WO2008078144A1 - An apparatus comprising an antenna element and a metal part - Google Patents

An apparatus comprising an antenna element and a metal part Download PDF

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Publication number
WO2008078144A1
WO2008078144A1 PCT/IB2006/004180 IB2006004180W WO2008078144A1 WO 2008078144 A1 WO2008078144 A1 WO 2008078144A1 IB 2006004180 W IB2006004180 W IB 2006004180W WO 2008078144 A1 WO2008078144 A1 WO 2008078144A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal part
antenna element
filter
ground
band
Prior art date
Application number
PCT/IB2006/004180
Other languages
French (fr)
Inventor
Eero Varjonen
Original Assignee
Nokia Corporation
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 Nokia Corporation filed Critical Nokia Corporation
Priority to US12/448,391 priority Critical patent/US9246212B2/en
Priority to CN2006800567129A priority patent/CN101573833B/en
Priority to EP20060849519 priority patent/EP2102942A4/en
Priority to PCT/IB2006/004180 priority patent/WO2008078144A1/en
Publication of WO2008078144A1 publication Critical patent/WO2008078144A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49016—Antenna or wave energy "plumbing" making
    • Y10T29/49018—Antenna or wave energy "plumbing" making with other electrical component

Definitions

  • An apparatus comprising an antenna element and a metal part.
  • Embodiments of the present invention relate to an apparatus comprising an antenna element and a metal part.
  • a radio communications apparatus comprises an antenna element for transmitting and/or receiving radio signals. It may also comprise a metal part, separate to the antenna element, that is provided for a function unconnected with the operation of the antenna element.
  • the metal part may be, for example, an electromagnetic shield for shielding of electronic components, a structural support element such as a chassis or frame, part of an integrated component such as battery cell etc.
  • the presence of the metal part may affect the operational characteristics of the antenna element because of electro-magnetic coupling.
  • One approach to this problem is to electrically isolate the metal part to suppress electric currents flowing within the part.
  • a disadvantage of this approach is that the metal part may become electro-statically charged.
  • grounding topology chosen for a metal part may affect the performance of the antenna element. This problem is compounded if the antenna element is a multi-band antenna element as a satisfactory solution for one band may be unsatisfactory for other bands. It would therefore be desirable to provide more design freedom in creating an effective grounding topology for a metal part.
  • an apparatus comprising: an antenna element; a metal part; a ground; and a filter connected between the metal part and the ground that has a frequency dependent impedance.
  • a method of assembling an apparatus comprising a radiating antenna element, the method comprising: electrically interconnecting a metal part, separate to the antenna element, and a ground via a filter that has a frequency dependent impedance.
  • Figure 1 A is a plan view of an apparatus that grounds a metal part via a filter 12 that has a frequency dependent impedance
  • Figure 1 B is a side view of the apparatus
  • Figure 1C is a perspective side-top view of the apparatus.
  • Figures 1A, 1 B and 1 C illustrate an apparatus 10 that comprises an antenna element 2, a metal part 20, a ground 18 and a filter 12 connected between the metal part 20 and the ground 18 that has a frequency dependent impedance.
  • Figure 1 A is a plan view of the apparatus 10
  • Figure 1 B is a side view of the apparatus 10
  • Figure 1C is a perspective side-top view of the apparatus 10.
  • the antenna element 2 is a multi-band radio frequency radiator element having operational bands including at least a first frequency band of operation and a second, different, frequency band of operation.
  • the ground plane 4 is provided by a printed wiring board (PWB) 4 which extends under and adjacent to the antenna element 2 and also the metal part 20.
  • PWB printed wiring board
  • the metal part 20 is physically and functionally separate and distinct from the antenna element 2 and typically performs some other function. It may, for example, be decorative trimming, a battery casing or electromagnetic shielding or a support for a keypad or some other supporting chassis element.
  • the metal part 20 is electrically connected at different points via electrical connectors 22 n to a ground 18 provided by the underlying ground plane (PWB) 4.
  • the electrical connectors 22 provide a galvanic dc current path from the metal part 20 to the ground 18. Although multiple connectors are illustrated, in other embodiments a single connector may be used.
  • At least one of the current paths between the metal part 20 and the ground plane 4 incorporates a filter 12 that has a frequency dependent impedance.
  • the frequency dependent impedance is arranged to be relatively low at one or more of the operational bands of the antenna element 2 and relatively high for the other operational band or bands of the antenna element 2.
  • the filter may operate as a band-stop filter in that it has a very high impedance for one (or more) of the operational bands of the antenna element 2 but not the other or other operational bands. It will be appreciated that filters other than band-stop filters may be used and that any form of filter network may be appropriate.
  • the filter 12 is a parallel LC filter that comprises a capacitor 14 connected in parallel with an inductor 16 between ground 18 and the metal part 20.
  • the capacitor 14 and the inductor 16, in this example, are discrete components which have values chosen so that the resonant frequency ⁇ 0 of the LC circuit corresponds to the second frequency band of the antenna element 2.
  • the parallel LC filter 12 provides a permanent dc current path to ground from the metal part 20, which prevents electro-static charge accumulating at the metal part 20.
  • the current paths to ground for the first frequency band include current paths via the electrical connectors 22i, 22 2 , 22 ⁇ and 22 4 .
  • the current paths to ground include paths via the electrical connectors 22 2, 22 3 and 22 4 but do not include a path via the electrical connector 22i.
  • any number of electrical connectors 22 may be used to provide separate current paths to the ground 18 provided by the PWB 4 from the metal part 20 and that some, or all, of these current paths may include within them a filter 12.
  • the same or different filters may be used in the respective current paths.
  • the filters may, for example, be band- stop filters with stops at the same or different operational frequency bands.
  • the connectors 22 which are used to make electrical connection between the ground 18 provided by the PWB 4 and the metal part 20 may also be used to secure, that is fix, the metal part 20 to the PWB 4.
  • the electrical connectors 22 may be provided by screws that screw parts of the metal part 20 into grounded portions of the PWB 4.
  • Apparatus 10 may be any type of radio transmission or reception device or a module for such a device. It may for example be a personal electronic device that is hand-portable such as, for example, a mobile cellular telephone.
  • the antenna element 2 may have operational bandwidths (low insertion loss S11) for different radio frequency bandwidths.
  • the first frequency band of operation may include one or more of US-GSM 850 (824- 894 MHz) and EGSM 900 (880-960MHz) and the second frequency band of operation may include one or more of PCN/DCS1800 (1710-1880 MHz), US- WCDMA1900 (1850-1990), WCDMA2100 (Tx: 1920-19801 Rx: 2110-2180) and PCS1900 (1850-1990 MHz).
  • These bands represent current cellular telecommunication radio frequency bands.
  • one or both of the operational frequency bands may relate to other radio frequency bands such as the band for Wireless Local Area Networking (WLAN) and Bluetooth or the bands for mobile radio or television.
  • WLAN Wireless Local Area Networking
  • Bluetooth the bands for mobile radio or television.
  • the antenna element 2 is a monopole antenna element- a Planer Inverted F Antenna (PIFA) that overlies an adjacent ground plane 4.
  • PIFA Planer Inverted F Antenna
  • IFA inverted F antenna
  • IFA inverted F antenna
  • IFA external retractable monopole
  • Types of antenna elements other than monoples may also be used such as dipoles, slots, waveguides etc.
  • the antenna element 2 may be an element for an internal antenna as illustrated in Figs 1A, 1B and 1C or may be an element for an external antenna.

