EP1717902A1 - Antennes monopoles planaires - Google Patents

Antennes monopoles planaires Download PDF

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Publication number
EP1717902A1
EP1717902A1 EP06007137A EP06007137A EP1717902A1 EP 1717902 A1 EP1717902 A1 EP 1717902A1 EP 06007137 A EP06007137 A EP 06007137A EP 06007137 A EP06007137 A EP 06007137A EP 1717902 A1 EP1717902 A1 EP 1717902A1
Authority
EP
European Patent Office
Prior art keywords
ground
radiator
sleeve
monopole antenna
planar monopole
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.)
Granted
Application number
EP06007137A
Other languages
German (de)
English (en)
Other versions
EP1717902B1 (fr
Inventor
Chih-Lung Chen
Chih-Kai Liu
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.)
Wistron Neweb Corp
Original Assignee
Wistron Neweb 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 Wistron Neweb Corp filed Critical Wistron Neweb Corp
Publication of EP1717902A1 publication Critical patent/EP1717902A1/fr
Application granted granted Critical
Publication of EP1717902B1 publication Critical patent/EP1717902B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/40—Element having extended radiating surface
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of element
    • H01Q9/36—Vertical arrangement of element with top loading

Definitions

  • the invention relates in general to planar monopole antennas and in particular to planar monopole antennas with sleeve structures.
  • Embedded antennas such as chip antennas and planar antennas, are widely applied in wireless communication devices.
  • a conventional type is a ceramic chip antenna produced by LTCC (Low Temperature Co-fired Ceramic) technology.
  • Conventional planar antennas such as microstrip antennas, printed antennas and Planar Inverted F Antennas (PIFAs), are generally applied in GSM, DCS, UMTS, WLAN, and bluetooth wireless equipment such as mobile phones and wireless LAN adapters.
  • a conventional planar monopole antenna primarily comprises a substrate S, a ground G, a radiator R and a cable W.
  • the ground G and the radiator R are formed on a surface S1 of the substrate S, and the radiator R is longitudinal along axis Y.
  • the cable W such as a coaxial cable, comprising a signal wire W1 and a ground wire W2 enclosing the signal wire W1.
  • the radiator R comprises a feed end RF adjacent to the ground G.
  • the feed end RF is connected to the signal wire W1
  • the ground G is connected to the ground wire W2, respectively.
  • the frequency coverage ratio of a conventional planar monopole antenna as shown in Fig. 1 is usually less than 30%, adversely affecting communication efficiency.
  • the present invention provides a planar monopole antenna for communicating radio signals within a specific frequency range.
  • An exemplary embodiment of a planar monopole antenna includes a substrate, a ground, a first sleeve, a second sleeve and a radiator.
  • the radiator and the ground are formed on the substrate.
  • the first and second sleeves project from a side of the ground in a first direction, wherein the first sleeve has a first length, and the second sleeve has a second length in the first direction.
  • the side of the ground defines a third length from the first sleeve to the second sleeve.
  • the radiator has a fourth length in the first direction, substantially equal to the sum of the first, second, and third lengths.
  • the present invention further provides a planar monopole antenna including a substrate, a ground, a first sleeve, a second sleeve, a radiator and a cable connecting the radiator for communicating radio signals within a specific frequency range.
  • the first sleeve is formed on the substrate and electrically connected to the ground, wherein the first sleeve projects from a side of the ground in a first direction with a first length.
  • the second sleeve is formed on the substrate and electrically connected to the ground, wherein the second sleeve projects from the side of the ground in the first direction with a second length, and the side of the ground defines a third length.
  • the longitudinal radiator is formed on the substrate and situated between the first and second sleeves, wherein the radiator comprises a main body and two L-shaped angle portions symmetrical with respect to the main body. Specifically, the angle portions are substantially extend opposite to the first direction, wherein total length of the main body and each of the angle portions is substantially equal to the sum of the first, second, and third lengths.
  • an exemplary embodiment of a planar monopole antenna for transmitting radio signals within a specific frequency range includes a substrate S, a ground G, a first sleeve G1, a second sleeve G2, a radiator R and a cable W.
  • the ground G and the radiator R are formed on a surface S1 of the substrate S.
  • the radiator R is longitudinal along axis Y, comprising a feed end RF at the bottom thereof, adjacent to a side G' of the ground G.
  • the cable W such as a coaxial cable, comprises a signal wire W1 and a ground wire W2 enclosing the signal wire W1.
  • the radiator R comprises a feed end RF adjacent to the ground G.
  • the feed end RF is connected to the signal wire W1, and the ground G is connected to the ground wire W2, respectively.
  • the first and second sleeves G1 and G2 are parallel, formed on the surface S1, extending from the ends of the side G'.
  • the first sleeve G1 has a first length L1
  • the second sleeve G2 has a second length L2 along Y axis, respectively.
  • the first length L1 is substantially equal to the second length L2.
  • the substrate S is FR4 (Flame Retardant Type 4)
  • the ground G, the first and second sleeves G1 and G2 are metal, integrally formed on the surface S1 by PCB fabrication.
  • the side G' is perpendicular to Y axis, defining a third length L3 equal to the distance from the first sleeve G1 to the second sleeve G2.
  • the radiator R has a fourth length L4 along Y axis, and the distance d from the radiator R to the first sleeve G1 is substantially equal to the distance d from the radiator R to the second sleeve G2.
  • the fourth length L4 is designed substantially equal to 1/4 of the radio signal wavelength.
  • Fig. 3 illustrates Voltage Standing Wave Ratio (VSWR) between 400-900MHz of two planar monopole antennas.
  • Dashed line 31 indicates VSWR between 400-900MHz of a conventional planar monopole antenna
  • a standard antenna requires an available VSWR less than 3.
  • the frequency coverage ratio of the conventional planar monopole is about 25% (the proportion of the frequency range under VSWR ⁇ 3 indicated by dashed line 31 within 400-900MHz), and the frequency coverage ratio of the planar monopole antenna in Fig. 2 is about 90% (the proportion of the frequency range under VSWR ⁇ 3 by solid line 32 within 400-900MHz). That is, the planar monopole antenna of the embodiment can provide higher frequency coverage ratio and broader communication bandwidth than the conventional planar monopole antenna.
  • the radiator R' has a main body R1 and a pair of L-shaped angle portions R2 and R3, both symmetrical with respect to the main body R1. Specifically, total length of the main body R1 and each of the angle portions R2 and R3 is substantially equal to the sum of the first, second and third lengths L1, L2 and L3, and substantially equal to 1/4 of the radio signal wavelength.
  • the radiator R', the first and second sleeves G1 and G2 can provide capacitive effect and facilitate broader bandwidth for wireless communication.
  • the main body R1 extends along Y axis, and the angle portions R2 and R3 symmetrically extend outward from an end of the main body R1. Specifically, the angle portions R2 and R3 extend opposite to Y axis.
  • the radiator R' can have a length L4', extending less in direction Y, reducing antenna dimension. The length L4' in direction Y in Fig. 4 is less than the length L4 shown in Fig. 2.
  • an embodiment of a planar monopole antenna comprises a pair of angle portions R2 and R3 with zigzag structures, to reduce the extent of the radiator R' in direction Y.
  • Total length of the main body R1 and each of the angle portions R2 and R3 is substantially equal to the sum of the first, second and third lengths L1, L2 and L3, and substantially equal to 1/4 of the radio signal wavelength.
  • the radiator R', the first and second sleeves G1 and G2 can provide capacitive effect and facilitate broader bandwidth for wireless communication.
  • the extent of the radiator R' in direction Y can be reduced to facilitate miniaturization, wherein L4'' ⁇ L4' ⁇ L4.
  • Planar monopole antennas with symmetric sleeve structures are provided according to the embodiments.
  • the sleeves can be printed on a substrate by PCB fabrication, exhibiting capacitive effect with the radiator, thereby facilitating broader bandwidth for wireless communication.
  • the extent of the radiator can be reduced in various structures to facilitate miniaturization.
  • the invention can provide broader bandwidth than conventional planar monopole antennas for wireless communication, suited for various types of DVB devices, such as digital TVs.

