WO2006114477A1 - Antenne a fente - Google Patents

Antenne a fente Download PDF

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Publication number
WO2006114477A1
WO2006114477A1 PCT/FI2006/050111 FI2006050111W WO2006114477A1 WO 2006114477 A1 WO2006114477 A1 WO 2006114477A1 FI 2006050111 W FI2006050111 W FI 2006050111W WO 2006114477 A1 WO2006114477 A1 WO 2006114477A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
slot
ground plane
auxiliary element
circuit board
Prior art date
Application number
PCT/FI2006/050111
Other languages
English (en)
Inventor
Heikki Korva
Original Assignee
Pulse Finland Oy
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 Pulse Finland Oy filed Critical Pulse Finland Oy
Publication of WO2006114477A1 publication Critical patent/WO2006114477A1/fr

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
    • 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
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot 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
    • H01Q5/10—Resonant antennas
    • H01Q5/15—Resonant antennas for operation of centre-fed antennas comprising one or more collinear, substantially straight or elongated active elements
    • 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
    • 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

Definitions

  • the invention relates to an antenna designed for portable radio devices, which antenna includes a radiating slot in the ground plane of the radio device.
  • the invention also relates to a radio device with an antenna according to the invention.
  • the space available is an important factor in the design of antennas for portable radio devices. Without any limit on size, it is relatively easy to make a high-quality antenna. However, in portable devices the antenna is preferably placed within the cover of the device, and along with the reduction of the size of the devices, the space available for the antenna has become smaller and smaller. This means that design has become ever more demanding. The fact that the antenna often has to operate in two or more frequency bands contributes to the same.
  • the antenna includes a radiating plane and a ground plane parallel with it. These planes are usually con- nected to each other at a suitable point by a short-circuit conductor, in which case a structure of the PIFA (planar inverted F antenna) type is created.
  • the size of the ground plane naturally has an effect on the characteristics of the antenna.
  • the ground plane of an ideal planar antenna is also very wide. When the ground plane becomes smaller, the performance of the an- tenna deteriorates because the antenna resonances are weakened and because of the resonances of the ground plane itself.
  • the antenna is based on a radiating slot in the ground plane.
  • the application publication Fl 20021668 discloses an antenna structure with a radiating slot in its ground plane.
  • This antenna structure is seen in Fig. 1. It shows the circuit board 105 of a radio device, where most of the upper surface of the circuit board is conductive. This conductive surface functions as the ground plane 110 of the antenna.
  • At the one end of the circuit board there is the radiating plane 120 of the antenna, to which plane the antenna feed conductor 131 and the short-circuit conductor 132 are connected.
  • the radiating plane of the example is divided, as viewed from its short circuit point, into two branches B1 , B2 of different lengths for forming two separate operating bands.
  • the ground plane 110 there are two parallel slots starting from its edge.
  • the first slot 115 runs beside the short circuit point S of the antenna, and the second slot 116 in a way that the antenna feed point F on the surface of the circuit board 105 remains between the first and the second slot.
  • the second slot can be dimensioned so that oscillation is excited in it in the antenna's upper operating band, in which the slot then improves the matching.
  • the slot radiator according to Fig. 1 is only an auxiliary radiator of the PIFA in the upper operating band of the antenna.
  • the lower operating band is based on the lower resonance of the PIFA.
  • the radiating plane of the PIFA is necessary, in which case the above-mentioned drawbacks of the PIFA also exist.
  • a proper operating band based on a slot resonance in the range of 0.9 GHz is not obtained.
  • the object of the invention is to reduce the above mentioned drawbacks of the prior art.
  • the slot antenna according to the invention is characterized in what is set forth in the independent claim 1.
  • the radio device according to the invention is characterized in what is set forth in the independent claim 7.
  • the functional main part of the an- tenna of a small-sized radio device is a slot in the ground plane of the device, open at its one end.
  • the slot is located in a way that a relatively narrow strip of the ground plane remains between it and an edge of the ground plane.
  • an elongated auxiliary element which elevates slightly from the ground plane and is then di- rected towards the closed end of the slot.
  • the auxiliary element increases the electric length of the slot so that the basic resonance frequency of the slot occurs in the range of the lower operating band of the antenna intended as a dual-band antenna.
  • the slot thus functions as a radiator in the lower operating band.
  • the antenna is fed from a point that is advantageous with regard to the matching, near the closed end of the slot.
  • the auxiliary element is dimensioned so that when the antenna is fed by the frequencies of the upper operating band, vibration of its own is excited in the auxiliary element, in which case it functions as a radiator in the upper operating band.
  • the invention has the advantage that the lower operating band of a dualband an- tenna can also be implemented by a structure that takes a relatively small amount of space. This is due to the fact that a slot radiator in the ground plane is used, and the required auxiliary element has a significantly smaller area and is closer to the ground plane than the radiating plane of a PIFA, for example.