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

Abstract

An apparatus comprising: an antenna element; a metal part; a ground; and a filter connected between the metal part and the ground that has a frequency dependent impedance.

Description

TITLE
An apparatus comprising an antenna element and a metal part.
FIELD OF THE INVENTION
Embodiments of the present invention relate to an apparatus comprising an antenna element and a metal part.
BACKGROUND TO THE INVENTION
A radio communications apparatus comprises an antenna element for transmitting and/or receiving radio signals. It may also comprise a metal part, separate to the antenna element, that is provided for a function unconnected with the operation of the antenna element. The metal part may be, for example, an electromagnetic shield for shielding of electronic components, a structural support element such as a chassis or frame, part of an integrated component such as battery cell etc.
The presence of the metal part may affect the operational characteristics of the antenna element because of electro-magnetic coupling.
One approach to this problem is to electrically isolate the metal part to suppress electric currents flowing within the part. A disadvantage of this approach is that the metal part may become electro-statically charged.
Another approach to this problem is to ground the metal part.
BRIEF DESCRIPTION OF THE INVENTION
The inventors have realized that the grounding topology chosen for a metal part may affect the performance of the antenna element. This problem is compounded if the antenna element is a multi-band antenna element as a satisfactory solution for one band may be unsatisfactory for other bands. It would therefore be desirable to provide more design freedom in creating an effective grounding topology for a metal part.
According to one embodiment of the invention there is provided an apparatus comprising: an antenna element; a metal part; a ground; and a filter connected between the metal part and the ground that has a frequency dependent impedance.
According to another embodiment of the invention there is provided a method of assembling an apparatus comprising a radiating antenna element, the method comprising: electrically interconnecting a metal part, separate to the antenna element, and a ground via a filter that has a frequency dependent impedance.
BRIEF DESCRIPTION OF THE DRAWINGS
For a better understanding of the present invention reference will now be made by way of example only to the accompanying drawings in which: Figure 1 A is a plan view of an apparatus that grounds a metal part via a filter 12 that has a frequency dependent impedance; Figure 1 B is a side view of the apparatus; and Figure 1C is a perspective side-top view of the apparatus.
DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION
Figures 1A, 1 B and 1 C illustrate an apparatus 10 that comprises an antenna element 2, a metal part 20, a ground 18 and a filter 12 connected between the metal part 20 and the ground 18 that has a frequency dependent impedance. Figure 1 A is a plan view of the apparatus 10, Figure 1 B is a side view of the apparatus 10 and Figure 1C is a perspective side-top view of the apparatus 10.
In the illustrated example, the antenna element 2 is a multi-band radio frequency radiator element having operational bands including at least a first frequency band of operation and a second, different, frequency band of operation.
The ground plane 4 is provided by a printed wiring board (PWB) 4 which extends under and adjacent to the antenna element 2 and also the metal part 20. The metal part 20 is physically and functionally separate and distinct from the antenna element 2 and typically performs some other function. It may, for example, be decorative trimming, a battery casing or electromagnetic shielding or a support for a keypad or some other supporting chassis element.
The metal part 20 is electrically connected at different points via electrical connectors 22n to a ground 18 provided by the underlying ground plane (PWB) 4. The electrical connectors 22 provide a galvanic dc current path from the metal part 20 to the ground 18. Although multiple connectors are illustrated, in other embodiments a single connector may be used.
At least one of the current paths between the metal part 20 and the ground plane 4 incorporates a filter 12 that has a frequency dependent impedance. The frequency dependent impedance is arranged to be relatively low at one or more of the operational bands of the antenna element 2 and relatively high for the other operational band or bands of the antenna element 2.
The filter may operate as a band-stop filter in that it has a very high impedance for one (or more) of the operational bands of the antenna element 2 but not the other or other operational bands. It will be appreciated that filters other than band-stop filters may be used and that any form of filter network may be appropriate.
