EP0159301A1 - Antenne à balayage électronique aux lobes secondaires réduits - Google Patents

Antenne à balayage électronique aux lobes secondaires réduits Download PDF

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Publication number
EP0159301A1
EP0159301A1 EP19850850105 EP85850105A EP0159301A1 EP 0159301 A1 EP0159301 A1 EP 0159301A1 EP 19850850105 EP19850850105 EP 19850850105 EP 85850105 A EP85850105 A EP 85850105A EP 0159301 A1 EP0159301 A1 EP 0159301A1
Authority
EP
European Patent Office
Prior art keywords
aerial
wave
slits
conductors
aerial array
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.)
Granted
Application number
EP19850850105
Other languages
German (de)
English (en)
Other versions
EP0159301B1 (fr
Inventor
Erik Staffan Sjödin
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of EP0159301A1 publication Critical patent/EP0159301A1/fr
Application granted granted Critical
Publication of EP0159301B1 publication Critical patent/EP0159301B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • H01Q21/22—Antenna units of the array energised non-uniformly in amplitude or phase, e.g. tapered array or binomial array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0037—Particular feeding systems linear waveguide fed arrays
    • H01Q21/0043—Slotted waveguides
    • H01Q21/005—Slotted waveguides arrays

Definitions

  • the present invention relates to an electrically controlled aerial array, i.e. an aerial with a main lobe which may be controlled by varying the phases in the included aerial elements.
  • an aerial is used in radar reconnaissance equipment for example.
  • An aerial array of the kind intended here comprises a plurality of aerial elements configured as rectangular wave conductors lying parallel.
  • the radiation openings in the elements are formed as so-called broad side slits, i.e. longitudinal slits along the wider surface of each wave conductor in the aerial array.
  • the aerial lobes controllable in a plane at right angles to the longitudinal direction of the wave conductors by placing phase shifters in the feed path to each conductor, e.g. according to GB-B1.577.939. alternatingly above and below the centre line of the wave conductors, the illumination function will be phase modulated along the aerial aperture, i.e. along the wave conductors. This gives rise to large side lobe peaks in the aerial array radiation diagram.
  • edge slits may be used instead of broadside slits, see “Low-Sidelobe Radar Antennas” by H. E. Schrank from “Microwave Journal", July 1983 p 109 ff. Edge slits are difficult to master from the electrical design aspect, particularly due to the strong electromagnetic connection between them, and it is therefore desirable to retain broadside slits to obtain good side lobe suppression.
  • the object of the present invention is to achieve an electrically controlled aerial array of the kind mentioned in the introduction, using broadside slits as radiation elements, the aerial diagram for which shows substantially suppressed side lobes.
  • the invention is characterized as will be seen from the characterizing portion of claim 1.
  • the aerial array in Figure 1 comprises a plurality of aerial elements (4 elements in the Figure) in the form of rectangular wave conductors V1, V2, V3 and V4 lying parallel along their respective long narrow sides.
  • Feed wave conductors M1 and M2-M4 are each connected to one of the wave conductors V1-V4.
  • Each wave conductor is provided with radiation openings in the form of longitudinal slits, S 11 , S 12 , ... on the wave conductor VI, S 21 , S 22 on the wave conductor V2, S 31 , S 32 , ... on the wave conductor V3 and S 41, S 42 , ... on the wave conductor V4.
  • All the slits or slots shown are so-called broadside slits, i.e. uniformly wide slits or slots made in the wider face of the respective wave conductor.