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  • Details Of Aerials (AREA)
EP20060007137 2005-04-20 2006-04-04 Antennes monopoles planaires Expired - Lifetime EP1717902B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200510067238 CN1855625A (zh) 2005-04-20 2005-04-20 平面式单极天线

Publications (2)

Publication Number Publication Date
EP1717902A1 true EP1717902A1 (fr) 2006-11-02
EP1717902B1 EP1717902B1 (fr) 2009-03-04

Family

ID=36406024

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060007137 Expired - Lifetime EP1717902B1 (fr) 2005-04-20 2006-04-04 Antennes monopoles planaires

Country Status (3)

Country Link
EP (1) EP1717902B1 (fr)
CN (1) CN1855625A (fr)
DE (1) DE602006005413D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2928037A1 (fr) * 2008-02-21 2009-08-28 Composants Electr Soc D Antenne pour vehicule automobile, en particulier pour la reception de signaux radio terrestre et/ou satellites.
EP2683030A1 (fr) * 2012-07-04 2014-01-08 Arcadyan Technology Corp. Antenne monopole à large bande et dispositif électronique
EP2673840A4 (fr) * 2011-02-08 2014-11-26 Taoglas Group Holdings Antenne double bande complémentaire en double v, alignée en série, procédé de fabrication et kits correspondants
WO2015185267A1 (fr) * 2014-06-05 2015-12-10 Te Connectivity Germany Gmbh Agencement d'antenne avec unité d'antenne et unité de connecteur ainsi que procédé de production
WO2019066713A1 (fr) 2017-09-28 2019-04-04 Shortlink Resources Ab Antenne à large bande