In the illustrated example, the filter 12 is a parallel LC filter that comprises a capacitor 14 connected in parallel with an inductor 16 between ground 18 and the metal part 20. The capacitor 14 and the inductor 16, in this example, are discrete components which have values chosen so that the resonant frequency ω0 of the LC circuit corresponds to the second frequency band of the antenna element 2. As is known to those skilled in the art, the effective impedance of the parallel LC filter 12 becomes very large at the resonant frequency ω0 =(LC)"1/2. Consequently, at the resonant frequency (the second frequency band of the antenna element 2) the metal part 20 that is connected to ground 18 via the filter 12 becomes decoupled from the ground 18 because of the filter's very high impedance. However, at a lower frequency (e.g. the first frequency band) the metal part 20 remains electrically coupled to the ground 18 via the inductor 16.
The parallel LC filter 12 provides a permanent dc current path to ground from the metal part 20, which prevents electro-static charge accumulating at the metal part 20.
It will therefore be appreciated that the current paths to ground for the first frequency band include current paths via the electrical connectors 22i, 222, 22β and 224. However, at the second, higher, frequency band the current paths to ground include paths via the electrical connectors 222, 223 and 224 but do not include a path via the electrical connector 22i.
It will be appreciated that any number of electrical connectors 22 may be used to provide separate current paths to the ground 18 provided by the PWB 4 from the metal part 20 and that some, or all, of these current paths may include within them a filter 12. The same or different filters may be used in the respective current paths. The filters may, for example, be band- stop filters with stops at the same or different operational frequency bands.
In some embodiments, the connectors 22 which are used to make electrical connection between the ground 18 provided by the PWB 4 and the metal part 20 may also be used to secure, that is fix, the metal part 20 to the PWB 4. For example, the electrical connectors 22 may be provided by screws that screw parts of the metal part 20 into grounded portions of the PWB 4.
Apparatus 10 may be any type of radio transmission or reception device or a module for such a device. It may for example be a personal electronic device that is hand-portable such as, for example, a mobile cellular telephone.
The antenna element 2 may have operational bandwidths (low insertion loss S11) for different radio frequency bandwidths. As an example, the first frequency band of operation may include one or more of US-GSM 850 (824- 894 MHz) and EGSM 900 (880-960MHz) and the second frequency band of operation may include one or more of PCN/DCS1800 (1710-1880 MHz), US- WCDMA1900 (1850-1990), WCDMA2100 (Tx: 1920-19801 Rx: 2110-2180) and PCS1900 (1850-1990 MHz). These bands represent current cellular telecommunication radio frequency bands. In other embodiments one or both of the operational frequency bands may relate to other radio frequency bands such as the band for Wireless Local Area Networking (WLAN) and Bluetooth or the bands for mobile radio or television.
In the illustrated example, the antenna element 2 is a monopole antenna element- a Planer Inverted F Antenna (PIFA) that overlies an adjacent ground plane 4. Although a particular monopole antenna is illustrated, other monopole antenna elements may be used. One type of monopole is an inverted F antenna (IFA). It typically does not overlie a ground plane. Another type of monopole is an external retractable monopole. It also does not overlie a ground plane. Types of antenna elements other than monoples may also be used such as dipoles, slots, waveguides etc. The antenna element 2 may be an element for an internal antenna as illustrated in Figs 1A, 1B and 1C or may be an element for an external antenna.
Although embodiments of the present invention have been described in the preceding paragraphs with reference to various examples, it should be appreciated that modifications to the examples given can be made without departing from the scope of the invention as claimed. For example, although the embodiments of the invention have been described for the sake of clarity as having a single metal part, it should be understood that this limitation is not a technical limitation and the apparatus 10 may have multiple grounded metal parts each of which may have one or more current paths to ground some or all of which may be via filter networks.
Whilst endeavoring in the foregoing specification to draw attention to those features of the invention believed to be of particular importance it should be understood that the Applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and/or shown in the drawings whether or not particular emphasis has been placed thereon.
I/we claim:

