US3496568A - Linear slot antenna with v-shaped lens at aperture - Google Patents

Linear slot antenna with v-shaped lens at aperture Download PDF

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Publication number
US3496568A
US3496568A US620886A US3496568DA US3496568A US 3496568 A US3496568 A US 3496568A US 620886 A US620886 A US 620886A US 3496568D A US3496568D A US 3496568DA US 3496568 A US3496568 A US 3496568A
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US
United States
Prior art keywords
aperture
antenna
shaped
slot antenna
linear slot
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
US620886A
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English (en)
Inventor
Benito Palumbo
Corrado Zaccagnini
Antonio Teofilato
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.)
Leonardo SpA
Original Assignee
Selenia Industrie Elettroniche Associate SpA
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 Selenia Industrie Elettroniche Associate SpA filed Critical Selenia Industrie Elettroniche Associate SpA
Application granted granted Critical
Publication of US3496568A publication Critical patent/US3496568A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/24—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave constituted by a dielectric or ferromagnetic rod or pipe
    • 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
    • H01Q19/06—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 refracting or diffracting devices, e.g. lens

Definitions

  • a radar antenna with a linear source consisting of a slotted wave guide in front of which is located an array of metal fins for froming the desired polarization, and with a directivity forming element, including a dielectric element consisting of an approximately U-shaped structure with slightly spread apart legs, inside of which,
  • the present invention relates to a linear antenna which obtains its directivity in the plane perpendicular to the line by means of a cylindrical dielectric structure.
  • Said antenna is characterized in that said cylindrical dielectric structure is fed from an array of slots cut on one of the sides of a wave guide, in order to obtain the directive radiation in a plane containing the array: the dielectric structure is embodied with two parallel layers of insulating material consisting for instance of a resin and glass fiber conglomerate, and ending at their front end with a semicylindrical fitting.
  • the radar antenna consists of a radiating linear source mounted within a U section, and of a dielectric structure for forming the beam in the vertical plane, which, includes, inside, a second V-shaped section member, made of dielectric material, the apex of which is turned towards the radiating linear source.
  • This dielectric structure is made of glass fiber fabric and polyester resin stabilized against the erosive action of the ultraviolet radiation.
  • the structure also is partially filled within a material electrically transparent to the microwaves, serving the purpose of 202ening the structure.
  • FIGURE 1 is a perspective view with some parts removed of the antenna
  • FIGURE 2 is a front elevational view of the antenna of FIGURE 1,
  • FIGURE 3 is a cross sectional view taken along the plane A--A of FIGURE 2.
  • the antenna includes a wave guide 3, with slots through its narrow side, forming an array of elementary radiators. Each slot radiates in a limited space defined by two metal plates 4.
  • the two metal plates 4 constitute a single U- shaped element in the closed part of which 4a the Wave guide 3 is fixed by means of an adhesive.
  • the metal fins 2 located in front of the radiating slots of the guide 3 are mounted in cuts 2a provided in the U-shaped member 4 to which said tins are fastened by means of an adhesive.
  • the dielectric structure 1 is embodied by a sheet element 1a made of liber glass and resin conglomerate having a uniform thickness and being U-shaped, with its legs slightly spread apart, within which is glued by an adhesive a V-shaped second element (1b of FIGURE l) of the same material.
  • the terminal parts of said V-shaped element are bent so as to follow the contour of the U-shaped element 1a to Awhich they are glued.
  • the elements 1b and 1d made of material electrically transparent to the microwaves serve the purpose of mechanicaly strengthening the structure.
  • the antenna can be fed through one ciad thereof as shown in FIGURE 2 or at its center.
  • the end or ends of the slotted guide are terminated either by a metal plate or by a microwave absorber, depending upon the used type of radiating array (stationary wave or traveling wave).
  • a radar antenna comprising a linear source with a wave guide, a linear array of radiating slots cut on one of the sides of said waveguide, a dielectric element associated with said wave guide to obtain the directivity in the plane perpendicular to said linear source consisting of a first linearly extending part having an approximately U-shaped cross section with slightly spread apart legs and a second linearly extending part having a V- shaped cross-section glued within said first linearly extending part.
  • An antenna as claimed in claim 1 wherein an array of metal fins is arranged in part of the radiating slots of said waveguide within cuts provided in a lmetal linearly extending element having an approximately U-shaped cross-section within which said waveguide is arranged, said array of metal fins forming together with the legs of the U-shaped metal section large waveguide blocks for suppressing an undesired polarization component.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
US620886A 1966-03-17 1967-03-06 Linear slot antenna with v-shaped lens at aperture Expired - Lifetime US3496568A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT597866 1966-03-17

Publications (1)

Publication Number Publication Date
US3496568A true US3496568A (en) 1970-02-17

Family

ID=11120822

Family Applications (1)

Application Number Title Priority Date Filing Date
US620886A Expired - Lifetime US3496568A (en) 1966-03-17 1967-03-06 Linear slot antenna with v-shaped lens at aperture

Country Status (3)

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US (1) US3496568A (fr)
FR (1) FR1514663A (fr)
GB (1) GB1123125A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334214A (en) * 1979-06-29 1982-06-08 Yagi Antenna Co., Ltd. Warning apparatus using microwaves
US4488157A (en) * 1982-02-22 1984-12-11 Tokyo Keiki Company Limited Slot array antenna assembly
US4829312A (en) * 1984-03-14 1989-05-09 Tokyo Keiki Co., Ltd. Slotted waveguide antenna assembly

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2548466B1 (fr) * 1983-07-01 1985-10-25 Radiotechnique Compelec Dispositif d'emission-reception pour radar de detection de presence, et procede pour le realiser
GB2157082B (en) * 1984-02-16 1987-07-29 Tokyo Keiki Kk Slotted waveguide antenna assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875439A (en) * 1956-01-26 1959-02-24 Sperry Rand Corp Center-fed annular scanning antenna
US3146449A (en) * 1961-12-29 1964-08-25 Bendix Corp Slot fed horn radiator with protective radome having polarization and resistance wires embedded therein
US3390393A (en) * 1964-09-17 1968-06-25 Bell Aerospace Corp Airfoil radar antenna

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875439A (en) * 1956-01-26 1959-02-24 Sperry Rand Corp Center-fed annular scanning antenna
US3146449A (en) * 1961-12-29 1964-08-25 Bendix Corp Slot fed horn radiator with protective radome having polarization and resistance wires embedded therein
US3390393A (en) * 1964-09-17 1968-06-25 Bell Aerospace Corp Airfoil radar antenna

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334214A (en) * 1979-06-29 1982-06-08 Yagi Antenna Co., Ltd. Warning apparatus using microwaves
US4488157A (en) * 1982-02-22 1984-12-11 Tokyo Keiki Company Limited Slot array antenna assembly
US4829312A (en) * 1984-03-14 1989-05-09 Tokyo Keiki Co., Ltd. Slotted waveguide antenna assembly

Also Published As

Publication number Publication date
GB1123125A (en) 1968-08-14
FR1514663A (fr) 1968-02-23

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