EP0977303A3 - Antenna for radio telephone - Google Patents

Antenna for radio telephone Download PDF

Info

Publication number
EP0977303A3
EP0977303A3 EP99114696A EP99114696A EP0977303A3 EP 0977303 A3 EP0977303 A3 EP 0977303A3 EP 99114696 A EP99114696 A EP 99114696A EP 99114696 A EP99114696 A EP 99114696A EP 0977303 A3 EP0977303 A3 EP 0977303A3
Authority
EP
European Patent Office
Prior art keywords
rod
antenna
shaped antenna
case
length
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Withdrawn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
EP99114696A
Other languages
German (de)
French (fr)
Other versions
EP0977303A2 (en
Inventor
Yoshimi c/o Houkou Electric Corporation Egashira
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.)
Houkou Electric Corp
Original Assignee
Houkou Electric Corp
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 Houkou Electric Corp filed Critical Houkou Electric Corp
Publication of EP0977303A2 publication Critical patent/EP0977303A2/en
Publication of EP0977303A3 publication Critical patent/EP0977303A3/en
Withdrawn legal-status Critical Current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
    • H01Q1/084—Pivotable antennas

Landscapes

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

Abstract

Provides an antenna for a radio telephone whereby, in a state wherein a rod-shaped antenna (10) is extended to outside the case (50) of the radio telephone, the effects of the human body are negligible and emission of radio waves at an angle close to the horizontal direction is possible, and in a state wherein the rod-shaped antenna (10) is retracted within the case (50), no unwanted radiation is produced. For this purpose, a helical antenna (20) having an electrical length of λ/4 and the rod-shaped antenna (10) extendable and retractable with respect to the case (50) through the hollow central portion of the helical antenna (20) and having an electrical length of about 3λ/8 and inductive reactance, are electrically coupled by means of an electrostatic coupling portion (30) having capacitive reactance such that, in the state wherein the rod-shaped antenna (10) is extended from the case (50), the inductive reactance of the rod-shaped antenna (10) is canceled out. The length of the bottom portion (12a) of the connecting member (12) is preferably set to a length such that when the rod-shaped antenna (10) is retracted within the case (50), the bottom portion (12a) of the connecting member (12) passes through the helical coil (20) over the entire length thereof, severing electrical coupling between the helical antenna (20) and the rod-shaped antenna (10).
EP99114696A 1998-07-27 1999-07-27 Antenna for radio telephone Withdrawn EP0977303A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP21153498 1998-07-27
JP21153498 1998-07-27
JP19290699 1999-07-07
JP11192906A JP2000106502A (en) 1998-07-27 1999-07-07 Antenna for radio equipment

Publications (2)

Publication Number Publication Date
EP0977303A2 EP0977303A2 (en) 2000-02-02
EP0977303A3 true EP0977303A3 (en) 2003-04-09

Family

ID=26507590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99114696A Withdrawn EP0977303A3 (en) 1998-07-27 1999-07-27 Antenna for radio telephone

Country Status (3)

Country Link
EP (1) EP0977303A3 (en)
JP (1) JP2000106502A (en)
CN (1) CN1205695C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105958177A (en) * 2016-04-29 2016-09-21 深圳市联合东创科技有限公司 Wireless user terminal protective device
CN105958176A (en) * 2016-04-29 2016-09-21 深圳市联合东创科技有限公司 Wireless user terminal protective device
CN105958181A (en) * 2016-04-29 2016-09-21 深圳市联合东创科技有限公司 Coupled antenna and wireless user terminal
CN111106424A (en) * 2019-12-06 2020-05-05 国网江苏省电力有限公司检修分公司 Adjustable spiral ground penetrating radar antenna

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0367609A2 (en) * 1988-11-02 1990-05-09 Motorola, Inc. Improved extendable antenna for portable cellular telephones
JPH0823216A (en) * 1994-07-08 1996-01-23 Harada Ind Co Ltd Antenna device for mobile object communication
JPH0875222A (en) * 1994-08-31 1996-03-19 Matsushita Seiko Co Ltd Controller for underfloor air-conditioning system
US5952974A (en) * 1996-03-05 1999-09-14 Sony Corporation Antenna assembly and portable radio apparatus

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121218A (en) * 1977-08-03 1978-10-17 Motorola, Inc. Adjustable antenna arrangement for a portable radio
EP0415703B1 (en) * 1989-08-29 1995-01-04 Nec Corporation Antenna system for portable radio apparatus
JP3261628B2 (en) * 1992-07-29 2002-03-04 京セラ株式会社 antenna
JP3300818B2 (en) * 1992-10-27 2002-07-08 三省電機株式会社 Antenna support / connection method and support / connection structure
JPH06216630A (en) * 1993-01-14 1994-08-05 Nippon Antenna Kk Expansion whip antenna
JPH06252619A (en) * 1993-02-24 1994-09-09 Sansei Denki Kk Antenna support and connecting method and antenna support and connection structure
GB2285180B (en) * 1993-12-22 1998-07-01 Nokia Mobile Phones Ltd Retractable antenna
JPH07288413A (en) * 1994-04-19 1995-10-31 Harada Ind Co Ltd Antenna system for radio communication
JP3595856B2 (en) * 1994-10-17 2004-12-02 三省電機株式会社 Method for connecting antenna for mobile communication device and connection structure
JPH08298405A (en) * 1995-04-27 1996-11-12 Mitsubishi Electric Corp Portable radio equipment antenna
JP3012170B2 (en) * 1995-05-09 2000-02-21 ユピテル工業株式会社 Pull-out antenna device
JPH098525A (en) * 1995-06-15 1997-01-10 Smk Corp Antenna system
JPH0918219A (en) * 1995-06-29 1997-01-17 Sansei Denki Kk Antenna attachment method and its structure
JP3447453B2 (en) * 1995-12-20 2003-09-16 京セラ株式会社 Retractable antenna
JPH10150310A (en) * 1996-11-20 1998-06-02 Sansei Denki Kk Antenna support, connection method and antenna support connection structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0367609A2 (en) * 1988-11-02 1990-05-09 Motorola, Inc. Improved extendable antenna for portable cellular telephones
JPH0823216A (en) * 1994-07-08 1996-01-23 Harada Ind Co Ltd Antenna device for mobile object communication
JPH0875222A (en) * 1994-08-31 1996-03-19 Matsushita Seiko Co Ltd Controller for underfloor air-conditioning system
US5952974A (en) * 1996-03-05 1999-09-14 Sony Corporation Antenna assembly and portable radio apparatus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 05 31 May 1996 (1996-05-31) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 07 31 July 1996 (1996-07-31) *

Also Published As

Publication number Publication date
CN1250237A (en) 2000-04-12
CN1205695C (en) 2005-06-08
EP0977303A2 (en) 2000-02-02
JP2000106502A (en) 2000-04-11

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