Claims

1. An apparatus comprising: ^an antenna element; a metal part; a ground; and a filter connected between the metal part and the ground that has a frequency dependent impedance.
2. An apparatus as claimed in claim 1 , wherein the filter provides for a frequency dependent current path between the ground and the metal part.
3. An apparatus as claimed in claim 1 or 2, wherein the filter comprises a parallel LC circuit.
4. An apparatus as claimed in any claim 3, wherein the parallel LC circuit comprises discrete components.
5. An apparatus as claimed in any preceding claim, wherein the filter is a band-stop filter having a very high impedance at a particular frequency band.
6. An apparatus as claimed in any preceding claim, comprising multiple conductive connections between the metal part and the ground, wherein one of the multiple conductive connections incorporates the filter.
7. An apparatus as claimed in any preceding claim, comprising multiple conductive connections between the metal part and the ground, wherein a plurality of the multiple conductive connections incorporate a filter.
8. An apparatus as claimed in claim 6 or 7, wherein the connection nearest the antenna element comprises the filter.
9. An apparatus as claimed in claim 6 or 7, wherein the connections are provided by connectors that connect the metal part to a grounded printed wiring board.
10. An apparatus as claimed in claim 9, wherein the connectors are screws.
11. An apparatus as claimed in any preceding claim, wherein the antenna element is a monopole antenna element.
12. An apparatus as claimed in any preceding claim, wherein the antenna element is positioned adjacent a ground plane that provides the ground.
13. An apparatus as claimed in any preceding claim, wherein the ground plane is provided by a printed wiring board.
14. An apparatus as claimed in any preceding claim, wherein the antenna element is a multi band antenna element having a first frequency band of operation and a second, different, frequency band of operation.
15. An apparatus as claimed in claim 14, wherein the filter is tuned to the second frequency band.
16. An apparatus as claimed in claim 14 or 15, wherein the filter is a band- stop filter having a very high impedance at the second frequency band.
17. An apparatus as claimed in any preceding claim, wherein the metal part is not an antenna element.
18. An apparatus as claimed in any preceding claim, wherein the metal part is a supporting chassis.
19. An apparatus as claimed in any preceding claim embodied as a module for a radio communication device or embodied as a radio communication device.
20 A personal electronic device incorporating the apparatus as claimed in any one of claims 1 to 18.
21. A method of assembling an apparatus comprising a radiating antenna element, the method comprising: electrically interconnecting a metal part, separate to the antenna element, and a ground via a filter that has a frequency dependent impedance.
PCT/IB2006/004180 2006-12-22 2006-12-22 An apparatus comprising an antenna element and a metal part WO2008078144A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US12/448,391 US9246212B2 (en) 2006-12-22 2006-12-22 Apparatus comprising an antenna element and a metal part
CN2006800567129A CN101573833B (en) 2006-12-22 2006-12-22 An apparatus comprising an antenna element and a metal part
EP20060849519 EP2102942A4 (en) 2006-12-22 2006-12-22 An apparatus comprising an antenna element and a metal part
PCT/IB2006/004180 WO2008078144A1 (en) 2006-12-22 2006-12-22 An apparatus comprising an antenna element and a metal part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2006/004180 WO2008078144A1 (en) 2006-12-22 2006-12-22 An apparatus comprising an antenna element and a metal part

