EP1983606A1 - Dualpolarisierte multiple Band-Schleifenantenne und entsprechendes Verfahren für ein Funkgerät - Google Patents

Dualpolarisierte multiple Band-Schleifenantenne und entsprechendes Verfahren für ein Funkgerät Download PDF

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Publication number
EP1983606A1
EP1983606A1 EP07106265A EP07106265A EP1983606A1 EP 1983606 A1 EP1983606 A1 EP 1983606A1 EP 07106265 A EP07106265 A EP 07106265A EP 07106265 A EP07106265 A EP 07106265A EP 1983606 A1 EP1983606 A1 EP 1983606A1
Authority
EP
European Patent Office
Prior art keywords
loop
polarization direction
group
strips
loop strips
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
EP07106265A
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English (en)
French (fr)
Other versions
EP1983606B1 (de
Inventor
Qinjiang Rao
Geyi Wen
Mark Pecen
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.)
BlackBerry Ltd
Original Assignee
Research in Motion Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP10194345.4A priority Critical patent/EP2299537B1/de
Application filed by Research in Motion Ltd filed Critical Research in Motion Ltd
Priority to EP07106265.7A priority patent/EP1983606B1/de
Priority to SG200802853-2A priority patent/SG147387A1/en
Priority to CN200810109282.3A priority patent/CN101388493B/zh
Priority to MX2008004911A priority patent/MX2008004911A/es
Priority to KR1020080034840A priority patent/KR101087418B1/ko
Priority to BRPI0803648-9A priority patent/BRPI0803648B1/pt
Priority to CA2629178A priority patent/CA2629178C/en
Priority to TW097113691A priority patent/TWI362785B/zh
Publication of EP1983606A1 publication Critical patent/EP1983606A1/de
Application granted granted Critical
Publication of EP1983606B1 publication Critical patent/EP1983606B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • 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
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/04—Screened antennas
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength

Definitions

  • the present invention relates generally to an antenna for a portable radio device, such as a Bluetooth-capable or IEEE 802.11-capable device that operates at the IMS (Industry, Medical and Scientific) frequency band. More particularly, the present invention relates to a dual-polarized antenna, and an associated methodology, of compact construction, capable of positioning at, or within, a radio housing of the portable radio device.
  • a portable radio device such as a Bluetooth-capable or IEEE 802.11-capable device that operates at the IMS (Industry, Medical and Scientific) frequency band.
  • IMS Industry, Medical and Scientific
  • L-cornered antenna loops formed of loop strips, are disposed upon a substrate.
  • the loop strips extend in either of a first polarization direction or a second polarization direction, the second polarization direction orthogonal to the first polarization direction.
  • the loop strips are of dimensions and are connected together to be resonant at the IMS, or other selected, frequency band at orthogonal polarization directions.
  • Radio communication systems are used by many in modem society to communicate. Many varied communication services, both voice communication services and data communication services, are regularly effectuated by way of radio communication systems. And, as technological advancements permit, the types of communication services effectuable by way of radio communication systems shall likely increase.
  • Cellular communication systems are exemplary of radio communication systems that have high levels of usage.
  • Cellular communication systems are typically constructed to provide wide-area coverage. And, their infrastructures have been installed over significant portions of the populated areas of the world.
  • a user communicates by way of a radio communication system through use of a wireless device, a radio transceiver, sometimes referred to as a mobile station or user equipment (UE).
  • UE user equipment
  • access to a cellular communication system is provided pursuant to purchase of a subscription, either on a revolving, e.g., monthly basis, or on a pre-paid, time-usage basis.
  • Cellular communication systems operable pursuant to different operating standards, define radio air interfaces at different frequency bands, for instance, at the 800 MHz frequency band, at the 900 MHz frequency band, and at bands located between 1.7 GHz and 2.2 GHz.
  • WLAN Wireless Local Area Network
  • WLANs are regularly operated as private networks, providing users who have access to such networks the capability to communicate therethrough through the use of Bluetooth-capable or 802.11-capable wireless devices.
  • WLANs are sometimes configured to be connected to public networks, such as the Internet, and, in turn, to other communication networks, such as PSTNs (Public Switched Telephonic Networks) and PLMNs (Public Land Mobile Networks). Interworking entities also are sometimes provided to provide more-direct connection between the small-area networks and a PLMN.
  • PSTNs Public Switched Telephonic Networks
  • PLMNs Public Land Mobile Networks
  • Radio communication systems are generally bandwidth-constrained. That is to say, bandwidth allocations for their operation are limited. And, such limited allocation of bandwidth, imposes limits upon the communication capacity of the communication system. Significant efforts have been made, and attention directed towards manners by which, to efficiently utilize the limited bandwidth allocated in bandwidth-constrained systems.
  • Dual-polarization communication techniques are sometimes utilized. In a dual-polarization technique, data communicated at the same frequency is communicated in separate, polarized planes. Close to a doubling of the communication capacity is possible through the use of dual-polarization techniques. To transduce signal energy pursuant to a dual-polarization scheme, the wireless device is required to utilize a dual-polarized antenna, operable in the separate polarization planes. Use of dual-polarization techniques also are advantageous for the reason that the effects of multi-path transmission and other interference are generally reduced, thereby improving quality of signal transmission and reception.
  • a dual-polarized antenna is realizable, for instance, by feeding a square patch antenna at two orthogonal edges thereof by way of an edge feed or a probe feed.
  • existing dual-polarized patch antennas are used in conjunction with two feeding-network circuits.
  • Such existing antennas suffer from various limitations. For instance, separation distances between the feed connections are required to be great enough to prevent occurrence of coupling between the respective feeding lines. Excessive amounts of coupling results in high cross polarization levels.
  • Figure 1 illustrates a functional block diagram of a radio communication system in which an embodiment of the present invention is operable.
  • Figure 2 illustrates a plan view of a dual-polarized, multiple-strip loop antenna of an embodiment of the present invention.
  • Figure 3 illustrates a graphical representation showing simulated and measured return losses plotted as a function of frequency of an antenna forming part of a wireless device of an exemplary embodiment of the present invention.
  • Figure 4 illustrates a representation of an exemplary, simulated current distribution of an antenna of an embodiment of the present invention.
  • Figure 5 illustrates a graphical representation of simulated radiation patterns of an antenna of an embodiment of the present invention at 2.47GHz.
