US2218741A - Antenna for broad frequency bands - Google Patents

Antenna for broad frequency bands Download PDF

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Publication number
US2218741A
US2218741A US271489A US27148939A US2218741A US 2218741 A US2218741 A US 2218741A US 271489 A US271489 A US 271489A US 27148939 A US27148939 A US 27148939A US 2218741 A US2218741 A US 2218741A
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US
United States
Prior art keywords
cone
antenna
resistance
capacity
surge impedance
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
US271489A
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English (en)
Inventor
Buschbeck Werner
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.)
Telefunken AG
Original Assignee
Telefunken 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 Telefunken AG filed Critical Telefunken AG
Application granted granted Critical
Publication of US2218741A publication Critical patent/US2218741A/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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • 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
    • H01Q9/40—Element having extended radiating surface

Definitions

  • Antennae of this kind comprise a k/ i' radiatorsin the form of .an inverted cone, that is, a cone set on its apex.
  • an antenna arrangement especially an antenna arrangement. de; signed for a broad frequency band in the form of a coneor double-cone has this outstanding feature'that the broad end (base) of the cone is coupled with a space capacity through an ohmic resistance having a value equal to the constant surge impedance of the cone.
  • the obtuse end or base of the'cone is connected with a space capacity, the latter, for instance, being in the form of a flat sheet or plate. Connection is established through an ohmic resistance, the
  • Figure 1 illustrates an embodiment "of the present invention employing a single vertical cone radiator
  • Figure 1a illustrates an equivalent circuit organization for an antenna as shown in Figure 1
  • Figure 2 illustrates a-modification' of Figure l employing a double cone radiator
  • Figure 3 illustrates another modification of' Figure 1.
  • coneK is connected to the inner conductorof an energy lead or ,co-axial cable E the outer conductor of' which is connected with'the grounding sheet B.
  • .C'onnected with the obtuse end or base of the cone 20 are resistances R which unite the cone with a capacity'sheet C5
  • the paralleled resistances R have anaggregate-value which is equal to the surge impedance Z of the cone aerial.
  • the energy 3 feeder is representedby a generatorGwhose internal resistance is equal to the surge impedance of'the energy feeder (or co-axial cable).
  • the said generator is connected with the cone an-' tenna K which has the same surge impedance as 3 the energy feeder so that no reflections will occur.
  • The-base end of the cone antenna is connected through the surge impedance R with the space capacity C by which a capacitive connection is established to ground.- It will be noticed that 40 reflections are not produced at any place in this organization, hence, no standing waves are able to arise.
  • Figure 2 shows another circuit organization which comprises two cones A and B having their 45 apices united or placed opposite each other.
  • feeding of the two cones is in push-pull or phase opposition, preferably by way of a coaxial energy feeder lead E arranged in the axis v of the cone, though the feed could be effected justv 50 as readily by way of a two-wire line brought to the cone apex from the side.
  • the bases of the cones are united by way of a number of resistances R, each having such a value that by being paralleled, their combined resistance is equal to. 5 5,
  • the surge impedance of the cone with capacity surfaces CA and CB, respectively, or else the lower cone may be grounded directly by way of a resistance.
  • a similar arrangement may also be carried into effect with an upright cone only. In this arrangement the base surface of the cone is grounded by way of the surge impedance, while a counterpoise is provided opposite the apex of the cone.
  • Figure 3 illustrates a further arrangement according to the invention in which the capacity surface C (which, instead of consisting of a plate or sheet could also consist of a hemisphere), is arranged in the very base surface of the cone rather than in superposed or in subjacent relation thereto, while being connected by resistances R with the periphery of the cone base surface.
  • the various paralleled resistances R may also be replaced by a ring made of resistance material the dimensions and resistivity being chosen to suit the case.
  • the said ring has the form of a cylindrical shell which connects the periphery of the base of the cone with the capacity surface, while the ring in an arrangement as in Figure 3 is a fiat circular ring whose inner contour is connected with the capacity sheet, while its outer periphery is united with the circumference of the cone shell.
  • a short wave antenna comprising two surfaces of revolution in the form of cones symmetrically located with respect to a common axis passing through their apices, said apices being adjacent one another, a high frequency apparatus connected to said apices the length and diameter of each of said surfaces of revolution being such that the impedance of said antenna is substantially pure resistance of substantially constant magnitude over a wide range of frequencies, a pair of capacity sheets located in planes perpendicular to the axis of said cones, the base edge of each of said cones being connected to one of said capacity sheets by a substantially uniformly distributed resistance, the aggregate value thereof being equal to the surge impedance of said cone.
  • 111 combination with a short wave antenna comprising a surface of revolution in the form of a cone, transmitting apparatus and a line connecting said transmitting apparatus to the apex of said cone, the length and diameter of said surface being such that the impedance of said antenna is substantially a pure resistance of substantially constant magnitude over a wide range of frequencies and a capacity sheet located in a plane perpendicular to the axis of said cone, the base edge of said cone being connected to said sheet by a substantially uniformly distributed resistance, the aggregate value of said resistance being equal to the surge impedance of said cone.
  • a short wave antenna comprising a conical surface of revolution, a high frequency apparatus connected to the apex of said cone, the length and diameter of said surface of revolution being such that the impedance of said antem'ia is substantially a pure resistance of substantially constant magnitude over a wide range of frequencies, a capacity sheet located in the plane of the base of said cone, the base edge of said cone being connected to said sheet by a substantially uniformly distributed resistance, the value thereof being equal to the surge impedance of said cone.
  • a short wave antenna comprising a pair of conical surfaces of revolution symmetrically located with respect to a common axis passing through their apices, said apices being adjacent one another, a high frequency apparatus connected to said apices, the length and diameter of said surfaces of revolution being such that the impedance of said antenna is substantially pure resistance of substantially constant magnitude over a wide range of frequencies, a capacity sheet located in the plane of the base of each of said cones, thebase edge of each of said cones being connected to the adjacent sheet by a substantially uniformly distributed resistance, the aggregate value. thereof being equal to the surge impedance of said cone.

