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EP1414106B1 - Antenne multibande pour un dispositif de radiocommunication - Google Patents

Antenne multibande pour un dispositif de radiocommunication Download PDF

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Publication number
EP1414106B1
EP1414106B1 EP02445140A EP02445140A EP1414106B1 EP 1414106 B1 EP1414106 B1 EP 1414106B1 EP 02445140 A EP02445140 A EP 02445140A EP 02445140 A EP02445140 A EP 02445140A EP 1414106 B1 EP1414106 B1 EP 1414106B1
Authority
EP
European Patent Office
Prior art keywords
transverse member
transverse
antenna
longitudinal
antenna device
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.)
Expired - Lifetime
Application number
EP02445140A
Other languages
German (de)
English (en)
Other versions
EP1414106A1 (fr
Inventor
Kenneth Hakansson
Johan Andersson
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.)
Sony Mobile Communications AB
Original Assignee
Sony Ericsson Mobile Communications AB
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
Priority to EP02445140A priority Critical patent/EP1414106B1/fr
Application filed by Sony Ericsson Mobile Communications AB filed Critical Sony Ericsson Mobile Communications AB
Priority to DE60216470T priority patent/DE60216470T2/de
Priority to AT02445140T priority patent/ATE347181T1/de
Priority to PCT/EP2003/011589 priority patent/WO2004038856A1/fr
Priority to US10/531,247 priority patent/US7415248B2/en
Priority to CNB2003801017175A priority patent/CN100468861C/zh
Priority to AU2003274044A priority patent/AU2003274044A1/en
Publication of EP1414106A1 publication Critical patent/EP1414106A1/fr
Application granted granted Critical
Publication of EP1414106B1 publication Critical patent/EP1414106B1/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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements

Definitions

  • the present invention relates generally to antennas for radio communication terminals and, in particular, to compact built-in antennas devised to be incorporated into portable terminals and having a wide bandwidth to facilitate operation of the portable terminals within different frequency bands.
  • PCNs Personal Communication Networks
  • the Cellular hyperband is assigned two frequency bands (commonly referred to as the A frequency band and the B frequency band) for carrying and controlling communications in the 800 MHz region.
  • the PCS hyperband is specified in the United States to include six different frequency bands (A, B, C, D, E and F) in the 1900 MHz region.
  • A, B, C, D, E and F six different frequency bands
  • PCS hyperband e.g., PCS 1900 (J-STD-007)
  • Cellular hyperband e.g., D-AMPS (IS-136)
  • Other frequency bands in which these devices will be operating include GPS (operating in the 1.5 GHz range) and UMTS (operating in the 2.0 GHz range).
  • Each one of the frequency bands specified for the Cellular and PCS hyperbands is allocated a plurality of traffic channels and at least one access or control channel.
  • the control channel is used to control or supervise the operation of mobile stations by means of information transmitted to and received from the mobile stations.
  • Such information may include incoming call signals, outgoing call signals, page signals, page response signals, location registration signals, voice channel assignments, maintenance instructions, hand-off, and cell selection or reselection instructions as a mobile station travels out of the radio coverage of one cell and into the radio coverage of another cell.
  • the control and voice channels may operate using either analogue modulation or digital modulation.
  • the signals transmitted by a base station in the downlink over the traffic and control channels are received by mobile or portable terminals, each of which have at least one antenna.
  • portable terminals have employed a number of different types of antennas to receive and transmit signals over the air interface.
  • monopole antennas mounted perpendicularly to a conducting surface have been found to provide good radiation characteristics, desirable drive point impedance and relatively simple construction.
  • Monopole antennas can be created in various physical forms. For example, rod or whip antennas have frequently been used in conjunction with portable terminals. For high frequency applications where an antenna's length is to be minimised, another choice is the helical antenna.
  • mobile terminal manufacturers encounter a constant demand for smaller and smaller terminals. This demand for miniaturisation is combined with desire for additional functionality such as having the ability to use the terminal at different frequency bands and different cellular systems.
  • PIFA planar inverted-F antennas
  • the geometry of a conventional PIFA antenna includes a radiating element, a feeding pin for the radiating element, a ground pin for the radiating element, and a ground substrate commonly arranged on a printed circuit board (PCB). Both the feeding pin and the ground pin are arranged perpendicular to the ground plane, and radiating element is suspended above the ground plane in such a manner that the ground plane covers the area under the radiating element.
  • This type of antenna generally has a fairly small bandwidth in the order of 100 MHz.
  • the vertical distance between the radiating element and the PCB ground has to be increased, i.e. the height at which the radiating element is placed above the PCB is increased.
  • Another solution to this problem is to add a dielectric element between the antenna and the PCB, in order to make the electrical distance longer than the physical distance.
  • US 6,326,921 to Ying et al discloses a built-in, low-profile antenna with an inverted planar inverted F-type (PIFA) antenna and a meandering parasitic element, and having a wide bandwidth to facilitate communications within a plurality of frequency bands.
  • a main element is placed at a predetermined height above a substrate of a communication device and the parasitic element is placed on the same substrate as the main antenna element and is grounded at one end.
  • the feeding pin of the PIFA is proximal to the ground pin of the parasitic element.
  • the coupling of the meandering, parasitic element to the main antenna results in two resonances. These two resonances are adjusted to be adjacent to each other in order to realise a broader resonance encompassing the DCS (Digital Cellular System), PCS and UMTS frequency ranges.
  • DCS Digital Cellular System
  • PCS Personal Communications Service
  • US 2002/0070902 discloses a compact single or multiple band antenna assembly for wireless communications devices.
  • One multi-band embodiment includes a high frequency portion and a low frequency portion, both fed at a common point by a single feed line. Both portions may be formed as a single stamped metal part or metallized plastic part.
  • the overall size is suitable for integration within a wireless device such as a cell phone.
  • the low frequency portion consists of two resonant sections which are stagger tuned to achieve a wide resonant bandwidth.
  • a multiband radio antenna device for a radio communication terminal, comprising a flat ground substrate, and in a plane parallel to said ground substrate a flat parasitic element and a flat antenna element with a feeding point, wherein said antenna element has a first longitudinal member, a first transverse member extending from a first end portion of said first longitudinal member, and a second transverse member extending from a centre portion of said first longitudinal member in the same direction as said first transverse member, wherein said parasitic element extends adjacent to an outer portion of and parallel to said second transverse member.
  • said feeding point is disposed at a centre portion of said second transverse member.
  • said parasitic element has a first ground connection disposed adjacent to said feeding point.
  • a second ground connection may be disposed at an end portion of said second transverse member opposite said first longitudinal member.
  • a third ground connection is further disposed at a centre portion of said first transverse member.
  • said antenna element has a second longitudinal member extending from said end portion of said second transverse member, away from said first transverse member.
  • said antenna element has a third transverse member extending from an end portion of said second longitudinal member opposite said second transverse member, towards said first longitudinal member.
  • said antenna element has a fourth transverse member extending from said first longitudinal member between said second and said third transverse members.
  • said feeding point is disposed on a protruding member at said centre portion of the second transverse member, protruding towards first transverse member.
  • Said protruding member is preferably tapered towards said first transverse member.
  • said parasitic element has a leg member extending parallel to a side of the tapered protruding member facing away from said first longitudinal member.
  • a an outer portion, extending from said centre portion, of said first transverse member has a side edge facing said second transverse member, which side edge extends at an angle towards said second transverse member, such that said first transverse member widens towards its outer end.
  • said parasitic element has one ground connection, whereas said antenna element has two ground connections.
  • said ground plane has a longitudinal length of one third of a selected base band.
  • a radio communication terminal comprising a multiband radio antenna device according to any of the previous claims.
  • radio terminals refers to radio terminals as a device in which to implement a radio antenna design according to the present invention.
  • the term radio terminal includes all mobile equipment devised for radio communication with a radio station, which radio station also may be mobile terminal or e.g. a stationary base station. Consequently, the term radio terminal includes mobile telephones, pagers, communicators, electronic organisers, smartphones, PDA:s (Personal Digital Assistants), vehicle-mounted radio communication devices, or the like, as well as portable laptop computers devised for wireless communication in e.g. a WLAN (Wireless Local Area Network). Furthermore, since the antenna as such is suitable for but not restricted to mobile use, the term radio terminal should also be understood as to include any stationary device arranged for radio communication, such as e.g.
  • the present invention provides an antenna design with a complex pattern and three grounding points.
  • Computer simulations with surprisingly good results have been made. These simulations have been performed using the tool IE3D, distributed by Zeland Inc. This tool uses the Moment Method as a mathematical solver, and simulation results obtained correlate well with measurement tests on prototypes, such as those disclosed in Fig.5, which will be explained further down.
  • Fig 1 discloses an enlarged view of an antenna device 1 according to the invention.
  • the antenna device 1 comprises an antenna element 3, a parasitic element 7 and a ground plane or substrate 2.
  • a cut-off portion of the ground plane 2 is illustrated in fig 1.
  • the actual length of ground plane 2, that is the height in fig 1 is preferably approximately equal to one third of the wavelength for the lower frequency band for which the multiband antenna 3 is tuned.
  • said lower band is 900 MHz, wherein the ground plane length can be calculated to approximately 11 cm.
  • the implementation of the ground plane 2 having a length of about one third of the lower band wavelength constitutes a preferred embodiment but it should be noted that other lengths may be used as well.
  • the antenna 3 has a fairly complex structure in its preferred embodiment as illustrated in fig 1, and measurements made on this structure has shown excellent results.
  • the structure basically comprises a number of antenna elements substantially extending in a longitudinal direction or a transverse direction, perpendicular to said longitudinal direction.
  • longitudinal direction is here meant a direction in which the ground plane 2 extends, i.e. vertical in fig 1, whereas the transverse direction extends from left to right or vice versa.
  • the antenna comprises one integrated antenna element 3 and a parasitic element 7, electrically separated from the antenna element 3.
  • the antenna element comprises a first longitudinal member 4, which extends in the longitudinal direction a part of a side edge of the ground plane 2.
  • a first transverse member 5 extends perpendicular to the first longitudinal member along the top edge of ground plane 2.
  • the first transverse member has an upper straight edge and a lower edge, which at first is parallel to the upper edge. From the central portion of the first transverse member the lower edge is slightly angled downwards, such that the first transverse member 5 widens from that central portion to the end portion opposite the first longitudinal member 4. From a central portion of the first longitudinal member 4, a second transverse member 6 extends likewise perpendicular to the first longitudinal member 4, consequently substantially parallel to the first transverse member 5.
  • the parasitic element 7 is located adjacent to an outer portion of the second transverse member 6, and extends substantially parallel to said second transverse member 6.
  • a protruding member 15 is formed, projecting towards the first transverse member 5.
  • the protruding member 15 is tapered towards said first transverse member 5, consequently having angled side edges, but has a straight ending perpendicular to the first longitudinal member 4.
  • the parasitic element 7 extends, as mentioned, substantially perpendicular to the first longitudinal member 4, but further comprises a leg member 16 extending at an angle towards said first transverse member and parallel to the adjacent side edge of protruding member 15.
  • the leg member 16 ends approximately at the same longitudinal position as protruding member 15, but preferably has a top edge sloping slightly downwards in the direction away from the first longitudinal member 4.
  • the structure of the antenna device according to the present invention has one feeding point 8 and three ground connections 9,10,11.
  • the feeding point 8 is connected to the top edge of the protruding member 15, and is indicated by a double line in the drawing.
  • a first ground connection 9 of the antenna device is connected to the top edge of the leg 16 of the parasitic element 7, consequently adjacent to the feeding point 8.
  • the first grounding point or connection 9 is indicated by a double line in the drawing.
  • a second grounding point or connection 10 is positioned at the outermost end of the second transverse antenna member 6, adjacent to a second end of antenna member 7 opposite the end were said first ground connection 9 is disposed.
  • a third ground connection 11 is disposed at a central portion of the first transverse member 5, at a position were the widening of said first transverse member 5 begins.
  • the second and third ground connections are indicated by double lines.
  • a second longitudinal member 12 extends from the end portion of the second transverse member, in a direction downwards away from the first transverse member 5.
  • the second longitudinal member 12 is significantly wider than the first longitudinal member 4, but also significantly shorter.
  • a third transverse member 13 extends towards the first longitudinal member 4, leaving only a small gap between the end portion of a third transverse member 13 and the first longitudinal member 4.
  • the fourth transverse member 14 extends from the first longitudinal member 4 between the second 6 and third 13 transverse members, and significantly closer to the third transverse member 13.
  • the fourth transverse member 14 is significantly thinner than the third transverse member 13.
  • the size of the antenna structure including the antenna element 3 and the parasitic element 7, is about 38 mm wide and 37 mm in the longitudinal direction. Preferably it is applied about 8 mm over ground plane 2.
  • the antenna structure itself is very thin and can be made of for instance a flex film.
  • Fig 2 illustrates the antenna device according to an embodiment of the present invention, disclosing the full length of ground plane 2.
  • Fig. 3 illustrates a cross-sectional side view of a radio communication terminal in the embodiment of a cellular mobile phone 30, devised for multiband radio communication.
  • the terminal 30 comprises a chassis incorporating a PCB 31, which extends longitudinally in the terminal 30.
  • the chassis carries functional members 32 of the terminal, including user interfaces and electronics, though not further specified in the drawing.
  • a preferably detachable battery 33 is also connected to the terminal.
  • the antenna 3 is also illustrated, spaced apart from the PCB 31.
  • the flat ground substrate 2 is preferably devised as a conductive layer in the PCB 31, either on an outer surface thereof or as an intermediate layer.
  • the three ground connections 9, 10 and 11 are also schematically illustrated, as well as the feeding point connection 8 to the PCB 31.
  • a housing 34 encloses the terminal, although e.g. the battery 33 and the user interfaces preferably are not covered by the housing 34.
  • Fig. 4 illustrates the terminal 30 of Fig. 3 as seen from the front side, i.e. the side facing left in Fig. 3.
  • the terminal 30 further includes a user output, and possibly input, interface is the form of a display 35.
  • a user-input interface is further included in the form of a keypad 36.
  • the terminal also comprises a user audio input in the form of a microphone 37 and a user audio output in the form of a loudspeaker 38 or a connector to an earpiece (not shown).
  • the antenna arrangement according to the invention is built in, and is therefore not explicitly shown in Fig. 4.
  • Fig 5 illustrates the VSWR 50 and the Smith chart as measured on a prototype of the antenna according to fig 1 in free space.
  • Markers 1 to 4 are equal to 880 MHz, 960 MHz, 1,710 MHz and 1,990 MHz, i.e. the frequency band edges for EGSM, DCS and PCS. As can be seen the margins are very large for each band, especially GSM. It is no problem covering AMPS as well.
  • the VSWR 50 is below 4.0 in all those bands, and for DCS and PCS the VSWR 50 is below 2.2. According to the Smith chart the antenna is generally a little inductive.

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

Claims (11)

  1. Dispositif d'antenne radio multibande (1) pour un terminal de radiocommunication, comprenant un substrat de masse plan (2), et dans un plan parallèle à ce substrat de masse, un élément parasite plan (7) ayant une connexion de masse (9), et un élément d'antenne plan (3) ayant un point d'alimentation (8) et des première et deuxième connexions de masse (10, 11), dans lequel l'élément d'antenne a un premier organe longitudinal (4), un premier organe transversal (5) s'étendant à partir d'une première partie d'extrémité du premier organe longitudinal, et un deuxième organe transversal (6) s'étendant à partir du premier organe longitudinal dans la même direction que le premier organe transversal, l'élément parasite s'étendant parallèlement au deuxième organe transversal, caractérisé en ce que le deuxième organe transversal (6) s'étend à partir d'une partie centrale du premier organe longitudinal, l'élément parasite (7) s'étend entre les premier et deuxième organes transversaux, le long d'une partie extérieure du deuxième organe transversal (6) et en position adjacente à celle-ci, à partir d'une partie centrale du deuxième organe transversal (6), le point d'alimentation (8) étant disposé dans une partie centrale du deuxième organe transversal (6), la première connexion de masse (10) de l'élément d'antenne étant disposée dans une partie d'extrémité, opposée audit organe longitudinal, du deuxième organe transversal (6), et la deuxième connexion de masse (11) de l'élément d'antenne étant disposée dans une partie centrale du premier organe transversal (5).
  2. Dispositif d'antenne radio multibande selon la revendication 1, caractérisé en ce que l'élément parasite a une première connexion de masse (9) disposée en position adjacente au point d'alimentation.
  3. Dispositif d'antenne radio multibande selon la revendication 1, caractérisé en ce que l'élément d'antenne a un deuxième organe longitudinal (12) s'étendant à partir de ladite partie d'extrémité du deuxième organe transversal, en s'éloignant du premier organe transversal.
  4. Dispositif d'antenne radio multibande selon la revendication 3, caractérisé en ce que l'élément d'antenne a un troisième organe transversal (13) s'étendant à partir d'une partie d'extrémité du deuxième organe longitudinal opposée au deuxième organe transversal, vers le premier organe longitudinal.
  5. Dispositif d'antenne radio multibande selon la revendication 4, caractérisé en ce que l'élément d'antenne a un quatrième organe transversal (14) s'étendant à partir du premier organe longitudinal entre les deuxième et troisième organes transversaux.
  6. Dispositif d'antenne radio multibande selon la revendication 1, caractérisé en ce que le point d'alimentation est disposé sur un organe en saillie (15) dans la partie centrale du deuxième organe transversal, faisant saillie vers le premier organe transversal.
  7. Dispositif d'antenne radio multibande selon la revendication 6, caractérisé en ce que l'organe en saillie va en diminuant en direction du premier organe transversal.
  8. Dispositif d'antenne radio multibande selon la revendication 7, caractérisé en ce que l'élément parasite a une branche (16) s'étendant parallèlement à un côté de l'organe en saillie allant en diminuant, se trouvant à l'opposé du premier organe longitudinal.
  9. Dispositif d'antenne radio multibande selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une partie extérieure, s'étendant à partir de la partie centrale, du premier organe transversal a un bord latéral faisant face au deuxième organe transversal, ce bord latéral s'étendant sous un angle en direction du deuxième organe transversal, de façon que le premier organe transversal s'élargisse vers son extrémité extérieure.
  10. Dispositif d'antenne radio multibande selon l'une quelconque des revendications précédentes, caractérisé en ce que le plan de masse a une longueur longitudinale d'un tiers d'une bande de base sélectionnée.
  11. Terminal de radiocommunication (30) comprenant un dispositif d'antenne radio multibande selon l'une quelconque des revendications précédentes.
EP02445140A 2002-10-22 2002-10-22 Antenne multibande pour un dispositif de radiocommunication Expired - Lifetime EP1414106B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE60216470T DE60216470T2 (de) 2002-10-22 2002-10-22 Mehrband-Antennenanordnung für Funkkommunikationsgerät
AT02445140T ATE347181T1 (de) 2002-10-22 2002-10-22 Mehrband-antennenanordnung für funkkommunikationsgerät
EP02445140A EP1414106B1 (fr) 2002-10-22 2002-10-22 Antenne multibande pour un dispositif de radiocommunication
US10/531,247 US7415248B2 (en) 2002-10-22 2003-10-20 Multiband radio antenna with a flat parasitic element
PCT/EP2003/011589 WO2004038856A1 (fr) 2002-10-22 2003-10-20 Antenne radio multibande
CNB2003801017175A CN100468861C (zh) 2002-10-22 2003-10-20 多频带无线电天线
AU2003274044A AU2003274044A1 (en) 2002-10-22 2003-10-20 Multiband radio antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02445140A EP1414106B1 (fr) 2002-10-22 2002-10-22 Antenne multibande pour un dispositif de radiocommunication

Publications (2)

Publication Number Publication Date
EP1414106A1 EP1414106A1 (fr) 2004-04-28
EP1414106B1 true EP1414106B1 (fr) 2006-11-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02445140A Expired - Lifetime EP1414106B1 (fr) 2002-10-22 2002-10-22 Antenne multibande pour un dispositif de radiocommunication

Country Status (4)

Country Link
EP (1) EP1414106B1 (fr)
CN (1) CN100468861C (fr)
AT (1) ATE347181T1 (fr)
DE (1) DE60216470T2 (fr)

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US7528782B2 (en) 1999-09-20 2009-05-05 Fractus, S.A. Multilevel antennae
US7554490B2 (en) 2000-01-19 2009-06-30 Fractus, S.A. Space-filling miniature antennas
US9099773B2 (en) 2006-07-18 2015-08-04 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices

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WO2004066437A1 (fr) 2003-01-24 2004-08-05 Fractus, S.A. Antennes a plaques en microruban tres directives a rayonnement transversal
FI120606B (fi) * 2003-10-20 2009-12-15 Pulse Finland Oy Sisäinen monikaista-antenni
FI20040584L (fi) 2004-04-26 2005-10-27 Lk Products Oy Antennielementti ja menetelmä sen valmistamiseksi
US20080062045A1 (en) * 2006-09-08 2008-03-13 Motorola, Inc. Communication device with a low profile antenna
CN103296386B (zh) * 2012-02-22 2015-06-17 上海德门电子科技有限公司 一种低sar值的多频段内置天线
CN106255185A (zh) * 2016-07-29 2016-12-21 广东欧珀移动通信有限公司 一种切换终端天线的方法、装置及移动终端

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Cited By (19)

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Publication number Priority date Publication date Assignee Title
US8976069B2 (en) 1999-09-20 2015-03-10 Fractus, S.A. Multilevel antennae
US8941541B2 (en) 1999-09-20 2015-01-27 Fractus, S.A. Multilevel antennae
US8009111B2 (en) 1999-09-20 2011-08-30 Fractus, S.A. Multilevel antennae
US9362617B2 (en) 1999-09-20 2016-06-07 Fractus, S.A. Multilevel antennae
US8154463B2 (en) 1999-09-20 2012-04-10 Fractus, S.A. Multilevel antennae
US9240632B2 (en) 1999-09-20 2016-01-19 Fractus, S.A. Multilevel antennae
US9054421B2 (en) 1999-09-20 2015-06-09 Fractus, S.A. Multilevel antennae
US8330659B2 (en) 1999-09-20 2012-12-11 Fractus, S.A. Multilevel antennae
US9000985B2 (en) 1999-09-20 2015-04-07 Fractus, S.A. Multilevel antennae
US7528782B2 (en) 1999-09-20 2009-05-05 Fractus, S.A. Multilevel antennae
US8154462B2 (en) 1999-09-20 2012-04-10 Fractus, S.A. Multilevel antennae
US8207893B2 (en) 2000-01-19 2012-06-26 Fractus, S.A. Space-filling miniature antennas
US8610627B2 (en) 2000-01-19 2013-12-17 Fractus, S.A. Space-filling miniature antennas
US7554490B2 (en) 2000-01-19 2009-06-30 Fractus, S.A. Space-filling miniature antennas
US8212726B2 (en) 2000-01-19 2012-07-03 Fractus, Sa Space-filling miniature antennas
US8471772B2 (en) 2000-01-19 2013-06-25 Fractus, S.A. Space-filling miniature antennas
US9331382B2 (en) 2000-01-19 2016-05-03 Fractus, S.A. Space-filling miniature antennas
US8558741B2 (en) 2000-01-19 2013-10-15 Fractus, S.A. Space-filling miniature antennas
US9099773B2 (en) 2006-07-18 2015-08-04 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices

Also Published As

Publication number Publication date
CN100468861C (zh) 2009-03-11
EP1414106A1 (fr) 2004-04-28
ATE347181T1 (de) 2006-12-15
DE60216470T2 (de) 2007-09-13
CN1706069A (zh) 2005-12-07
DE60216470D1 (de) 2007-01-11

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