Publications (1)

Publication Number Publication Date
WO2008078144A1 true WO2008078144A1 (en) 2008-07-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/004180 WO2008078144A1 (en) 2006-12-22 2006-12-22 An apparatus comprising an antenna element and a metal part

Country Status (4)

Country Link
US (1) US9246212B2 (en)
EP (1) EP2102942A4 (en)
CN (1) CN101573833B (en)
WO (1) WO2008078144A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2348575A1 (en) * 2010-01-26 2011-07-27 Eaton GmbH Radio transmission assembly
EP2424033A1 (en) * 2010-08-26 2012-02-29 Research In Motion Limited Mobile wireless communications device having a frequency selective grounding circuit
US8180412B2 (en) 2010-08-26 2012-05-15 Research In Motion Limited Mobile wireless communications device having frequency selective grounding and related method
US8471768B2 (en) 2009-12-22 2013-06-25 Nokia Corporation Method and apparatus for an antenna

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI370582B (en) * 2009-12-24 2012-08-11 Acer Inc Folder-type mobile communication device
US8816912B2 (en) 2009-12-30 2014-08-26 Tyco Electronics Services Gmbh Antenna devices having frequency-dependent connection to electrical ground
KR101710434B1 (en) * 2009-12-30 2017-02-27 타이코 일렉트로닉스 서비시스 게엠베하 Antenna devices having frequency-dependent connection to electrical ground
CN102083300A (en) * 2011-01-19 2011-06-01 青岛海信移动通信技术股份有限公司 Anti-interference structure for wireless signal and portable mobile terminal
CN108366728B (en) * 2015-12-03 2021-09-03 皇家飞利浦有限公司 Electrostatic charge filter for electrocardiographic signals damaged by electrostatic charge and routed to an Electrocardiogram (EKG) monitor
US10667033B2 (en) * 2016-03-02 2020-05-26 Bragi GmbH Multifactorial unlocking function for smart wearable device and method
US9799947B1 (en) * 2016-06-06 2017-10-24 Motorola Mobility Llc Modular device system desense reduction
CN106058485A (en) * 2016-07-26 2016-10-26 智慧海派科技有限公司 Board to improve the radiation coupling loss through integrated circuit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1261571B (en) * 1962-08-18 1968-02-22 Inst Rundfunktechnik G M B H Method for reducing the secondary radiation of a vertical conductor
US6266019B1 (en) 2000-07-21 2001-07-24 Ericsson Inc. System for increasing antenna efficiency
US20030098813A1 (en) * 2001-11-27 2003-05-29 Filtronic Lk Oy Dual antenna and radio device
JP2004040525A (en) 2002-07-04 2004-02-05 Sony Corp Device and method for transmitting video signal
EP1469550A2 (en) 2003-04-18 2004-10-20 Matsushita Electric Industrial Co., Ltd. Radio antenna apparatus provided with controller for controlling SAR (specific absorption rate) and radio communication apparatus using the same radio antenna apparatus
WO2005074070A1 (en) 2004-02-02 2005-08-11 Amc Centurion Ab Antenna device and portable radio communication device comprising such an antenna device