  • the invention has the advantage that in the antenna according to it, the space between the auxiliary element and the ground plane can be utilized by placing other components of the radio device in that space.
  • the invention has the advantage that the antenna according to it can be situated more advantageously with regard to SAR (specific absorption rate) than the prior art antennas.
  • the matching of the antenna according to it does not require separate matching components.
  • Figure 1 presents an example of a ground plane slot radiator according to the prior art
  • Figure 2 presents an example of an antenna according to the invention
  • Figure 3 presents an example of the feed and ground arrangement of an antenna according to the invention
  • Figure 4 presents examples of the tuning of an antenna according to the invention
  • Figure 5 presents an example of the location of an antenna according to the invention in the radio device
  • Figure 6 presents another example of the location of an antenna according to the invention in the radio device
  • Figure 7 presents an example of the band characteristics of an antenna accord- ing to the invention
  • Figure 8 presents an example of the efficiency of an antenna according to the invention.
  • Figure 9 presents an example of the influence of the user's head on the efficiency of antennas.
  • FIG. 2 shows an example of an antenna according to the invention.
  • a circuit board 205 of a radio device most of the upper surface of which board is conductive, is seen in the figure.
  • This conductive surface functions as the signal ground, or ground plane 210, of the radio device.
  • At one end of the circuit board there is a non-conductive slot 220 in the ground plane.
  • This slot starts from an edge of the ground plane, i.e. it opens to the edge of the ground plane.
  • the slot 220 runs in the direction of the end of the ground plane, and its other end, or the closed end, extends relatively close to the opposite long side of the ground plane, as seen from the open end of the slot.
  • a relatively narrow area 212 of the ground plane which is called a ground strip here, remains between the slot and the end of the ground plane.
  • the qualifier "relatively" in connection with a distance refers to such a distance, which is smaller by at least an order than the wavelength corresponding to the highest operating frequency of the antenna.
  • An oscillation can be excited in the slot 220 by feeding electromagnetic energy to it at the natural frequency of the slot. Then the slot functions as a radiator, sending energy to its environment.
  • the feed point FP of the slot radiator is marked by a dashed line, which point is near the closed end of the slot in this example.
  • the properties of such a slot radiator like efficiency, are not yet satisfactory.
  • the fact that the slot opens to the edge of the ground plane makes it a quarter-wave resonator. This helps to achieve lower natural frequencies as compared to half- wave resonators, but not enough.
  • the antenna structure according to the inven- tion also includes a conductive auxiliary element 230.
  • This is a piece made of relatively rigid sheet metal, for example, with an elongated first portion and a second portion essentially perpendicular to it.
  • the auxiliary element is galvanically connected to the end of the ground strip 212 beside the open end of the slot 220 so that the first portion of the auxiliary element is above the ground strip 212. It can also extend above the slot 220 in its transverse direction. In its longitudinal direction, the first portion extends roughly to the closed end of the slot. Its distance from the ground plane, or the height of the antenna corresponding to the second portion of the auxiliary element, is relatively small, e.g. 5 mm.
  • the auxiliary element 230 naturally has an effect on the characteristics of the antenna.
  • the equivalent circuit of the slot at its natural frequency is a parallel reso- nance circuit.
  • the auxiliary element increases both the inductance and the capacitance in the equivalent circuit, in which case the natural frequency of the structure becomes lower.
  • the same thing can also be expressed by saying that the auxiliary element increases the electric length of the slot.
  • the auxiliary element can be di- mensioned so that the natural frequency of the antenna falls in the frequency range of the GSM850 or the GSM900 (Global System for Mobile communications), for example, even if the physical length of the radiating slot were under 4 cm.
  • An additional feature in the operation of the antenna is that an oscillation can be excited in the auxiliary element at its own natural frequency.
  • the natural frequency of the auxiliary element can be arranged in the frequency range of the GSM1800 or the GSM 1900 system, for example, in which case the antenna has two usable operating bands.
  • the lower operating band is based on the slot of the ground plane lengthened by the auxiliary element, and the upper operating band is based on the auxiliary element.
  • Fig. 3 presents an example of the feed and ground arrangement of the antenna according to the invention.
  • the circuit board 305 of a radio device as seen from above and in the part drawing (b) as seen from below.
  • On the upper surface of the circuit board there is the radiating slot 320 of the antenna in the ground plane 310, like in Fig. 2.
  • the auxiliary element 330 as cut is also seen in the part drawing (a).
  • the antenna is fed electromagnetically by a feed conductor 340.
  • the feed conductor is a conductor strip on the lower surface of the circuit board 305.
  • the strip extends from the antenna port essentially perpendicularly over the line of the radiating slot at the feed point FP near the closed end of the slot.
  • the signal ground GND is on the lower surface of the circuit board at a certain distance from the slot 320, so there is no ground at the slot or quite near it.
  • the impedance of the antenna structure as measured from the antenna port is influenced by, among other things, the location of the feed point FP and the length of the free portion of the feed conductor 340.
