EP1168495A2 - Dispositif d'antenne pour téléphones mobiles - Google Patents

Dispositif d'antenne pour téléphones mobiles Download PDF

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Publication number
EP1168495A2
EP1168495A2 EP01440162A EP01440162A EP1168495A2 EP 1168495 A2 EP1168495 A2 EP 1168495A2 EP 01440162 A EP01440162 A EP 01440162A EP 01440162 A EP01440162 A EP 01440162A EP 1168495 A2 EP1168495 A2 EP 1168495A2
Authority
EP
European Patent Office
Prior art keywords
radiator
antenna arrangement
resonance frequency
ground plate
antenna
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.)
Withdrawn
Application number
EP01440162A
Other languages
German (de)
English (en)
Other versions
EP1168495A3 (fr
Inventor
Achim Bahr
Dirk Manteuffel
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 EP1168495A2 publication Critical patent/EP1168495A2/fr
Publication of EP1168495A3 publication Critical patent/EP1168495A3/fr
Withdrawn legal-status Critical Current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
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • 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
    • H01Q5/314—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
    • H01Q5/328—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 between a radiating element and ground
    • 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
    • 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
    • H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means

Definitions

  • the invention relates to an antenna arrangement (flat antenna arrangement, plate antenna arrangement, patch antenna arrangement) with a ground plate and a radiator, which is arranged at a distance essentially parallel to the ground plate and is conductively connected to one of its end regions, with the antenna arrangement at a first resonant frequency
  • an antenna arrangement flat antenna arrangement, plate antenna arrangement, patch antenna arrangement
  • the radiator is connected to the ground plate, there is a voltage minimum and in the area of the other end (free end) of the radiator there is a first voltage maximum.
  • Integrated antennas for mobile radio telephones are known, which are based on the principle of the patch antenna.
  • the external dimensions of such an antenna module are minimized, for example, by using a folded structure (for example a C patch).
  • other structures which enable operation in two defined frequency bands (such as, for example, in the two mobile radio bands of the GSM 900 and GSM 1800 standards). Either two separate emitters are used here, or suitable measures are used to ensure that only one specific emitter part is used at the higher operating frequency. These practices have the disadvantage that the entire available antenna volume is not used, in particular at the higher frequency. This results in a small bandwidth of the antenna.
  • the invention has for its object to design an arrangement of the type mentioned in such a way that it is suitable for two frequency ranges and allows a broadband construction.
  • a controllable switch element is arranged near the free end of the radiator between the radiator and the ground plate, which is designed such that it is able to produce a connection with low resistance, and that the point at which the switch element is connected to the radiator is arranged in such a way that when the switch element is conductively controlled, the radiator has a desired second resonance frequency that is higher than the first resonance frequency.
  • An advantage of the invention is that the entire or almost the entire radiator radiates in both frequency ranges. This enables a relatively large bandwidth even at the higher frequency because a large radiator area is available. There is also an advantage at the lower frequency, because here too the entire area available for the antenna can be used as a radiator. A single point of the radiator can be used for the supply.
  • the switch element is arranged in such a way that the second resonance frequency corresponds to approximately twice the first resonance frequency.
  • This ratio of the resonance frequencies is well suited for the implementation of a cell phone for two-band operation, for example in the range of GSM900 / GSM1800 or
  • the radiator essentially has the configuration of a C, including an approximately C-shaped shape with a non-round, angular shape. This has proven to be beneficial.
  • the object of designing such an arrangement in such a way that it is suitable for two frequency ranges and allows a broadband construction is achieved according to the characterizing part of patent claim 4 in that the radiator essentially has the shape of a meander or more successive, zigzag-shaped conductor sections has that at a further, higher resonance frequency there is a voltage minimum or a second voltage maximum at the ends of the radiator mentioned, and that such a location of the radiator is capacitively coupled to the ground plate that opposes the further resonance frequency is reduced to three times the value of the first resonance frequency.
  • the radiator has an essentially S-like shape, in which three sections extend approximately in the transverse direction of a rectangular surface surrounding the radiator, two sections each being connected by a total of two connecting sections are. This is a special configuration.
