EP0403741A3 - Whip antenna - Google Patents

Whip antenna Download PDF

Info

Publication number
EP0403741A3
EP0403741A3 EP19900105964 EP90105964A EP0403741A3 EP 0403741 A3 EP0403741 A3 EP 0403741A3 EP 19900105964 EP19900105964 EP 19900105964 EP 90105964 A EP90105964 A EP 90105964A EP 0403741 A3 EP0403741 A3 EP 0403741A3
Authority
EP
European Patent Office
Prior art keywords
coil
lambda
length
antenna
rod
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.)
Granted
Application number
EP19900105964
Other languages
German (de)
French (fr)
Other versions
EP0403741B1 (en
EP0403741A2 (en
Inventor
Horst Dörrie
Uwe Dipl.-Ing. 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 EP0403741A2 publication Critical patent/EP0403741A2/en
Publication of EP0403741A3 publication Critical patent/EP0403741A3/en
Application granted granted Critical
Publication of EP0403741B1 publication Critical patent/EP0403741B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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

Landscapes

  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

The invention is based on the object of developing a known rod- shaped radio antenna, which does not have an approximately circular omnidirectional characteristic when arranged obliquely, such that the antenna operates as an antenna with gain, with a largely circular characteristic, at an inclination angle deviating from the vertical by up to 40 DEG . <??>This object is achieved by an elastic rod (12) of dielectric material being fixedly connected to a spring element (11) and carrying a plurality of coils (SP1 ... SP4) and a radiating part (13). Together with the spring part (11), a first coil (SP1) which is electrically connected to the said spring part (11) has a first length L1 = lambda /4. A second coil (SP2), connected to the first coil (SP1), has a length L2 = lambda /4. A third coil (SP3) is wound running backwards from the end of the second coil (SP2) and has a length L3 = lambda /8. A fourth coil (SP4) is wound from the end of the third coil (SP3) parallel to the second coil (SP2). A radiating part (13), having a length L4 = 3/8 lambda , is connected to the fourth coil (SP4). In this case, lambda is the mean operating wavelength of the relevant radio band. <??>A preferred area of application for the rod-shaped radio antenna is the Radio Network C of the German Federal Post Office. <??>The drawing shows a winding layout for the rod-shaped radio antenna. <IMAGE>
EP90105964A 1989-06-19 1990-03-29 Whip antenna Expired - Lifetime EP0403741B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3919884A DE3919884C2 (en) 1989-06-19 1989-06-19 Rod-shaped radio antenna
DE3919884 1989-06-19

Publications (3)

Publication Number Publication Date
EP0403741A2 EP0403741A2 (en) 1990-12-27
EP0403741A3 true EP0403741A3 (en) 1991-05-29
EP0403741B1 EP0403741B1 (en) 1994-06-01

Family

ID=6382985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105964A Expired - Lifetime EP0403741B1 (en) 1989-06-19 1990-03-29 Whip antenna

Country Status (5)

Country Link
US (1) US5061942A (en)
EP (1) EP0403741B1 (en)
AT (1) ATE106612T1 (en)
DE (2) DE3919884C2 (en)
DK (1) DK0403741T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5359340A (en) * 1992-09-30 1994-10-25 Fujitsu Limited Helical antenna for portable radio communication equipment
AU661628B2 (en) * 1993-01-29 1995-07-27 Motorola, Inc. Antenna assembly for radio circuit and method therefor
DE202005008338U1 (en) * 2005-05-24 2005-12-22 Fuba Automotive Gmbh & Co. Kg Antenna configuration for radio reception in motor vehicle e.g. cabriolet, has bulk connection for transducers and arranged in roof system, over springy contact that is between movable metallic components of system and metallic carriage
RU2755589C1 (en) * 2020-03-23 2021-09-17 Федеральное государственное казенное военное образовательное учреждение высшего образования "Военная академия войсковой противовоздушной обороны Вооруженных Сил Российской Федерации имени Маршала Советского Союза А.М. Василевского" Министерства обороны Российской Федерации Common-mode straight-line vhf pin antenna array

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE864710C (en) * 1951-08-21 1953-01-26 Sihn Kg Wilhelm Jun Flexible rod antenna, especially for vehicles
FR2001420A1 (en) * 1968-02-06 1969-09-26 Ohkubo Yoshie PREPARATION OF AN ANTENNA TO MAKE AN ELECTROCONDUCTOR A SOFT INSULATING ROD
US3541554A (en) * 1967-10-09 1970-11-17 Coil Research L Tunable whip antenna
DE2257352A1 (en) * 1972-11-22 1974-05-30 Kathrein Werke Kg VEHICLE ANTENNA
US4375642A (en) * 1980-09-25 1983-03-01 Robert Bosch Gmbh Rod antenna, particularly for mobile FM signal transducing applications
DE8622412U1 (en) * 1986-08-21 1986-11-20 Hummel, Peter, 7012 Fellbach, De

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097867A (en) * 1975-09-23 1978-06-27 James Joseph Eroncig Helical antenna encased in fiberglass body
US4101898A (en) * 1976-07-26 1978-07-18 David Lee Ingram Base fed, top-loaded vertical whip antenna
US4161737A (en) * 1977-10-03 1979-07-17 Albright Eugene A Helical antenna
US4163981A (en) * 1978-03-27 1979-08-07 Wilson Thomas J Spring tunable helical whip antenna
US4490727A (en) * 1979-10-18 1984-12-25 Mobile Mark, Inc. Adjustable top loaded antenna
US4404564A (en) * 1980-01-09 1983-09-13 Wilson George P Attachment for antennas to improve reception and transmission
US4675687A (en) * 1986-01-22 1987-06-23 General Motors Corporation AM-FM cellular telephone multiband antenna for motor vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE864710C (en) * 1951-08-21 1953-01-26 Sihn Kg Wilhelm Jun Flexible rod antenna, especially for vehicles
US3541554A (en) * 1967-10-09 1970-11-17 Coil Research L Tunable whip antenna
FR2001420A1 (en) * 1968-02-06 1969-09-26 Ohkubo Yoshie PREPARATION OF AN ANTENNA TO MAKE AN ELECTROCONDUCTOR A SOFT INSULATING ROD
DE2257352A1 (en) * 1972-11-22 1974-05-30 Kathrein Werke Kg VEHICLE ANTENNA
US4375642A (en) * 1980-09-25 1983-03-01 Robert Bosch Gmbh Rod antenna, particularly for mobile FM signal transducing applications
DE8622412U1 (en) * 1986-08-21 1986-11-20 Hummel, Peter, 7012 Fellbach, De

Also Published As

Publication number Publication date
DK0403741T3 (en) 1994-09-19
DE3919884C2 (en) 1994-05-19
EP0403741B1 (en) 1994-06-01
ATE106612T1 (en) 1994-06-15
DE59005882D1 (en) 1994-07-07
US5061942A (en) 1991-10-29
DE3919884A1 (en) 1990-12-20
EP0403741A2 (en) 1990-12-27

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