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  • Coils Or Transformers For Communication (AREA)
  • Details Of Aerials (AREA)
US271489A 1938-05-24 1939-05-03 Antenna for broad frequency bands Expired - Lifetime US2218741A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE529152X 1938-05-24

Publications (1)

Publication Number Publication Date
US2218741A true US2218741A (en) 1940-10-22

Family

ID=6553963

Family Applications (1)

Application Number Title Priority Date Filing Date
US271489A Expired - Lifetime US2218741A (en) 1938-05-24 1939-05-03 Antenna for broad frequency bands

Country Status (3)

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US (1) US2218741A (fr)
FR (1) FR855117A (fr)
GB (1) GB529152A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2476949A (en) * 1945-08-02 1949-07-26 Robert J Adams Antenna
US2503952A (en) * 1946-03-19 1950-04-11 Rca Corp Traveling wave antenna
US2508438A (en) * 1945-10-16 1950-05-23 Douglas W Wilson Broad band antenna
US2659003A (en) * 1946-04-30 1953-11-10 Dorne Arthur Antenna mountable in small spaces
US2659002A (en) * 1946-03-29 1953-11-10 Price M Keeler Split truncated cone-antenna
US2726388A (en) * 1951-07-26 1955-12-06 Itt Antenna system combinations and arrays
US2964747A (en) * 1958-07-21 1960-12-13 Radiation Inc Vee antenna
US4509056A (en) * 1982-11-24 1985-04-02 George Ploussios Multi-frequency antenna employing tuned sleeve chokes
EP1994604A4 (fr) * 2006-02-28 2013-01-09 Camero Tech Ltd Antenne plate à bande ultra large

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2650441B1 (fr) * 1988-05-16 1991-11-29 Etu Rech Chimiq Lab Antenne radioelectrique a tres large bande et a faible taux d'onde stationnaire
FR2634068B1 (fr) * 1988-07-08 1990-09-14 Thomson Csf Antenne de reception a large bande
US11888246B2 (en) * 2021-11-01 2024-01-30 Src, Inc. Wideband monopole antenna

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2476949A (en) * 1945-08-02 1949-07-26 Robert J Adams Antenna
US2508438A (en) * 1945-10-16 1950-05-23 Douglas W Wilson Broad band antenna
US2503952A (en) * 1946-03-19 1950-04-11 Rca Corp Traveling wave antenna
US2659002A (en) * 1946-03-29 1953-11-10 Price M Keeler Split truncated cone-antenna
US2659003A (en) * 1946-04-30 1953-11-10 Dorne Arthur Antenna mountable in small spaces
US2726388A (en) * 1951-07-26 1955-12-06 Itt Antenna system combinations and arrays
US2964747A (en) * 1958-07-21 1960-12-13 Radiation Inc Vee antenna
US4509056A (en) * 1982-11-24 1985-04-02 George Ploussios Multi-frequency antenna employing tuned sleeve chokes
EP1994604A4 (fr) * 2006-02-28 2013-01-09 Camero Tech Ltd Antenne plate à bande ultra large

Also Published As

Publication number Publication date
FR855117A (fr) 1940-05-03
GB529152A (en) 1940-11-14

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