  • the capacitance value and said location of the radiator are selected such that the first resonance frequency is reduced less than the second resonance frequency.
  • the capacitance value and the connection of the capacitive coupling are selected such that the second resonance frequency corresponds at least roughly to twice the first resonance frequency.
  • the suitability for operation in the 900/1800 MHz or 900/1900 MHz bands is advantageous.
  • said other point of the radiator, with which the capacitive coupling takes place is in the vicinity of the first voltage maximum on the radiator at the second resonance frequency.
  • said other point is approximately 1/3 of the unwound length of the radiator, measured from the connection to the ground plate. In many cases this is a favorable design.
  • the invention also relates to a hand-held radio, including transceivers, for at least one of the purposes: voice transmission, data transmission, image transmission, with an antenna, which is characterized in that the antenna is formed by the antenna arrangement according to one of the claims, which is essentially as above are discussed.
  • the advantage is that a small design for the device is possible.
  • the invention also relates to the use of an antenna arrangement and an embodiment of a handheld radio, as discussed above. According to the invention, only the second (higher) resonance frequency of the antenna arrangement is used during operation. This can result in storage advantages if only the higher frequency band is required, but two-band antennas according to the invention are available.
  • the antenna arrangement 1 has a ground plate 2. This is just in the example. At a distance from the ground plate 2, a radiator 3 is arranged for most of its length parallel to the ground plate 2 and kept at a constant distance from the ground plate 2 by suitable means, not shown.
  • these means are some spacers made of insulating material arranged between the radiator 3 and the ground plate 2.
  • the means called a plate made of dielectric material arranged between the radiator 3 and the ground plate 2.
  • the radiator 3 is angled several times in total.
  • One end of the part of the radiator 3 which runs parallel to the ground plate 2 is conductively connected to the ground plate 2 over its entire width by a section 3a (short-circuit plate) which extends at right angles to the ground plate 2.
  • a section 3b of the radiator 3 adjoins the section 3a
  • a section 3c adjoins the section 3b, which runs parallel to a longitudinal edge of the rectangular mass plate 2 in the example, and extends parallel to the section 3b to the section 3b Section 3d
  • section 3d adjoins a section 3e at a distance from and parallel to section 3c.
  • the sections 3b to 3d form approximately the overall shape of a letter C.
  • the free end of the section 3e is close to the short-circuit plate 3a.
  • Sections 3b to 3e form a flat, angular, spiral-like arrangement.
  • the antenna shown can also be referred to as a flat antenna, plate antenna or patch antenna.
  • the entire radiator 3 with the above-mentioned sections 3a to 3e is made in one piece from a thin metal sheet by stamping and bending.
  • the radiator is applied as a metallization on the top and an edge surface of the above-mentioned insulating plate made of dielectric material.
  • the radiator 3 is fed via a feed line 5, which is arranged at a distance from the short-circuiting plate 3a and is connected to the radiator 3 (in the example, section 3b), the distance being chosen such that a desired wave resistance for the supply results. Since a relatively low characteristic impedance is generally desired (order of 50 Ohm), the feed line 5 is relatively close to the short-circuit plate 3a compared to the total length of the radiator 3.
  • the height h corresponding to the length of the short-circuit plate 3a, at which the majority of the radiator 3 is located 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-impedance supply of the feed line 5 is symbolized in FIG. 1 by a coaxial cable 9 which is brought up to the ground plate 2 from below.
  • the outer conductor of the coaxial cable 9 is connected to the conductive, visible surface of the ground plate 2, and the central conductor of the coaxial cable 9 is connected to the feed line 5.
  • the coaxial cable 9 will often be much shorter than shown or the coaxial cable may possibly be omitted entirely because the electronic circuit to be connected to the antenna arrangement 1 is located directly below the ground plate 2 in embodiments of the invention.
  • the ground plate 2 is formed by the largely continuous metallization of a printed circuit board, on the underside of which the circuit components of a printed circuit are located.
  • the radiator 3 insofar as the antenna arrangement has been described so far, has a first resonance frequency at which the length 1 of the radiator corresponds to a quarter of the wavelength.
  • the dielectric constant of an insulating plate mentioned above are not dealt with here.
  • a controllable (in the example electronic) switch arrangement 11 is switched between a point 10 on the radiator 3 and a closely adjacent point 12 on the ground plate 2 a locked state in which it does not allow radio frequency to pass, and a "conductive" state in which it allows radio frequency to pass. The latter state does not have to indicate a direct current connection.