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0622864B1 (en) * 1993-04-28 2000-06-21 Casio Computer Co., Ltd. Antenna apparatus capable of producing desirable antenna radiation patterns without modifying antenna structure
FI113212B (en) * 1997-07-08 2004-03-15 Nokia Corp Dual resonant antenna design for multiple frequency ranges
SE9801381D0 (en) 1998-04-20 1998-04-20 Allgon Ab Ground extension arrangement for coupling to ground means in an antenna system, and an antenna system and a mobile radio device having such ground arrangement
US6369761B1 (en) * 2000-04-17 2002-04-09 Receptec L.L.C. Dual-band antenna
FI114251B (en) * 2000-09-22 2004-09-15 Filtronic Lk Oy resonator filter
US6421016B1 (en) * 2000-10-23 2002-07-16 Motorola, Inc. Antenna system with channeled RF currents
JP3636122B2 (en) * 2001-09-19 2005-04-06 株式会社村田製作所 Dielectric filter, dielectric duplexer, and communication device
EP1320147A1 (en) 2001-12-17 2003-06-18 Sony International (Europe) GmbH Tuneable radiation shielding in multiband mobile terminals
US6819287B2 (en) * 2002-03-15 2004-11-16 Centurion Wireless Technologies, Inc. Planar inverted-F antenna including a matching network having transmission line stubs and capacitor/inductor tank circuits
JP3952816B2 (en) * 2002-03-18 2007-08-01 株式会社村田製作所 Wireless communication device
JP4096294B2 (en) 2002-05-14 2008-06-04 日本電気株式会社 Mobile phone equipment
AU2003245383A1 (en) * 2002-06-03 2003-12-19 Mendolia, Greg, S. Combined emi shielding and internal antenna for mobile products
JP3975843B2 (en) 2002-07-04 2007-09-12 株式会社村田製作所 Wireless communication device
DE10242935B3 (en) * 2002-09-16 2004-04-29 Kathrein-Werke Kg Antenna arrangement with an area dipole
KR100652620B1 (en) * 2003-07-30 2006-12-06 엘지전자 주식회사 Mobile phone having internal antenna
CN1977419B (en) * 2004-09-28 2011-08-24 松下电器产业株式会社 Radio machine antenna device and portable radio machine
JP2006319867A (en) * 2005-05-16 2006-11-24 Matsushita Electric Ind Co Ltd Antenna module and wireless device using it
US7471247B2 (en) * 2006-06-13 2008-12-30 Nokia Siemens Networks, Oy Antenna array and unit cell using an artificial magnetic layer
US7688267B2 (en) * 2006-11-06 2010-03-30 Apple Inc. Broadband antenna with coupled feed for handheld electronic devices
KR100822844B1 (en) * 2006-11-14 2008-04-17 주식회사 네오펄스 Active rf module
US7764236B2 (en) * 2007-01-04 2010-07-27 Apple Inc. Broadband antenna for handheld devices

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1261571B (en) * 1962-08-18 1968-02-22 Inst Rundfunktechnik G M B H Method for reducing the secondary radiation of a vertical conductor
US6266019B1 (en) 2000-07-21 2001-07-24 Ericsson Inc. System for increasing antenna efficiency
US20030098813A1 (en) * 2001-11-27 2003-05-29 Filtronic Lk Oy Dual antenna and radio device
JP2004040525A (en) 2002-07-04 2004-02-05 Sony Corp Device and method for transmitting video signal
EP1469550A2 (en) 2003-04-18 2004-10-20 Matsushita Electric Industrial Co., Ltd. Radio antenna apparatus provided with controller for controlling SAR (specific absorption rate) and radio communication apparatus using the same radio antenna apparatus
WO2005074070A1 (en) 2004-02-02 2005-08-11 Amc Centurion Ab Antenna device and portable radio communication device comprising such an antenna device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2102942A4 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8471768B2 (en) 2009-12-22 2013-06-25 Nokia Corporation Method and apparatus for an antenna
EP2348575A1 (en) * 2010-01-26 2011-07-27 Eaton GmbH Radio transmission assembly
EP2424033A1 (en) * 2010-08-26 2012-02-29 Research In Motion Limited Mobile wireless communications device having a frequency selective grounding circuit
US8180412B2 (en) 2010-08-26 2012-05-15 Research In Motion Limited Mobile wireless communications device having frequency selective grounding and related method
US8417300B2 (en) 2010-08-26 2013-04-09 Research In Motion Limited Mobile wireless communications device having frequency selective grounding and related method
US8666462B2 (en) 2010-08-26 2014-03-04 Blackberry Limited Mobile wireless communications device having frequency selective grounding and related method

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EP2102942A1 (en) 2009-09-23
CN101573833A (en) 2009-11-04
CN101573833B (en) 2013-07-10
US20100007563A1 (en) 2010-01-14
EP2102942A4 (en) 2009-12-23
US9246212B2 (en) 2016-01-26

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