  • the antenna can be matched without separate matching components.
  • the feed conductor can also be continued through the circuit board to its upper surface and be connected there to the edge of the radiating slot on the side of the ground strip 312.
  • Fig. 4 shows two examples of the tuning of the antenna according to the invention.
  • the slot 420 forms a meander pattern.
  • Another way is to shape the auxiliary element.
  • a part CUT has been cut off from the first portion of the auxiliary element 430 above the ground strip 412.
  • the third way is to change the height h of the auxiliary element, or the distance of the first portion from the ground.
  • the marking ⁇ h in the figure means such a change.
  • Fig. 5 shows an example of the location of an antenna according to the invention in the radio device.
  • the radio device RD1 of the example is a foldable mobile station having a first turning part TP1 and a second turning part TP2, both connected to a hinge HG.
  • the radio device is shown as a simplified longitudinal cross- section.
  • the first turning part includes, among other things, the keyboard and microphone of the device, and the second turning part includes, among other things, the display and the earphone EP of the device.
  • the second turning part is thus the part of the device held on the user's ear.
  • the antenna 500 is located at the opposite end of the first turning part as viewed from the hinge HG.
  • the radiating slot and the auxiliary element are on the outer side of the circuit board 505 of the first turning part in the normal using position as seen from the user.
  • Such a location means a relatively small SAR value when the earphone EP is adjacent to the user's ear.
  • Fig. 6 shows another example of the location of an antenna according to the invention in the radio device.
  • the radio device RD2 of this example is also mechanically two-part, the parts being now slidable in relation to each other. So the device has a first sliding part SP1 and a second sliding part SP2.
  • the radio device is shown as a simplified longitudinal cross-section.
  • the first sliding part includes, among other things, the keyboard and microphone of the device
  • the second sliding part includes, among other things, the display and the earphone EP of the device.
  • the second sliding part is thus the part of the device held on the user's ear.
  • the antenna 600 is located at the end of the first sliding part that is farther from the second sliding part when the radio device is in its extended position.
  • the radiating slot and the auxiliary element are on the outer side of the circuit board 605 of the first turning part in the normal using position as seen from the user.
  • Such a location means a relatively small SAR value when the earphone EP is adjacent to the user's ear.
  • Fig. 7 shows an example of the band characteristics of an antenna according to the invention.
  • the curve 71 shows the changing of the return loss RL as a function of frequency when the antenna is in the free state.
  • the antenna has two clear operating bands.
  • the lower operating band is in the range of 850 MHz, and its width is approx. 90 MHz when the value -5 dB of the return loss is used as the criterion of the cut-off frequency. This bandwidth is considerably large.
  • the upper operating band is in the range of 1.9 GHz, and its width is approx. 70 MHz when the value -5 dB of the return loss is used as the criterion of the cut-off frequency. In the centre of the operating bands the return loss is about 15 dB, which indicates good matching.
  • Fig. 8 shows an example of the efficiency of an antenna according to the invention.
  • the curve 81 shows the change of the efficiency of the dualband antenna corresponding to the return loss curve of Fig. 7 as a function of frequency when the antenna is in the free state.
  • the efficiency varies on both sides of the value 0.6.
  • the efficiency is approx. 0.85 and decreases from it to the value of approx. 0.5 when reaching the edges of the band.
  • Fig. 8 also shows an efficiency curve 82 of a PIFA having the same operating bands. In the lower operating band, the efficiency of the PIFA is almost the same as that of the antenna according to the invention.
  • the PIFA is better than the antenna accord- ing to the invention, its efficiency being over 0.8 on the average.
  • the difference in the height of the antennas must be taken into account here.
  • the tested antenna according to the invention is 5 mm high, and the PIFA in comparison is 9 mm high.
  • the circuit board with its ground plane is of equal size in both antennas.
  • Fig. 9 shows an example of the influence of the user's head on the efficiency of the antennas.
  • the curve 91 concerns the same antenna according to the invention as the curve 81
  • the curve 92 concerns the same PIFA as the curve 82.
  • To the antennas are in this case in the normal position for use beside the user's head. It is seen that the efficiencies fall very clearly, but less for the antenna according to the invention than for the PIFA.
  • the efficiency of the antenna according to the invention is on the average 0.13, but that of the PIFA only 0.08.
  • the efficiency of the antenna according to the invention is on the average 0.11 , but that of the PIFA only 0.075.
  • the qualifiers "lower” and “upper” refer to a position of the antenna structure, in which the circuit board of the radio device is hori- zontal and the radiating slot of the antenna is on its upper surface. Naturally, the use position of the device can be whichever.
  • the auxiliary element may also have a slot for increasing the bandwidth, and there may be more than one auxiliary element.
  • the radiating slot and the ground strip separated by it can also run in the same direction as the long side of the circuit board of the radio device.
  • the circuit board of the radio device can be a multilayer board, in which case the antenna feed conductor can be located in one of its intermediate layers.

