EP0918367A2 - Système de poursuite et méthode pour aligner une pivotante antenne à réflecteur avec une source de rayonnement - Google Patents

Système de poursuite et méthode pour aligner une pivotante antenne à réflecteur avec une source de rayonnement Download PDF

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Publication number
EP0918367A2
EP0918367A2 EP98119823A EP98119823A EP0918367A2 EP 0918367 A2 EP0918367 A2 EP 0918367A2 EP 98119823 A EP98119823 A EP 98119823A EP 98119823 A EP98119823 A EP 98119823A EP 0918367 A2 EP0918367 A2 EP 0918367A2
Authority
EP
European Patent Office
Prior art keywords
reflector
tracking system
antenna
reflector antenna
subreflector
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Withdrawn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
EP98119823A
Other languages
German (de)
English (en)
Other versions
EP0918367A3 (fr
Inventor
Bernd Rümmeli
Brian Scott
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.)
RR ELECTRONIC GmbH
Original Assignee
Rr Elektronische Gerate & Co KG GmbH
RR Elektronische Geraete GmbH and Co KG
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
Priority claimed from DE19757992A external-priority patent/DE19757992A1/de
Application filed by Rr Elektronische Gerate & Co KG GmbH, RR Elektronische Geraete GmbH and Co KG filed Critical Rr Elektronische Gerate & Co KG GmbH
Publication of EP0918367A2 publication Critical patent/EP0918367A2/fr
Publication of EP0918367A3 publication Critical patent/EP0918367A3/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Withdrawn legal-status Critical Current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
    • 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
    • H01Q19/134—Rear-feeds; Splash plate feeds
    • 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
    • H01Q19/18—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 having two or more spaced reflecting surfaces
    • H01Q19/19—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 having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
    • 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
    • H01Q3/08—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 two co-ordinates of the orientation
    • 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