  • Figure 6 illustrates a graphical representation, similar to that shown in Figure 5 , but of measured radiation patterns exhibited by an antenna of an embodiment of the present invention at 2.47 GHz.
  • Figure 7 illustrates a graphical representation showing simulated gain as a function of an antenna of an embodiment of the present invention.
  • Figure 8 illustrates a method flow diagram representative of the method of operation of an embodiment of the present invention.
  • the present invention accordingly, advantageously provides antenna apparatus, and an associated method, for a portable radio device, such as a Bluetooth-compatible or 802.11-compatible device that operates at the IMS (Industry, Medical and Scientific) frequency band.
  • a portable radio device such as a Bluetooth-compatible or 802.11-compatible device that operates at the IMS (Industry, Medical and Scientific) frequency band.
  • a dual-polarized antenna of compact construction is provided.
  • the antenna is capable of positioning at, or within, a radio housing of the portable radio device.
  • the antenna is formed of loop strips etched upon a substrate, configured in a manner to be resonant at a selected frequency band, such as a frequency band located at 2.47 GHz.
  • the substrate is of dimensions permitting its positioning, together with the loop strips etched thereon, within the housing of a portable radio device, such as a wireless device operable in a Bluetooth-compatible or 802.11-compatible system.
  • Signal energy polarized in orthogonal, or other, directions. Transduced signal energy generated at the wireless device is transduced into electromagnetic form by the antenna and propagated therefrom in the polarized directions. And, electromagnetic energy communicated to the wireless device in the polarized directions is transduced into electrical form for subsequent operations thereon by circuitry of the radio device.
  • a first group of the loop strips etched onto the substrate is configured to form an L-cornered antenna loop.
  • the L-cornered loop is formed by configuring adjacent loop strips such that ends of the adjacent loop strips intersect at substantially perpendicular angles.
  • the loop strips of the first group, so-configured, are all, therefore positioned variously to extend in a first polarization direction or a second polarization direction, the second polarization direction orthogonal to the first polarization direction.
  • a second group of loop strips etched onto the substrate define a second L-cornered loop. Adjacent ones of the loop strips are configured to be connected at their ends at intersecting, substantially-perpendicular angles, thereby to be rectangular-cornered. And, each loop strip, so-configured, extends variously in a first polarization direction or a second polarization direction, orthogonal to a first polarization direction. Signal energy is transduced by the second loop, also in the two polarization directions.
  • the first group and second group of the loop strips include a shared set of loop strips, i.e., loop strips that are common to both the first group and the second group.
  • the shared set of loop strips form part of the first antenna loop and part of the second antenna loop. At least one of the loop strips of the shared set extends in the first polarization direction, and at least one of the loop strips of the shared set extends in the second polarization direction.
  • the shared set includes at least two loop strips that extend in the first polarization direction and at least one loop strip that extends in the second polarization direction.
  • the loop strips that extend in the first polarization direction are connected together by way of a loop strip that extends in the second polarization direction.
  • a single feed connection is provided for both of the polarization directions.
  • the single feed connection is formed, or otherwise defined, at a loop strip of the shared set.
  • the feed connection is positioned to permit symmetrical excitation of the two antenna loops.
  • antenna apparatus, and an associated methodology is provided for a radio device.
  • a substrate is provided.
  • a first group of loop strips is disposed upon the substrate.
  • the loop strips of the first group are configured to form a first loop having at least one loop strip extending in a first polarization direction and at least one loop strip extending in a second polarization direction.
  • a second group of loop strips is disposed upon the substrate.
  • the loop strips of the second group are configured to form a second loop having at least one strip that extends in the first polarization direction and at least one strip extending in the second polarization direction.
  • the first and second groups of loop strips each have loop strips that extend in the first and second polarization directions, respectively, and exhibit dual-polarization operation.
  • a radio communication system shown generally at 10, provides for communications with a mobile station 12.
  • the mobile station in the exemplary implementation, operates pursuant to a Bluetooth standard or IEEE 802.11 (b) or (g) standard, operable to send and to receive signals at the 2.4 GHz band.
  • the mobile station 12 is representative of any of various wireless devices
  • the radio communication system is representative of any various radio communication systems operable in conformity with any of various communication standards or permitting of operation at unregulated frequency bands.