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

Abstract

La présente invention concerne une antenne à utiliser pour des dispositifs de radio portables, comprenant une fente radiante sur le plan de projection horizontal du dispositif de radio. Cette fente (220) est une pièce essentielle et fonctionnelle de l’antenne. Elle est située de manière à ce qu’une bande relativement étroite du plan de projection horizontal soit entre celle-ci et un bord du plan de projection horizontal (210). A l’extrémité de ladite bande horizontale (212), à côté de l’extrémité ouverte de la fente, est connecté un élément auxiliaire allongé (230), lequel s’élève légèrement du plan de projection horizontal et est alors dirigé vers l’extrémité fermée de la fente. L’élément auxiliaire augmente la longueur électrique de la fente de manière à ce que la fréquence de résonance de base de la fente se produise dans la gamme de bande opérationnelle la plus basse de l’antenne prévue comme une antenne à deux bandes. La fente (220) fonctionne alors comme un radiateur dans la bande opérationnelle la plus basse. L’antenne est alimentée depuis un point (FP) avantageux quant à l’adaptation, près de l’extrémité fermée de la fente. De plus, l’élément auxiliaire (230) est dimensionné de manière à ce que, l’antenne étant alimentée par les fréquences de la bande opérationnelle la plus haute, l’oscillation de celle-ci soit excitée dans l’élément auxiliaire, auquel cas elle agit comme un radiateur dans la bande opérationnelle la plus haute. Au moyen de l’invention, la bande opérationnelle la plus basse de l’antenne à deux bandes peut aussi être utilisée avec une structure occupant un espace relativement petit, l’antenne peut être placée très avantageusement par rapport au SAR, et l’adaptation de l’antenne ne requiert pas de composants d’adaptation séparés.
PCT/FI2006/050111 2005-04-28 2006-03-23 Antenne a fente WO2006114477A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20055200 2005-04-28
FI20055200A FI118749B (fi) 2005-04-28 2005-04-28 Rakoantenni

Publications (1)

Publication Number Publication Date
WO2006114477A1 true WO2006114477A1 (fr) 2006-11-02

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ID=34508199

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2006/050111 WO2006114477A1 (fr) 2005-04-28 2006-03-23 Antenne a fente

Country Status (2)

