CA2198375A1 - An antenna - Google Patents

An antenna

Info

Publication number
CA2198375A1
CA2198375A1 CA002198375A CA2198375A CA2198375A1 CA 2198375 A1 CA2198375 A1 CA 2198375A1 CA 002198375 A CA002198375 A CA 002198375A CA 2198375 A CA2198375 A CA 2198375A CA 2198375 A1 CA2198375 A1 CA 2198375A1
Authority
CA
Canada
Prior art keywords
core
antenna
elements
plated
distal end
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
CA002198375A
Other languages
French (fr)
Other versions
CA2198375C (en
Inventor
Oliver Paul Leisten
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.)
Sarantel Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2198375A1 publication Critical patent/CA2198375A1/en
Application granted granted Critical
Publication of CA2198375C publication Critical patent/CA2198375C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • 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
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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

Abstract

An antenna for use at UHF and upwards has a cylindrical ceramic core (12) with a relative dielectric constant of at least 5. A three-dimensienal radiating element structure, consisting of helical antenna elements (10A - 10D) on the cylindrical surface of the core (12) and connecting radial elements (10AR - 10AD) on a distal end face (12D) of the core, is formed by conductor tracks plated directly on the core surfaces. At the distal end face the elements are connected to an axially located feed structure in a plated axial passage (14) of the core (12). The antenna elements are connected together by a plated sleeve (20) covering a proximal part of the core (12) which, in conjunction with the feeder structure, forms an integral balun for matching to an unbalanced feeder.
Since the ceramic core fills the major part of the interior volume defined by the radiating element structure, the antenna is very much smaller than an air-cored antenna. It is also mechanically robust and electrically stable.
CA002198375A 1994-08-25 1995-08-21 An antenna Expired - Fee Related CA2198375C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB9417450.5 1994-08-25
GB9417450A GB9417450D0 (en) 1994-08-25 1994-08-25 An antenna
GB9424150.2 1994-11-30
GB9424150A GB9424150D0 (en) 1994-08-25 1994-11-30 An antenna
PCT/GB1995/001982 WO1996006468A1 (en) 1994-08-25 1995-08-21 An antenna

Publications (2)

Publication Number Publication Date
CA2198375A1 true CA2198375A1 (en) 1996-02-29
CA2198375C CA2198375C (en) 2004-11-16

Family

ID=10760577

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002198375A Expired - Fee Related CA2198375C (en) 1994-08-25 1995-08-21 An antenna

Country Status (18)

Country Link
US (3) US5854608A (en)
EP (3) EP1081787B1 (en)
JP (3) JP4188412B2 (en)
KR (1) KR100366071B1 (en)
CN (1) CN1090829C (en)
AT (2) ATE201284T1 (en)
AU (1) AU707488B2 (en)
BR (1) BR9508769A (en)
CA (1) CA2198375C (en)
DE (3) DE69535431T2 (en)
DK (1) DK0777922T3 (en)
ES (1) ES2158123T3 (en)
FI (2) FI121038B (en)
GB (3) GB9417450D0 (en)
NO (1) NO970832L (en)
NZ (1) NZ291852A (en)
PL (1) PL180221B1 (en)
WO (1) WO1996006468A1 (en)

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