DE69201556T2 - ANTENNA CONSTRUCTION WITH A EXTENDABLE ANTENNA ELEMENT. - Google Patents

ANTENNA CONSTRUCTION WITH A EXTENDABLE ANTENNA ELEMENT.

Info

Publication number
DE69201556T2
DE69201556T2 DE69201556T DE69201556T DE69201556T2 DE 69201556 T2 DE69201556 T2 DE 69201556T2 DE 69201556 T DE69201556 T DE 69201556T DE 69201556 T DE69201556 T DE 69201556T DE 69201556 T2 DE69201556 T2 DE 69201556T2
Authority
DE
Germany
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.)
Expired - Lifetime
Application number
DE69201556T
Other languages
German (de)
Other versions
DE69201556D1 (en
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 TELECOM AS
Original Assignee
DANCALL TELECOM 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 TELECOM AS filed Critical DANCALL TELECOM AS
Application granted granted Critical
Publication of DE69201556D1 publication Critical patent/DE69201556D1/en
Publication of DE69201556T2 publication Critical patent/DE69201556T2/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
    • 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.
DE69201556T 1991-03-19 1992-03-18 ANTENNA CONSTRUCTION WITH A EXTENDABLE ANTENNA ELEMENT. Expired - Lifetime DE69201556T2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK049191A DK168346B1 (en) 1991-03-19 1991-03-19 Antenna construction with extendable antenna element
PCT/DK1992/000086 WO1992016980A1 (en) 1991-03-19 1992-03-18 An antenna construction with an extensible antenna element

Publications (2)

Publication Number Publication Date
DE69201556D1 DE69201556D1 (en) 1995-04-06
DE69201556T2 true DE69201556T2 (en) 1995-06-29

Family

ID=8094162

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69201556T Expired - Lifetime DE69201556T2 (en) 1991-03-19 1992-03-18 ANTENNA CONSTRUCTION WITH A EXTENDABLE 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
AU673037B2 (en) * 1993-02-25 1996-10-24 Anten 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
RU2152672C1 (en) * 1993-09-20 2000-07-10 Моторола Инк. Antenna assembly for radio 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
WO1992016980A1 (en) 1992-10-01
EP0576531A1 (en) 1994-01-05
DK49191D0 (en) 1991-03-19
DK168346B1 (en) 1994-03-14
AU1452992A (en) 1992-10-21
ATE119318T1 (en) 1995-03-15
DE69201556D1 (en) 1995-04-06
GR3015692T3 (en) 1995-07-31
ES2071501T3 (en) 1995-06-16
DK49191A (en) 1992-09-20
EP0576531B1 (en) 1995-03-01

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition