US2963704A - Antenna - Google Patents

Antenna Download PDF

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Publication number
US2963704A
US2963704A US483022A US48302255A US2963704A US 2963704 A US2963704 A US 2963704A US 483022 A US483022 A US 483022A US 48302255 A US48302255 A US 48302255A US 2963704 A US2963704 A US 2963704A
Authority
US
United States
Prior art keywords
antenna
inductor
conductor
ribbon
mast
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
US483022A
Other languages
English (en)
Inventor
Yates Lester Raymond
Jr Charles Mervyn Dorsey
Weldon Finley Houston
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.)
Bendix Corp
Original Assignee
Bendix 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 Bendix Corp filed Critical Bendix Corp
Priority to US483022A priority Critical patent/US2963704A/en
Priority to ES0226158A priority patent/ES226158A1/es
Priority to DEB38796A priority patent/DE1084331B/de
Application granted granted Critical
Publication of US2963704A publication Critical patent/US2963704A/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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
    • H01Q1/282—Modifying the aerodynamic properties of the vehicle, e.g. projecting type aerials
    • H01Q1/283—Blade, stub antennas

Definitions

  • This invention relates to radio antennas and more particularly to an antenna especially adapted to airborne installations.
  • antennas intended for use in communications must be able to function effectively over a wide range of frequencies.
  • the antenna impedance must remain matched over this range of frequencies to maintain a low standing wave voltage ratio.
  • Lightning also is a problem and it is desirable that provision be made for a direct path to ground for direct current without impairing the operating qualities of the antenna and with a minimum of added expense.
  • an antenna comprising a thin ribbon of conductive material wound in the form of a spiral about a form having a flattened helical cross-section.
  • the antenna is overcoupled to a base mounted antiresonant circuit.
  • Fig. 1 is a view in elevation of an antenna embodying the invention
  • Fig. 2 is a plan view of the form of anti-resonant circuit utilized in the embodiment of Fig. 1;
  • Fig. 3 is a cross-section view of the antenna of Fig. 1, taken along the line 33;
  • Fig. 4 is a schematic diagram of the antenna and base loading circuit of Fig. 1.
  • a mast shaped form mounted on a base plate 11 which may be a portion of the skin of an aircraft.
  • the form 10 may be made of any suitable dielectric material having the necessary strength, such as Bakelite or any of various available moldable plastic compositions.
  • the cross-sectional shape of the mast is that of a flattened oval as shown in Fig. 3, and the mast may be raked 7 back from the vertical as shown in Fig. 1, to provide good aerodynamical characteristics.
  • Wound around the mast in the form of a helix is a thin ribbon conductor 12.
  • the ends of the ribbon are secured to the form as indicated at 13 and 14 by any desired conventional fastener, such as a screw.
  • the helical conductor is the radiating element of the antenna.
  • the antenna is completed by an anti-resonant circuit, mounted on the base 11, to which the helical element 12 is overcoupled.
  • the anti-resonant circuit is preferably composed of a hair-pin type inductor 15, illustrated in Figs. 1 and 2, having its ends slotted, as at 16, and having a fixed capacitor 17 conductively secured between its ends.
  • the lower end of the radiating element 12 is connected to an intermediate point of the inductor 15 by a conductor 18.
  • the antenna is fed by means of a coaxial transmission line 20, the outer conductor of which is connected to the base plate 11 which acts as ground and the inner conductor of which is connected to an intermediate point of the inductor 15 by means of a conductor 19.
  • the slots 16 in the ends of the inductor pro vide for its adjustment by movement of the capacitor therealong.
  • the latter circuit transforms and parallel compensates the impedance of the radiating element to produce a low standing wave ratio.
  • the mast was fourteen inches long, three and a half inches wide, and one half inch thick at its thickest point.
  • the radiating element was a ribbon of copper one half inch wide connected by the anti-resonant circuit to a fifty ohm transmission line. With this construction the standing wave ratio did not exceed 1.8 at any point within the range. The horizontal component of the signal was negligible.
  • the mast and radiating element may be covered with a coating of dielectric material if desired, or an aerodynamically shaped housing of similar material may be placed over it.
  • lightning protection is built into the construction by virtue of the direct conductive path from the radiating element 12 through the upper end of the coil 15 as shown in Fig. 4 and thence to ground 11.
  • An antenna comprising an elongated form of dielectric material having a cross-section shaped in the form of a flattened oval, a conductive ribbon wound upon said form in a helix, means for mounting said form with a base end adjacent a ground plane and projecting from said ground plane with one end of said ribbon adjacent and the other end remote from said ground plane, a U- shaped inductor at said base end having opposed slots in the free ends of said U-shape and a connection to said ground plane from a point on one side of said U-shape, a capacitor of magnitude to resonate said inductor at signal frequency selectively positioned in said slots, a two conductor transmission line having one conductor connected to said ground plane, and the other conductor connected to said inductor, and a direct connection between said inductor and said one end of said ribbon, said connections to said inductor being at spaced points remote from the terminals of said capacitor.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Fluid Mechanics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Aerials (AREA)
US483022A 1955-01-20 1955-01-20 Antenna Expired - Lifetime US2963704A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US483022A US2963704A (en) 1955-01-20 1955-01-20 Antenna
ES0226158A ES226158A1 (es) 1955-01-20 1956-01-18 PERFECCIONAMIENTOS EN ANTENAS RADIOELECTRICAS, ESPECIALMENTE EN LAS DESTINADAS A LA AVIACIoN
DEB38796A DE1084331B (de) 1955-01-20 1956-01-19 Antennenanordnung fuer Luftfahrzeuge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US483022A US2963704A (en) 1955-01-20 1955-01-20 Antenna