Country Link
FI (1) FI118749B (fr)
WO (1) WO2006114477A1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2912266A1 (fr) * 2007-02-07 2008-08-08 Satimo Sa Antenne imprimee avec encoches dans le plan de masse
WO2010010529A2 (fr) * 2008-07-24 2010-01-28 Nxp B.V. Agencement d’antenne et appareil radio comprenant l’agencement d’antenne
CN102013569A (zh) * 2010-12-01 2011-04-13 惠州Tcl移动通信有限公司 一种五频段的内置天线及其移动通信终端
CN102013567A (zh) * 2010-12-01 2011-04-13 惠州Tcl移动通信有限公司 一种五频段和蓝牙的内置天线及其移动通信终端
CN102013568A (zh) * 2010-12-01 2011-04-13 惠州Tcl移动通信有限公司 一种四频段的内置天线及其移动通信终端
EP2445053A1 (fr) * 2010-10-22 2012-04-25 Acer Incorporated Dispositif de communication mobile et antenne
JP2013070363A (ja) * 2011-09-09 2013-04-18 Fujitsu Ltd アンテナ装置及び携帯電話機
US8432321B2 (en) 2007-04-10 2013-04-30 Nokia Corporation Antenna arrangement and antenna housing
EP2637249A1 (fr) * 2012-03-08 2013-09-11 Acer Incorporated Antenne à fente accordable
CN103311671A (zh) * 2012-03-13 2013-09-18 宏碁股份有限公司 可调式槽孔天线
EP2685559A1 (fr) * 2012-07-10 2014-01-15 Samsung Electronics Co., Ltd Dispositif d'antenne variable à large bande et terminal portable l'utilisant
EP2713440A1 (fr) * 2012-06-21 2014-04-02 Huawei Device Co., Ltd. Terminal portable et antenne fendue associée
US8711044B2 (en) 2009-11-12 2014-04-29 Nokia Corporation Antenna arrangement and antenna housing
EP2387102A3 (fr) * 2010-05-11 2014-09-10 Sony Ericsson Mobile Communications AB Réseau d'antennes avec des éléments capacitifs d'antenne inférieurs et supérieurs couplés et motif de radiation de pic dirigé vers l'élément d'antenne inférieur
WO2016106612A1 (fr) * 2014-12-30 2016-07-07 华为技术有限公司 Dispositif d'antenne et terminal
JP2016136778A (ja) * 2011-09-09 2016-07-28 富士通株式会社 アンテナ装置
US9882264B2 (en) 2011-09-30 2018-01-30 Google Llc Antennas for computers with conductive chassis

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WO2004001894A1 (fr) * 2002-06-25 2003-12-31 Fractus, S.A. Antenne multibande pour terminal portable
US20040017318A1 (en) * 2002-07-26 2004-01-29 Amphenol Socapex Antenna of small dimensions

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Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2912266A1 (fr) * 2007-02-07 2008-08-08 Satimo Sa Antenne imprimee avec encoches dans le plan de masse
US8432321B2 (en) 2007-04-10 2013-04-30 Nokia Corporation Antenna arrangement and antenna housing
WO2010010529A2 (fr) * 2008-07-24 2010-01-28 Nxp B.V. Agencement d’antenne et appareil radio comprenant l’agencement d’antenne
WO2010010529A3 (fr) * 2008-07-24 2010-03-18 Nxp B.V. Agencement d’antenne et appareil radio comprenant l’agencement d’antenne
CN102106038A (zh) * 2008-07-24 2011-06-22 Nxp股份有限公司 天线装置及包括天线装置的无线电设备
US8638266B2 (en) 2008-07-24 2014-01-28 Nxp, B.V. Antenna arrangement and a radio apparatus including the antenna arrangement
US8711044B2 (en) 2009-11-12 2014-04-29 Nokia Corporation Antenna arrangement and antenna housing
EP2387102A3 (fr) * 2010-05-11 2014-09-10 Sony Ericsson Mobile Communications AB Réseau d'antennes avec des éléments capacitifs d'antenne inférieurs et supérieurs couplés et motif de radiation de pic dirigé vers l'élément d'antenne inférieur
EP2445053A1 (fr) * 2010-10-22 2012-04-25 Acer Incorporated Dispositif de communication mobile et antenne
US8599084B2 (en) 2010-10-22 2013-12-03 Acer Incorporated Mobile communication device and antenna
TWI411165B (zh) * 2010-10-22 2013-10-01 Acer Inc 行動通訊裝置和天線裝置
US9385429B2 (en) 2010-12-01 2016-07-05 Huizhou Tcl Mobile Communication Co., Ltd. Penta-band internal antenna and mobile communication terminal thereof
US9035833B2 (en) 2010-12-01 2015-05-19 Huizhou Tcl Mobile Communication Co., Ltd. Five-band Bluetooth built-in antenna and its mobile communication terminal
US9401544B2 (en) 2010-12-01 2016-07-26 Huizhou Tcl Mobile Communication Co., Ltd. Quad-band internal antenna and mobile communication terminal thereof
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FI20055200A0 (fi) 2005-04-28
FI118749B (fi) 2008-02-29

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