EP1154518A2 - Antenne intégrée pour téléphones portables - Google Patents

Antenne intégrée pour téléphones portables Download PDF

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Publication number
EP1154518A2
EP1154518A2 EP01440125A EP01440125A EP1154518A2 EP 1154518 A2 EP1154518 A2 EP 1154518A2 EP 01440125 A EP01440125 A EP 01440125A EP 01440125 A EP01440125 A EP 01440125A EP 1154518 A2 EP1154518 A2 EP 1154518A2
Authority
EP
European Patent Office
Prior art keywords
radiator
antenna arrangement
resonance frequency
antenna
frequency
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
EP01440125A
Other languages
German (de)
English (en)
Other versions
EP1154518A3 (fr
EP1154518B1 (fr
Inventor
Dirk Manteuffel
Achim Bahr
José Marie Baro
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.)
Alcatel CIT SA
Alcatel Lucent SAS
Original Assignee
Alcatel CIT SA
Alcatel SA
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 Alcatel CIT SA, Alcatel SA filed Critical Alcatel CIT SA
Publication of EP1154518A2 publication Critical patent/EP1154518A2/fr
Publication of EP1154518A3 publication Critical patent/EP1154518A3/fr
Application granted granted Critical
Publication of EP1154518B1 publication Critical patent/EP1154518B1/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
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • 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
    • 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
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating 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 arrangement (flat antenna arrangement, Plate antenna arrangement, patch antenna arrangement) with a ground plate and a spotlight, which in one Distance arranged essentially parallel to the ground plate is and conductively connected to one of its end regions is, at a first resonance frequency of the antenna arrangement at the connection of the spotlight to the ground plate there is a voltage minimum and in the area of the other end (free end) of the radiator a first Voltage maximum is present.
  • Integrated antennas for mobile telephones are known based on the principle of the patch antenna.
  • the external dimensions of such an antenna module are in existing Applications minimized, for example, that a folded structure (e.g. C-Patch) is used.
  • a folded structure e.g. C-Patch
  • other structures are also known that operate in two defined frequency bands (e.g. in the two cellular bands of the GSM 900 and GSM 1800 standards) enable.
  • two separate ones Spotlights used or it is taken through appropriate measures achieved that at the higher operating frequency only a certain one Spotlight part is used.
  • These practices have the disadvantage that especially at the higher frequency not the total available antenna volume is being used. This results in a small bandwidth the antenna.
  • the invention has for its object an arrangement of trained in such a way that they for two Frequency ranges is suitable and a broadband construction allowed.
  • An advantage of the invention is that in both frequency ranges the entire radiator shines. This is a relatively large bandwidth even at the higher frequency possible because a large spotlight area is available. Even at the lower frequency there is an advantage because here, too, the total available for the antenna Area can be used as a spotlight.
  • the capacitance value and the connection of the capacitive coupling selected in such a way that the second resonance frequency is at least roughly Approximation corresponds to twice the first resonance frequency.
  • the suitability for operation in the belts is advantageous 900/1800 MHz or 900/1900 MHz.
  • the capacitance value and the further digit is chosen such that the first Resonance frequency is reduced less than the second Resonance frequency.
  • the above is other point of the radiator with which the capacitive coupling occurs, near the first voltage maximum on the Radiator at the second resonance frequency. Is an advantage a particularly strong reduction in the second resonance frequency with a slight reduction in the first resonance frequency.
  • the above is other place about 1/3 of the developed length of the Spotlight, measured from the connection to the ground plate. In many cases this is a favorable design.
  • the radiator has at least partially approximates the shape of a C on, under Inclusion of an approximately C-shaped shape with a non-circular, angular shape. This has proven to be beneficial.
  • the shape of the Spotlight chosen such that the free end of the spotlight a spot of the radiator that the desired other connection corresponds to the capacity is adjacent.
  • Advantageous are the short connecting lines that are possible as a result for the capacitor.
  • the is capacitive Coupling formed by a metal strip that is interposed of dielectric material part of the length of the free end area and part of the radiator on the other location provided for capacitive coupling covered, such that the capacitive coupling by a Series connection of two capacitors is formed.
