US3808600A - Radioelectric aerial - Google Patents

Radioelectric aerial Download PDF

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Publication number
US3808600A
US3808600A US00317760A US31776072A US3808600A US 3808600 A US3808600 A US 3808600A US 00317760 A US00317760 A US 00317760A US 31776072 A US31776072 A US 31776072A US 3808600 A US3808600 A US 3808600A
Authority
US
United States
Prior art keywords
disk
aerial
conductors
radioelectric
ground plane
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
US00317760A
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English (en)
Inventor
J Bourdier
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.)
LANNIONNAIS ELECTRONIQUE
SOC LANNIONNAISE D ELECTRONIQUE SLE CITEREL FR
Original Assignee
LANNIONNAIS ELECTRONIQUE
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 LANNIONNAIS ELECTRONIQUE filed Critical LANNIONNAIS ELECTRONIQUE
Application granted granted Critical
Publication of US3808600A publication Critical patent/US3808600A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • 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
    • 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
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the invention comes within the branch of transmitting and receiving aerials for metric or decimetric waves. It concerns an aerial having slight bulk, strongly built, and having self-adapted input impedance. It applies mainly to radio-electric equipment for mobile craft (aircraft, automobiles).
  • a helical aerial which has the disadvantage of being too selective, and for that reason, is difficult to produce on an industrial scale.
  • a single pole aerial having an end charge which has the disadvantage of having such a low impedance at the feed point that it requires a high-ratio feed transformer which is consequently expensive.
  • the aerial according to the invention comprises,
  • two vertical lengths which cross a metallic plate forming a counterweight, extend each other at a slight height above the said plate by two horizontal lengths whose upturned ends are welded to the said plate.
  • One of the vertical lengths rests directly on the said conductive surface, the other crossing. it by means of an insulated bushing which may have-a coaxial cable fitted to it.
  • the impedance on the said bushing may easily be brought to 50 ohms with appropriate values of the other geometrical parameters.
  • FIGS. la, lb, 1c are various views of an aerial according to the invention.
  • FIG. la is a perspective view
  • FIG. lb is a front view
  • FIG. 10 is an end: view;
  • FIG. 2 is the equivalent wiring diagram
  • FIGS. 3a, 3b, 3c are views of another embodiment of the aerial according to the invention.
  • FIGS. 4a and 4b are views of a radome configuration.
  • Elements 1 and 2 are two vertical lengths perpendicular to a conductive ground plane 3.
  • the length 1 is welded at 5' to the said ground plane.
  • the length may be connected by a bushing 4, placed below the plane 3, to a coaxial line 4'.
  • the vertical length I iscontinued at P by a horizontal conductor 9'; the vertical length 2 is continued at Q by a horizontal conductor 10 parallel to the conductor 9and having a same length.
  • the horizontal conductor 9- ends in a short vertical conductor 11 whose end 13 is welded to the disk 6.
  • the horizontal conductor 10 is ended by a short vertical conductor 12 whose end 14 is welded to the disk 6, which is thus held above the ground plane 3.
  • the conductors 9 and 10 form, with the disk 6, two lines of characteristic impedance Z,,, the impedance at P (or at Q) being Z, (or Z where Zp Z).
  • the height of the disk 6 above the plane 3 is designated by h; the length of the horizontal conductor I0 is designated by 1, the height of the horizontal conductor l0'above the disk 6 is designated by u, the diameter of the pass hole 8 has a value of qb.
