EP0394795B1 - Antenne mit parabolischem Reflektor - Google Patents

Antenne mit parabolischem Reflektor Download PDF

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Publication number
EP0394795B1
EP0394795B1 EP90107157A EP90107157A EP0394795B1 EP 0394795 B1 EP0394795 B1 EP 0394795B1 EP 90107157 A EP90107157 A EP 90107157A EP 90107157 A EP90107157 A EP 90107157A EP 0394795 B1 EP0394795 B1 EP 0394795B1
Authority
EP
European Patent Office
Prior art keywords
reflector
feed line
antenna
feeder
flange
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
EP90107157A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0394795A1 (de
Inventor
Paul Dipl.-Ing. Thiele
Horst Anthony
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 EP0394795A1 publication Critical patent/EP0394795A1/de
Application granted granted Critical
Publication of EP0394795B1 publication Critical patent/EP0394795B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/04—Fixed joints
    • H01P1/042—Hollow waveguide joints
    • 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

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 metal feed flange enclosing the opening as a rigid, tubular metal component and closing the opening attached, which is soldered to the feed line by way of prefabrication (US Pat. No. 3,483,564).
  • 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 via 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 has for its object to develop the antenna described above so that no chemical corrosion can occur between the holding flange and feed line.
  • the feed line can be mounted in a particularly simple manner.
  • the metal retaining flange can be soldered to the feed line with great accuracy and very easily. Because of the prefabrication and the possibilities it offers, it can be ruled out that the feed line will be deformed when the holding flange is attached. Since the retaining flange is still soldered all round to the feed line, no corrosion can occur between these two parts, because even when using metals that are far apart in the voltage series for the feed line on the one hand and the holding flange on the other hand, no chemical reactions can occur due to the hermetic seal by the solder material .
  • the mounting flange mounted with great accuracy ensures that the subsequent installation in the opening of the reflector is also easy. With a screw connection of the holding flange and reflector, there is the additional advantage that the adjustment of the exciter at the free end of the feed line is simplified. Smaller deviations in size can be easily compensated for by washers.
  • Fig. 1 shows an antenna according to the invention in a schematic representation.
  • Fig. 2 shows a detail of the antenna in an enlarged view.
  • Fig. 3 shows a cross section through a feed line with an integrally formed retaining flange.
  • FIG. 4 shows an embodiment of the antenna modified from FIG. 2 in a detail.
  • Fig. 1 an antenna with a parabolic reflector 1 and a feed line 2 attached to the same is shown schematically.
  • the feed line protrudes centrally through the reflector 1. It is bent so that an exciter 3 located at its free end lies with its opening approximately in the focus of the reflector 1.
  • clamping elements 4 can be used, which are attached to the reflector 1. For example, four clamping elements, each offset by 90 °, can be used.
  • the feed line 2 can be a waveguide or a coaxial cable.
  • the feed line 2 To carry the feed line 2 through the reflector 1 and to fix it, it has a central opening 5. Through the opening 5, the feed line 2 protrudes with its connection end, to which a high-frequency flange for connecting further lines is attached.
  • the feed line 2 is connected to the reflector 1 via a holding flange 7 in such a way that it cannot move in the axial direction.
  • the gap between feed line 2 and reflector 1 in opening 5 can be filled with a sufficiently hard plastic for stabilization.
  • the feed line 2 is, for example, a waveguide with a rectangular cross section, as can be seen from FIG. 3.
  • the holding flange 7 is soldered all round to the feed line 2 in a prefabrication, so that there is an all-round fixed connection between the holding flange 7 and the feed line 2 results.
  • the two parts are preferably brazed.
  • the holding flange 7 can be provided in its outer region with holes 8, by means of which it can be screwed to the reflector 1.
  • the dimensions of the holding flange 7 can be kept small, so that it can be easily attached to the feed line 2 without the risk of deformation of the feed line 2. With a suitable device, a simple and dimensionally accurate attachment of the holding flange 7 is possible.
  • the all-round soldering of the feed line 2 and the holding flange 7 ensures that no chemical corrosion can occur between the two parts even if the metals used are far apart in the voltage series.
  • stainless steel is used for the holding flange 7, which also guarantees sufficient strength.
  • the feed line 2 is preferably made of brass or copper. Instead of a waveguide with a rectangular cross section, a waveguide with a different cross section could also be used.
  • the feed line 2 is preferably designed as a coaxial cable if the exciter 3 is a dipole exciter.
  • the holding flange 7 can be connected directly to the reflector 1 in accordance with FIG. 2. However, it is also possible to insert a holding plate 9 into the opening 5 of the reflector 1, which is then enlarged accordingly, to which the holding flange 7 is then attached.
  • An enlarged opening 5 in the reflector 1 may be required if the feed line 2 with the exciter 3 attached to it is to be mounted from the rear of the reflector 1 or to be dismantled for repair purposes.
  • the opening 5 must then be large enough so that the feed line 2 with the mounted exciter 3 can be passed without risk of damage can. This can be particularly problematic if, according to FIG. 4, two or more feed lines 2 are to be attached to the reflector 1, which lead together to a polarization switch serving as exciter 3.
  • Such arrangements are required when the antenna is to be supplied with or received two orthogonal waves.
  • the holding plate 9 is also advantageous if the feed line or feed lines 2 in the reflector 1 are to be rotatable in the circumferential direction. This may be desirable for easier adjustment of the pathogen to optimal transmission.
  • the holding plate 9 can be made of aluminum.
  • each feed line 2 can have its own holding flange 7.
  • the holding plate 9 can be equipped with a single opening 11 for the passage of the feed lines 2. However, according to FIG. 8, it can also have two openings 13 and 14 separated from one another by a web 12. If there are more than two feed lines 2, there may also be more separate openings. This configuration of the opening 5 with the openings generally also applies to the reflector 1 if no holding plate 9 is used.

