AU1452992A - An antenna construction with an extensible antenna element - Google Patents

An antenna construction with an extensible antenna element

Info

Publication number
AU1452992A
AU1452992A AU14529/92A AU1452992A AU1452992A AU 1452992 A AU1452992 A AU 1452992A AU 14529/92 A AU14529/92 A AU 14529/92A AU 1452992 A AU1452992 A AU 1452992A AU 1452992 A AU1452992 A AU 1452992A
Authority
AU
Australia
Prior art keywords
transmission line
antenna element
tube
rod
shaped antenna
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.)
Abandoned
Application number
AU14529/92A
Inventor
Erik Bech
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.)
DANCALL RADIO AS
Original Assignee
DANCALL RADIO AS
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 DANCALL RADIO AS filed Critical DANCALL RADIO AS
Publication of AU1452992A publication Critical patent/AU1452992A/en
Abandoned 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
    • H01Q1/12—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
    • H01Q1/243—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 with built-in antennas
    • H01Q1/244—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 with built-in antennas extendable from a housing along a given path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H01Q1/10—Telescopic elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

An antenna construction with a rod-shaped antenna element is adapted for use preferably in portable telephones. The rod-shaped antenna element is adapted to be slidably moveable in a tube between a first position in which substantially the entire rod-shaped antenna element protrudes from the tube and contributes to radiation, and a second position where just part of the rod-shaped antenna element protrudes from the tube and contributes to radiation. The rod-shaped antenna element is adapted to be received in the tube to provide a coaxial transmission line. The coaxial transmission line is adapted such that in the second position where part of the antenna element is received in the tube, it has a length and is terminated in a manner such that the impedance of the transmission line is high seen from the protruding part of the antenna element and thus does not affect this part. The coaxial transmission line may e.g. be an open half-wave transmission line. However, the transmission line may also be realized in the form of a short circuited quarter-wave transmission line or an open, shortened half-wave transmission line.
AU14529/92A 1991-03-19 1992-03-18 An antenna construction with an extensible antenna element Abandoned AU1452992A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK491/91 1991-03-19
DK049191A DK168346B1 (en) 1991-03-19 1991-03-19 Antenna construction with extendable antenna element

Publications (1)

Publication Number Publication Date
AU1452992A true AU1452992A (en) 1992-10-21

Family

ID=8094162

Family Applications (1)

Application Number Title Priority Date Filing Date
AU14529/92A Abandoned AU1452992A (en) 1991-03-19 1992-03-18 An antenna construction with an extensible antenna element

Country Status (8)

Country Link
EP (1) EP0576531B1 (en)
AT (1) ATE119318T1 (en)
AU (1) AU1452992A (en)
DE (1) DE69201556T2 (en)
DK (1) DK168346B1 (en)
ES (1) ES2071501T3 (en)
GR (1) GR3015692T3 (en)
WO (1) WO1992016980A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257835B (en) * 1991-07-13 1995-10-11 Technophone Ltd Retractable antenna
JP2809365B2 (en) * 1992-09-28 1998-10-08 エヌ・ティ・ティ移動通信網株式会社 Portable radio
US5467096A (en) * 1993-02-25 1995-11-14 Nec Corporation Antenna for a radio communication apparatus
JP2520557B2 (en) * 1993-02-26 1996-07-31 日本電気株式会社 Radio antenna
ES2112200B1 (en) * 1993-09-20 1999-02-16 Motorola Inc ANTENNA DEVICE FOR A WIRELESS COMMUNICATION DEVICE.
DE69428757T2 (en) * 1993-09-23 2002-08-01 At & T Corp Automatic telescopic antenna mechanism
IL110008A (en) * 1994-06-13 1998-04-05 Galtronics Ltd Electrical antenna assembly and electrical device including same
US6008765A (en) * 1994-12-23 1999-12-28 Nokia Mobile Phones Limited Retractable top load antenna
GB2296603B (en) * 1994-12-23 1999-02-17 Nokia Mobile Phones Ltd Retractable top load antenna
FI97499C (en) * 1995-04-07 1996-12-27 Nokia Mobile Phones Ltd Double acting antenna
FI99219C (en) * 1995-06-06 1997-10-27 Nokia Mobile Phones Ltd Antenna that works in two frequency bands
US5812093A (en) * 1995-09-29 1998-09-22 Motorola, Inc. Antenna assembly for a wireless-communication device
SE507244C2 (en) * 1996-08-29 1998-04-27 Ericsson Telefon Ab L M Antenna device and method of portable radio equipment and method of providing such an antenna device
SE518575C2 (en) * 1997-03-24 2002-10-22 Ericsson Telefon Ab L M Sliding antenna with alternating electrical length
SE9802772D0 (en) * 1998-08-19 1998-08-19 Allgon Ab Antenna device comprising sliding connector means
JP3347093B2 (en) 1999-06-10 2002-11-20 埼玉日本電気株式会社 Portable wireless device and terminal matching switching method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725845A (en) * 1986-03-03 1988-02-16 Motorola, Inc. Retractable helical antenna
JPS63173934U (en) * 1987-04-30 1988-11-11
JP2756672B2 (en) * 1987-12-25 1998-05-25 日本アンテナ株式会社 Multi-frequency antenna
JPH01105237U (en) * 1987-12-28 1989-07-14
US4847629A (en) * 1988-08-03 1989-07-11 Alliance Research Corporation Retractable cellular antenna

Also Published As

Publication number Publication date
GR3015692T3 (en) 1995-07-31
DK49191A (en) 1992-09-20
ES2071501T3 (en) 1995-06-16
EP0576531B1 (en) 1995-03-01
DK49191D0 (en) 1991-03-19
DE69201556D1 (en) 1995-04-06
ATE119318T1 (en) 1995-03-15
EP0576531A1 (en) 1994-01-05
WO1992016980A1 (en) 1992-10-01
DE69201556T2 (en) 1995-06-29
DK168346B1 (en) 1994-03-14

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