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI462395B (zh) 2008-10-09 2014-11-21 Wistron Neweb Corp 攜帶式電子裝置及其內嵌式超寬頻天線
CN103545605B (zh) * 2012-07-12 2016-09-28 智易科技股份有限公司 宽频单极天线与电子装置
CN103887603B (zh) * 2014-03-26 2016-06-29 广州泽歌通信科技有限公司 一种小型化单极子天线

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998038694A1 (fr) * 1997-02-25 1998-09-03 Pates Technology Patentverwertungsgesellschaft Für Satelliten- Und Moderne Informationstechnologien Mbh Antenne accordee
US6392599B1 (en) * 1997-03-20 2002-05-21 David Ganeshmoorthy Communication antenna and equipment
US6559809B1 (en) * 2001-11-29 2003-05-06 Qualcomm Incorporated Planar antenna for wireless communications
EP1469554A1 (fr) * 2003-04-15 2004-10-20 Hewlett-Packard Development Company, L.P. Dispositif d'antenne monopôle à double entrée
WO2004102742A1 (fr) * 2003-05-16 2004-11-25 Wilhelm Sihn Jr. Gmbh & Co. Kg Antenne multibande

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998038694A1 (fr) * 1997-02-25 1998-09-03 Pates Technology Patentverwertungsgesellschaft Für Satelliten- Und Moderne Informationstechnologien Mbh Antenne accordee
US6392599B1 (en) * 1997-03-20 2002-05-21 David Ganeshmoorthy Communication antenna and equipment
US6559809B1 (en) * 2001-11-29 2003-05-06 Qualcomm Incorporated Planar antenna for wireless communications
EP1469554A1 (fr) * 2003-04-15 2004-10-20 Hewlett-Packard Development Company, L.P. Dispositif d'antenne monopôle à double entrée
WO2004102742A1 (fr) * 2003-05-16 2004-11-25 Wilhelm Sihn Jr. Gmbh & Co. Kg Antenne multibande

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PEY-LING TENG ET AL: "Multi-frequency planar monopole antenna for GSM/DCS/PCS/WLAN operation", MICROWAVE AND OPTICAL TECHNOLOGY LETTERS WILEY USA, vol. 36, no. 5, 5 April 2003 (2003-04-05), pages 350 - 352, XP002392289 *
RAHMAN M ET AL: "Dual-band strip-sleeve monopole for handheld telephones", MICROWAVE AND OPTICAL TECHNOLOGY LETTERS WILEY USA, vol. 21, no. 2, 20 April 1999 (1999-04-20), pages 79 - 82, XP002392288 *
STUCHLY M A ET AL: "Modeling antenna close to the human body", 2000 IEEE AEROSPACE CONFERENCE PROCEEDINGS 18-25 MARCH 2000 BIG SKY, MT, USA, vol. 5, 2000, 2000 IEEE Aerospace Conference. Proceedings (Cat. No.00TH8484) IEEE Piscataway, NJ, USA, pages 83 - 89, XP002392287 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2928037A1 (fr) * 2008-02-21 2009-08-28 Composants Electr Soc D Antenne pour vehicule automobile, en particulier pour la reception de signaux radio terrestre et/ou satellites.
EP2096708A1 (fr) * 2008-02-21 2009-09-02 Societe De Composants Electriques Antenne pour véhicule automobile, en particulier pour la réception de signaux radio terrestres et/ou satellites
EP2673840A4 (fr) * 2011-02-08 2014-11-26 Taoglas Group Holdings Antenne double bande complémentaire en double v, alignée en série, procédé de fabrication et kits correspondants
US9252486B2 (en) 2011-02-08 2016-02-02 Taoglas Group Holdings Dual-band series-aligned complementary double-V antenna, method of manufacture and kits therefor
US9595758B2 (en) 2011-02-08 2017-03-14 Taoglas Group Holdings Dual-band, series-aligned antenna, method of manufacture and kits therefor
EP2683030A1 (fr) * 2012-07-04 2014-01-08 Arcadyan Technology Corp. Antenne monopole à large bande et dispositif électronique
WO2015185267A1 (fr) * 2014-06-05 2015-12-10 Te Connectivity Germany Gmbh Agencement d'antenne avec unité d'antenne et unité de connecteur ainsi que procédé de production
WO2019066713A1 (fr) 2017-09-28 2019-04-04 Shortlink Resources Ab Antenne à large bande
EP3688836A4 (fr) * 2017-09-28 2021-07-07 Shortlink Resources AB Antenne à large bande
US11515631B2 (en) * 2017-09-28 2022-11-29 Shortlink Resources Ab Wideband antenna

Also Published As

Publication number Publication date
CN1855625A (zh) 2006-11-01
EP1717902B1 (fr) 2009-03-04
DE602006005413D1 (de) 2009-04-16

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