  • the end portions of the feed wave conductors MI-M4 which are attached to the wave conductors VI-V4 have a feed opening (not illustrated in Figure 1) through which electromagnetic field energy, e.g. within the X band, is fed to each wave conductor VI-V4.
  • the other ends of the feed wave conductors are connected via suitable input feed elements to the phase shifters Fl-F4 (F3 and F4 being concealed in Figure 1) for controlling the phase of the field fed in, relative to a reference phase, e.g. the phase of the field to the wave conductor VI.
  • the grid lobes from the individual wave conductors V1-V4 would occur at different places in the radiation diagram and would not be added to each other to form the prominent peaks (S 1 S 2 ) in Figure 4.
  • different element spacing is achieved by changing the wavelengths of the individual wave conductors.
  • Figure 2 illustrates a portion of the aerial array in Figure 1, portions of two wave conductors being depicted.
  • the wave conductor wavelength ⁇ varied such that ⁇ g is different for each of the conductors VI-V4. This is described below in connection with Figure 3.
  • Different spacings d 1 , d 2 between the slits of the different wave conductors Vl-V4 are obtained as a consequence.
  • FIG 3 is a cross section of a wave conductor VI with the slits S 11 , S 12 , there also being shown a part of an adjacent wave conductor V2.
  • the wave conductor VI On its inner surface facing the slits S 11 , S 12 the wave conductor VI is provided with a raised portion or ridge R, situated symmetrically about the symmetrical axis C of the wave conductor.
  • the ridge has two side walls RV1 and RV2 extending at right angles to the inner surface Y of the wave conductor in the longitudinal direction and entire length thereof.
  • the side walls RV1 and RV2 are bridged by a wall RV3 at right angles to them. Both walls RV1 and RV2 have a height h from the surface Y.
  • the wave conductor Vl is a so-called ridge wave conductor wavelength ⁇ g for a given wave conductor width a and height b may be varied within given limits by varying ridge height h.
  • the height h is thus constant for a given wave conductor in the group aerial, i.e. for the wave conductor VI the height of the ridge R is equal to h 1 , for the wave conductor V2 the height of the R2 is h 2 (h 1 ⁇ h 2 ) and so on. Since the slit spacing d ⁇ g/2, the grid lobes may be spread out over the lobe angle interval of the aerial, thereby reducing their effect on the side lobe level.
  • Figure 5 a radiation diagram for an aerial array with a ridge wave conductor where this principle is utilised.
  • the diagram in Figure 5 may be compared directly with the one in Figure 4, since apart from the ridges Rl, R2 the aerials are otherwise entirely the same.
  • the inventive aerial array retains the above-mentioned advantages due to the broadside slits, but with reduced side lobes.
  • the invention is not restricted to embrace wave conductors VI-V4, where the wave conductor wavelengths ⁇ g 1 , ⁇ g 2 , ... for the different wave conductors have been varied by the measures described in connection with Figure 3.
  • What is essential in the inventive concept is that the wavelengths ⁇ g 1 , ⁇ g 2 ... have been made different, which results in that the mutual spacing d I , d 2 , ... must be dimensioned so that d 1 ⁇ d 2 etc.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
EP19850850105 1984-04-17 1985-03-26 Antenne à balayage électronique aux lobes secondaires réduits Expired EP0159301B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8402140 1984-04-17
SE8402140A SE442074B (sv) 1984-04-17 1984-04-17 Elektriskt styrd gruppantenn med reducerade sidolober

Publications (2)

Publication Number Publication Date
EP0159301A1 true EP0159301A1 (fr) 1985-10-23
EP0159301B1 EP0159301B1 (fr) 1989-06-07

Family

ID=20355609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850850105 Expired EP0159301B1 (fr) 1984-04-17 1985-03-26 Antenne à balayage électronique aux lobes secondaires réduits

Country Status (3)