  • Point 10 is located near the free end of radiator 3. In the example, point 10 is at the free end of section 3e.
  • a control connection of the switch element shown is designated by the reference symbol S.
  • the free end of the radiator is practically short-circuited to ground, and the radiator is thus in resonance at a higher resonance frequency f 2 , at which the radiator length corresponds to half the wavelength.
  • the frequencies of the lower and the second (higher) resonance frequency behave approximately as 1: 2.
  • a precise setting of the upper resonance frequency may require positioning the switch element at a short distance from the end of the radiator. According to the invention, this distance is small, however, in order to use the entire available radiator surface even at the higher resonance frequency.
  • the antenna arrangement at the higher resonance frequency mentioned can be regarded as a loop antenna or loop antenna, in which the loop through the radiator, the ground plate located below it and the two conductive connections between the radiator and the ground plate is formed at both ends of the radiator.
  • any suitable switch element can be used as the electronic switch element.
  • a pin diode or a transistor is provided.
  • the switch element When selecting the switch element, the voltage prevailing on the non-conductive switch element and the current flowing through it when the switch element is conductive are to be taken into account.
  • the electronic elements mentioned still require a circuit which may have capacitors, resistors and a high-frequency choke and which is known per se to the person skilled in the art.
  • an antenna arrangement 41 has a ground plate 42, on which a plastic plate 60 is arranged, which carries a metallization 62.
  • the radiator is made in one piece from a thin metal sheet by stamping and bending.
  • the distance between the spotlight and the ground plate is ensured by individual spacers made of insulating material.
  • the radiator 43 is fed via a feed line 45, which is at a distance from the short-circuit plate 43a and connected to the radiator 43 (in the example, section 43b), the distance being selected such that a desired characteristic impedance for the supply results. Since a relatively low characteristic impedance is generally desired (order of magnitude 50 ohms), the feed line 45 is relatively close to the short-circuit plate 43a compared to the total length of the radiator 43.
  • the height h corresponding to the length of the short-circuit plate 43a, at which the majority of the radiator 43 is located above the ground plate 42, is small compared to a quarter of the wavelength of the high frequency with which the antenna arrangement 41 is to be operated.
  • the above-mentioned low-impedance supply of the supply line 45 is symbolized in FIG. 2 by a coaxial cable 49, which is led from below to the ground plate 42.
  • the outer conductor of the coaxial cable 49 is connected to the conductive visible surface of the ground plate 42, and the central conductor of the coaxial cable 49 is connected to the feed line 45.
  • the configuration of the radiator 43 has essentially the shape of an S or a meander.
  • the part of the radiator 43 which adjoins the short-circuit plate 43a consists of a wide, long region 43b, which is adjoined by a short, narrow region 43c, which is again followed by a long, broad region 43d, and this is followed by a short, narrow region 43e and finally long wide area 43f.
  • the regions 43b, 43d and 43f are each of the same size, and the regions 43c and 43e are also identical to one another.
  • the meander shape is formed by two slots 44 which penetrate a rectangle from two sides. The wide areas each have a low inductance per unit length, while the narrow areas have a larger inductance per unit length.
  • the developed length 1 of the radiator measured from the connection point between the short-circuit plate 43a and the ground plate 42 to the free end, corresponds to approximately a quarter wavelength at this lower resonance frequency.
  • the developed length is somewhat shorter than the length that results when you measure the length exactly in the middle of the individual sections of the radiator.
  • the radiator is at ⁇ / 4 resonance at a lower resonance frequency, but the measured length of the radiator can only be brought into consideration at the lower resonance frequency in consideration of the dielectric constant of the plastic plate in accordance with the stated length ⁇ / 4.
  • operation of the antenna arrangement in different frequency bands is possible.
  • the arrangement has a first resonance frequency at which the length of the radiator corresponds to approximately a quarter of the wavelength and one next higher resonance frequency at which the length of the radiator corresponds to 3/4 of the wavelength of the higher resonance frequency.
  • FIG. 3 This is shown in FIG. 3.
  • a capacitor 65 is now switched on between a point 47 on the radiator 43, which is approximately 1/3 of the radiator length away from the connection between the short-circuit plate 43a and the ground plate 42, and the ground plate.
  • this capacitor which is permanently connected to the circuit, that is to say cannot be switched, has a lower voltage in the case of the ⁇ / 4 resonance than in the case of the 3/4- ⁇ resonance, if one assumes the same high-frequency amplitude in both cases.
  • This capacitor therefore influences the antenna arrangement less at the low resonance frequency than at the higher resonance frequency.
  • This arrangement is therefore suitable for changing the originally existing frequency ratio 1: 3 between the two resonance frequencies, so that, for example, as in the case just mentioned for GSM radio telephones, a ratio of approximately 1: 2 results.
  • the low capacitive load which is also brought about at the low resonance frequency can be taken into account in the design of the antenna arrangement by making the entire radiator somewhat shorter from the start than would be the case without the presence of the capacitor at the low resonance frequency.
  • a capacitor 69 is also connected to the free end of the radiator 43 between it and the ground plate.
  • the capacitor 69 is also effective at the lower resonance frequency or when operating in the lower frequency band (GSM900 in the example above). Care must be taken here that the capacitor is chosen to be so small in terms of its capacitance value that excessive currents do not flow during operation of the low frequency band, which could reduce the lower resonance frequency of the antenna arrangement in a disruptive manner.
  • the connections for the capacitors 65 and 69 are provided in the area of the same edge of the radiator 43 or the plastic plate 60.
  • the size of the capacitor at the free end of the radiator 43 is dimensioned such that at the higher resonance frequency a certain high-frequency current flows through this capacitor, so that the part of the radiator adjacent to the free end contributes to the emission of high frequency and reception. If the free end were actually left completely free, the high-frequency currents flowing in its vicinity would possibly be very much smaller (depending on the specific construction and operating details), so that in this end region the radiator is hardly effective when operating in the region of the higher resonance frequency would. This would result in less radiator surface being effective at or near the higher resonance frequency, and this could undesirably reduce the bandwidth of the antenna arrangement.
  • the widest possible range is e.g. desirable because the radiation of the antenna could be influenced by a hand holding the mobile phone.
  • the sending and receiving on one band does not take place on the same frequency, but in two subbands that are separated from each other by a gap, whereby at least the goal should be achieved that within the transmitting band on the one hand and within the receiving band on the other hand, such a wide bandwidth is available that with as few switching operations as possible depending on the transmission frequency actually used and correspondingly depending on the respective reception frequency.
  • Different adjustments are necessary for the transmission band on the one hand and the reception band on the other hand because the bandwidth for these two operating modes is insufficient overall.
  • the invention does not change this, however, it does provide a construction that is within the transmission band on the one hand and within the reception band on the other hand is relatively broadband.
  • the distance between the connection of the capacitor 65 on the radiator and the capacitor 69 on the radiator is approximately ⁇ / 2 at the higher resonance frequency. The linear distance between these two connections is much shorter.
  • the meandering or S-shaped configuration of the radiator also has the advantage that both the capacitor 65 and the capacitor 69 can be connected to the radiator 43 near an edge of the top of the plastic plate 60.
  • FIG. 4 shows a simple illustration of a partially broken open handheld radio 90, namely a mobile radio telephone, which contains the antenna arrangement 1 of FIG. 1 described above as the antenna.
  • the short-circuiting plate 3a is arranged towards the upper end of the housing of the radio telephone.
  • the handheld radio is designed for the areas GSM900 and GSM1800.
  • the antenna arrangement is completely housed inside the housing of the radio telephone, so it is an integrated antenna.
  • FIG. 5 shows a simple illustration of a partially broken open handheld radio 95, namely a mobile radio telephone which contains the antenna arrangement 41 of FIG. 2 described above as the antenna.
  • the short circuit plate 43a is arranged toward the upper end of the housing of the radio telephone.
  • the handheld radio is in the example for the areas GSM900 and GSM1800.
  • the antenna arrangement is completely housed inside the housing of the radio telephone, so it is an integrated antenna.
  • the radiator occupies a space of approximately 5 cm ⁇ 4 cm ⁇ 0.5 cm (the latter is the length of the short-circuit plate).
  • the antenna arrangement for both frequency bands is supplied at the same circuit point, namely at the connection point of the supply line 5 or 45 with the radiator.
  • the frequency ranges for GSM900 are around 880 to 960 MHz, for GSM1800 around 1710 to 1880 MHz, for GSM1900 around 1850 to 1990 MHz.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)
  • Support Of Aerials (AREA)
  • Transceivers (AREA)
  • Details Of Aerials (AREA)
EP01440162A 2000-06-23 2001-06-08 Dispositif d'antenne pour téléphones mobiles Withdrawn EP1168495A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10029733 2000-06-23
DE10029733A DE10029733A1 (de) 2000-06-23 2000-06-23 Antennenanordnung für Mobilfunktelefone