  • Advantageous is the simple and space-saving design.
  • the invention also relates to a handheld radio, including inclusion transceivers, for at least one of the purposes: Voice transmission, data transmission, image transmission, with an antenna, which is characterized in that the antenna by the antenna arrangement according to one of the claims is formed, which are essentially discussed above.
  • a handheld radio including inclusion transceivers, for at least one of the purposes: Voice transmission, data transmission, image transmission, with an antenna, which is characterized in that the antenna by the antenna arrangement according to one of the claims is formed, which are essentially discussed above.
  • the invention also relates to the use of an antenna arrangement and an embodiment of a handheld radio, such as discussed above. According to the invention, only the second (higher) resonance frequency of the antenna arrangement in the Operation used. This can have inventory advantages result if only the higher frequency band is needed, however two-band antennas according to the invention are available.
  • the antenna arrangement 1 has a ground plate 2 on. This is just in the example. At a distance from the Ground plate 2 is a radiator 3 on most of it Length arranged parallel to the ground plate 2 and by suitable means not shown at a constant distance from the Earth plate 2 held. These funds are at a first Embodiment that was realized in Fig. 1, some arranged between the radiator 3 and the ground plate 2 Spacers made of insulating material. Another one Embodiment are the means mentioned between the radiator 3 and the ground plate 2 arranged plate dielectric material. The radiator 3 is multiple in total angled.
  • Section 3a short circuit plate
  • Section 3a is included Section 3b of the radiator 3, perpendicular to it Section 3b is followed by section 3c parallel to a longitudinal edge of the rectangular one in the example Ground plate 2 runs parallel to the section on this 3b running a section 3d, and to the section 3d closes at a distance from section 3c and in parallel a section 3e extends to this.
  • the sections 3b to 3d form approximately the overall shape of a Letter C.
  • section 3e In the embodiment is also at the end of the section 3e, which is close to the short circuit plate 3a lies, another section 3f arranged, which is much denser section 3b lies than section 3d and extends into the vicinity of section 3c.
  • the sections 3b to 3f form a flat, angular, spiral-like Arrangement.
  • the antenna shown can also be used as a flat antenna, Plate antenna or patch antenna.
  • the entire radiator 3 with the sections 3a to 3f is in one piece in one embodiment of the invention made from a thin sheet of metal by punching and bending.
  • the radiator as metallization on the top and an edge surface of the above insulating plate made of dielectric Material applied.
  • the radiator 3 is supplied in the case of transmission and reception via a feed line 5, which is at a distance from the Short circuit plate 3a arranged and with the radiator 3 (in Example the section 3b) is connected, the distance is chosen so that there is a desired characteristic impedance for the feed results. Because a relatively low wave resistance is generally desired (order of magnitude 50 Ohm), is the feed line 5 compared to the entire developed length of the radiator 3 relatively close the short circuit plate 3a. At that of the short circuit plate 3a End region 6 facing away, in the example exactly at the free end the radiator 3, more precisely from its section 3f, on the one hand, and on one, exactly opposite in the exemplary embodiment lying, point 7 of section 3c on the other hand is a Capacitor 8 connected.
  • the height h corresponding to the length of the short-circuit plate 3a, in which the majority of the radiator 3 is above the ground plate 2 is small compared to a quarter of the Wavelength of the high frequency with which the antenna arrangement 1 is to be operated.
  • the above-mentioned low-resistance supply of the feed line 5 is symbolized in Figure 1 by a coaxial cable 9, the is brought up from below to the ground plate 2.
  • the outer conductor of the coaxial cable 9 stands with the conductive visible Surface of the ground plate 2 in connection, and the The center conductor of the coaxial cable 9 is connected to the feed line 5 in connection.
  • the coaxial cable 9 is common may be much shorter than shown or it may be the coaxial cable is completely eliminated because the the electronic circuit to be connected to the antenna arrangement 1 in embodiments of the invention immediately below the mass plate 2 is located.
  • the invention is the ground plate 2 by the largely continuous metallization of a printed circuit board formed on the underside of the circuit components a printed circuit.
  • the one Antenna according to Figure 1 is based.
  • the vertical axis gives that basic course of the voltage or field strength during supply the antenna arrangement with high frequency at two different Frequencies.
  • Curve 10 in FIG. 2 shows the voltage curve at Feeding the antenna arrangement without a capacitor with the first, lowest resonance frequency of the emitter 3, which then is present when a quarter of the wavelength of the effective Length of the radiator 3 including the short circuit plate corresponds.
  • an insulating plate (as a spacer or carrier of the radiator) is neglected in these explanations become.
  • the next higher resonance frequency then arises, if at the end at 6 again when increasing the feed frequency a maximum occurs. This is the case if the length 1 of the emitter 3 has a value of 3/4 of the wavelength of the corresponds to the feeding high frequency. This second-mentioned resonance frequency occurs in one compared to the former Resonance frequency by a factor of 3 higher frequency.
  • Such an arrangement (without a capacitor) is unusable, if it is to be used, a portable one with electromagnetic Transceivers working in waves
  • the should work in two frequency ranges which are in their Distinguish frequency strongly (but not by a factor of 3), which e.g. its frequency is roughly a factor of 2 differentiate.
  • Such frequency ranges are for so-called GSM radiotelephones are common, where a lower frequency range (Devices according to the GSM 900 standard) roughly at 900 MHz, and a next higher frequency range (device standard GSM 1800) at roughly 1800 MHz.
  • the antenna arrangement mentioned can therefore, if the properties according to Figure 2 has, not in resonance with both mentioned Frequencies are operated.
  • Fig. 1 makes one Two-band operation (dual band) possible.
  • the antenna arrangements mentioned are like this narrowband that even with such radio phones that are exclusive work according to the GSM900 standard and for those the transmission mode and the reception mode in by a frequency gap separate bands are made for sending and receiving each with a circuit provided at the feed point a vote must be taken.
  • this Problem does not address the present invention and this problem is not necessarily caused by solved the invention.
  • the invention makes switching specifically for one Switch between two frequency bands (e.g. as described between 900 MHz and 1800 MHz) unnecessarily in the area of the antenna.
  • a single feed line 5 is used for the feed.
  • connection point 7 of the capacitor 8 is about with a developed length of one third of the total length the radiator 3 lies.
  • the other connection of the capacitor 8 is, as already said, with the free end of the Radiator 3 connected.
  • the capacitor 8 is thus between two places of the radiator 3 connected, where the voltages when operating with the low resonance frequency differ relatively little (read from curve 10 in FIG. 2), in particular are far less than half of the Voltage at the free end of the radiator 3. This is relatively low Voltage drives a capacitive current through the capacitor 8 and influences in the sense of a frequency reduction this lower resonance frequency (curve 10) of the antenna arrangement 1 compared to the state without capacitor 8 relatively few.
  • the antenna arrangement 1 is in operation at the higher resonant frequency the capacitor 8 without any Switching measures now between two points (the same Points 6 and 7 as before), between which a relative there is a large voltage difference, which is far greater than the voltage at the free end of the radiator 3. It gives can be easily recognized here by the eye from FIG. 2, that a voltage is present at the capacitor 8 that is double the voltage at the free end of the radiator 3. In the higher resonance frequency is the effect of the capacitor 8 in the sense of a frequency reduction or antenna extension much stronger than at the lower resonance frequency.
  • the lower resonance frequency is something in the sense of a Antenna extension (frequency reduction) influenced the length compared to the case without a capacitor 1 make it slightly shorter, so the slight frequency reduction then the lower resonance frequency the desired resonance frequency, in the example to the resonance frequency leads in the area of the GSM 900.
  • the higher resonance frequency becomes very high much more reduced so that with appropriate selection of the Size of the capacitor 8 this higher resonance frequency value required for GSM 1800.
  • the general teaching for connecting the capacitor 8 is that this is connected to the radiator is supposed to influence the higher resonance frequency more (namely reduced) than the low one. Is more special the doctrine that the connection of the capacitor is such is that the voltage acting on it at the higher resonance frequency is higher than at the lower resonance frequency. In the special case, the capacitor 8 is approximately there connected where the two at the second resonance frequency opposite phase maxima of the voltage curve.
  • GSM 1900 there is currently another GSM standard exists that works at an even higher frequency, at around 1900 MHz (GSM 1900). This too Frequency falls within the scope of the very different, in particular very roughly twice the frequency of the first resonance frequency and can thus also be realized by the invention.
  • the frequency ranges for GSM 900 are around 880 to 960 MHz, for GSM 1800 at around 1710 to 1880 MHz, for GSM 1900 at around 1850 to 1990 MHz.
  • S 11 is the reflection factor measured at the entry point.
  • the reflection factor is considerably lower than at other frequencies, because at these resonance frequencies the antenna radiates a large part of the high-frequency power fed in.
  • the frequency f2 has three times the value of the frequency f1.
  • Figure 4 shows the state as it results from the capacitor 8.
  • the frequency f'1. has decreased only slightly compared to f1 and therefore has approximately the value f1, the higher resonance frequency f'2 has decreased considerably compared to f2 in FIG. 3.
  • the five radiator sections provided in the arrangement according to FIG. 1 3b to 3f form approximately the top view Shape of the small letter "e". For this arrangement hence the name e-patch suggested.
  • the antenna arrangement 1 is designed such that it has a limited available space with as much as possible High frequency leading radiator surface fills.
  • the section following section 3e also serves 3f, to the developed spot length 1 (which is somewhat is smaller than the individual along the respective center line Sections measured) and because of its proximity to the Section 3c a practical connection option for the Capacitor 8 offers.
  • the radiator 3 is a ⁇ / 4 radiator, the acts Spotlight 3 over its entire length as spotlight. This is but also the case with the higher resonance frequency.
  • the radiator 3 radiates with all its sections 3a to 3f, not just with a shorter length. This is an important advantage because it also helps with the higher Resonance frequency the antenna arrangement relatively broadband is.
  • a switchable one can be used Adaptation of the antenna may be necessary to the antenna arrangement optimally on the reception range of GSM 1800 on the one hand and on the other hand, the range of GSM 1800 adapt. It is understood that these embodiments are also to be used immediately if the antenna is dimensioned for GSM 1800 instead of for GSM 1900, or if other standards, such as AMPS, are applied.
  • An embodiment of an antenna arrangement is preferred 1 '(Fig. 5), in which the capacitor 8 by a sheet metal strip 20 approximately formed by the width of the section 3f that is about the gap between the free end at 6 and section 3c with sufficient overlap of the two adjacent sections 3c and 3f is placed and with an intermediate layer of dielectric material (plastic film 22, see Fig. 5a) connected to these parts at a defined distance is.
  • dielectric material plastic film 22, see Fig. 5a
  • Variables in the optimal dimensioning of the antenna are in particular the capacitance value of the capacitor 8 and the Junction 7.
  • the To connect the capacitor at a point in section 3c for which the value d of Figure 2 is slightly larger than the length 1/3 because with such an increase in the distance of the ground plate at the higher resonance frequency
  • the corresponding voltage of curve 10 lower frequency range
  • FIG. 5 shows a partial representation in a simple representation broken open handheld radio 15, namely a mobile radio telephone, the antenna arrangement as described above 1 'contains.
  • the capacitor is through a over parts 3c and 3f with the interposition of an insulating layer laid sheet metal strip 20 as a series connection realized by two capacities.
  • the short circuit plate 3a is located towards the upper end of the radio telephone housing.
  • the handheld radio is in the example for the areas GSM 900 and GSM 1800 designed.
  • the antenna arrangement is completely housed inside the housing of the radio telephone, it is therefore an integrated antenna.
  • the spotlight takes up a space of around 5 cm x 4 cm x 0.5 cm (the latter is the length of the short circuit plate) on.
  • the low space consumption allows dimensioning for the widest possible range.
  • the antenna array is powered for both frequency bands at the same switching point, namely at the connection point of the feed line 5 with the Spotlight 3, is done.
EP01440125A 2000-05-08 2001-05-04 Antenne intégrée pour téléphones portables Expired - Lifetime EP1154518B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10022107A DE10022107A1 (de) 2000-05-08 2000-05-08 Integrierte Antenne für Mobilfunktelefone
DE10022107 2000-05-08

Publications (3)

Publication Number Publication Date
EP1154518A2 true EP1154518A2 (fr) 2001-11-14
EP1154518A3 EP1154518A3 (fr) 2002-08-28
EP1154518B1 EP1154518B1 (fr) 2006-03-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01440125A Expired - Lifetime EP1154518B1 (fr) 2000-05-08 2001-05-04 Antenne intégrée pour téléphones portables

Country Status (7)

Country Link
US (1) US6473044B2 (fr)
EP (1) EP1154518B1 (fr)
JP (1) JP4823433B2 (fr)
AT (1) ATE320088T1 (fr)
AU (1) AU4205101A (fr)
DE (2) DE10022107A1 (fr)
HU (1) HUP0101658A3 (fr)

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WO2004062032A1 (fr) * 2002-12-17 2004-07-22 Sony Ericsson Mobile Communications Ab Antennes planes a frequences de resonance multiples
US6980154B2 (en) 2003-10-23 2005-12-27 Sony Ericsson Mobile Communications Ab Planar inverted F antennas including current nulls between feed and ground couplings and related communications devices
WO2007045665A1 (fr) * 2005-10-18 2007-04-26 Palm, Inc. Unite d'antenne a resonance multiple, circuit imprime correspondant et appareil de radiocommunication
WO2008078437A1 (fr) 2006-12-22 2008-07-03 Murata Manufacturing Co., Ltd. Structure d'antenne et appareil de communication sans fil doté de cette structure d'antenne
EP2169766A1 (fr) * 2008-09-30 2010-03-31 Fujitsu Ltd. Antenne et dispositif de lecture/écriture
WO2011101714A1 (fr) * 2010-02-19 2011-08-25 Sony Ericsson Mobile Communications Ab Bornes et systèmes d'antenne avec une ligne rayonnante primaire excitée capacitivement par une ligne rayonnante secondaire
US8108021B2 (en) 2010-05-27 2012-01-31 Sony Ericsson Mobile Communications Ab Communications structures including antennas with filters between antenna elements and ground sheets
US8456366B2 (en) 2010-04-26 2013-06-04 Sony Corporation Communications structures including antennas with separate antenna branches coupled to feed and ground conductors
FR3026895A1 (fr) * 2014-10-06 2016-04-08 Renault Sa Antenne plane a element rayonnant en spirale

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GB2366453A (en) * 2000-08-31 2002-03-06 Nokia Mobile Phones Ltd An antenna device for a communication terminal
TW490885B (en) * 2001-05-25 2002-06-11 Chi Mei Comm Systems Inc Broadband dual-band antenna
TW529779U (en) * 2001-10-26 2003-04-21 Hon Hai Prec Ind Co Ltd Multi-frequency antenna
US6577277B1 (en) * 2001-12-21 2003-06-10 Hon Hai Precision Ind. Co., Ltd. Dual band antenna
JP2004128605A (ja) * 2002-09-30 2004-04-22 Murata Mfg Co Ltd アンテナ構造およびそれを備えた通信装置
KR100693416B1 (ko) * 2004-09-24 2007-03-12 엘지전자 주식회사 문자 패턴 안테나
JP4529786B2 (ja) * 2005-04-28 2010-08-25 株式会社日立製作所 信号処理回路、及びこれを用いた非接触ｉｃカード並びにタグ
DE102005038196A1 (de) * 2005-08-12 2007-02-22 Hirschmann Car Communication Gmbh Flachbauende Mobilfunkantenne für ein Fahrzeug
JP4858860B2 (ja) * 2007-10-10 2012-01-18 日立金属株式会社 マルチバンドアンテナ
JP5133186B2 (ja) * 2008-09-30 2013-01-30 株式会社フジクラ アンテナ
CN102683837B (zh) * 2012-05-14 2014-04-16 天津大学 基于复合左/右手传输线的双频微带贴片天线
JP6451865B2 (ja) * 2015-10-14 2019-01-16 株式会社村田製作所 アンテナ装置

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004062032A1 (fr) * 2002-12-17 2004-07-22 Sony Ericsson Mobile Communications Ab Antennes planes a frequences de resonance multiples
US6903686B2 (en) 2002-12-17 2005-06-07 Sony Ericsson Mobile Communications Ab Multi-branch planar antennas having multiple resonant frequency bands and wireless terminals incorporating the same
US6980154B2 (en) 2003-10-23 2005-12-27 Sony Ericsson Mobile Communications Ab Planar inverted F antennas including current nulls between feed and ground couplings and related communications devices
WO2007045665A1 (fr) * 2005-10-18 2007-04-26 Palm, Inc. Unite d'antenne a resonance multiple, circuit imprime correspondant et appareil de radiocommunication
US8816911B2 (en) 2005-10-18 2014-08-26 Qualcomm Incorporated Multiple resonant antenna unit, associated printed circuit board and radio communication
EP2093831A4 (fr) * 2006-12-22 2010-03-03 Murata Manufacturing Co Structure d'antenne et appareil de communication sans fil doté de cette structure d'antenne
EP2093831A1 (fr) * 2006-12-22 2009-08-26 Murata Manufacturing Co. Ltd. Structure d'antenne et appareil de communication sans fil doté de cette structure d'antenne
US8098211B2 (en) 2006-12-22 2012-01-17 Murata Manufacturing Co., Ltd. Antenna structure and radio communication apparatus including the same
WO2008078437A1 (fr) 2006-12-22 2008-07-03 Murata Manufacturing Co., Ltd. Structure d'antenne et appareil de communication sans fil doté de cette structure d'antenne
EP2169766A1 (fr) * 2008-09-30 2010-03-31 Fujitsu Ltd. Antenne et dispositif de lecture/écriture
US8215561B2 (en) 2008-09-30 2012-07-10 Fujitsu Limited Antenna and reader/writer device
WO2011101714A1 (fr) * 2010-02-19 2011-08-25 Sony Ericsson Mobile Communications Ab Bornes et systèmes d'antenne avec une ligne rayonnante primaire excitée capacitivement par une ligne rayonnante secondaire
US8456366B2 (en) 2010-04-26 2013-06-04 Sony Corporation Communications structures including antennas with separate antenna branches coupled to feed and ground conductors
US8108021B2 (en) 2010-05-27 2012-01-31 Sony Ericsson Mobile Communications Ab Communications structures including antennas with filters between antenna elements and ground sheets
FR3026895A1 (fr) * 2014-10-06 2016-04-08 Renault Sa Antenne plane a element rayonnant en spirale

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HU0101658D0 (en) 2001-06-28
JP2002009539A (ja) 2002-01-11
US6473044B2 (en) 2002-10-29
HUP0101658A3 (en) 2002-09-30
DE10022107A1 (de) 2001-11-15
DE50109152D1 (de) 2006-05-04
ATE320088T1 (de) 2006-03-15
AU4205101A (en) 2001-11-15
EP1154518A3 (fr) 2002-08-28
US20020005809A1 (en) 2002-01-17
EP1154518B1 (fr) 2006-03-08
HUP0101658A2 (hu) 2002-01-28
JP4823433B2 (ja) 2011-11-24

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