  • the radio communication system includes a network part, here represented by a network station 14.
  • the network station comprises, for instance, an access point of a WLAN or an analogous entity that transceives signals with wireless devices, such as the mobile station 12.
  • the network station which here forms an access point, is part of a local network structure (WLAN) 16 that, in turn, is coupled to an external network, here a public packet data network (PDN) 18, such as the Internet.
  • WLAN local network structure
  • PDN public packet data network
  • the operating standard pursuant to which the mobile and network stations are operable is permitting of, and here provides for, dual-polarized communications at the operational frequency band of the communication system, here an ISM band that extends between 2.40 and 2.485 GHz.
  • the mobile station 12 includes transceiver circuitry, here represented by a receive (RX) part 26 and a transmit (TX) part 28.
  • the receive and transmit parts are coupled, such as by way of an antenna coupler or other entity that provides isolation between the transceiver parts to an antenna 32 of an embodiment of the present invention.
  • the transceiver circuitry is capable of dual-polarization operation. That is to say, the transmit and receive parts are capable of generating signals for transmission in both of the polarization directions and also to operate upon signals communicated to the mobile station in both of the polarization directions.
  • the antenna 32 forms a dual-polarized antenna, capable of transducing signal energy of both of the polarization directions. That is to say, signal energy is detected by the antenna in both of the dual-polarization directions. And, signal energy generated at the mobile station is transduced into electromagnetic form and radiated in both of the dual polarization directions.
  • the antenna 32 is disposed upon a generally planar substrate, of dimensions permitting its positioning within a housing of the mobile station.
  • FIG 2 illustrates in greater detail the antenna 32 of an embodiment of the present invention and that forms part of the mobile station 12, shown in Figure 1 .
  • the antenna is formed of a plurality of loop strips 42 disposed upon a substrate 44.
  • the loops strips are etched, painted, or otherwise formed upon the substrate.
  • the loop strips are configured such that adjacent ones of the loop strips abut against one another in electrical connection therebetween.
  • the loop strips are of lengths and widths and are connected together so as to be resonant at a desired frequency band, here the 2.4 GHz frequency band.
  • the loop strips are arranged into a rectangular loop structure comprised of a first group 46 of loop strips and a second group 48 of loop strips.
  • the adjacent loop strips intersect at their ends in substantially perpendicular intersecting angles.
  • the groups 46 and 48 form antenna loops-in which, due to the perpendicular intersecting angles of adjacent loop strips, the corners of the loops are L-configured, that is to say, L-cornered.
  • the loop strips of the loops 46 and 48 include a shared set 52 of loop strips.
  • the loop strips of the shared set are shared between the groups. That is to say, the loop strips of the shared set form parts of both groups 46 and 48.
  • the shared set in the exemplary implementation, and as shown, includes three loop strips, connected end-to-end, including two L-cornered portions.
  • Figure 2 illustrates references 54, 56, 58, 60, 62, 64, 66, and 68. At each of these reference points, an L-shaped corner of a loop is formed. Due to the substantially perpendicular intersections of the adjacent loop strips, the loop strips each extend in one of two polarization directions. The polarization directions are orthogonal, defined by the axes 72 and 74. The axis 74 defines a first polarization direction, and the axis 72 defines a second polarization direction. Loop strips that extend between reference points 64 and 54, between reference points 60 and 58, between reference points 62 and 68, and between reference points 66 and 56 all extend in the first polarization direction.
  • Loop strips extending between reference points 54 and 56, between reference points 56 and 58, between reference points 64 and 62, between reference points 62 and 60, and between reference points 66 and 68 all extend in the second polarization direction.
  • the lengths defining an outer perimeter of a rectangular configuration defined by the loop strips are all the same.
  • loop strips defined by points 54-56, 66-72, and 62-60 are also all of the corresponding lengths.
  • the widths of each of the loop strips is of the same width, w.
  • the antenna 32 includes a single feed connection 82 providing a feed connection point, connectable to the transceiver circuitry (shown in Figure 1 ) of the mobile station (shown in Figure 1 ).
  • the single feed connection provides a feed that, positioned as-illustrated at a mid-point of the loop strip 66-68, provides for symmetrical excitation of the loops formed of the groups 46 and 48 of loop strips. Because only a single feed connection is needed, problems associated with spacing requirements required between multiple feed connections, conventionally required, are obviated.
  • the geometrical configuration of the exemplary implementation of the antenna 32 shown in Figure 2 provides for three in-phase parallel strips in each of the polarization directions 72 and 74. Strips 54-58, 66-68, and 64-60 extend in the second polarization direction. And, parallel strips 54-64, 58-60, and 56-66/68-62 extending in the first polarization direction permit the antenna to exhibit both high gain and high efficiency.