  • the invention relates to a tracking system for alignment a reflector antenna on an electromagnetic radiation source, with one reflector and one the reflector upstream rotatable subreflector, through which of the Reflector reflected radiation from the electromagnetic Radiation source is steerable on a receiving element, and by the trigger signals for a signal measurement of the reflected Radiation can be generated.
  • the invention further relates to a method for alignment a swiveling reflector antenna on an electromagnetic Radiation source at which from the reflector reflective radiation of the radiation source on a Reflecting upstream rotating sub-reflector reflected and from this is passed to a receiving element, wherein after predetermined angular rotations of the sub-reflector trigger signals generated and the signal strength of that from the subreflector reflected radiation is measured and the measured Signal values are saved and used to generate a correction signal be compared with that of the reflector antenna pivoting motors are controllable.
  • Such a tracking system is known from US Pat. No. 5,457,464 Aligning a reflector antenna with an electromagnetic one Radiation source known.
  • the reflector of the reflector antenna is a rotatable or transverse to its longitudinal axis pivotable subreflector in front, through which of the Reflector reflects radiation onto a receiving element is conductive.
  • the subreflector is used as an interrupter or attenuator educated.
  • the subreflector has one or several eccentric windows, the areas of the reflector interrupt or weaken reflected radiation.
  • the breaker consists of a pair of reflective Panes in which the windows are arranged.
  • Radiation areas interrupted or weakened by the windows point opposite to each other Windows in the event of a misalignment Radiation levels or measurement signals.
  • the selected measurement signals are saved and compared by a comparator compared, producing a correction signal that controls motors that track the reflector or align.
  • a disadvantage of the known system is that the subreflector or the interrupter is relatively complex or complicated is and the tracking system only received signals can weaken.
  • the known system requires a so-called orthomode transducer, that is, a transmitter that has an offset of approximately 90 ° or two receiver elements that are perpendicular to each other to make a rotation error to be able to compensate.
  • the object of the present invention is therefore the subreflector to improve so that it is constructed more simply and generates cheaper measurement signals.
  • the object is achieved in that the Subreflector compared to the reflector by an offset angle is inclined.
  • the reflector is designed as a section of a paraboloid.
  • the subreflector is on its side facing the reflector Convex side.
  • the receiving element is on the the back of the reflector facing away from the radiation source arranged.
  • Located between the sub-reflector and the receiving element a guide tube guiding the radiation.
  • the modified reflector antenna corresponds to the essentially a Cassegrain type.
  • Polarator arranged as a the radiation influencing between the sub-reflector and the receiving element, is excited by an AC voltage, coil is formed.
  • Two trigger signals can be generated by the polarator for sampling and storing to be compared Radiation intensity values can be used.
  • the reflector antenna for signal line with a first coaxial cable connected in the vertical direction is brought up to the reflector antenna from below and with a second coaxial cable connected in vertical Directed from above to the reflector antenna becomes. Due to the arrangement of the two coaxial cables according to the invention the task is solved, two coaxial cables like this to arrange that they rotate when the reflector antenna do not influence each other mechanically. By using it of the two coaxial cables it is still possible for example from a low-noise block converter arranged on the reflector upcoming horizontal and vertical Forward signals in separate coaxial cables means horizontal signals are in one and vertical signals Signals passed in the other coaxial cable.
  • the second coaxial cable is via a reflector antenna spanning radome, but can also by other mechanical mounts, for example one Brackets are fed.
  • the second coaxial cable has a first end connectable with the reflector antenna and with one of the first End facing away from the second end rotatable with the radome or one on the inside facing the reflector antenna of the radome down coaxial line connected.
  • the second coaxial cable is guided through the guide bracket and opposite the reflector antenna and the first coaxial cable held in a defined position. At the same time strain relief of the coaxial cable is achieved by the guide bracket reached.
  • the second coaxial cable is thus together rotatable with the reflector antenna without limitation.
  • Such an approach to separate coaxial cables from each other opposite directions is basically in all rotatable antennas possible by a radome or by other means, e.g. B. a bracket spanned become.
  • the power is transmitted to supply the reflector antenna, especially the control electronics and the Control motors, between a fixed antenna base and a rotatable antenna base via a transformer with rotatable primary windings Secondary windings.
  • rotatable secondary windings of a transformer can be non-contact, without using slip rings safe and low-interference power transmission.
  • the power transmission is practically maintenance-free.
  • the reflector antenna or the tracking system is on a vehicle, for example a ship.
  • the misalignment of the reflector antenna due to the swell of the The tracking system enables ships to move quickly and safely be balanced.
  • Another object of the present invention is therefore to improve the known method so that the quality the measurement signals is increased and the rotation of the sub-reflector also affects the main beam.
  • the object is achieved in that the Radiation reflected by the sub-reflector due to an inclination of the sub-reflector compared to the reflector, when rotating of the sub-reflector deflected on a predetermined path becomes.
  • a signal derivative from the reflector antenna at least two in separate directions from the reflector antenna routed coaxial cable.
  • the reflector antenna is powered via a transformer whose secondary windings are opposite fixed primary windings can rotate.
  • a tracking system (1) essentially consists of a reflector antenna (2) on an electromagnetic radiation source (3) can be aligned.
  • the reflector antenna (2) consists essentially of a reflector (4) and one, the reflector (4) towards the radiation source (3) upstream rotatable subreflector (5).
  • a receiving element (7) is arranged centrally.
  • the reflector (4) is designed as a section of a paraboloid. In principle, however, it is also possible to use the reflector (4) to be flat.
  • the subreflector (5) is at that Reflector (4) facing side is convex. Form of the sub-reflector (5) depending on the shape of the Reflector (4) selected.
