US2263460A - Antenna structure - Google Patents

Antenna structure Download PDF

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Publication number
US2263460A
US2263460A US58314A US5831436A US2263460A US 2263460 A US2263460 A US 2263460A US 58314 A US58314 A US 58314A US 5831436 A US5831436 A US 5831436A US 2263460 A US2263460 A US 2263460A
Authority
US
United States
Prior art keywords
mast
capacity
dipole
ropes
antenna structure
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
US58314A
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English (en)
Inventor
Gerth Felix
Hahnemann Walter Max
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
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 Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of US2263460A publication Critical patent/US2263460A/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
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of element
    • H01Q9/34—Mast, tower, or like self-supporting or stay-supported antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of element
    • H01Q9/36—Vertical arrangement of element with top loading

Definitions

  • antenna structures intended for broadcasting arrangements as provided by the invention have a self-oscillating mast, that extends to the earths surface and is excited at its lower end while operating as a dipole which has capacity surfaces at its upper and lower ends and whose centre of oscillation is a quarter of a wavelength, or nearly so, above the earths surface.
  • the mast height in the case of the Blau-KnoX-antenna is about 0.6 i, if i is the operative wavelength.
  • the method of exciting a mast as a dipole fed at its lower end has the advantage that the mast height may be much less than in other cases. In general a height equal to 0.4 A will be sufficient.
  • Figs. l, 2, 3 and 4 are diagrammatic elevations showing each one embodiment of the invention, Fig. 4 being in the nature of a partial reproduction of Fig. l.
  • the oscillating mast I is not in itself proof against breaking down and is therefore attached to the ground by span ropes 2, 3, 4 arranged around the mast in the usual manner.
  • the ropes are subdivided at suitable points by insulators I6 in a manner well known per se.
  • the ropes 2, 4 are arranged also to form capacity surfaces at the two ends of the dipole constituted by the mast. To such end they have bronze parts I1 by which they are attached to the mast. These parts I1 are represented by heavy lines.
  • the ybronze parts I1 are connected to each other by conduc- 55 tors 5, 6.
  • the rope parts l1 are attached to the mast directly.
  • This mode however has the disadvantage that a subsequent tuning of the mast is not possible.
  • the initial design of the mast should be such that the dimensions of the mast are inherently tuned to the desired wavelength. It is advantageous however to provide for a subsequent slight tuning.
  • This in the case represented is accomplished by the conductors 5, 6 not being conductively connected to the mast directly but through tuning coils 1, 8.
  • the tuning may be effected by varying these coils, but may be performed also by varying the number of bronze parts I1 attached to the mast and thus increasing or decreasing the capacity surface.
  • This mode however has the disadvantage that the radiation diagram will be somewhat unsymmetrical.
  • I8 denotes the transmission line from which the dipole is fed over a coupling device I9.
  • the mast shown in Fig. 2 is in itself proof against breaking down and is therefore only at its middle attached to the ground by span ropes I0.
  • Ropes II are arranged to form an upper capacity surface, these ropes having bronze parts I'I at the top of the mast.
  • a lower capacity surface is formed of bronze ropes I 2 which are connected with the ropes I0.
  • Such ropes I2 may be provided also in the case of arrangements of the kind shown in Fig. l, as will appear from Fig. 4, and here present the advantage that the lower capacity surface is more remote from the earth surface, thus causing the current loop to be at a higher level than otherwise.
  • a broadcast antenna structure comprising a continuous conducting mast extending upward from the surface of the earth to a height of about two-fifths of a Wavelength at the frequency to be radiated, a plurality of tension members having insulated conductive portions for staying said mast, a plurality of said portions of said tension members being disposed to form an extended capacity surface adjacent an upper point of said mast and a further plurality of said portions of said tension members being disposed to form a second capacity surface adjacent an intermediate point of said mast remote from the surface of the earth, means for connecting each of said capacity surfaces to the adjacent point of the mast whereby the portion of the mast between said points constitutes a dipole connected at each end to a capacity surface, means for eX- citing said dipole at its lower end at the frequency to be radiated, the dimensions of said portion and said surfaces having such Values that the natural resonance frequency of said di'- pole and capacity surfaces is inherently approximately equal to the frequency to be radiated, and the heights of said capacity surfaces above the surface of the earth being such that the center of

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  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
US58314A 1935-01-12 1936-01-09 Antenna structure Expired - Lifetime US2263460A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE451201X 1935-01-12

Publications (1)

Publication Number Publication Date
US2263460A true US2263460A (en) 1941-11-18

Family

ID=6538492

Family Applications (1)

Application Number Title Priority Date Filing Date
US58314A Expired - Lifetime US2263460A (en) 1935-01-12 1936-01-09 Antenna structure

Country Status (3)

Country Link
US (1) US2263460A (fr)
FR (1) FR798677A (fr)
GB (1) GB451201A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508657A (en) * 1945-11-06 1950-05-23 Decca Record Co Ltd Aerial system
US3253279A (en) * 1963-02-01 1966-05-24 Trg Inc Bandwidth monopole antenna having low ground losses due to a circumferential ground ring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508657A (en) * 1945-11-06 1950-05-23 Decca Record Co Ltd Aerial system
US3253279A (en) * 1963-02-01 1966-05-24 Trg Inc Bandwidth monopole antenna having low ground losses due to a circumferential ground ring

Also Published As

Publication number Publication date
GB451201A (en) 1936-07-31
FR798677A (fr) 1936-05-23

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