US3254343A - Lattice tower supporting interior dipoles with reduced interference - Google Patents

Lattice tower supporting interior dipoles with reduced interference Download PDF

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Publication number
US3254343A
US3254343A US224935A US22493562A US3254343A US 3254343 A US3254343 A US 3254343A US 224935 A US224935 A US 224935A US 22493562 A US22493562 A US 22493562A US 3254343 A US3254343 A US 3254343A
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US
United States
Prior art keywords
mast
members
radiators
bracing
dipoles
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
US224935A
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English (en)
Inventor
Laub Helmut
Kristkoiz Karl-Heinz
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.)
Siemens and Halske AG
Siemens Corp
Original Assignee
Siemens Corp
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 Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US3254343A publication Critical patent/US3254343A/en
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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
    • H01Q21/205—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path providing an omnidirectional coverage
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1242—Rigid masts specially adapted for supporting an aerial
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/528—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the re-radiation of a support structure

Definitions

  • the present invention relates to an antenna system with an antenna support constructed in the form of a lattice mast or the like, in connection with which the radiators, for instance full-wave dipoles, are arranged substantially within the mast.
  • An antenna system in which the radiators which are fed as whole-wave dipoles are arranged in the form of a polygon which in its turn is arranged within the corner posts of a supporting lattice mast.
  • the individual radiators are in this case connected in the voltage node by special struts with the corner posts of the mast.
  • the horizontal members of the mast are in the known systems arranged approximately in the center between the radiator polygons. In such antenna systems, the influence of the mast on the radiation can be kept very small, as long as the length of the side of the square mast does not exceed certain limits referred to the wavelength of the energy radiated.
  • the wavelength of the energy radiated is reduced or in case of constant wavelength, the dimensions of the mast are increased, then changes are produced in the radiation pattern, as a result of electrical resonances, particularly on the horizontal members of the mast.
  • the object of the present invention is in particular to make possible, also for large mast cross-sections as compared with the wavelength, the use of radiators arranged on the inside of lattice masts without the radiation pattern being changed by the influence of the mast.
  • the same masts can thus be used for larger frequency ranges, for instance for an entire television band, and more stable constructions are obtained, such as is desirable in particular for antenna systems of high gain and correspondingly great structural heights.
  • Such antenna systems can therefore also serve as supports for other stacked antennas of other frequency ranges.
  • the present invention differing from these concepts, points out an entirely different manner by which a solution of the mechanical and electrical problems of such an antenna system is possible.
  • the radiators are arranged in the region of a horizontal diagonal brace serving for the reinforcing of the corner posts of the mast, and are held preferably directly or indirectly to the members of the horizontal diagonal bracing. It has surprisingly been found that with mast cross-sections which go beyond the size customary heretofore with similar antenna systems, disturbances in the radiation patterns, particularly in case of omnidirectional radiation, can be avoided. As compared with the known antennas with radiators arranged within the mast, there is also the additional advantage that the members of the horizontal diagonal bracing can simultaneously also be ice used as direct or indirect mounts for the antenna elements so that additional supports are no longer necessary.
  • radiators referred to the members of the horizontal diagonal bracing are obtained if the radiators extend transversely to the members immediately adjacent to them and on which they are preferably also mounted. It is furthermore advisable to develop the horizontal diagonal bracing as simple crossed bracing in connection with which the radiators are arranged at right angles to the members bearing them.
  • the latter can be conductively connected at the voltage node or near it to the members of the horizontal diagonal bracing.
  • FIG. 1 shows in perspective a lattice mast 1 of square cross-section, the corners of which are formed by the corner posts 2, 3, 4 and 5.
  • the radiator elements 6, 7, 8 and 9, which operate as whole-wave dipoles, are also arranged in a square within the mast in such a manner that the corners of the mast and the corners of the square formed by the radiator are staggered 45 from each other.
  • the corners of the square formed by the radiators lie accordingly in the center of the side planes of the mast 1.
  • a plurality of such radiator polygons are arranged one above the other, of which only the system formed of the radiators 14, 15, 16 and 17 is shown.
  • the horizontal diagonal 'bracings necessary for the mechanical stiffening of the mast consist of the members 22 extending from the corner post 2 to corner post 4, and the members 21 connecting corner posts 3 and 5.
  • the radiators 6, 7, 8 and 9, and 14, 15, 16 and 17 respectively are arranged in the region of the members 21 and 22 forming the horizontal diagonal bracing, which members when whole-wave dipoles are used can be conductively connected with the members 21 and 22 respectively directly in the voltage node of the voltage distribution of a standing wave designated in FIG. 2 by the reference letter U, or in its vicinity.
  • the mechanical mounting of said radiators can also be effected by the members 21 and 22, in which case the radiators should be supported on the members with the use of insulators.
  • the side bracing provided on the sides of the mast consists of simple uncrossed members 23, 24, 25 and 26 which are arranged in zig-zag form and the corners of which lie in each case in the region of the radiator polygon and thus in the region of the horizontal diagonal bracings. In this way, disturbing resonances at the members of the side bracing are substantially avoided.
  • the members of the side bracing on the individual sides of the mast are so associated with each other that in developed view zig-zag strips extending parallel to each other are formed.
  • the radiation patterns of such antenna systems lie, even in case of side lengths of the mast corresponding approximately to an average wavelength, within the sphere of the requirements established for omni-directional patterns.
  • FIG. 2 shows the lattice mast as seen from the top thereof.
  • the full-wave dipoles 14, 15, 16 and 17 are placed under voltage via the feed lines 27 and 28.
  • the balancing and transformer units 31, 32 are advantageously arranged between the radiator planes and can in given cases be fastened to a central ladder 30.
  • the wholewave dipoles extend transversely to the members 21, 22 of the horizontal diagonal bracing, which support them and form therewith an angle of 90. In this way, the whole-wave dipoles extend in each case parallel to the member of the horizontal diagonal bracing which does not support them and which lies symmetrically in the center between the whole-wave dipoles which extend in each case parallel toeach other. In this manner are avoided disturbing influences from the struts of the horizontal diagonal bracing on the radiation properties of the radiator polygon.
  • the feeding of these radiators is advantageously effected by causing a circular current to develop on the radiator polygon, whereby the radiators lying opposite each other are traversed by currents of the same magnitude but in opposite directions.
  • the horizontal diagonal bracing is developed as a simple cross-wise bracing.
  • the center point of the horizontal diagonal bracing formed by the members 21 and 22 and the center point of the radiator polygon both lie in the axis of the mast.
  • the device for the connecting in parallel of the four whole-wave dipoles of the cube, as well as for the unbalancing for connection to a feed cable is suitably fastened to a frame between the two dipole planes or to a ladder which is preferably arranged at the center.
  • Every two cubes lying above each other are advantageously mutually displaced by 90 in the vertical axis.
  • An antenna system comprising an antenna supporting mast of lattice-type construction having corner posts and horizontal diagonal brace members which serve to stiffen such corner posts, and whole wave dipole radiators arranged substantially within the mast, disposed adjacent the corners of the mast and supported on such diagonal brace members.
  • radiators extend transverse to those members of the horizontal diagonal bracing which they'immediately adjoin and on which they are mounted.
  • radiators are fed by pairs as whole-wave dipoles, said radiators being arranged in a polygon with corners staggered with respect to the corner posts of the mast.
  • radiators form a square which is staggered 45 with respect to the lattice mast which is likewise developed with a square cross-section.
  • each of the whole-wave dipoles is conductively connected in the vicinity of the voltage node thereof with the members of the horizontal diagonal bracing.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Support Of Aerials (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Road Signs Or Road Markings (AREA)
US224935A 1961-09-27 1962-09-20 Lattice tower supporting interior dipoles with reduced interference Expired - Lifetime US3254343A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0075963 1961-09-27

Publications (1)

Publication Number Publication Date
US3254343A true US3254343A (en) 1966-05-31

Family

ID=7505769

Family Applications (1)

Application Number Title Priority Date Filing Date
US224935A Expired - Lifetime US3254343A (en) 1961-09-27 1962-09-20 Lattice tower supporting interior dipoles with reduced interference

Country Status (3)

Country Link
US (1) US3254343A (enrdf_load_stackoverflow)
DE (1) DE1303212B (enrdf_load_stackoverflow)
GB (1) GB950716A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3394377A (en) * 1965-03-30 1968-07-23 Alford Andrew Slot antenna mounted within openwork support tower
US4145696A (en) * 1976-01-12 1979-03-20 Societe Lannionnaise D'electronique Sle-Citerel Broad band, omnidirectional UHF, VHF antenna
US5649402A (en) * 1995-09-01 1997-07-22 Fwt, Inc. Antenna support for power transmission tower
EP0980156A3 (en) * 1998-07-15 2001-12-05 Norweb Plc Radio broadcasting system comprising an antenna system, which is constituted by at least a portion of the above-ground component of an electricity distribution network

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2495275B1 (fr) * 1980-12-01 1986-02-07 Lerc Structure en treillis, en particulier mat-support d'antenne

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2254697A (en) * 1940-03-25 1941-09-02 Gen Electric Antenna system
US2583287A (en) * 1948-05-12 1952-01-22 Andrews Johnnie Radio tower antenna
US2771606A (en) * 1953-02-11 1956-11-20 Itt Ultra-high frequency antenna system
CH332352A (de) * 1954-04-09 1958-08-31 Siemens Ag Auf einem Mast angeordnete breitbandige Rundstrahlantenne

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2254697A (en) * 1940-03-25 1941-09-02 Gen Electric Antenna system
US2583287A (en) * 1948-05-12 1952-01-22 Andrews Johnnie Radio tower antenna
US2771606A (en) * 1953-02-11 1956-11-20 Itt Ultra-high frequency antenna system
CH332352A (de) * 1954-04-09 1958-08-31 Siemens Ag Auf einem Mast angeordnete breitbandige Rundstrahlantenne

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3394377A (en) * 1965-03-30 1968-07-23 Alford Andrew Slot antenna mounted within openwork support tower
US4145696A (en) * 1976-01-12 1979-03-20 Societe Lannionnaise D'electronique Sle-Citerel Broad band, omnidirectional UHF, VHF antenna
US5649402A (en) * 1995-09-01 1997-07-22 Fwt, Inc. Antenna support for power transmission tower
US5855103A (en) * 1995-09-01 1999-01-05 Fwt, Inc. Antenna support for power transmission tower
US6026627A (en) * 1995-09-01 2000-02-22 Fwt, Inc. Antenna support for power transmission tower
EP0980156A3 (en) * 1998-07-15 2001-12-05 Norweb Plc Radio broadcasting system comprising an antenna system, which is constituted by at least a portion of the above-ground component of an electricity distribution network

Also Published As

Publication number Publication date
GB950716A (en) 1964-02-26
DE1303212B (enrdf_load_stackoverflow)

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