EP1833116A2 - Antenne hélicoïdale quadrifilaire - Google Patents

Antenne hélicoïdale quadrifilaire Download PDF

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Publication number
EP1833116A2
EP1833116A2 EP07075467A EP07075467A EP1833116A2 EP 1833116 A2 EP1833116 A2 EP 1833116A2 EP 07075467 A EP07075467 A EP 07075467A EP 07075467 A EP07075467 A EP 07075467A EP 1833116 A2 EP1833116 A2 EP 1833116A2
Authority
EP
European Patent Office
Prior art keywords
sdars
receiving device
elongated conductors
antenna
conductors
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
EP07075467A
Other languages
German (de)
English (en)
Other versions
EP1833116B1 (fr
EP1833116A3 (fr
Inventor
Korkut Yegin
Daniel G. Morris
William R. Livengood
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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
Priority claimed from US10/999,385 external-priority patent/US7180472B2/en
Application filed by Delphi Technologies Inc filed Critical Delphi Technologies Inc
Publication of EP1833116A2 publication Critical patent/EP1833116A2/fr
Publication of EP1833116A3 publication Critical patent/EP1833116A3/fr
Application granted granted Critical
Publication of EP1833116B1 publication Critical patent/EP1833116B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas

Definitions

  • the present invention relates generally to antenna systems for satellite digital audio radio service and more specifically to a quadrifilar helical antenna used in satellite digital audio radio service communications.
  • SDARS satellite digital audio radio service
  • SDARS systems broadcast high quality uninterrupted audio through satellites and earth-based stations.
  • SDARS systems typically include an antenna with a low-noise amplifier and a receiver.
  • the antenna initially receives encoded signals from the satellites and/or terrestrial transmitters.
  • the amplifier which is conventionally housed within the antenna, amplifies the received signal.
  • the receiver decodes the transmitted signal and provides the signal to the radio.
  • SDARS satellite digital audio radio service
  • An Earth-orbiting satellite 11 broadcasts SDARS signals.
  • the SDARS signals may be received by a SDARS-receiving device 14, such as a radio (shown) or a television (for example), and/or they may be received by stationary transmitters 12.
  • the terrestrial transmitters 12 re-broadcast the SDARS signals, which may then be received by SDARS-receiving devices 14.
  • the SDARS-receiving device includes an antenna (not shown in Figure 1) to receive the broadcast SDARS signals.
  • Typical SDARS-receiving devices further include other components, such as an amplifier, receiver, speakers, etc. to convert the SDARS signals into audible sounds and/or visual images.
  • Terrestrial SDARS-receiving devices commonly use a quadrifilar helix antenna to receive SDARS signals.
  • An exemplary known quadrifilar helix antenna is shown in Figure 2.
  • the illustrated quadrifilar helix antenna 16 includes four conductive elements 18a - 18d, such as electrically-conductive wires, arranged to define two separate helically twisted loops. Each of the loops is connected between an antenna feed and a ground plane, and the conductive elements each fold over itself at a distal point from the antenna feed and the ground plane to form a loop, as shown in Figure 1.
  • the two conductive elements of a quadrifilar helix antenna 16 are excited in phase quadrature. That is, each conductive element is excited at a 90° phase shift from the adjacent conductive element.
  • Conventional quadrifilar helix antennas used in SDARS-receiving devices have a number of disadvantages.
  • Known quadrifilar helix antennas are most effective when receiving signals from a satellite at zenith.
  • Known quadrifilar helix antennas are typically less effective at receiving SDARS signals transmitted from low elevation satellites and from stationary terrestrial transmitters.
  • some SDARS-receiving devices include a second antenna dedicated to receiving SDARS signals from stationary terrestrial transmitters.
  • known quadrifilar helix antennas have limited utility for portable and/or wearable SDARS-receiving devices, such as personal radios, headphones, etc.
  • the antenna for receiving satellite digital audio radio service (SDARS) communications is disclosed.
  • the antenna has a plurality of elongated conductors.
  • the elongated conductors have both a straight portion and a helical portion.
  • FIG 3A illustrates an embodiment of a quadrafilar helix antenna 13 for an SDARS-receiving device.
  • Antenna 13 includes a plurality of elongated conductors 18a - 18d, such as copper wires for example.
  • the conductors 18 are mounted in a mylar base 29, though other types of mounting structures could be used.
  • Each conductor 18 has a substantially straight portion 26a - 26d near the base 29 (shown in Figures 3A and 3B as extending directly from the base 29) and a substantially helical portion 28a - 28d thereafter.
  • the helical portion 28a - 28d of each conductor 18 further extends away from the base 29.
  • the straight portion 26a - 26d is shown as significantly shorter than the helical portion 28a - 28d.
  • the respective lengths of the straight portion 26a - 26d and the helical portion of the conductors 18 may be adjusted relative to each other to optimize signal reception.
  • the conductors 18 are electrically connected together by a substantially circular conductor 20, such as a copper wire.
  • the conductors 18 together approximately define a hollow cylinder shape.
  • the elongated conductors may wrap around a solid core material, such as a dielectric 22, which may be a ceramic material for example.
  • antenna 13 may be electrically coupled to a phasing network at the base 29.
  • the phasing network includes a substrate 27 and a conductive transmission line 30, which electrically couples antenna 13 to other components in an SDARS-receiving device, such as an amplifier (not shown).
  • the phasing network may excite conductors 18 in phase quadrature as is known in the art.
  • FIG 3B illustrates another embodiment of antenna 13.
  • conductors 18 are capacitively loaded, which enables the antenna 13 to be tuned to a particular frequency.
  • Conductors 18 may be capacitively loaded by including a break in one or more of the conductors 18 and maintaining the ends of the conductor at the point of the break in close proximity to each other, as shown at segment A of Figure 3B. This structure effectively creates a capacitive effect at the point of the break (segment A). The voltage differential across the break (segment A) tunes the antenna 13.
  • Other known methods for capacitively loading and/or tuning antenna 13 may also be used.
  • the embodiment of antenna 13 in Figure 3B further includes conductive tuning stubs 24 coupled to conductors 18.
  • Tuning stubs 24 enable impedance matching between the antenna 13 and other proximate components, such as an amplifier, which improves transmission of the SDARS signal from the antenna to other components, such as an amplifier.
  • the impedance of the antenna 13 may be adjusted by varying the length of the tuning stubs 24a - 24d.
  • the above-described embodiments have resulted in the ability to reduce the overall length and volume of the antenna 13 relative to known SDARS antennas. Further, the described configurations have demonstrated increased reception efficiency, including reception of signals from relatively low-elevation satellites and stationary terrestrial transmitters. Additionally, the described configurations have demonstrated less susceptibility to interference from human bodies, thus better enabling them to be used in SDARS-receiving devices configured to be used in close proximity to human bodies, such as personal wearable radios for example. In certain embodiments - for example, when the disclosed SDARS antenna is used in connection with a portable and/or wearable SDARS-receiving device- a hollow bore may be made longitudinally through the dielectric core 22.
  • Audio wires such as for headphones, may be routed through the bore, causing the antenna to appear to be coupled "around" the headphone wire, which improves the aesthetics of the SDARS-receiving device.
  • the antennas 13 described herein can be configured to allow audio wires to pass there through to electrically couple, for example, ear phones 42 to a primary housing 40 (housing an amplifier, receiver, etc.).

