EP0986131A2 - Petite antenne extensible pour terminals mobiles - Google Patents

Petite antenne extensible pour terminals mobiles Download PDF

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Publication number
EP0986131A2
EP0986131A2 EP99118205A EP99118205A EP0986131A2 EP 0986131 A2 EP0986131 A2 EP 0986131A2 EP 99118205 A EP99118205 A EP 99118205A EP 99118205 A EP99118205 A EP 99118205A EP 0986131 A2 EP0986131 A2 EP 0986131A2
Authority
EP
European Patent Office
Prior art keywords
antenna
metal pipe
whip
housing
core wire
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.)
Withdrawn
Application number
EP99118205A
Other languages
German (de)
English (en)
Other versions
EP0986131A3 (fr
Inventor
Dong-In Ha
Seong-Joong Kim
Dong-Hwan Kim
Konstantine Stanislavovich Krylov
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP0986131A2 publication Critical patent/EP0986131A2/fr
Publication of EP0986131A3 publication Critical patent/EP0986131A3/fr
Withdrawn legal-status Critical Current

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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
    • H01Q1/12—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

Definitions

  • the present invention relates to an antenna for a portable terminal and to a corresponding terminal, and in particular, to an antenna which is extendible.
  • a whip antenna and a helical antenna are typically used for a portable terminal like a cellular phone or a PCS (Personal Communication Service) phone.
  • Such antennas are designed to be a ⁇ /4- or ⁇ /3-operating frequency in length.
  • ⁇ /4 is about 90mm and 40mm, respectively in the cellular system and PCS system currently in general use. If a ⁇ /4-length antenna always protrudes externally, it will incur an inconvenience in carrying a portable terminal. The short physical length of the helical antenna can relieve the inconvenience, but results in poor efficiency in comparison with the whip antenna.
  • the whip antenna is more popular than the helical antenna due to its better performance during talking.
  • a retractable antenna type with the advantages of the helical and whip antennas has been developed. A well-recognized example of this type can be found in U.S. Patent No. 5,479,178.
  • the retractable antenna in the above patent incorporates a helical antenna and a whip antenna.
  • the helical antenna In an idle state, the helical antenna is operated while the whip antenna is retracted into a terminal body. In an active state, the whip antenna is extended when necessary. If the terminal body is long enough to accommodate the whip antenna, the retractable antenna is effective.
  • the terminal body As a terminal body has shrunk due to the development of highly integrated circuits, the terminal body has a smaller space for accommodating the whip antenna.
  • the whip antenna should be decoupled from a feeding point in its retracted state, but an insufficient accommodation space cannot ensure the decoupling. This imposes constraints on designing the antenna.
  • the invention provides a whip antenna longer than a terminal body which is retractable in the terminal body in two stages.
  • an antenna housing installed on the body housing, a helical antenna installed inside the antenna housing, and an extendible rod antenna having a whip portion for acting as an effective antenna in an extended state, a conductive core wire installed inside the whip portion, and a metal pipe connected to a lower end of the conductive core wire.
  • the conductive core wire is extended from and retracted into the metal pipe.
  • a whip portion 210 of a small extendible antenna according to the present invention can be accommodated in a body housing 300 in two stages though the whip portion 210 is longer than a telephone body.
  • the telephone body can accommodate the whip portion 210 longer than the body in an idle state, the length of the body does not impose much constraint on designing the antenna despite the trend toward terminal miniaturization.
  • a helical antenna 10 protrudes outward from the body housing 300 to thereby contribute to miniaturization of a portable telephone.
  • a whip antenna 20 is extended, increasing the physical length of the whip antenna limited by the scale-down of a terminal.
  • the small extendible antenna of the present invention includes the helical antenna 10 acting as an effective antenna in a retracted state, the whip antenna 20 acting as an effective antenna in an extended state, a metal pipe 30 for reducing the length of the whip antenna 20 in the retracted state, a stopper 220 connected to an end of a conductive core wire 201 of the whip antenna 20, for supporting the extension of the conductive core line 201, a stopper 301 connected to an end of the metal pipe 30, for supporting the extension of the metallic pipe 30, and a metal fixture 40 which acts as a feeder for the helical antenna 10 and the whip antenna 20 and through which the whip antenna 20 slides down when it is retracted.
  • the metal fixture 40 is fixed to the body housing 300 by means of a fixing bushing 50.
  • reference character L1 denotes the length of the whip antenna 20 including an insulator 202 in the extended state
  • reference character L2 denotes the length of the insulator 202
  • reference character L3 denotes the conductor length of the whip portion 210 in the extended state
  • reference character L4 denotes the physical length of the helical antenna 10 including the fixture 40.
  • reference character L5 denotes the reduced length of the whip portion 210 when the whip antenna 20 is retracted into the body housing 300
  • reference character L6 denotes the conductor length of the whip portion 210 in the retracted state.
  • the helical antenna 10 is connected to the antenna fixture 40, protruding outward, and protected in an antenna housing 310.
  • the helical antenna 10 acts as an independent antenna in an idle state.
  • the whip antenna 20 is retracted in the body housing 300 in the idle state and extended from the body in an active state.
  • the extended whip antenna 20 acts as an effective antenna in the active state.
  • the increase in the length of the effective antenna can reduce the degradation of antenna characteristics during talking.
  • the conductive core wire 201 is completely inserted into the body housing 300 and the insulator 202 at the top portion of the whip antenna 20 is disposed in the antenna fixture 40, so that the whip antenna 20 is completely decoupled from the antenna fixture 40 and only the helical antenna 10 is operated.
  • the length of the whip portion 210 is longer than the telephone body. On this assumption, it is impossible to simply accommodate the whip portion 210 in the body housing 300.
  • the whip portion 210 is contracted while being retracted.
  • the end of the whip portion 210 that is, the metal pipe 30 reaches the bottom of the body housing 300 and the conductive core wire 201 is pushed into the metal pipe 30.
  • the stopper 220 is inserted into the metal pipe 30 until it reaches the bottom of the body housing 300.
  • This mechanism can be varied according to applications of the metal pipe 30.
  • the metal pipe 30 may be a metal tube around which an elastic spring is densely wound, or an elastic metal pipe.
  • the extension of the antenna involves the extension of the antenna from the terminal body and the increase in the antenna length.
  • the conductive core wire 201 of the whip antenna 20 is extended outward from the metal pipe 30, while it is connected to the metal pipe 30 by the stopper 220. Though the whip antenna 20 protrudes from the body housing 300, the whip antenna 20 as well as the helical antenna 10 remains connected to the antenna fixture 40.
  • the helical antenna 10 is physically shorter than the whip antenna 20 and a helical winding 11 is in close contact with the whip antenna 20, only the whip antenna 20 is operated in electrical terms.
  • the extension of the whip antenna 20 is supported by the stopper 301 of the metal pipe 30.
  • the small extendible antenna according to the present invention is suitable for miniaturization of a terminal body because the whip portion of the antenna longer than the terminal body can be retracted into the body housing in two stages. Therefore, the length of the terminal body does not much constraint on designing the antenna. In an idle state, only the helical antenna protrudes outward, contributing to miniaturization of a portable telephone, and in an active state, the whip antenna which was retracted in two stages can be extended for use, thereby increasing the physical length of the whip antenna limited in a typical portable terminal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)
EP99118205A 1998-09-11 1999-09-13 Petite antenne extensible pour terminals mobiles Withdrawn EP0986131A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR9837517 1998-09-11
KR1019980037517A KR100299026B1 (ko) 1998-09-11 1998-09-11 신장가능한소형안테나