Publications (2)

Publication Number Publication Date
EP1168495A2 true EP1168495A2 (fr) 2002-01-02
EP1168495A3 EP1168495A3 (fr) 2002-06-26

Family

ID=7645989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01440162A Withdrawn EP1168495A3 (fr) 2000-06-23 2001-06-08 Dispositif d'antenne pour téléphones mobiles

Country Status (6)

Country Link
US (1) US6542126B2 (fr)
EP (1) EP1168495A3 (fr)
JP (1) JP2002043833A (fr)
AU (1) AU5180801A (fr)
DE (1) DE10029733A1 (fr)
HU (1) HUP0102316A3 (fr)

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EP1881554A1 (fr) * 2006-07-07 2008-01-23 LG Electronics Inc. Antenne et un terminal mobile en utilisant la même
WO2009156805A1 (fr) * 2008-06-27 2009-12-30 Toyota Jidosha Kabushiki Kaisha Dispositif d’antenne
WO2010110722A1 (fr) * 2009-03-23 2010-09-30 Laird Technologies Ab Dispositif d'antenne et dispositif de radiocommunication portable contenant ledit dispositif d'antenne
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
EP2466681A3 (fr) * 2010-12-17 2012-07-04 HTC Corporation Dispositif portable et antenne planaire correspondante
US8456366B2 (en) 2010-04-26 2013-06-04 Sony Corporation Communications structures including antennas with separate antenna branches coupled to feed and ground conductors
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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
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WO2007094111A1 (fr) 2006-02-14 2007-08-23 Murata Manufacturing Co., Ltd. structure d'antenne et dispositif de communication radio qui l'emploie
US20120119955A1 (en) * 2008-02-28 2012-05-17 Zlatoljub Milosavljevic Adjustable multiband antenna and methods
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US20100001919A1 (en) * 2008-07-01 2010-01-07 Joymax Electronics Co., Ltd. Antenna device having wave collector
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JP5275369B2 (ja) 2009-08-27 2013-08-28 株式会社東芝 アンテナ装置及び通信装置
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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
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WO2009156805A1 (fr) * 2008-06-27 2009-12-30 Toyota Jidosha Kabushiki Kaisha Dispositif d’antenne
DE112009001584B4 (de) 2008-06-27 2019-09-19 Toyota Jidosha Kabushiki Kaisha Antennenvorrichtung
US9160073B2 (en) 2008-06-27 2015-10-13 Toyota Jidosha Kabushiki Kaisha Antenna device
WO2010110722A1 (fr) * 2009-03-23 2010-09-30 Laird Technologies Ab Dispositif d'antenne et dispositif de radiocommunication portable contenant ledit dispositif d'antenne
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
CN102569990A (zh) * 2010-12-17 2012-07-11 宏达国际电子股份有限公司 手持式装置及其平面天线
US8907851B2 (en) 2010-12-17 2014-12-09 Htc Corporation Handheld device and planar antenna thereof
EP2466681A3 (fr) * 2010-12-17 2012-07-04 HTC Corporation Dispositif portable et antenne planaire correspondante
EP2733784A1 (fr) * 2012-11-19 2014-05-21 Fujitsu Limited Antenne plane en F inverse
US9531063B2 (en) 2012-11-19 2016-12-27 Fujitsu Limited Planar inverted-F antenna

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AU5180801A (en) 2002-01-03
HU0102316D0 (en) 2001-08-28
JP2002043833A (ja) 2002-02-08
HUP0102316A2 (hu) 2002-04-29
EP1168495A3 (fr) 2002-06-26
US6542126B2 (en) 2003-04-01
HUP0102316A3 (en) 2002-10-28
DE10029733A1 (de) 2002-01-03
US20010054979A1 (en) 2001-12-27

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