  • the subreflector (5) is opposite to that Longitudinal axis (8) of the reflector (4) or with respect to a vertical (9) on the longitudinal axis (8) by an offset angle (10) inclined.
  • the subreflector (5) is from one not shown Motor rotatable about a subreflector axis (11). Between the Subreflector (5) and the receiving element (7) is a Radiation or a main beam (12) guide tube (13) arranged.
  • a polarator (14) is arranged.
  • the polarator (14) is as one the radiation between the sub-reflector (5) and the receiving element (7) influencing coil formed.
  • the coil is from one AC excitable. Due to the polarator (14) received radiation by approx. 5 ° with respect to the longitudinal axis (8) tiltable.
  • Two trigger signals can be generated by the polarator (14), those for scanning and storing or holding the signal values of the radiation intensity to be compared with one another are usable.
  • the radiation source (3) is as a transmitter of a television satellite educated. But it is also possible, for example, the Radiation source (3) as a transmitter of a navigation satellite to train.
  • the reflector antenna (2) can, for example, on a vehicle be arranged.
  • the vehicle can also be used as Be trained ship.
  • the reflector antenna (2) is with a known, not shown Swivel device connected.
  • the swivel device consists of a holder for the reflector antenna (2) whose help the reflector antenna (2) of motors, for example Stepper motors, can be pivoted.
  • a first engine swivels the reflector antenna (2) around a vertical axis (15) and a second motor swivels the reflector antenna (2) about a horizontal axis (16).
  • the engines are out of the Signal measurement obtainable control data or by a correction signal controllable.
  • the reflector antenna (2) or the adjustment device can be connected via a compass the control signals to compensate for a change in direction of the Vehicle can be generated.
  • the reflector antenna (2 ') is spanned by one Radome (17) protected.
  • the radome (17) consists of a for electromagnetic waves permeable dome-shaped plastic cladding.
  • the highest point (18) of the radome (17) is approximately in Extension of the vertical axis of rotation (15 ') of the reflector antenna (2 ').
  • a converter a so-called low-noise block converter (19) or LNB forms that arranged on the rear of the reflector (4 ') Receiving element (7).
  • the reflector antenna (2 ') is connected to the signal line with a first one Coaxial cable (20) connectable in the vertical direction can be brought up from below to the reflector antenna (2 ').
  • a guide bracket is located between the radome (17) and the reflector antenna (2 ') (21) arranged.
  • the guide bracket (21) is with a first end (22) with the reflector antenna (2 ') on one rotatable antenna base (23 ') connected. That the first end (22) facing away from the second end (24) of the guide bracket (21) at the highest point (18) of the radome (17) rotatable with the radome (17) connected.
  • the reflector antenna (2 ') is with a second Coaxial cable (25) in the vertical direction from above the reflector antenna (2 ') is connected.
  • the second coaxial cable (25) with its the reflector antenna (2 ') facing first end (26) approximately radial to the vertical Axis (15 ') connected to the rotatable antenna base (23).
  • the second coaxial cable (25) is the first End (26) facing away from the second end (27) rotatable with one the inside (28) of the reflector antenna (2 ') facing the Radoms (17) down coaxial line (29) connected.
  • the second coaxial cable (25) is along the guide bracket (21) guided.
  • the first end (26) of the second coaxial cable (25) is via a plug connection (30) with one on the rotatable Antenna base (23) arranged second output (31) of the low-noise block converter (19) connected.
  • the second end (27) of the second coaxial cable (25) has a plug connector (32) on, the rotatable with a corresponding on the radome (17) arranged counterpart (33) which is connected at one end the coaxial line (29) is connected.
  • the connector (32) is for example as an SMB connector and the counterpart (33) as SMB socket trained.
  • a first end (34) of the first coaxial cable (20) is over a plug connection (35) with one on the rotatable antenna base (23) arranged first output (36) of the low-noise block converter (19) connected.
  • the rotatable antenna base (23) is rotatable with a fixed one Antenna base (37) connected. Power transmission between the fixed antenna base (37) and the rotatable Antenna base (23) takes place via a transformer opposite fixed primary windings (39) rotatable secondary windings (40). Such power transmission is fundamental possible with all rotatable antennas.
  • the construction of the transformer corresponds in principle to one Electric motor with the carbon brushes removed.
  • the Primary windings (39) correspond to the field winding of the electric motor.
  • the secondary windings (40) of the transformer (38) correspond the rotating windings of the electric motor that lead to a common power supply merged via bridge rectifier become.
  • a commutator-like part (41) corresponds the commutator of the electric motor, at its commutator connections the secondary windings (40) are available.
  • the transformer (38) has, for example, 18 secondary windings (40), three of which are shown schematically in FIGS. 6 to 8 are shown. Of the secondary windings (40) only the one in operation whose winding is approximately is perpendicular to the primary winding (39) or field winding. For this winding is the maximum magnetic field. The others Secondary windings (40) deliver less or no voltage. There are bridge rectifiers on all secondary windings (40) (42) connected through which the secondary windings (40) merged into a common power supply become.
  • the secondary windings (40) are at the lower end on the rubber-like Part (41) connected. The two ends of each Windings are connected to each other.
  • the reflector antenna (2) it is also possible to use the reflector antenna (2) to be supplied with power via slip rings, not shown.
  • the reflector antenna (2) is not shown Personal computer or a display connected to the signal measurement data and received TV pictures can be displayed at the same time are.
  • the sub-reflector (5) rotates and generates 90 ° each offsets four trigger signals for measuring the radiation intensity of the main beam (12).
  • the signal strength is from a sensor of the receiving element (7) measured, the measured values held or saved and compared in a comparator, not shown, a correction signal for tracking or alignment the reflector antenna (2) on the radiation source (3).
  • the signal is derived from the reflector antenna (2 ') two in separate directions from the reflector antenna (2 ') away coaxial cables (20, 25). Vertical and horizontal Signals of the low-noise block converter (19) are in the different separate coaxial cables (20, 25) forwarded.
  • the secondary windings (40) rotate accordingly with, while the primary windings (39) remain unchanged, so that the power transmission or voltage supply between the fixed antenna base (37) and the rotatable Antenna base (23) contactless by transforming the supply voltage via the transformer (38).