Publications (2)

Publication Number Publication Date
EP0986131A2 true EP0986131A2 (fr) 2000-03-15
EP0986131A3 EP0986131A3 (fr) 2000-04-05

Family

ID=19550303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99118205A Withdrawn EP0986131A3 (fr) 1998-09-11 1999-09-13 Petite antenne extensible pour terminals mobiles

Country Status (4)

Country Link
EP (1) EP0986131A3 (fr)
JP (1) JP2000101317A (fr)
KR (1) KR100299026B1 (fr)
CN (1) CN1251948A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2380612A (en) * 2001-08-28 2003-04-09 Nec Corp Helical antenna cap for a mobile telephone which reduces degradation in antenna gain
AU767907B2 (en) * 2001-03-24 2003-11-27 Samsung Electronics Co., Ltd. Retractable/extendable antenna unit having a conductive tube in a portable radiophone

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100496157B1 (ko) * 2002-11-14 2005-06-20 주식회사 팬택앤큐리텔 이동 단말기의 안테나 장치
KR100634980B1 (ko) * 2002-11-29 2006-10-17 장응순 텔레비젼폰용 안테나
KR100827083B1 (ko) * 2002-12-27 2008-05-02 삼성전자주식회사 출몰식 로드 안테나 및 이를 채용한 휴대용 단말기의인입/인출 안테나 장치
CN102044740B (zh) * 2010-09-17 2014-05-28 中兴通讯股份有限公司 天线装置及移动终端
CN102005632A (zh) * 2010-09-19 2011-04-06 中兴通讯股份有限公司 无线通信终端及其天线

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2731188B2 (ja) * 1988-11-08 1998-03-25 株式会社東芝 伸縮アンテナ及び無線機
JPH05235628A (ja) * 1992-02-24 1993-09-10 Fujitsu Ltd ホイップアンテナ
JP2503856B2 (ja) * 1993-01-29 1996-06-05 日本電気株式会社 携帯無線機用アンテナ
KR960030478A (ko) * 1995-01-27 1996-08-17 김광호 무선기기의 안테나
FI113214B (fi) * 1997-01-24 2004-03-15 Filtronic Lk Oy Yksinkertainen kahden taajuuden antenni

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU767907B2 (en) * 2001-03-24 2003-11-27 Samsung Electronics Co., Ltd. Retractable/extendable antenna unit having a conductive tube in a portable radiophone
US6756943B2 (en) 2001-03-24 2004-06-29 Samsung Electronics Co., Ltd. Retractable/extendable antenna unit having a conductive tube in a portable radiophone
GB2380612A (en) * 2001-08-28 2003-04-09 Nec Corp Helical antenna cap for a mobile telephone which reduces degradation in antenna gain
GB2380612B (en) * 2001-08-28 2005-07-06 Nec Corp Antenna structure of mobile communication device
US6927744B2 (en) 2001-08-28 2005-08-09 Nec Corporation Antenna structure of mobile communication device and mobile communication device having the same antenna structure

Also Published As

Publication number Publication date
KR100299026B1 (ko) 2001-09-22
CN1251948A (zh) 2000-05-03
JP2000101317A (ja) 2000-04-07
KR20000019425A (ko) 2000-04-06
EP0986131A3 (fr) 2000-04-05

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Inventor name: KRYLOV, KONSTANTINE STANISLAVOVICH

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