EP0022991B1 - Dispositif d'antenne pour le masquage des lobes secondaires d'une antenne principale hautement directive et application à une antenne de radar panoramique - Google Patents

Dispositif d'antenne pour le masquage des lobes secondaires d'une antenne principale hautement directive et application à une antenne de radar panoramique Download PDF

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Publication number
EP0022991B1
EP0022991B1 EP80103989A EP80103989A EP0022991B1 EP 0022991 B1 EP0022991 B1 EP 0022991B1 EP 80103989 A EP80103989 A EP 80103989A EP 80103989 A EP80103989 A EP 80103989A EP 0022991 B1 EP0022991 B1 EP 0022991B1
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EP
European Patent Office
Prior art keywords
antenna
antenna arrangement
reflector
dipole
main
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Expired
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EP80103989A
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German (de)
English (en)
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EP0022991A1 (fr
Inventor
Erwin Dipl.-Ing. Kress
Nikolaus Ing.Grad. Willburger
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Siemens AG
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Siemens AG
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    • 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

Definitions

  • the invention relates to an antenna arrangement for covering the radiation level of all the auxiliary lobes of a sharply focusing main antenna, consisting of a dipole primary radiator or the like and a reflector arranged behind it, the reflection contour of which is linear throughout in a first plane and in a second one which is orthogonal to it Level consists of discontinuous polygonal successive linear sections, which are dimensioned symmetrically in this plane on both sides of the main beam axis of the dipole and are arranged at obtuse angles to the main beam direction.
  • SLC side lobe cancellation
  • monopole radiators i.e. cylindrical antennas with a height of a quarter wavelength
  • passive elements can influence the radiation characteristics of the monopole radiators (DE-OS 2540763).
  • circular cylindrical slot antennas can also be used with vertical polarization, the slot (possibly multi-storey) rotating radially.
  • An omnidirectional diagram recorded with horizontal polarization is obtained with a circular cylindrical slot antenna in which one or more slots run axially.
  • Circular cylindrical slot antennas are known from the book by Silver “Microwave Antenna Theory and Design”, McGraw-Hill Book Company, 1949, pages 305 and 306.
  • an SLS antenna arrangement which consists of a dipole primary radiator and a reflector, the reflection contour of which is linear throughout in a first plane and in a second, orthogonal plane consisting of three discontinuously polygonal successive linear sections consists.
  • the reflector is dimensioned symmetrically on both sides of the main beam axis. The reflector turns its convex side towards the dipole, since the two outer sections of the reflector protrude obliquely to the rear.
  • the object of the invention is to have available for the SLS and for the SLC technology an antenna arrangement, which also the first side lobe of a sharply focusing main antenna, for. B. a Rundsuchradarantenne, and the irradiation-side lobe when executing this main antenna as a reflector antenna well and safely covered with a largely constant, relatively high level distance, so that z. B. in SLC technology the described control can be carried out without errors, but in SLS technology a clear level comparison is also possible in all angular ranges.
  • this object is achieved in that, starting from the main beam axis mentioned, the sections to one side in order approximately the following reference angles to the main beam direction and approximately the following lengths in relation to the Operating wavelength X have: the central, continuously linear reflection contour, which also forms a reflector symmetry axis, is perpendicular to the main beam axis of the dipole.
  • the antenna arrangement according to the invention has the advantage that it is independent of polarization.
  • the antenna arrangement can be operated, for example, with a dipole primary radiator, which is designed for the radiation of horizontal polarization, but also just as well with a dipole, which is designed for vertical polarization.