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)
EP98119823A 1997-11-19 1998-10-19 Système de poursuite et méthode pour aligner une pivotante antenne à réflecteur avec une source de rayonnement Withdrawn EP0918367A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19757992 1997-11-19
DE19757992A DE19757992A1 (de) 1997-10-14 1997-11-19 Nachführsystem und Verfahren zum Ausrichten einer verschwenkbaren Reflektorantenne

Publications (2)

Publication Number Publication Date
EP0918367A2 true EP0918367A2 (fr) 1999-05-26
EP0918367A3 EP0918367A3 (fr) 2004-01-21

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EP98119823A Withdrawn EP0918367A3 (fr) 1997-11-19 1998-10-19 Système de poursuite et méthode pour aligner une pivotante antenne à réflecteur avec une source de rayonnement

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EP (1) EP0918367A3 (fr)
CA (1) CA2252139A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1014483A1 (fr) * 1998-12-23 2000-06-28 Hughes Electronics Corporation Réflecteur rotatif à balayage avec source bougeante
EP1098393A2 (fr) * 1999-11-02 2001-05-09 RR ELEKTRONISCHE GERÄTE GmbH & Co. KG Antenne à réflecteur et procédé de fabrication d'un réflecteur secondaire
EP1119073A2 (fr) * 1999-11-02 2001-07-25 RR ELEKTRONISCHE GERÄTE GmbH & Co. KG Antenne à réflecteur avec un stator et un rotor qui est monté rotatif par rapport à ce stator
WO2009082992A1 (fr) * 2007-12-28 2009-07-09 Enerday Gmbh Indicateur de direction
WO2015120880A1 (fr) * 2014-02-11 2015-08-20 Vega Grieshaber Kg Détection de l'état de remplissage et de la topologie

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0314930A2 (fr) * 1987-11-02 1989-05-10 BRIONVEGA S.p.A. Méthode et dispositif de transmission de signaux de contrôle aux organes de manoeuvre dans les récepteurs de télévision pour satellite
EP0507440A1 (fr) * 1991-02-25 1992-10-07 Gerald Alexander Bayne Antenne
EP0514886A1 (fr) * 1991-05-23 1992-11-25 Hughes Aircraft Company Système d'antenne double réflecteur à balayage
US5194874A (en) * 1990-03-28 1993-03-16 Selenia Spazio S.P.A. Satellite antenna tracking system
US5386226A (en) * 1992-08-19 1995-01-31 U.S. Philips Corporation Connection unit for a television signal distribution system
US5457464A (en) * 1991-01-14 1995-10-10 Scott; David Tracking system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0314930A2 (fr) * 1987-11-02 1989-05-10 BRIONVEGA S.p.A. Méthode et dispositif de transmission de signaux de contrôle aux organes de manoeuvre dans les récepteurs de télévision pour satellite
US5194874A (en) * 1990-03-28 1993-03-16 Selenia Spazio S.P.A. Satellite antenna tracking system
US5457464A (en) * 1991-01-14 1995-10-10 Scott; David Tracking system
EP0507440A1 (fr) * 1991-02-25 1992-10-07 Gerald Alexander Bayne Antenne
EP0514886A1 (fr) * 1991-05-23 1992-11-25 Hughes Aircraft Company Système d'antenne double réflecteur à balayage
US5386226A (en) * 1992-08-19 1995-01-31 U.S. Philips Corporation Connection unit for a television signal distribution system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1014483A1 (fr) * 1998-12-23 2000-06-28 Hughes Electronics Corporation Réflecteur rotatif à balayage avec source bougeante
US6266024B1 (en) 1998-12-23 2001-07-24 Hughes Electronics Corporation Rotatable and scannable reconfigurable shaped reflector with a movable feed system
EP1098393A2 (fr) * 1999-11-02 2001-05-09 RR ELEKTRONISCHE GERÄTE GmbH & Co. KG Antenne à réflecteur et procédé de fabrication d'un réflecteur secondaire
EP1119073A2 (fr) * 1999-11-02 2001-07-25 RR ELEKTRONISCHE GERÄTE GmbH & Co. KG Antenne à réflecteur avec un stator et un rotor qui est monté rotatif par rapport à ce stator
EP1119073A3 (fr) * 1999-11-02 2002-02-13 RR ELEKTRONISCHE GERÄTE GmbH & Co. KG Antenne à réflecteur avec un stator et un rotor qui est monté rotatif par rapport à ce stator
EP1098393A3 (fr) * 1999-11-02 2002-06-05 RR ELEKTRONISCHE GERÄTE GmbH & Co. KG Antenne à réflecteur et procédé de fabrication d'un réflecteur secondaire
WO2009082992A1 (fr) * 2007-12-28 2009-07-09 Enerday Gmbh Indicateur de direction
WO2015120880A1 (fr) * 2014-02-11 2015-08-20 Vega Grieshaber Kg Détection de l'état de remplissage et de la topologie
US10050726B2 (en) 2014-02-11 2018-08-14 Vega Grieshaber Kg Fill level and topology determination

Also Published As

Publication number Publication date
CA2252139A1 (fr) 1999-05-19
EP0918367A3 (fr) 2004-01-21

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