EP1717902B1 - Antennes monopoles planaires - Google Patents

Antennes monopoles planaires Download PDF

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Publication number
EP1717902B1
EP1717902B1 EP20060007137 EP06007137A EP1717902B1 EP 1717902 B1 EP1717902 B1 EP 1717902B1 EP 20060007137 EP20060007137 EP 20060007137 EP 06007137 A EP06007137 A EP 06007137A EP 1717902 B1 EP1717902 B1 EP 1717902B1
Authority
EP
European Patent Office
Prior art keywords
ground
radiator
monopole antenna
planar monopole
sleeve
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.)
Active
Application number
EP20060007137
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German (de)
English (en)
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EP1717902A1 (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
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Wistron Neweb Corp
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Filing date
Publication date
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Publication of EP1717902A1 publication Critical patent/EP1717902A1/fr
Application granted granted Critical
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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.
  • EP 1 469 554 A1 discloses a dual-access monopole antenna assembly including two sleeve portions and a monopole element therebetween. The two sleeve portions are electrically connected to the ground. At a distance from the sleeve portions, a secondary monopole antenna for the Bluetooth or IEEE 802.11b band is arranged.
  • US 6 559 809 B1 discloses a planar antenna having first and second conductors arranged at different sides of a substrate. The first and second conductors may overlap.
  • US 6 392 599 B1 discloses a communication antenna having a radiator and two sleeve portions. However, no relationship of the lengths of these elements is defined.
  • 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 according to claim 1.
  • the present invention provides a planar monopole antenna including a substrate, a ground, a first sleeve portion, a second sleeve portion, a radiator and a cable connecting the radiator for communicating radio signals within a specific frequency range.
  • the first sleeve portion is formed on the substrate and electrically connected to the ground, wherein the first sleeve portion projects from a side of the ground in a first direction with a first length.
  • the second sleeve portion is formed on the substrate and electrically connected to the ground, wherein the second sleeve portion 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 from the first to the second sleeve portion.
  • the first and second sleeve portions extend from the ends of the side of the ground.
  • the longitudinal radiator is formed on the substrate and situated between the first and second sleeve portions, wherein the radiator comprises a main body and two L-shaped angle portions at the top end of and symmetrical with respect to the main body. Specifically, the angle portions 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 example 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 example can provide higher frequency coverage ratio and broader communication bandwidth than the conventional planar monopole antenna.
  • an embodiment of a planar monopole antenna comprises a deformed radiator R' to reduce the extent of the antenna in direction Y and facilitate miniaturization.
  • 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.
  • 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)

Claims (10)

  1. Antenne monopôle plane pour communiquer un signal radio, comportant :
    un substrat (S),
    une masse (G),
    une première partie de manchon (G1), formée sur le substrat (S) et électriquement reliée à la masse (G), la première partie de manchon (G1) faisant saillie depuis un côté de la masse (G) dans une première direction (Y) ayant une première longueur (L1),
    une seconde partie de manchon (G2), formée sur le substrat (S) et électriquement reliée à la masse (G), la seconde partie de manchon (G2) faisant saillie depuis le côté de la masse (G) dans la première direction (Y) ayant une deuxième longueur (L2), et le côté de la masse définit une troisième longueur (L3) de la première partie de manchon (G1) jusqu'à la seconde partie de manchon (G2),
    dans lequel les première et seconde parties de manchon (G1 ; G2) s'étendent depuis les extrémités du côté de la masse (G), l'antenne monopôle plane comportant en outre :
    un élément rayonnant (R), formé sur le substrat (S) et situé entre les première et seconde parties de manchon, l'élément rayonnant (R) comportant un corps principal longitudinal (R1) et deux parties d'angle en forme de L (R2 ; R3) reliées aux côtés opposés du dessus et du corps principal (R1), les deux parties d'angle en forme de L (R2 ; R3) étant symétriques par rapport au corps principal (R1) et s'étendant principalement dans la direction opposée à la première direction (Y), et la somme des longueurs du corps principal (R1) et de l'une ou l'autre des deux parties d'angle en forme de L (R2 ; R3) est sensiblement égale à la somme des première, deuxième et troisième longueurs (L1 ; L2 ; L3), et
    un câble reliant l'élément rayonnant (R) pour communiquer le signal radio.
  2. Antenne monopôle plane selon la revendication 1, dans laquelle chacune des parties d'angle (R2 ; R3) comporte une structure en zig zag.
  3. Antenne monopôle plane selon la revendication 1, dans laquelle la masse (G), l'élément rayonnant (R), les première et seconde parties de manchon (G1 ; G2) sont formées sur une surface du substrat (S).
  4. Antenne monopôle plane selon la revendication 1, dans laquelle la distance de l'élément rayonnant (R) jusqu'à la première partie de manchon (G1) est sensiblement égale à la distance de l'élément rayonnant (R) jusqu'à la seconde partie de manchon (G2).
  5. Antenne monopôle plane selon la revendication 1, dans laquelle les première et seconde parties de manchon (G1 ; G2) sont sensiblement perpendiculaires au côté de la masse (G).
  6. Antenne monopôle plane selon la revendication 1, dans laquelle la quatrième longueur est sensiblement égale à 1/4 de la longueur d'onde du signal radio.
  7. Antenne monopôle plane selon la revendication 1, dans laquelle la première longueur (L1) est sensiblement égale à la deuxième longueur (L2).
  8. Antenne monopôle plane selon la revendication 1, dans laquelle le substrat (S) est FR4.
  9. Antenne monopôle plane selon la revendication 8, dans laquelle la masse (G), l'élément rayonnant (R), les première et seconde parties de manchon (G1 ; G2) sont imprimés sur une surface du substrat (S) par fabrication PCB.
  10. Antenne monopôle plane selon la revendication 1, dans laquelle l'élément rayonnant (R) comporte une extrémité d'alimentation (RF) adjacente au côté de la masse (G), et le câble (W) comporte un fil de masse (W2) reliant la masse (G) et un fil de transmission de signal (W1) reliant l'extrémité d'alimentation (RF).
EP20060007137 2005-04-20 2006-04-04 Antennes monopoles planaires Active 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 EP1717902A1 (fr) 2006-11-02
EP1717902B1 true EP1717902B1 (fr) 2009-03-04

Family

ID=36406024

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

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

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2928037B1 (fr) * 2008-02-21 2010-03-26 Composants Electr Soc D Antenne pour vehicule automobile, en particulier pour la reception de signaux radio terrestre et/ou satellites.
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
WO2012109067A2 (fr) 2011-02-08 2012-08-16 Taoglas Group Holdings Antenne double bande complémentaire en double v, alignée en série, procédé de fabrication et kits correspondants
TWI508378B (zh) * 2012-07-04 2015-11-11 Arcadyan Technology Corp 寬頻單極天線與電子裝置
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
DE102014210738A1 (de) * 2014-06-05 2015-12-17 Te Connectivity Germany Gmbh Antennenanordnung mit antenneneinheit und verbindereinheit sowie herstellungsverfahren
SE541070C2 (sv) * 2017-09-28 2019-03-26 Shortlink Resources Ab Bredbandig antenn

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19707535A1 (de) * 1997-02-25 1998-08-27 Rothe Lutz Dr Ing Habil Folienstrahler
GB2323476B (en) * 1997-03-20 2002-01-16 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

Also Published As

Publication number Publication date
DE602006005413D1 (de) 2009-04-16
CN1855625A (zh) 2006-11-01
EP1717902A1 (fr) 2006-11-02

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