EP0786824A1 - Antenne-cadre à dimension micro - Google Patents

Antenne-cadre à dimension micro Download PDF

Info

Publication number
EP0786824A1
EP0786824A1 EP96101153A EP96101153A EP0786824A1 EP 0786824 A1 EP0786824 A1 EP 0786824A1 EP 96101153 A EP96101153 A EP 96101153A EP 96101153 A EP96101153 A EP 96101153A EP 0786824 A1 EP0786824 A1 EP 0786824A1
Authority
EP
European Patent Office
Prior art keywords
microloop antenna
symmetrical
antenna
open loop
microloop
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Withdrawn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
EP96101153A
Other languages
German (de)
English (en)
Inventor
Akitoshi Imamura
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.)
Individual
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
Priority to EP96101153A priority Critical patent/EP0786824A1/fr
Priority to SG1996000508A priority patent/SG54109A1/en
Priority claimed from SG1996000508A external-priority patent/SG54109A1/en
Publication of EP0786824A1 publication Critical patent/EP0786824A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Definitions

  • the present invention relates to an antenna for a wireless communication system, and particularly to a microloop antenna for improving indoor radio communications.
  • An objective of the present invention is to provide a microloop antenna which is light in weight and capable of providing a high communication quality.
  • Another objective of the present invention is to provided a microloop antenna which is integrally formed with the communication apparatus.
  • a microloop antenna includes a pair of symmetrical open loop radiators placed in a symmetrical position each having an opening oppositely facing each other and a pair of parallel ends extending toward a middle portion thereof and a pair of symmetrical feedlines symmetrically connected between the open loop radiators.
  • Fig. 1 shows a plan view of one exemplary embodiment of a microloop antenna 100 according to this invention.
  • the microloop antenna 100 includes two U-shaped loop radiators 10 and two feedlines 30 connected between the loop radiators 10.
  • the U-shaped loop radiators 10 and the feedlines 30 are symmetrically positioned with respect to each of two mutually perpendicular axes X, Y intersecting at a middle point T of the microloop antenna 100.
  • Each of the U-shaped loop radiators 10 has an angled end 12 extending in a parallel relation toward the vertical axis Y (as shown) as to define a tuning capacitor.
  • a width W of the radiator 10 is about 1/8 ⁇ to 1/10 ⁇ and a distance D between two radiators 10 is at least 1/15 ⁇ , ⁇ is the wavelength at an anticipated operating frequency, such as when the operating frequency is 1.5 gigahertz, the width W will be 2.5 centimeters while the operating frequency is 1.9 gigahertz, the width will be 2.0 centimeters.
  • the feedlines 30 are in a square-step configuration, those skilled in the art will appreciate that the dimension of the feedlines 30 should be appropriately designed to match the impedance of the radiators.
  • the feedlines 30 and the radiators 10 having the above-described configuration can be formed from a unitary sheet of conductive material such as gold, silver, copper, or aluminum or by forming said conductive material film on a plastic sheet using thin film forming methods such as deposition, plating, and sputtering and by patterning the film using photolithography or the like.
  • the feedlines 30 and the radiators 10 may be formed by screen-printing a conductive material to provide the configuration as shown in Fig. 1.
  • the bottom side of the microloop antenna 100 is coated with an adhesive layer 40 then the coated microloop antenna 100 is placed over a release sheet 50 for a user to easily adhere the antenna onto a back of a mobile phone (not shown) by peeling away the release sheet.
  • the antenna 100 is deposited on a film 60 as previously mentioned, an adhesive layer 40 is coated on the bottom side of the film 60 then placed over a release sheet 50 as shown in Fig. 3 for a user to adhere the antenna 100 onto a back of the mobile phone by peeling away the release sheet 50.
  • the antenna 100 may directly plated on a back cover of a mobile phone if desired.

Landscapes

  • Details Of Aerials (AREA)
EP96101153A 1996-01-27 1996-01-27 Antenne-cadre à dimension micro Withdrawn EP0786824A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP96101153A EP0786824A1 (fr) 1996-01-27 1996-01-27 Antenne-cadre à dimension micro
SG1996000508A SG54109A1 (en) 1996-01-27 1996-01-27 A microloop antenna

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP96101153A EP0786824A1 (fr) 1996-01-27 1996-01-27 Antenne-cadre à dimension micro
SG1996000508A SG54109A1 (en) 1996-01-27 1996-01-27 A microloop antenna

Publications (1)

Publication Number Publication Date
EP0786824A1 true EP0786824A1 (fr) 1997-07-30

Family

ID=26141718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101153A Withdrawn EP0786824A1 (fr) 1996-01-27 1996-01-27 Antenne-cadre à dimension micro

Country Status (1)