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  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
EP07075467.6A 2004-05-26 2005-05-24 Antenne hélicoïdale quadrifilaire Not-in-force EP1833116B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US57452004P 2004-05-26 2004-05-26
US10/999,385 US7180472B2 (en) 2004-05-26 2004-11-30 Quadrifilar helical antenna
EP05076197A EP1601050A3 (fr) 2004-05-26 2005-05-24 Antenne hélicoidale quadrifilaire

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP05076197.2 Division 2005-05-24
EP05076197A Division EP1601050A3 (fr) 2004-05-26 2005-05-24 Antenne hélicoidale quadrifilaire

Publications (3)

Publication Number Publication Date
EP1833116A2 true EP1833116A2 (fr) 2007-09-12
EP1833116A3 EP1833116A3 (fr) 2011-12-28
EP1833116B1 EP1833116B1 (fr) 2013-07-17

Family

ID=38331388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07075467.6A Not-in-force EP1833116B1 (fr) 2004-05-26 2005-05-24 Antenne hélicoïdale quadrifilaire

Country Status (1)

Country Link
EP (1) EP1833116B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016163909A1 (fr) * 2015-04-09 2016-10-13 Limited Liability Company "Topcon Positioning Systems" Antenne hélicoïdale à large bande à motif de coupure
WO2020101519A1 (fr) * 2018-11-13 2020-05-22 Limited Liability Company "Topcon Positioning Systems" Système d'antenne gnss-uhf intégré compact
EP3726650A1 (fr) * 2019-04-19 2020-10-21 Bose Corporation Antenne spirale à bras multiples pour dispositif sans fil
US11525703B2 (en) 2020-03-02 2022-12-13 Bose Corporation Integrated capacitor and antenna

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899549A (en) * 1959-08-11 Antenna and audio connector
GB962100A (en) * 1963-06-14 1964-06-24 County Council Of The Administ Improvements in transportable radio apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899549A (en) * 1959-08-11 Antenna and audio connector
GB962100A (en) * 1963-06-14 1964-06-24 County Council Of The Administ Improvements in transportable radio apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016163909A1 (fr) * 2015-04-09 2016-10-13 Limited Liability Company "Topcon Positioning Systems" Antenne hélicoïdale à large bande à motif de coupure
US9837709B2 (en) 2015-04-09 2017-12-05 Topcon Positioning Systems, Inc. Broadband helical antenna with cutoff pattern
WO2020101519A1 (fr) * 2018-11-13 2020-05-22 Limited Liability Company "Topcon Positioning Systems" Système d'antenne gnss-uhf intégré compact
US11211712B1 (en) 2018-11-13 2021-12-28 Topcon Positioning Systems, Inc. Compact integrated GNSS-UHF antenna system
EP3726650A1 (fr) * 2019-04-19 2020-10-21 Bose Corporation Antenne spirale à bras multiples pour dispositif sans fil
US10944157B2 (en) 2019-04-19 2021-03-09 Bose Corporation Multi-arm spiral antenna for a wireless device
US11525703B2 (en) 2020-03-02 2022-12-13 Bose Corporation Integrated capacitor and antenna

Also Published As

Publication number Publication date
EP1833116B1 (fr) 2013-07-17
EP1833116A3 (fr) 2011-12-28

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