  • the two groups 46 and 48 of loop strips are etched on a printed circuit board, or other substrate.
  • the loop strips are regarded as a combination of two electrically-connected, multiple L-shaped, rectangular loop strips that have a common set of shared strips.
  • the antenna further includes a metal reflector 84 disposed in the strip-loop aperture plane, here disposed beneath a bottom surface of the substrate 44.
  • Orthogonal, dual-polarization radiation is realized by arranging the loop strips to extend in directions parallel to one of the axes 72 or 74.
  • the feed connection 82 located at the center of the loop strip 66-68, provides for symmetrical excitation, thereby to reduce cross-polarization levels of the dual-polarization components.
  • the loop strips extending in each of the polarization directions are arranged into an in-phase, three-element array that provides high gain levels.
  • the current, i.e., charge flow, direction during operation of the antenna reverses at half-wavelength intervals due to standing wave distributions along the strips.
  • each side of the outer-perimetal loop is divided equivalently into three sections, thereby to produce an in-phase current distribution on all of the strip sections if the length of the perimetal loop is appropriately chosen.
  • Figure 3 illustrates a graphical representation 92 illustrating plots 94 and 96 that are representative of simulated and measured return losses, respectively, plotted as a function of frequency.
  • the antenna is resonant at the 2.4 GHz frequency band, and the plots are indicative thereof.
  • Figure 4 again illustrates the antenna 32 of an exemplary embodiment of the present invention.
  • the antenna headers represent the current in the antenna.
  • Analysis of the current distribution indicates that the current distribution is in directions parallel to the polarization axes 72 and 74 shown in Figure 2 .
  • Figures 5 and 6 illustrate, respectively, simulated and measured, two-dimensional, radiation patterns of the antenna 32 of an embodiment of the present invention at its 2.47 GHz resonant frequency. In each representation, both zero and ninety degree-plane representations 102 and 104 are plotted.
  • Figure 7 illustrates a graphical representation 106 illustrating simulated gain, as a function of frequency, exhibited by the antenna 32 of an embodiment of the present invention.
  • the gain is centered at, or close to, the 2.47 GHz resonant frequency.
  • Figure 8 illustrates a method flow diagram, shown generally at 112, representative of the method of operation of an embodiment of the present invention.
  • the method is for transducing signal energy at a radio device.
  • a first group of loop strips are disposed upon a substrate.
  • the loop strips of the first group are configured to form a first loop having at least one strip extending in a first polarization direction and at least one strip extending in a second polarization direction.
  • a second group of loop strips are disposed upon the substrate.
  • the loop strips of the second group are configured to form a second loop having at least one strip extending in the first polarization direction and at least one strip extending in the second polarization direction.
  • the loop strips are used to transduce signal energy, polarized in the polarization direction and in the second polarization direction, at the first and second groups, respectively, of the loop strips.
  • a dual-polarized antenna of compact dimensions.
  • loop strips disposed upon a substrate configured in a manner to permit use of a single feed connection to symmetrically excite the antenna, so-configured, obviates the problems associated with multiple feed connections used by conventional dual-polarized antennas are obviated.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
EP07106265.7A 2007-04-16 2007-04-16 Dualpolarisierte multiple Band-Schleifenantenne und entsprechendes Verfahren für ein Funkgerät Active EP1983606B1 (de)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP07106265.7A EP1983606B1 (de) 2007-04-16 2007-04-16 Dualpolarisierte multiple Band-Schleifenantenne und entsprechendes Verfahren für ein Funkgerät
EP10194345.4A EP2299537B1 (de) 2007-04-16 2007-04-16 Tragbares Funkgerät mit dualpolarisierter Schleifeantenne und entsprechendes Verfahren
CN200810109282.3A CN101388493B (zh) 2007-04-16 2008-04-14 无线电设备的双极化、多带环天线及相关方法
MX2008004911A MX2008004911A (es) 2007-04-16 2008-04-14 Antena de lamina de bucle multiple de doble polarizacion, y metodologia asociada, para dispositivo de radio.
SG200802853-2A SG147387A1 (en) 2007-04-16 2008-04-14 Dual-polarized, multiple strip-loop antenna, and associated methodology, for radio device
KR1020080034840A KR101087418B1 (ko) 2007-04-16 2008-04-15 무선 장치용 이중 편파형 다중 스트립 루프 안테나, 및관련 방법
BRPI0803648-9A BRPI0803648B1 (pt) 2007-04-16 2008-04-15 Aparelho de antena para um dispositivo de rádio e método para a transdução de uma energia de sinal a partir de um dispositivo de rádio
CA2629178A CA2629178C (en) 2007-04-16 2008-04-15 Dual-polarized, multiple strip-loop antenna, and associated methodology, for radio device
TW097113691A TWI362785B (en) 2007-04-16 2008-04-15 Dual-polarized, multiple strip-loop antenna, and associated methodology, for radio device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07106265.7A EP1983606B1 (de) 2007-04-16 2007-04-16 Dualpolarisierte multiple Band-Schleifenantenne und entsprechendes Verfahren für ein Funkgerät