Country Link
EP (1) EP0159301B1 (fr)
DE (1) DE3570953D1 (fr)
SE (1) SE442074B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4788552A (en) * 1985-10-31 1988-11-29 Telefonaktiebolaget L M Ericsson Wave guide element for an electrically controlled radar antenna
US4821044A (en) * 1987-04-14 1989-04-11 Hughes Aircraft Company Waveguide slot array termination and antenna system
US4899163A (en) * 1987-09-09 1990-02-06 Le Centre Regional D'Innovation et de Transfert de Technologie de Bretagne Loi Le Centre National de la Recherche Scientifique, Etablissement Public National a Caractere Scientifique et Technologiqu Microwave plate antenna in particular for Doppler radar
DE3915048A1 (de) * 1989-05-08 1990-11-15 Siemens Ag Elektronisch phasengesteuerte antennenanordnung
EP0501224A1 (fr) * 1991-02-23 1992-09-02 Alcatel SEL Aktiengesellschaft Antenne guide d'ondes à fente
DE4201933A1 (de) * 1992-01-24 1993-07-29 Siemens Ag Strahlergruppenantenne
US7696945B2 (en) * 2003-11-27 2010-04-13 Telefonaktiebolaget Lm Ericsson (Publ) Scannable sparse antenna array
WO2016057539A1 (fr) 2014-10-06 2016-04-14 Kymeta Corporation Dispositif, système et procédé pour atténuer des lobes latéraux d'un réseau d'antennes
CN109716589A (zh) * 2017-02-10 2019-05-03 华为技术有限公司 一种天线阵列及通信设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3193830A (en) * 1963-07-25 1965-07-06 Joseph H Provencher Multifrequency dual ridge waveguide slot antenna
US3524189A (en) * 1966-11-09 1970-08-11 Us Army Slotted waveguide antenna array providing dual frequency operation
US4423421A (en) * 1979-11-26 1983-12-27 Raytheon Company Slot array antenna with amplitude taper across a small circular aperture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3193830A (en) * 1963-07-25 1965-07-06 Joseph H Provencher Multifrequency dual ridge waveguide slot antenna
US3524189A (en) * 1966-11-09 1970-08-11 Us Army Slotted waveguide antenna array providing dual frequency operation
US4423421A (en) * 1979-11-26 1983-12-27 Raytheon Company Slot array antenna with amplitude taper across a small circular aperture

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4788552A (en) * 1985-10-31 1988-11-29 Telefonaktiebolaget L M Ericsson Wave guide element for an electrically controlled radar antenna
US4821044A (en) * 1987-04-14 1989-04-11 Hughes Aircraft Company Waveguide slot array termination and antenna system
US4899163A (en) * 1987-09-09 1990-02-06 Le Centre Regional D'Innovation et de Transfert de Technologie de Bretagne Loi Le Centre National de la Recherche Scientifique, Etablissement Public National a Caractere Scientifique et Technologiqu Microwave plate antenna in particular for Doppler radar
DE3915048A1 (de) * 1989-05-08 1990-11-15 Siemens Ag Elektronisch phasengesteuerte antennenanordnung
EP0501224A1 (fr) * 1991-02-23 1992-09-02 Alcatel SEL Aktiengesellschaft Antenne guide d'ondes à fente
DE4201933A1 (de) * 1992-01-24 1993-07-29 Siemens Ag Strahlergruppenantenne
US7696945B2 (en) * 2003-11-27 2010-04-13 Telefonaktiebolaget Lm Ericsson (Publ) Scannable sparse antenna array
WO2016057539A1 (fr) 2014-10-06 2016-04-14 Kymeta Corporation Dispositif, système et procédé pour atténuer des lobes latéraux d'un réseau d'antennes
EP3204987A4 (fr) * 2014-10-06 2018-05-23 Kymeta Corporation Dispositif, système et procédé pour atténuer des lobes latéraux d'un réseau d'antennes
US10263331B2 (en) 2014-10-06 2019-04-16 Kymeta Corporation Device, system and method to mitigate side lobes with an antenna array
US11450955B2 (en) 2014-10-06 2022-09-20 Kymeta Corporation Device, system and method to mitigate side lobes with an antenna array
CN109716589A (zh) * 2017-02-10 2019-05-03 华为技术有限公司 一种天线阵列及通信设备
EP3567677A4 (fr) * 2017-02-10 2020-02-05 Huawei Technologies Co., Ltd. Réseau d'antennes et dispositif de communication
US10903582B2 (en) 2017-02-10 2021-01-26 Huawei Technologies Co., Ltd. Antenna array and communications device

Also Published As

Publication number Publication date
DE3570953D1 (en) 1989-07-13
SE8402140L (sv) 1985-10-18
SE8402140D0 (sv) 1984-04-17
SE442074B (sv) 1985-11-25
EP0159301B1 (fr) 1989-06-07

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