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  • Aerials With Secondary Devices (AREA)
EP90107157A 1989-04-28 1990-04-14 Antenne mit parabolischem Reflektor Expired - Lifetime EP0394795B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3914101 1989-04-28
DE3914101A DE3914101A1 (de) 1989-04-28 1989-04-28 Antenne mit parabolischem reflektor

Publications (2)

Publication Number Publication Date
EP0394795A1 EP0394795A1 (de) 1990-10-31
EP0394795B1 true EP0394795B1 (de) 1993-06-16

Family

ID=6379707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107157A Expired - Lifetime EP0394795B1 (de) 1989-04-28 1990-04-14 Antenne mit parabolischem Reflektor

Country Status (4)

Country Link
EP (1) EP0394795B1 (fi)
DE (2) DE3914101A1 (fi)
FI (1) FI97924C (fi)
NO (1) NO176160C (fi)

Families Citing this family (3)

* 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.
DE102007061571A1 (de) * 2007-12-18 2009-07-16 Endress + Hauser Gmbh + Co. Kg Füllstandsmessgerät
EP3497742B1 (en) 2016-08-10 2020-07-08 Airbus Defence and Space Limited Waveguide assembly and manufacturing method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2448907A (en) * 1944-01-25 1948-09-07 Walworth Patents Inc Pipe joint
US2778016A (en) * 1953-01-23 1957-01-15 Gabriel Co Wave guide antenna
US3483564A (en) * 1966-10-17 1969-12-09 Diamond Antenna & Microwave Co Dish reflector with detachable waveguide feed
GB1291736A (en) * 1970-04-16 1972-10-04 Standard Telephones Cables Ltd Method of attaching flanges to waveguides
US3864688A (en) * 1972-03-24 1975-02-04 Andrew Corp Cross-polarized parabolic antenna

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 9, No. 240(E-345) (1963), 26. September 1985;& JP-A 60090404 (MASPRO DENKO K.K.) 21.05.1985 *

Also Published As

Publication number Publication date
FI97924B (fi) 1996-11-29
EP0394795A1 (de) 1990-10-31
FI902130A0 (fi) 1990-04-27
DE3914101A1 (de) 1990-10-31
NO901907L (no) 1990-10-29
NO901907D0 (no) 1990-04-27
FI97924C (fi) 1997-03-10
NO176160B (no) 1994-10-31
DE59001755D1 (de) 1993-07-22
NO176160C (no) 1995-02-08

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