  • a preferred application of the antenna arrangement according to the invention is in the suppression of sublobe signals from search radar antennas.
  • the antenna arrangement according to the invention is expediently structurally arranged as an additional antenna on the radar search antenna, which forms the sharply focusing main antenna.
  • the first level already mentioned runs vertically and the second level horizontally.
  • the radiation pattern of the additional antenna in the vertical plane (H plane) is determined by the vertical extent of the reflection contour of the reflector.
  • the radiation diagram in the vertical plane can also be influenced by a horizontally extending base plate mounted under the reflector.
  • the antenna arrangement shown in the perspective view according to FIG. 1 consists of a dipole 1 using triplate technology, which is arranged in front of a specially shaped reflector 2.
  • the triplate dipole used in the illustrated embodiment is known from DE-PS 2020192 and is therefore no longer described individually below.
  • the triplate dipole 1 is positioned so that a horizontally polarized radiation diagram results.
  • coaxially fed dipoles can also be used, for example. Any polarization can be set according to the orientation of your legs.
  • the main beam axis of dipole 1 is designated 3.
  • the dipole 1 is designed as a structural unit and inserted into an opening 4 of the reflector 2. It is powered from the rear of the reflector 2.
  • the metallic reflector 2 has a reflection contour which is linear throughout in each vertical plane and consists in each horizontal plane of discontinuously polygonally successive, respectively linear sections 5 to 11 and 5 'to 11'.
  • the central, vertically continuous reflection contour 12 which also forms an edge between the two sections 5 and 5 'and a reflector axis of symmetry, is perpendicular to the main beam axis 3 of the dipole 1.
  • the sections on both sides of the main beam axis 3 of the dipole are thus dimensioned and arranged symmetrically in the horizontal cross section.
  • the width dimensions of the sections 5 to 11 and 5 'to 11' are entered in Fig. 1 below. They are X / 8 for sections 5 to 9 and 5 'to 9', ⁇ / 6 for sections 10 and 10 'and 5/8 - X for sections 11 and 11'.
  • the height dimension of the reflector 2 is 10/8 - X.
  • FIG. 2 represents a horizontal section through one half of the reflector 2.
  • the reference angles to the main beam axis 3 of the dipole 1 are 116 ° for sections 5 and 5, 173 ° for sections 6 and 6, 173 ° for sections 7 and 7, 110 ° for sections 8 and 8, 9 and for sections 8 and 8 9 '97 °, at sections 10 and 10' 92 °, and at sections 11 and 11 '142 °.
  • the special shape of the reflector 1 ensures that the radiation emanating from it prevents the energy swirl of the power radiated directly from the dipole 1 and fills up minima in the radiation diagram.
  • FIG. 3 shows a common representation of the schematic horizontal diagram 13 of a radar search antenna and the schematic horizontal diagram 14 of an antenna arrangement according to the invention associated with the radar antenna according to FIG. 1.
  • the azimuth angles are in each case from - 180 ° to + 180 ° and the ordinate is the ordinate Level values of approximately - 40 dB to 0 dB are plotted.
  • the azimuthal radiation diagram according to FIG. 3 shows a practically constant level in a wide angular range that adjoins the main lobe 15 of the radar antenna, so that the relatively high first secondary lobes of the main antenna and, in the case of reflector antennas, the spill-over secondary lobes 16 and 16 respectively 'are covered in each case. This radiation behavior, coupled with a low standing wave ratio, can be observed in a wide frequency range with the inventive antenna arrangement shown in FIG. 1.
  • the radiation diagram in the vertical plane is primarily defined by the vertical extent of the reflector 2.
  • the horizontal diagram shown in FIG. 3 applies approximately within a vertical angular range of 30 °.
  • the antenna arrangement according to the invention for suppressing side lobes of search radar antennas is approximately cosec 2 -shaped vertical diagram is particularly suitable.
  • the radiation diagram in the vertical plane is also influenced by a horizontally extending metal base plate 17 mounted under the reflector 2.

Landscapes

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

Claims (6)