  • the lengths have a diameter of d, their spacing has a value of m, the disk has a diameter of D.'
  • the three main parameters are: h, D, u, l.
  • the secondary parameters are d, m, (I).
  • FIG. 2 The equivalent diagram comprises, starting from a point B, showing the short-circuit between the horizontal conductors 9 and 10, an induction L of the conductor 9, an induction L of the conductor 10, a capacitor C of the disk 6 and lengths l and 2 in relation to the ground plane.
  • Ll is the induction of the length l and R1 is its radiation resistance and loss resistance
  • L2 is the induction of the length 2 and R2 is its radiation resistance and loss resistance
  • A is the feed point.
  • the resistor R is equal to 10 ohms; therefore, the result obtained is 2,, 50 ohms, a value which is a great advantage, which enables a direct connection on a coaxial feed line having a characteristic Z equal to 50 ohms.
  • FIGS. 3a, 3b, 3c These figures show a version of the aerial according to the invention affording a great advantage, in which-the upper part, the disk 6 and the conductors 9 and 10 are replaced by metallic deposits on the two faces of an insulating substrate, for example epoxy glass.
  • FIG. 3a is a front view
  • FIG. 3c is a plan view of the upper surface of the disk, whose lower face 23 is copper plated all over
  • FIG. 3b is a detailed drawing on a larger scale.
  • the insulating disk is designated by 21, the upper conductors, by 19 and 20 respectively, the shortcircuits between the conductors 19, 20 and the lower face of the disk by 22, 22'. Contact is ensured between the lengths l (2) and the conductors 19 (20) by a connection 24.
  • FIGS. 4a, 4b The aerial assembly according to the invention may be housed in a radome which is shown in FIG. 4a.
  • the radome comprises a hood made of insulating material 30 having an approximately generally hemispherical shape, whose bottom is formed by a metallic disk having an upturned edge 32 which is embedded in the lower edge 31 of the hood 30.
  • a disk made of epoxy glass, such as 21, bearing conductors l9 and 20 (FIG.'3b) is fixed by centering pins 33, 34.
  • the assembly is fixed, for example on the sheet metal roof of a vehicle 36, forming a ground plane, by means of parts 37, 38, for example nuts and bolts.
  • FIG. 4b is a plan view of the disk 21 with its attached parts. The traces of the fixing pins 33, 34 are noticeable thereon.
  • the radiating lengths may be inclined in relation to the vertical in order to bring the center of gravity of the assembly towards the axis, as is visible in FIGS. 4a, 4b.
  • the radome could also be provided with an aerial having a copper disk according to FIG. la.
  • the practical height, including the radome is less than k/IO.
  • the aerial is completely protected against static charges, since it is galvanically connected to the ground.
  • the pass band of the aerial is increased by increasing the radius of the conductive surface.
  • That conductive surface does not necessarily have a circular shape.
  • That conductive surface does not necessarily have a circular shape.
  • it is, to great advantage, given a streamlined shape, as is the radome, to reduce drag.
  • a radioelectric aerial for metric and decimetric waves to be installed above a conductive ground plane comprising first and second conductors of equal length extending substantially vertically in parallel above said ground plane, said first conductor being connected at one end to said ground plane and said second conductor being insulated therefrom, a plane disk supported above said ground plane at a distance approximately equal to the length of said first and second conductors whose ends extend through apertures in said disk, third and fourth conductors extending perpendicularly from said first and second conductors, respectively, at the side of said disk opposite said ground plane, the free ends of said third and fourth conductors being bent vertically into contact with said disk.