Publications (1)

Publication Number Publication Date
US2963704A true US2963704A (en) 1960-12-06

Family

ID=23918324

Family Applications (1)

Application Number Title Priority Date Filing Date
US483022A Expired - Lifetime US2963704A (en) 1955-01-20 1955-01-20 Antenna

Country Status (3)

Country Link
US (1) US2963704A (de)
DE (1) DE1084331B (de)
ES (1) ES226158A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956750A (en) * 1974-01-07 1976-05-11 Jones Warren S Portable antenna for use within a vehicle
DE2911885A1 (de) * 1978-03-27 1979-10-11 Avanti Research & Dev Ortsveraenderbare uebertragungs-antennenanordnung
US4847627A (en) * 1987-09-08 1989-07-11 Lockheed Corporation Compact wave antenna system
US5841407A (en) * 1996-10-11 1998-11-24 Acs Wireless, Inc. Multiple-tuned normal-mode helical antenna
US6292156B1 (en) 1997-07-15 2001-09-18 Antenex, Inc. Low visibility radio antenna with dual polarization
US20050200554A1 (en) * 2004-01-22 2005-09-15 Chau Tam H. Low visibility dual band antenna with dual polarization

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2081274A (en) * 1933-11-02 1937-05-25 Lorenz C Ag Antenna structure
US2575377A (en) * 1945-11-13 1951-11-20 Robert J Wohl Short wave antenna
US2652492A (en) * 1949-03-05 1953-09-15 Collins Radio Co Dipole antenna and feed arrangement therefor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE861118C (de) * 1940-12-21 1952-12-29 Telefunken Gmbh Antennenanordnung fuer ultrakurze Wellen
FR946920A (fr) * 1946-05-21 1949-06-17 Philips Nv Antenne
DE872379C (de) * 1949-12-09 1953-03-30 Siemens Ag Stoerungsarme Empfangsantenne
DE855582C (de) * 1950-06-15 1952-11-13 Siemens Ag Breitbandstrahler

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2081274A (en) * 1933-11-02 1937-05-25 Lorenz C Ag Antenna structure
US2575377A (en) * 1945-11-13 1951-11-20 Robert J Wohl Short wave antenna
US2652492A (en) * 1949-03-05 1953-09-15 Collins Radio Co Dipole antenna and feed arrangement therefor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956750A (en) * 1974-01-07 1976-05-11 Jones Warren S Portable antenna for use within a vehicle
DE2911885A1 (de) * 1978-03-27 1979-10-11 Avanti Research & Dev Ortsveraenderbare uebertragungs-antennenanordnung
US4238799A (en) * 1978-03-27 1980-12-09 Avanti Research & Development, Inc. Windshield mounted half-wave communications antenna assembly
US4847627A (en) * 1987-09-08 1989-07-11 Lockheed Corporation Compact wave antenna system
US5841407A (en) * 1996-10-11 1998-11-24 Acs Wireless, Inc. Multiple-tuned normal-mode helical antenna
US6292156B1 (en) 1997-07-15 2001-09-18 Antenex, Inc. Low visibility radio antenna with dual polarization
US20050200554A1 (en) * 2004-01-22 2005-09-15 Chau Tam H. Low visibility dual band antenna with dual polarization
US7209096B2 (en) 2004-01-22 2007-04-24 Antenex, Inc. Low visibility dual band antenna with dual polarization

Also Published As

Publication number Publication date
ES226158A1 (es) 1956-03-01
DE1084331B (de) 1960-06-30

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