1. Dispositif d'antenne pour le masquage, du point de vue des niveaux de rayonnement, de tous les lobes secondaires d'une antenne principale hautement directive, constitué par un élément primaire d'antenne (1) de la forme d'un dipôle ou similaire, et un réflecteur (2) disposé à l'arrière de ce dernier, et dont le contour de réflexion est réalisé de façon linéaire et d'un seul tenant dans un premier plan et est constitué, dans un second plan orthogonal au plan précédent, par des sections linéaires successives et instables formant un polygone (5 à 11, 5' à 11'), sections qui, dans ce plan, sont dimensionnées de façon symétrique de part et d'autre de l'axe principal de rayonnement (3) du dipôle et disposées avec un angle obtus par rapport à l'axe principal de rayonnement, caractérisé par le fait qu'à partir de cet axe principal de rayonnement (3) les sections présentent successivement et vers un côté sensiblement les angles de référence suivants et à peu près les longueurs suivantes par rapport à la longueur d'onde de fonctionnement X :
Figure imgb0005
le contour de réflexion linéaire et d'un seul tenant (12) formant en même temps l'axe de symétrie du réflecteur et étant perpendiculaire à l'axe principal de rayonnement (3) du dipôle.
2. Dispositif d'antenne selon la revendication 1, caractérisé par le fait que la longueur du contour de réflexion linéaire et d'un seul tenant est à peu près de 10/8 - X.
3. Dispositif d'antenne selon la revendication 1 ou 2, caractérisé par le fait que le réflecteur (2) comporte une ouverture (4) dans laquelle est enfichable l'élément primaire d'antenne en forme de dipôle et réalisé comme un élément enfichable.
4. Dispositif d'antenne selon l'une des revendications précédentes, caractérisé par le fait que le premier plan est vertical et le second est horizontal.
5. Dispositif d'antenne selon la revendication 4, caractérisé par le fait que sous le réflecteur (2) est disposée une plaque de base (17) s'étendant horizontalement.
6. Mise en oeuvre d'un dispositif d'antenne selon la revendication 4 ou 5, en liaison avec une antenne de radar panoramique de surveillance, tournante, qui constitue l'antenne principale à caractère fortement directif, de manière que le dispositif d'antenne (1, 2) soit relié structurellement avec l'antenne de radar panoramique de surveillance et est disposé sur celle-ci.
EP80103989A 1979-07-13 1980-07-10 Dispositif d'antenne pour le masquage des lobes secondaires d'une antenne principale hautement directive et application à une antenne de radar panoramique Expired EP0022991B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2928370 1979-07-13
DE19792928370 DE2928370C2 (de) 1979-07-13 1979-07-13 Antennenanordnung zur strahlungspegelmäßigen Überdeckung aller Nebenzipfel einer scharf bündelnden Hauptantenne

Publications (2)

Publication Number Publication Date
EP0022991A1 EP0022991A1 (fr) 1981-01-28
EP0022991B1 true EP0022991B1 (fr) 1983-06-22

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EP80103989A Expired EP0022991B1 (fr) 1979-07-13 1980-07-10 Dispositif d'antenne pour le masquage des lobes secondaires d'une antenne principale hautement directive et application à une antenne de radar panoramique

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EP (1) EP0022991B1 (fr)
DE (1) DE2928370C2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1178568A4 (fr) * 2000-03-10 2003-03-26 Nippon Antenna Kk Antenne a dipoles en croix et antenne composite
KR100441146B1 (ko) * 2001-11-16 2004-07-22 (주)하이게인안테나 이동통신 서비스용 중계기의 노치형 안테나
US7489282B2 (en) 2005-01-21 2009-02-10 Rotani, Inc. Method and apparatus for an antenna module
CN101395820A (zh) 2006-02-28 2009-03-25 罗塔尼公司 重叠mimo天线物理扇区的方法和设备

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1506890A (en) * 1974-09-13 1978-04-12 Thomson Csf Common antenna for primary and secondary radars having means for suppressing interrogation side-lobes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162497A (en) * 1963-09-18 1979-07-24 The United States Of America As Represented By The Secretary Of The Navy Side lobe suppression device for a directional receiving system
DE1241499B (de) * 1964-10-09 1967-06-01 Siemens Ag Richtantenne aus einem breitbandigen Dipol oder Unipol und zwei einen Reflektor bildenden Seitenwaenden
DE1948104A1 (de) * 1969-09-23 1971-03-25 Siemens Ag Verfahren zur Erzielung eines breitbandig gleichmaessigen Richtstrahldiagramms sowie Anordnung zur Durchfuehrung des Verfahrens
US3803622A (en) * 1973-05-03 1974-04-09 Us Navy Hf dual-feed corner reflector antenna
US3881177A (en) * 1974-03-12 1975-04-29 Us Army Frequency agile-baseband sidelobe canceller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1506890A (en) * 1974-09-13 1978-04-12 Thomson Csf Common antenna for primary and secondary radars having means for suppressing interrogation side-lobes

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DE2928370A1 (de) 1981-01-15
DE2928370C2 (de) 1982-04-15
EP0022991A1 (fr) 1981-01-28

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