Landscapes

  • Details Of Aerials (AREA)
  • Waveguide Aerials (AREA)
US00317760A 1971-12-22 1972-12-22 Radioelectric aerial Expired - Lifetime US3808600A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7146209A FR2164492B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1971-12-22 1971-12-22

Publications (1)

Publication Number Publication Date
US3808600A true US3808600A (en) 1974-04-30

Family

ID=9087901

Family Applications (1)

Application Number Title Priority Date Filing Date
US00317760A Expired - Lifetime US3808600A (en) 1971-12-22 1972-12-22 Radioelectric aerial

Country Status (8)

Country Link
US (1) US3808600A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE792553A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH563670A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2262522C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2164492B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1348620A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT972583B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL173001C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984838A (en) * 1975-05-27 1976-10-05 Textron, Inc. Electrically small, double loop low backlobe antenna
US4107691A (en) * 1977-01-18 1978-08-15 The United States Of America As Represented By The Secretary Of The Army Antenna for phase front homing
WO1984004427A1 (en) * 1983-04-29 1984-11-08 Motorola Inc Two element low profile antenna
US4584585A (en) * 1984-04-04 1986-04-22 Motorola, Inc. Two element low profile antenna
US4849765A (en) * 1988-05-02 1989-07-18 Motorola, Inc. Low-profile, printed circuit board antenna
US5121128A (en) * 1989-03-17 1992-06-09 Lidth De Jeude Johan L Van Glide-slope aerial system
US20060022088A1 (en) * 2003-12-19 2006-02-02 Francis Dazet Aircraft nose with shield
CN113226854A (zh) * 2018-12-26 2021-08-06 原田工业株式会社 车辆用复合天线装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472281B1 (fr) * 1979-12-20 1985-09-06 Rayan Sarl Antenne compacte de hauteur reduite pour l'emission ou la reception des champs electromagnetiques
DE4113277C2 (de) * 1991-04-19 1996-08-08 Hagenuk Telecom Gmbh Antenne für ein mobiles Telefon

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2417793A (en) * 1944-08-01 1947-03-18 Rca Corp Antenna

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566491A (en) * 1946-03-15 1951-09-04 Belmont Radio Corp Antenna construction
GB868557A (en) * 1958-06-05 1961-05-17 Vickers Aircraft Holdings Ltd Improvements in radio aerials
US3184746A (en) * 1961-05-15 1965-05-18 Ryan Aeronautical Co Double loop antenna
US3488657A (en) * 1965-10-18 1970-01-06 Bendix Corp Low profile antenna
DE1591300B2 (de) * 1967-12-12 1973-04-05 Meinke, Hans H., Prof. Dr.; Lindenmeier, Heinz, Dr.-Ing.; 8000 München Antenne mit einem direkt zwischen die eingangsklemmen geschalteten, verstaerkenden dreipol

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2417793A (en) * 1944-08-01 1947-03-18 Rca Corp Antenna

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984838A (en) * 1975-05-27 1976-10-05 Textron, Inc. Electrically small, double loop low backlobe antenna
US4107691A (en) * 1977-01-18 1978-08-15 The United States Of America As Represented By The Secretary Of The Army Antenna for phase front homing
WO1984004427A1 (en) * 1983-04-29 1984-11-08 Motorola Inc Two element low profile antenna
US4494120A (en) * 1983-04-29 1985-01-15 Motorola, Inc. Two element low profile antenna
US4584585A (en) * 1984-04-04 1986-04-22 Motorola, Inc. Two element low profile antenna
US4849765A (en) * 1988-05-02 1989-07-18 Motorola, Inc. Low-profile, printed circuit board antenna
US5121128A (en) * 1989-03-17 1992-06-09 Lidth De Jeude Johan L Van Glide-slope aerial system
US20060022088A1 (en) * 2003-12-19 2006-02-02 Francis Dazet Aircraft nose with shield
US7384015B2 (en) * 2003-12-19 2008-06-10 Airbus France Sa Aircraft nose with shield
CN113226854A (zh) * 2018-12-26 2021-08-06 原田工业株式会社 车辆用复合天线装置
CN113226854B (zh) * 2018-12-26 2022-03-15 原田工业株式会社 车辆用复合天线装置

Also Published As

Publication number Publication date
DE2262522A1 (de) 1973-06-28
IT972583B (it) 1974-05-31
NL173001C (nl) 1983-11-16
BE792553A (fr) 1973-06-12
GB1348620A (en) 1974-03-20
FR2164492A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-08-03
DE2262522C2 (de) 1982-09-23
NL7217611A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-06-26
FR2164492B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1976-03-26
NL173001B (nl) 1983-06-16
CH563670A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-06-30

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