EP1345282A1 - Eingebaute Mehrband-Planarantenne mit Inverted-L-Haupt- und Parasitär- Antennenelementen - Google Patents

Eingebaute Mehrband-Planarantenne mit Inverted-L-Haupt- und Parasitär- Antennenelementen Download PDF

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Publication number
EP1345282A1
EP1345282A1 EP02005816A EP02005816A EP1345282A1 EP 1345282 A1 EP1345282 A1 EP 1345282A1 EP 02005816 A EP02005816 A EP 02005816A EP 02005816 A EP02005816 A EP 02005816A EP 1345282 A1 EP1345282 A1 EP 1345282A1
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EP
European Patent Office
Prior art keywords
ground substrate
recited
antenna
radiating element
flat
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
EP02005816A
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English (en)
French (fr)
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EP1345282B1 (de
Inventor
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
Application filed by Sony Ericsson Mobile Communications AB filed Critical Sony Ericsson Mobile Communications AB
Priority to AT02005816T priority Critical patent/ATE316295T1/de
Priority to DE60208731T priority patent/DE60208731T2/de
Priority to EP02005816A priority patent/EP1345282B1/de
Priority to TW092102648A priority patent/TWI258246B/zh
Priority to PCT/EP2003/002473 priority patent/WO2003077360A1/en
Priority to US10/507,574 priority patent/US7319432B2/en
Priority to AU2003215654A priority patent/AU2003215654A1/en
Publication of EP1345282A1 publication Critical patent/EP1345282A1/de
Application granted granted Critical
Publication of EP1345282B1 publication Critical patent/EP1345282B1/de
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
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/005—Patch antenna using one or more coplanar parasitic elements
    • 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
    • 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
    • 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
    • H01Q5/385—Two or more parasitic elements
    • 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

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., PCS1900 (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 analog 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 impedances 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.
  • Japanese patent no. 6-37531 discloses a helix which contains an inner parasitic metal rod.
  • the antenna can be tuned to dual resonant frequencies by adjusting the position of the metal rod.
  • the bandwidth for this design is too narrow for use in cellular communications.
  • Dual-band, printed, monopole antennas are known in which dual resonance is achieved by the addition of a parasitic strip in close proximity to a printed monopole antenna. While such an antenna has enough bandwidth for cellular communications, it requires the addition of a parasitic strip.
  • Moteco AB in Sweden has designed a coil matching dual-band whip antenna and coil antenna, in which dual resonance is achieved by adjusting the coil matching component (1/4.lambda. for 900 MHz and 1/2.lambda. for 1800 MHz). This antenna has relatively good bandwidth and radiation performances and a length in the order of 40 mm.
  • PIFA planar inverted-F antennas
  • the PIFA can, as mentioned, be built in into a radio terminal antenna, e.g. a mobile phone, with fairly low profile. However, as mobile phones become smaller and smaller, the height of the PIFA antennas are still a limiting factor for decreasing the terminal size.
  • 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.
  • This is an undesirable modification as the height increase makes the antenna unattractive for small communication devices.
  • One 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 Cross-Connect System), PCS (Personal Communications System) and UMTS frequency ranges.
  • DCS Digital Cross-Connect System
  • PCS Personal Communications System
  • a multi-band radio antenna device for a radio communication terminal comprising a flat ground substrate, a flat main radiating element having a radio signal feeding point, and a flat parasitic element.
  • Said main radiating element is located in the same plane as said ground substrate, wherein a first elongated portion of the main radiating element extends in an L shape away from a side edge of the ground substrate, the longer leg of said L shape extending substantially parallel to said side edge.
  • said first elongated portion has a first width and extends into a second elongated portion having a second width, smaller than said first width.
  • the length of said first portion preferably corresponds to the resonance of a first radio wavelength zone and the combined length of said first and second portion corresponds to the resonance of a second radio wavelength zone, by interaction with the parasitic element.
  • said flat parasitic element comprises a first L-shaped parasitic member extending from an electrical connection point to said ground substrate essentially parallel to said first portion of the main antenna element.
  • said flat parasitic element further comprises a second L-shaped parasitic member extending from an electrical connection point to said ground substrate, essentially parallel to said first parasitic member.
  • the main radiating element is preferably dielectrically separated from the ground substrate.
  • said second portion of the main element is meandered, and preferably, said first width is at least 5 times larger than said second width. In one embodiment, said first width is at least 10 times larger than said second width.
  • a communication terminal devised for multi-band radio communication comprising a housing, a user input and output interface, and in said housing a built-in antenna device including a flat ground substrate, a flat main radiating element having a radio signal feeding point, and a flat parasitic element.
  • Said main radiating element is located in the same plane as said ground substrate, wherein a first elongated portion of the main radiating element extends in an L shape away from a side edge of the ground substrate, the longer leg of said L shape extending substantially parallel to said side edge.
  • said first elongated portion has a first width and extends into a second elongated portion having a second width, smaller than said first width.
  • the length of said first portion preferably corresponds to the resonance of a first radio wavelength and the combined length of said first and second portion corresponds to the resonance of a second radio wavelength.
  • said flat parasitic element comprises a first L-shaped parasitic member extending from an electrical connection point to said ground substrate essentially parallel to said first portion of the main antenna element.
  • said flat parasitic element further comprises a second L-shaped parasitic member extending from an electrical connection point to said ground substrate, essentially parallel to said first parasitic member.
  • the main radiating element is preferably dielectrically separated from the ground substrate.
  • said second portion of the main element is meandered, and preferably, said first width is at least 5 times larger than said second width. In one embodiment, said first width is at least 10 times larger than said second width.
  • a multi-band radio antenna for a radio communication terminal comprising a flat main radiating element having a radio signal feeding point, and a flat parasitic element, wherein said antenna is connectable to a flat ground substrate by interconnection with said parasitic element.
  • Said main radiating element is located in the same plane as said ground substrate, wherein a first elongated portion of the main radiating element extends in an L shape away from a side edge of the ground substrate, the longer leg of said L shape extending substantially parallel to said side edge.
  • an integrated multi-band radio antenna and ground substrate device for a radio communication terminal comprising a flat ground substrate, a flat main radiating element having a radio signal feeding point, and a flat parasitic element .
  • Said main radiating element is located in substantially the same plane as said ground substrate, wherein a first elongated portion of the main radiating element extends in an L shape away from a side edge of the ground substrate, the longer leg of said L shape extending substantially parallel to said side edge.
  • said ground substrate, said main radiating element and said parasitic element are formed of a single sheet of electrically conductive material, and in one embodiment they are etched out from a metal layer on a printed circuit board.
  • said ground substrate is formed on one layer of a printed circuit board, whereas said main radiating element and said parasitic element are formed on another layer on said printed circuit board.
  • the ground substrate and the antenna will nevertheless be substantially located in the same plane, particularly compared to the conventional PIFA design.
  • substantially parallel is here meant that the distance between longer leg of the radiating element and the edge of the ground substrate is essentially constant over the extension of said longer leg, within the accuracy given by the used method of manufacture.
  • 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 which does not need a ground plane underneath the antenna structure. This makes it possible to make a very thin product.
  • 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 disclosed in Fig. 6A and 6B, which will be explained further down.
  • Fig. 1 discloses an antenna device 1, comprising an antenna 12 and a ground plane or substrate 20.
  • the length of the ground plane 20, i.e. the height in Fig. 1 is preferably approximately equal to one third of the wavelength for the lower radio frequency band for which the multi-band antenna 12 is tuned.
  • Fig. 2 illustrates the upper part of Fig. 1 in enlargement, with only a part of the ground plane 20 showing.
  • the antenna in Fig. 2 comprises several parts, and discloses an embodiment according to the example above, i.e. tuned for a lower frequency band of 900 MHz.
  • the main radiating element of the antenna comprises a first flat elongated member 2, which extends from a position 4 close to the upper edge 21 of ground plane 20.
  • this elongated member is bent 90 degrees in order to make the total length of the antenna device 1, including the ground plane 20, as short as possible.
  • the main radiating element is fed at a feeding point 3 at or near its base 4, adjacent to the edge 21 of the ground plane 20, but it is dielectrically separated from the ground plane 20, e.g. by a gap.
  • the elongated member 2 has a large width, in the disclosed embodiment about 5.4 mm. This large width contributes to the large bandwidth shown in Fig. 6A and 6B.
  • the total length of the wide elongated member 2 is about 35 mm from 4 to 10.
  • the main radiating element extends into a considerably longer, meandered member 9, which has a significantly smaller width than member 2.
  • the barrier obtained by the bottleneck at 10 creates one resonance dependent on the length of the wide member 2, and another resonance dependent on the entire length of the main radiating element 2,9 from end 4 at the feeding point 3 to the end point 11.
  • the relation between the width of member 2 and member 9 is at least 5:1, and preferably about 10:1. This relation is hence important in order to get the multi-band performance.
  • yet another radiating element may be added, electrically interconnected to portion 9, although not shown, a so called capacitive end piece.
  • a thin parasitic element member 5 is connected to the ground plane 20 at 7, and runs parallel with the main antenna member 2.
  • the width of this first parasitic element member 5 is approximately 1 mm, and it is positioned close to, about 1 mm, the electrically fed antenna element 2,9.
  • the total length of the first parasitic member 5 is approximately 21.1 mm in the disclosed embodiment.
  • the approximate length of this second parasitic member 6 is 21 mm in the disclosed embodiment.
  • the width of member 6 and the distance between member 6 and 5 is of the same order as the width of member 5 and the distance between member 5 element 2, respectively.
  • Fig. 3 illustrates a communication radio terminal in the embodiment of a cellular mobile phone 30 devised for multi-band radio communication.
  • the terminal 30 comprises a chassis or housing 35, carrying a user audio input in the form of a microphone 31 and a user audio output in the form of a loudspeaker 32 or a connector to an ear piece (not shown).
  • a set of keys, buttons or the like constitutes a data input interface 33 is usable e.g. for dialling, according to the established art.
  • a data output interface comprising a display 34 is further included, devised to display communication information, address list etc in a manner well known to the skilled person.
  • the radio communication terminal 30 includes radio transmission and reception electronics (not shown), and is devised with a built-in antenna device 1 inside the housing 35, which antenna device is indicated in the drawing by the dashed line as an essentially flat object.
  • this antenna device 1, corresponding to Fig. 1 includes a flat ground substrate 20, a flat main radiating element 2,9 having a radio signal feeding point 3, and a flat parasitic element 5,6.
  • the main radiating element 2,9 is dielectrically separated from the ground substrate, and located adjacent to and in the same plane as said ground substrate.
  • Fig. 4 illustrates another aspect of the present invention.
  • the antenna 12 and ground plane 20 of the antenna device 1 are located adjacent to each other in the same plane. Not all parts of the antenna device are electrically interconnected, e.g. not the main radiating element 2,9 and the ground plane 20, but they may nevertheless be formed as a single integrated element.
  • the ground substrate 20 and the antenna element 2,9 may be located on different layers of a printed circuit board, which board defines the plane in which they are arranged.
  • Fig. 4 illustrates an integrated multi-band radio antenna and ground substrate device 40 for a radio communication terminal.
  • This integrated device 40 comprises a flat ground substrate 20, a flat main radiating element 2,9 having a radio signal feeding point 3, and a flat parasitic element 5,6, wherein said main radiating element is dielectrically separated from the ground substrate, and located adjacent to and in the same plane as said ground substrate.
  • the elements 2,9,5,6,20 comprised in the integrated device 40 are bonded by an underlying dielectric substrate 41, such as a PCB, wherein said PCB 41 preferably carries radio terminal electronics on its opposite side and optionally on intermediate layers thereof.
  • the ground substrate 20, the main radiating element 2,9 and the parasitic element 5,6 are, in one embodiment, formed of a single sheet of electrically conductive material.
  • the interconnections 7 an 8 between the parasitic members 5,6 and the ground plane 20 are preferably simply formed by said parasitic members extending into the ground plane 20, being an integral part thereof.
  • the feeding point 3 may be a direct contact between the main radiating element 2 and the relevant leads on the PCB 41, wherein no auxiliary antenna connector is needed.
  • the integrated multi-band radio antenna 12 and ground substrate 20 is etched out from a metal layer on a printed circuit board 41, including the ground substrate, the main radiating element and the parasitic element.
  • a vertical arrow illustrates the position of the antenna 12 in relation to the ground plane 20, where the apex of the arrow indicates the end of the antenna device 1 at which the antenna 12 is located.
  • Figs 5A and 5B illustrate exemplary talking positions of a mobile phone 30 when operated by a user A.
  • the mobile phone is designed in the common way with the antenna 12 at the top of the phone 30, i.e. closest to the listening end of the phone 30 carrying the loudspeaker 32.
  • the mobile phone is designed with the antenna device 1 in the opposite way, with the antenna 12 at the bottom of the phone 30, closest to the speaking end of the phone 30 carrying the microphone 31.
  • FIG. 5C illustrates schematically the mobile phone 30 in operation by the user A, where the user A holds the phone 30 in his hand 50. If the antenna 12 is oriented in the way indicated in Fig. 5B, the hand 50 will effect the performance of the antenna 12, whereas for a design according to Fig. 5A the effect influence of the hand will probably be less noticeable.
  • Figs 6A and 6B illustrates the VSWR performance of the presented antenna design, in an embodiment as described in conjunction with Figs 1 and 2, with a ground plane of 11 cm, i.e. a third of the wavelength of the lowest resonance frequency 900 MHz.
  • the results come from a hand-made prototype, with the aid of the IE3D tool mentioned above. Markers point towards one of the curves in each drawing, and the frequency at each of those markers is illustrated in the respective drawing.
  • Fig. 6A relates to measurements with a top-mounted antenna 12.
  • the black line indicates the VSWR measured when the mobile phone 30 is placed in free space FS.
  • the grey line to which the triangular markers 1 to 5 point, represents talking position TP, as illustrated in Fig 5C, with the orientation of the phone 30 as illustrated in Fig. 5A. Since the antenna is located in the upper part of the phone 30, the antenna 12 is ideally not covered by the hand. A slight difference can be detected between the curves, due to the proximity of the hand and head rendering an enlarged ground plane to the antenna 12.
  • Fig. 6B relates to measurements with a bottom-mounted antenna 12, i.e. the phone is in operative position oriented as shown in Fig. 5B.
  • the black line indicates the VSWR measured when the mobile phone 30 is placed in free space FS, i.e. with no human tissue close to the antenna.
  • the grey line to which the triangular markers 1 to 5 point, represents talking position TP, as illustrated in Fig 5C, with the orientation of the phone 30 as illustrated in Fig. 5B.
  • the antenna is now partly or fully covered by the hand. The effect is considerably larger than in the case displayed in Fig. 6A, with a much more significant difference between FS and TP. In VSWR point this is to the better.
  • the built-in antenna is fairly small and very thin. Furthermore, it is possible to manufacture antenna 12 and PCB 41, having a ground plane 20, in one piece 40, which is mechanically very robust.
  • the antenna structure can be etched out from the PCB directly. No grounding of the antenna is needed, only the parasitic elements 5,6 need ground.
  • the design also has capabilities of rendering a low cost manufacture process, since no antenna connector is needed, and in that the antenna device 1 may be formed from a single film of e.g. copper.
  • the proposed design does not have an antenna volume in an ordinary sense, since the height to the ground plane is zero. A very thin mobile phone 30 can therefore be built.
  • the antenna 12 area is approximately 41*20 mm, and is preferably etched on the PCB.
  • the antenna 12 comprises two parasitic elements 5,6 which are parallel with the main antenna structure 2, and with each other. They are not meandered and do not have any capacitive end load.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
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EP02005816A 2002-03-14 2002-03-14 Eingebaute Mehrband-Planarantenne mit Inverted-L-Haupt- und Parasitär- Antennenelementen Expired - Lifetime EP1345282B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT02005816T ATE316295T1 (de) 2002-03-14 2002-03-14 Eingebaute mehrband-planarantenne mit inverted-l- haupt- und parasitär- antennenelementen
DE60208731T DE60208731T2 (de) 2002-03-14 2002-03-14 Eingebaute Mehrband-Planarantenne mit Inverted-L-Haupt- und Parasitär- Antennenelementen
EP02005816A EP1345282B1 (de) 2002-03-14 2002-03-14 Eingebaute Mehrband-Planarantenne mit Inverted-L-Haupt- und Parasitär- Antennenelementen
TW092102648A TWI258246B (en) 2002-03-14 2003-02-10 Flat built-in radio antenna
PCT/EP2003/002473 WO2003077360A1 (en) 2002-03-14 2003-03-11 Multiband planar built-in radio antenna with inverted-l main and parasitic radiators
US10/507,574 US7319432B2 (en) 2002-03-14 2003-03-11 Multiband planar built-in radio antenna with inverted-L main and parasitic radiators
AU2003215654A AU2003215654A1 (en) 2002-03-14 2003-03-11 Multiband planar built-in radio antenna with inverted-l main and parasitic radiators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02005816A EP1345282B1 (de) 2002-03-14 2002-03-14 Eingebaute Mehrband-Planarantenne mit Inverted-L-Haupt- und Parasitär- Antennenelementen

Publications (2)

Publication Number Publication Date
EP1345282A1 true EP1345282A1 (de) 2003-09-17
EP1345282B1 EP1345282B1 (de) 2006-01-18

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EP02005816A Expired - Lifetime EP1345282B1 (de) 2002-03-14 2002-03-14 Eingebaute Mehrband-Planarantenne mit Inverted-L-Haupt- und Parasitär- Antennenelementen

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AT (1) ATE316295T1 (de)
DE (1) DE60208731T2 (de)

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WO2008023095A1 (en) * 2006-08-25 2008-02-28 Pulse Finland Oy Multi-resonance antenna
US7928920B2 (en) 2007-05-17 2011-04-19 Casio Computer Co., Ltd. Film antenna and electronic equipment
US8111200B2 (en) 2008-05-29 2012-02-07 Casio Computer Co., Ltd. Planar antenna and electronic device
US8400364B2 (en) 2009-05-27 2013-03-19 Casio Computer Co., Ltd. Multiband planar antenna and electronic equipment
US8547283B2 (en) 2010-07-02 2013-10-01 Industrial Technology Research Institute Multiband antenna and method for an antenna to be capable of multiband operation
EP2728665A1 (de) * 2012-11-05 2014-05-07 Acer Incorporated Kommunikationsvorrichtung und Breitbandantennenelement darin
CN103811850A (zh) * 2012-11-13 2014-05-21 宏碁股份有限公司 通信装置
CN107508035A (zh) * 2017-08-08 2017-12-22 惠州硕贝德无线科技股份有限公司 一种改善手机人头手数据的天线方案
US10224630B2 (en) 2012-10-11 2019-03-05 Microsoft Technology Licensing, Llc Multiband antenna
US10476134B2 (en) 2007-03-30 2019-11-12 Fractus, S.A. Wireless device including a multiband antenna system
WO2019227651A1 (zh) * 2018-05-30 2019-12-05 京信通信系统（中国）有限公司 便携式通信终端及其pifa天线
CN113839187A (zh) * 2021-09-17 2021-12-24 长沙理工大学 一种寄生单元加载的高增益双频微带天线

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JP4613950B2 (ja) 2007-12-27 2011-01-19 カシオ計算機株式会社 平面モノポールアンテナ及び電子機器

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US11145955B2 (en) 2007-03-30 2021-10-12 Ignion, S.L. Wireless device including a multiband antenna system
US10476134B2 (en) 2007-03-30 2019-11-12 Fractus, S.A. Wireless device including a multiband antenna system
US7928920B2 (en) 2007-05-17 2011-04-19 Casio Computer Co., Ltd. Film antenna and electronic equipment
US8111200B2 (en) 2008-05-29 2012-02-07 Casio Computer Co., Ltd. Planar antenna and electronic device
US8400364B2 (en) 2009-05-27 2013-03-19 Casio Computer Co., Ltd. Multiband planar antenna and electronic equipment
US8547283B2 (en) 2010-07-02 2013-10-01 Industrial Technology Research Institute Multiband antenna and method for an antenna to be capable of multiband operation
US10224630B2 (en) 2012-10-11 2019-03-05 Microsoft Technology Licensing, Llc Multiband antenna
EP2728665A1 (de) * 2012-11-05 2014-05-07 Acer Incorporated Kommunikationsvorrichtung und Breitbandantennenelement darin
CN103811850B (zh) * 2012-11-13 2016-06-29 宏碁股份有限公司 通信装置
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WO2019227651A1 (zh) * 2018-05-30 2019-12-05 京信通信系统（中国）有限公司 便携式通信终端及其pifa天线
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DE60208731T2 (de) 2006-09-14
ATE316295T1 (de) 2006-02-15

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