EP0374371B1 - Antenne en tige pour la réception de télévision - Google Patents

Antenne en tige pour la réception de télévision Download PDF

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Publication number
EP0374371B1
EP0374371B1 EP89116288A EP89116288A EP0374371B1 EP 0374371 B1 EP0374371 B1 EP 0374371B1 EP 89116288 A EP89116288 A EP 89116288A EP 89116288 A EP89116288 A EP 89116288A EP 0374371 B1 EP0374371 B1 EP 0374371B1
Authority
EP
European Patent Office
Prior art keywords
rod antenna
winding
rod
antenna according
length
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
EP89116288A
Other languages
German (de)
English (en)
Other versions
EP0374371A1 (fr
Inventor
Horst Dörrie
Uwe Militz
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0374371A1 publication Critical patent/EP0374371A1/fr
Application granted granted Critical
Publication of EP0374371B1 publication Critical patent/EP0374371B1/fr
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
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • H01Q9/145—Length of element or elements adjustable by varying the electrical length
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements

Definitions

  • the invention is based on a rod antenna according to the preamble of claim 1.
  • a rod antenna is known (EP-A-0 048 788) which is intended in particular for VHF radio reception. With this antenna, two windings are wound in opposite directions on an antenna rod.
  • a rod antenna is also known (GB-A-2,030,778), which is suitable for several frequency ranges, such as the AM and FM broadcasting range and the Citizen-Band radio.
  • the antenna rod of this antenna carries three different, connected impedance elements.
  • Rod antennas for the reception of VHF and UHF television transmitters have hitherto only been known as telescopic antennas, the telescope length being changed more or less depending on the reception area.
  • the invention has for its object to develop a rod antenna according to the preamble of claim 1 such that the rod antenna is suitable for both VHF and UHF television reception without a telescope that can be changed in length.
  • FIG. 1 An embodiment of the invention is shown in the drawing using a figure and is explained in more detail below.
  • the figure shows a rod antenna in section.
  • 10 denotes a rod antenna made of a conically tapered insulating rod 11 with two windings 12 and 13 connected to one another, of which the first winding 12 ends before the free end 14 of the insulating rod 11. While the windings of the first winding 12 are wound with a relatively large pitch, the windings are the second. Winding 13, for example, wound without a slope. The second winding 13 is divided into two sections 14 and 18. Between the penultimate turn 15 and the last turn 16 of the first section 14, a first turn 17 of the second section 18 is contained, the other end 19 of which is connected to a band-shaped conductor 20.
  • the band-shaped conductor is surrounded by a metallic sleeve 23, which at the same time connects a first threaded bolt 24 to one. Encloses end.
  • the other end of the threaded bolt carries a threaded pin 25 which is screwed into a helical spring 26.
  • a threaded pin 27 of a second threaded bolt 28 is screwed into the other end of the helical spring 26 and carries a further threaded pin 29 at its free end for fastening the rod antenna.
  • the threaded bolt 28 forms the base of the rod antenna.
  • An electrically conductive band 30 bridges the helical spring and is clamped with its ends between the threaded pins 25 and 27 and the associated ends of the helical spring 26.
  • the windings 12 and 13 consist of an insulated wire, preferably of enamelled copper wire. With the exception of the further set screw 29, the entire rod antenna is surrounded by an elastic plastic sleeve 31.
  • the overlapping turns 15, 16, 17 of the sections 14 and 18 of the second winding 13 form a capacitor which connects the windings 12 and 13 with the remaining part of the rod antenna, that is to say the sleeve 23, the first threaded bolt 24, the helical spring 26 and the second threaded bolt 28, capacitively couples.
  • the length l1 between the base of the rod antenna 10 and the coupling means 15, 16, 17 and the second winding 13 for example ⁇ U / 4, where ⁇ U is the average operating wavelength of the UHF range, and the length l2 between the base and the free end of the first winding 12, for example ⁇ V / 4, where ⁇ V is the average operating wavelength of the VHF range, then the length l 1 of the rod antenna 10 acts as a UHF antenna and the length l 2 as a VHF antenna.
  • the rod antenna can be screwed with its grub screw 29 into a swivel bracket which is attached, for example, to the roof of a vehicle.
  • the antenna can be aligned either at 90 ° or at 0 ° to the horizontal and thus receive vertically or horizontally polarized waves.

Landscapes

  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Claims (6)

