EP0397070B1 - Antenne mit parabolischem Reflektor - Google Patents

Antenne mit parabolischem Reflektor Download PDF

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Publication number
EP0397070B1
EP0397070B1 EP90108522A EP90108522A EP0397070B1 EP 0397070 B1 EP0397070 B1 EP 0397070B1 EP 90108522 A EP90108522 A EP 90108522A EP 90108522 A EP90108522 A EP 90108522A EP 0397070 B1 EP0397070 B1 EP 0397070B1
Authority
EP
European Patent Office
Prior art keywords
holding plate
reflector
groove
antenna
ring
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.)
Expired - Lifetime
Application number
EP90108522A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0397070A3 (de
EP0397070A2 (de
Inventor
Bernd Dipl.-Ing. Anger
Klaus-Dieter Noack
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.)
Kabelmetal Electro GmbH
Original Assignee
Kabelmetal Electro GmbH
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 Kabelmetal Electro GmbH filed Critical Kabelmetal Electro GmbH
Publication of EP0397070A2 publication Critical patent/EP0397070A2/de
Publication of EP0397070A3 publication Critical patent/EP0397070A3/de
Application granted granted Critical
Publication of EP0397070B1 publication Critical patent/EP0397070B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01Q19/12—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

Definitions

  • the invention relates to an antenna with a parabolic reflector and at least one feed line, at the free end of which an exciter is attached, in which in a central opening of the reflector a feed plate, which surrounds the opening as a rigid, tubular metal component and closes the opening, is attached is (U.S. Patent 3,864,688).
  • Antennas with a parabolic reflector are used, for example, for directional radio, satellite radio or radio location. They can be used to illuminate the reflector directly or to illuminate it using a subreflector (Cassegrain principle). "Illumination” is intended to encompass both directions of transmission of the electromagnetic waves, that is to say both waves to be emitted and waves to be received.
  • Exciters are used for illumination, which are arranged at the free end of at least one feed line. “Exciters” can be, for example, dipole exciters or also polarization switches in which two or more electromagnetic waves can be guided. “Exciter” can also be the appropriately shaped free end of a feed line.
  • the feed line can be a coaxial line or a waveguide.
  • the invention is based on the object of specifying an antenna with a parabolic reflector and a feed line with exciter fastened in a holding plate, which enables the holding plate to be easily rotated without tilting.
  • the pins protrude into the groove of the holding plate, so that the latter is fixed in the axial direction.
  • This position is so stable by the pins that the feed line, which projects essentially from one side of the holding plate with the exciter connected, cannot tilt or tilt the holding plate.
  • the retaining plate is therefore easily rotatable in the circumferential direction after loosening any additional fasteners that may be present. The exciter can then be turned into the position required for optimal transmission of the electromagnetic waves without great effort.
  • Fig. 1 an antenna with a parabolic reflector 1 and a feed line 2 attached to the same is shown schematically.
  • the feed line 2 projects centrally through the reflector 1. It is bent so that one the free end of the exciter 3 with its opening is approximately in the focus of the reflector 1.
  • clamping elements 4 can be used, which are attached to the reflector 1.
  • the feed line 2 can be a waveguide or a coaxial cable. It is equipped at its connection end with a high-frequency flange 5 for connecting further lines.
  • a holding plate 7 is arranged in the opening 6, in which the feed line 2 is fixed, for example by brazing.
  • the holding plate 7 is preferably made of metal, such as aluminum or stainless steel.
  • a metal ring 8 is attached to the reflector 1, which surrounds the holding plate 7 all around.
  • pins 9 are attached, which extend in the radial direction and engage in at least one groove 10 of the holding plate 7 when the latter is mounted on the reflector 1.
  • pins 9 offset from one another by 120 °.
  • the holding plate 7 can be rotated in the opening 6 of the reflector 1 in the circumferential direction if any fastening elements and the clamping elements 4 are loosened.
  • the pins 9 protruding into the groove 10 prevent the holding plate 7 from tilting or tilting.
  • the groove 10 can be circumferential, so that the holding plate 7 could be rotated 360 ° in the reflector 1. If such complete rotation is not required, the groove 10 can, according to the 5 can also be divided into three separate sections which are offset by 120 ° from one another. These sections each lie in the area of a pin 9, so that, for example, the holding plate 7 can be rotated through an angle of 120 °. With a larger number of pins 9, the groove 10 could also be divided into more than three sections.
  • two grooves 10 and 11 can also be provided next to one another in the holding plate 7, as shown in FIG. 6. Even then, the grooves 10 and 11 can be divided into sections.
  • the pins 9 are to be arranged in the ring 8 in two planes.
  • the pins 9 are adjustable in the radial direction. For this purpose, they can be provided with a thread in their area lying in the ring 8. If the material of the holding plate 7 is sufficiently stable, the pins 9 can in principle also be used to fix the holding plate 7 if they are pressed sufficiently firmly against the bottom of the groove 10. For the rotation of the holding plate 7, the pins 9 would then have to be turned outward until they lift off the bottom of the groove 10.

Landscapes

  • Aerials With Secondary Devices (AREA)
EP90108522A 1989-05-11 1990-05-07 Antenne mit parabolischem Reflektor Expired - Lifetime EP0397070B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8905888U 1989-05-11
DE8905888U DE8905888U1 (de) 1989-05-11 1989-05-11 Antenne mit parabolischem Reflektor

Publications (3)

Publication Number Publication Date
EP0397070A2 EP0397070A2 (de) 1990-11-14
EP0397070A3 EP0397070A3 (de) 1991-08-07
EP0397070B1 true EP0397070B1 (de) 1994-07-13

Family

ID=6839127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90108522A Expired - Lifetime EP0397070B1 (de) 1989-05-11 1990-05-07 Antenne mit parabolischem Reflektor

Country Status (4)

Country Link
EP (1) EP0397070B1 (no)
DE (2) DE8905888U1 (no)
FI (1) FI902341A0 (no)
NO (1) NO175730C (no)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672435B1 (fr) * 1991-02-05 1993-11-19 Cgti Dispositif de montage et de demontage de la source d'une antenne.
DE9419493U1 (de) * 1994-12-06 1995-01-26 Kabelmetal Electro Gmbh, 30179 Hannover Antenne mit parabolischem Reflektor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB897215A (en) * 1957-09-20 1962-05-23 Emi Ltd Improvements in or relating to radar apparatus
US3483564A (en) * 1966-10-17 1969-12-09 Diamond Antenna & Microwave Co Dish reflector with detachable waveguide feed
JPS6090404A (ja) * 1983-10-24 1985-05-21 Maspro Denkoh Corp パラボラアンテナ

Also Published As

Publication number Publication date
EP0397070A3 (de) 1991-08-07
DE8905888U1 (de) 1989-06-29
EP0397070A2 (de) 1990-11-14
NO902083L (no) 1990-11-12
DE59006398D1 (de) 1994-08-18
NO175730C (no) 1994-11-23
FI902341A0 (fi) 1990-05-10
NO175730B (no) 1994-08-15
NO902083D0 (no) 1990-05-10

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