE CH FR GB NL SE

17P Request for examination filed

Effective date: 19821030

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19840501

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KRAUSEN, DIETER