  1. Antenne en tige pour la réception de télévision comprenant deux enroulements (12, 13) reliés l'un à l'autre, portés par une tige isolante élastique (11), munis à une extrémité d'un ressort hélicoïdal (26) et dont l'extrémité libre forme le pied de l'antenne, l'autre extrémité étant couplée au second enroulement (13), antenne caractérisée en ce qu'entre le second enroulement (13) et l'extrémité du ressort (26) opposée au pied de l'antenne en tige, il y a des moyens de couplage (15, 16, 17) et la longueur (l₁) comprise entre le pied et les moyens de couplage capacitifs correspond sensiblement à λU/4 et la longueur (l₂) de l'ensemble de l'antenne en tige (10) correspond sensiblement à λV/4, λU étant la longueur d'onde moyenne de fonctionnement pour la plage UHF et λV la longueur d'onde moyenne de fonctionnement pour la plage VHF.
  2. Antenne en tige selon la revendication 1, caractérisée en ce que les moyens de couplage capacitifs (15, 16, 17) se composent d'une première spire (17) d'un second segment (18) du second enroulement, spire prévue entre les deux dernières spires (15, 16) du premier segment (14) du second enroulement (13) et en ce que le fil des deux segments (14, 18) est un fil isolé.
  3. Antenne en tige selon la revendication 1, caractérisée en ce que le premier enroulement (12) a une pente beaucoup plus importante que celle du second enroulement (13).
  4. Antenne en tige selon la revendication 1, caractérisée en ce que l'antenne (10) est entourée sur toute sa longueur d'une gaine élastique en matière plastique (31).
  5. Antenne en tige selon la revendication 1, 3 ou 4, caractérisée en ce qu'en avant de l'extrémité libre (14) de la tige isolante (11) il y a une zone sans enroulement.
  6. Antenne en tige selon l'une des revendications 1 à 5, caractérisée en ce que le ressort hélicoïdal (26) est shunté électriquement par un conducteur en forme de ruban (30).
EP89116288A 1988-12-20 1989-09-04 Antenne en tige pour la réception de télévision Expired - Lifetime EP0374371B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3842854 1988-12-20
DE3842854A DE3842854A1 (de) 1988-12-20 1988-12-20 Stabantenne fuer den fernsehempfang

Publications (2)

Publication Number Publication Date
EP0374371A1 EP0374371A1 (fr) 1990-06-27
EP0374371B1 true EP0374371B1 (fr) 1993-07-28

Family

ID=6369614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116288A Expired - Lifetime EP0374371B1 (fr) 1988-12-20 1989-09-04 Antenne en tige pour la réception de télévision

Country Status (4)

Country Link
US (1) US5057849A (fr)
EP (1) EP0374371B1 (fr)
JP (1) JPH02218201A (fr)
DE (2) DE3842854A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6297711B1 (en) 1992-08-07 2001-10-02 R. A. Miller Industries, Inc. Radio frequency multiplexer for coupling antennas to AM/FM/WB, CB/WB, and cellular telephone apparatus
US6396365B1 (en) 1963-07-16 2002-05-28 R.A. Miller Industries, Inc. Multiplexer for cellular telephone
US5734352A (en) * 1992-08-07 1998-03-31 R. A. Miller Industries, Inc. Multiband antenna system
FI89646C (fi) * 1991-03-25 1993-10-25 Nokia Mobile Phones Ltd Antennstav och foerfarande foer dess framstaellning
US6384696B1 (en) 1992-08-07 2002-05-07 R.A. Miller Industries, Inc. Multiplexer for sorting multiple signals from an antenna
WO1994003939A1 (fr) * 1992-08-07 1994-02-17 R.A. Miller Industries, Inc. Systeme d'antenne multibande
CA2117561C (fr) * 1993-01-29 1998-04-28 Paul John Moller Antenne pour circuit de radiocommunication et methode connexe
TW295733B (fr) * 1994-09-15 1997-01-11 Motorola Inc
US5583520A (en) * 1995-07-28 1996-12-10 Motorola, Inc. Matched input antenna for a portable radio
KR19990010968A (ko) * 1997-07-19 1999-02-18 윤종용 듀얼밴드 안테나
US6219902B1 (en) 1998-12-21 2001-04-24 T & M Antennas Method for manufacturing a protectively coated helically wound antenna
DE19941501C1 (de) * 1999-08-31 2001-06-28 Bosch Gmbh Robert Biegsamer Antennenstrahler
WO2005117203A2 (fr) * 2004-05-24 2005-12-08 Amphenol-T & M Antennas Plusieurs antennes de bandes et assemblage d'antennes
US8884838B2 (en) * 2012-05-15 2014-11-11 Motorola Solutions, Inc. Multi-band subscriber antenna for portable two-way radios
US9887462B2 (en) * 2013-10-31 2018-02-06 Motorola Solutions, Inc. Antenna with embedded wideband matching substrate

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145693A (en) * 1977-03-17 1979-03-20 Electrospace Systems, Inc. Three band monopole antenna
DE2729748A1 (de) * 1977-07-01 1979-01-11 Fte Maximal Fernsehtech Fernsehantenne fuer fahrzeuge, insbesondere kraftfahrzeuge, wohnwagen, boote o.dgl.
US4229743A (en) * 1978-09-22 1980-10-21 Shakespeare Company Multiple band, multiple resonant frequency antenna
DE3036084A1 (de) * 1980-09-25 1982-04-29 Robert Bosch Gmbh, 7000 Stuttgart Stabantenne, insbesondere fuer ukw-rundfunkempfang
US4442438A (en) * 1982-03-29 1984-04-10 Motorola, Inc. Helical antenna structure capable of resonating at two different frequencies
DE8320098U1 (de) * 1983-07-08 1983-12-22 Scheer, Hans-Dieter, 1000 Berlin Wendelantenne
US4730195A (en) * 1985-07-01 1988-03-08 Motorola, Inc. Shortened wideband decoupled sleeve dipole antenna
US4675687A (en) * 1986-01-22 1987-06-23 General Motors Corporation AM-FM cellular telephone multiband antenna for motor vehicle

Also Published As

Publication number Publication date
US5057849A (en) 1991-10-15
DE3842854A1 (de) 1990-06-21
DE58905049D1 (de) 1993-09-02
JPH02218201A (ja) 1990-08-30
EP0374371A1 (fr) 1990-06-27

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