US2081274A - Antenna structure - Google Patents

Antenna structure Download PDF

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Publication number
US2081274A
US2081274A US750697A US75069734A US2081274A US 2081274 A US2081274 A US 2081274A US 750697 A US750697 A US 750697A US 75069734 A US75069734 A US 75069734A US 2081274 A US2081274 A US 2081274A
Authority
US
United States
Prior art keywords
dipole
antenna structure
wire
transmission line
ground
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
US750697A
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English (en)
Inventor
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 US2081274A publication Critical patent/US2081274A/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
    • 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
    • H01Q9/38—Vertical arrangement of element with counterpoise

Definitions

  • a dipole arranged as indicated above is connected to ground at its lower end and is fed at a point at or near the ground.
  • Fig. 1 is a schematic elevation of a dipole structure.
  • Fig. 2 is a view similar to Fig. 1 but drawn to a smaller scale than this. Certain parts represented in Fig. 1 are not shown in Fig. 2, this disclosing instead the current distribution referred to hereafter.
  • the upper half of the dipole comprises a plurality of parallel-fed wiresDo, whilst the lower half comprises a single conductor D.
  • An inductance Ll is inserted between the two sections.
  • the wires D0 are spanned beyond the mast M (shown in broken lines) upon spreaders T in order to avoid too close a proximity of the mast to the potential-carrying parts. For structural reasons this arrangement can be carried out more easily than the erection of a single-wire dipole connected to the top point of the mast.
  • the upper portion has a greater capacity than the usual free-ended single wire dipole.
  • the dipole is energized over a power line at a point at or near the centre of the dipole, that is, over an inductance corresponding to the inductance LI shown in Fig. 1 of the accompanying drawing.
  • the dipole is not fed at a current node but by potential energization from below.
  • An energizing wire F is provided for this purpose, the wire F being grounded over a tuned circuit Q.
  • the power is fed over a transmission line E which is variably coupled to the inductance coil L2 of the circuit Q over an adjustable tapping.
  • a capacity surface or member 0 may be connected to the lower end of the dipole.
  • a wire extending outwards to the mast M is suitable for this purpose.
  • the current distribution obtained is indicated in broken lines in Fig. 2.
  • the current distribution shown in the lower portion F has the advantage that the radiation diagram of the antenna is unfavourably influenced to the least possible degree by the radiation from the portion F.
  • any other suitable coupling may be employed and in particular a coupling which renders it possible to pass from a symmetrical arrangement or transmission line to an asymmetrical arrangement or transmission line, such for example as the transmission line E shown.
  • a vertical dipole positioned with its center of oscillation about a quarter of a wavelength above the earths surface, means including a single energizing wire connecting said dipole to ground and means for feeding said wire at a point substantially at the ground, said dipole having a capacity surface arranged at its lower end whereby a current minimum results at an intermediate point of said energizing line and the radiation diagram of the antenna is unfavourably influenced to the least possible degree by the radiation from said energizing wire.
  • said connecting means comprises a tuned circuit connected to the lower end of the said dipole, and by the provision of an energy supply line adjustably coupled to this tuned circuit.

Landscapes

  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
US750697A 1933-11-02 1934-10-30 Antenna structure Expired - Lifetime US2081274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2081274X 1933-11-02

Publications (1)

Publication Number Publication Date
US2081274A true US2081274A (en) 1937-05-25

Family

ID=7983992

Family Applications (1)

Application Number Title Priority Date Filing Date
US750697A Expired - Lifetime US2081274A (en) 1933-11-02 1934-10-30 Antenna structure

Country Status (2)

Country Link
US (1) US2081274A (fr)
FR (1) FR45262E (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2599705A (en) * 1948-06-16 1952-06-10 Gen Motors Corp Short wave antenna
US2963704A (en) * 1955-01-20 1960-12-06 Bendix Corp Antenna
DE19749750A1 (de) * 1997-11-11 1999-06-02 Hans E Dr Ing Speckter Selbsttragende Rohrmastantenne für Sendeanlagen im oberen Langwellen- und unteren Mittelwellenband

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2599705A (en) * 1948-06-16 1952-06-10 Gen Motors Corp Short wave antenna
US2963704A (en) * 1955-01-20 1960-12-06 Bendix Corp Antenna
DE19749750A1 (de) * 1997-11-11 1999-06-02 Hans E Dr Ing Speckter Selbsttragende Rohrmastantenne für Sendeanlagen im oberen Langwellen- und unteren Mittelwellenband
DE19749750B4 (de) * 1997-11-11 2005-09-08 Speckter, Hans E., Dr.-Ing. Selbsttragende Rohrmastantenne für Sendeanlagen im oberen Langwellen- und unteren Mittelwellenband

Also Published As

Publication number Publication date
FR45262E (fr) 1935-07-22

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