Country Link
EP (1) EP0786824A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903805A2 (fr) * 1997-09-19 1999-03-24 Peter Vernon Antenne plane et procédé de fabrication de conducteurs sur un substrat
EP1542312A2 (fr) * 2003-12-10 2005-06-15 Asahi Glass Company, Limited Antenne plane
EP1555714A1 (fr) * 2004-01-13 2005-07-20 Kabushiki Kaisha Toshiba Antenne boucle et appareil de communication radio l'utilisant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0060628A1 (fr) * 1981-02-27 1982-09-22 Kabushiki Kaisha Toshiba Petite antenne-cadre accordable
US4547776A (en) * 1983-11-03 1985-10-15 The United States Of America As Represented By The Secretary Of The Navy Loop antenna with improved balanced feed
GB2246023A (en) * 1990-05-08 1992-01-15 Nippon Sheet Glass Co Ltd Double loop antenna with a reactance element in each loop
US5451965A (en) * 1992-07-28 1995-09-19 Mitsubishi Denki Kabushiki Kaisha Flexible antenna for a personal communications device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0060628A1 (fr) * 1981-02-27 1982-09-22 Kabushiki Kaisha Toshiba Petite antenne-cadre accordable
US4547776A (en) * 1983-11-03 1985-10-15 The United States Of America As Represented By The Secretary Of The Navy Loop antenna with improved balanced feed
GB2246023A (en) * 1990-05-08 1992-01-15 Nippon Sheet Glass Co Ltd Double loop antenna with a reactance element in each loop
US5451965A (en) * 1992-07-28 1995-09-19 Mitsubishi Denki Kabushiki Kaisha Flexible antenna for a personal communications device

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FENN: "Arrays of Horizontally Polarized Loop-Fed Slotted Cylinder Antennas", IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, vol. 33, no. 4, April 1985 (1985-04-01), NEW YORK US, pages 375 - 382, XP002007128 *
KUMON ET AL.: "An Analysis of the Crossed Twin Delta Loop Antennas with Circular Polarization", ELECTRONICS AND COMMUNICATIONS IN JAPAN, PART I: COMMUNICATIONS, vol. 74, no. 2, February 1991 (1991-02-01), NEW YORK US, pages 108 - 115, XP000241430 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903805A2 (fr) * 1997-09-19 1999-03-24 Peter Vernon Antenne plane et procédé de fabrication de conducteurs sur un substrat
EP0903805A3 (fr) * 1997-09-19 1999-06-09 Peter Vernon Antenne plane et procédé de fabrication de conducteurs sur un substrat
EP1542312A2 (fr) * 2003-12-10 2005-06-15 Asahi Glass Company, Limited Antenne plane
EP1542312A3 (fr) * 2003-12-10 2005-08-10 Asahi Glass Company, Limited Antenne plane
US7289075B2 (en) 2003-12-10 2007-10-30 Asahi Glass Company, Limited Planar antenna
EP1555714A1 (fr) * 2004-01-13 2005-07-20 Kabushiki Kaisha Toshiba Antenne boucle et appareil de communication radio l'utilisant
US7113143B2 (en) 2004-01-13 2006-09-26 Kabushiki Kaisha Toshiba Loop antenna and radio communication device having the same

Similar Documents

Publication Publication Date Title
AU750257B2 (en) Multiple frequency band antenna
FI117580B (fi) Yksitasoinen kaksoisliuska-antenni
US5945954A (en) Antenna assembly for telecommunication devices
EP0911906A3 (fr) Structure d'antenne plane transparente
US6054961A (en) Dual band, glass mount antenna and flexible housing therefor
KR100612798B1 (ko) 이동 단말기용 소형 인쇄된 나선형 안테나
KR101006296B1 (ko) 광대역 평면 역ｆ형 안테나
EP1649542B1 (fr) Antennes comprenant des canaux de guidage acoustique et terminaux sans fil comprenant ces dernieres
CN100466377C (zh) 多频带平面天线
EP1367671B1 (fr) Antenne multibande du type en méandres
WO1999067851A1 (fr) Dispositif d'antenne, procede de fabrication associe et dispositif de radiocommunication comportant un dispositif d'antenne
JPH10173423A (ja) 移動電話器用アンテナ素子
WO1999013528A1 (fr) Ensemble d'antenne a cadre pour dispositifs de telecommunications
CA2200675A1 (fr) Structure d'antenne a circuits imprimes utilisee pour la transmission de donnees sans fil
KR20030007569A (ko) 기생 안테나 소자 및 이를 탑재한 무선 통신 장치
CN105071028B (zh) 无外加滤波电路的滤波贴片天线及其调节方法
KR20110086019A (ko) 광대역 안테나
CA2047694A1 (fr) Antenne helicoidale a 4 fils
US20050062673A1 (en) Method and apparatus for improving antenna radiation patterns
NO323300B1 (no) Apparat for tradlos kommunikasjon, omfattende et parasittelement for hoyfrekvensmessig kopling
EP0786824A1 (fr) Antenne-cadre à dimension micro
EP0938158A3 (fr) Antenne
EP1686511A3 (fr) Largeur de bande passante, transpondeur d'impédance d'identification du système électronique élevée
EP1162687A3 (fr) Elément d'antenne, agencement d'antenne adaptatif et appareil de radiocommunications
CA2168326A1 (fr) Antenne a microruban

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE DK ES FR GB IT NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19980131