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP10194345.4A Division-Into EP2299537B1 (de) 2007-04-16 2007-04-16 Tragbares Funkgerät mit dualpolarisierter Schleifeantenne und entsprechendes Verfahren
EP10194345.4A Division EP2299537B1 (de) 2007-04-16 2007-04-16 Tragbares Funkgerät mit dualpolarisierter Schleifeantenne und entsprechendes Verfahren

Publications (2)

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EP1983606A1 true EP1983606A1 (de) 2008-10-22
EP1983606B1 EP1983606B1 (de) 2016-03-16

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EP10194345.4A Active EP2299537B1 (de) 2007-04-16 2007-04-16 Tragbares Funkgerät mit dualpolarisierter Schleifeantenne und entsprechendes Verfahren
EP07106265.7A Active EP1983606B1 (de) 2007-04-16 2007-04-16 Dualpolarisierte multiple Band-Schleifenantenne und entsprechendes Verfahren für ein Funkgerät

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EP10194345.4A Active EP2299537B1 (de) 2007-04-16 2007-04-16 Tragbares Funkgerät mit dualpolarisierter Schleifeantenne und entsprechendes Verfahren

Country Status (7)

Country Link
EP (2) EP2299537B1 (de)
KR (1) KR101087418B1 (de)
CN (1) CN101388493B (de)
BR (1) BRPI0803648B1 (de)
CA (1) CA2629178C (de)
MX (1) MX2008004911A (de)
TW (1) TWI362785B (de)

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EP2666208A1 (de) * 2011-01-18 2013-11-27 DockOn AG Umlaufend polarisierte verbund-schleifenantenne

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US10389034B2 (en) 2015-01-16 2019-08-20 Kabushiki Kaisha Toshiba Antenna

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WO2006011008A1 (en) * 2004-07-20 2006-02-02 Nokia Corporation A multi-band antenna arrangement
EP1679763A2 (de) 2004-12-28 2006-07-12 DX Antenna Co., Ltd. Antenne

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WO2006011008A1 (en) * 2004-07-20 2006-02-02 Nokia Corporation A multi-band antenna arrangement
EP1679763A2 (de) 2004-12-28 2006-07-12 DX Antenna Co., Ltd. Antenne

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2666208A1 (de) * 2011-01-18 2013-11-27 DockOn AG Umlaufend polarisierte verbund-schleifenantenne
EP2666208A4 (de) * 2011-01-18 2015-02-18 Dockon Ag Umlaufend polarisierte verbund-schleifenantenne
US9252487B2 (en) 2011-01-18 2016-02-02 Dockon Ag Circular polarized compound loop antenna

Also Published As

Publication number Publication date
BRPI0803648A2 (pt) 2009-04-22
CA2629178A1 (en) 2008-10-16
CA2629178C (en) 2013-03-19
EP1983606B1 (de) 2016-03-16
TW200901565A (en) 2009-01-01
EP2299537B1 (de) 2020-01-01
TWI362785B (en) 2012-04-21
EP2299537A2 (de) 2011-03-23
CN101388493B (zh) 2014-04-16
CN101388493A (zh) 2009-03-18
KR20080093384A (ko) 2008-10-21
EP2299537A3 (de) 2011-06-29
BRPI0803648B1 (pt) 2021-09-08
MX2008004911A (es) 2009-03-02
KR101087418B1 (ko) 2011-11-25

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