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WO2008152180A1 - Internal antenna structure of mobile phone - Google Patents

Internal antenna structure of mobile phone Download PDF

Info

Publication number
WO2008152180A1
WO2008152180A1 PCT/FI2007/050358 FI2007050358W WO2008152180A1 WO 2008152180 A1 WO2008152180 A1 WO 2008152180A1 FI 2007050358 W FI2007050358 W FI 2007050358W WO 2008152180 A1 WO2008152180 A1 WO 2008152180A1
Authority
WO
WIPO (PCT)
Prior art keywords
ground plate
antenna structure
internal antenna
radiator
blocking element
Prior art date
Application number
PCT/FI2007/050358
Other languages
French (fr)
Inventor
Mika Tanska
Original Assignee
Elektrobit Wireless Communications Oy
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 Elektrobit Wireless Communications Oy filed Critical Elektrobit Wireless Communications Oy
Priority to PCT/FI2007/050358 priority Critical patent/WO2008152180A1/en
Publication of WO2008152180A1 publication Critical patent/WO2008152180A1/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
    • H01Q1/245—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 means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
    • 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
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the invention relates to an internal antenna structure of a mobile phone, a mobile phone, and a method of manufacturing an internal antenna structure.
  • An object of the invention is to provide an improved internal antenna structure of a mobile phone and a method of manufacturing such an antenna structure.
  • an internal antenna structure of a mobile phone comprising: a radiator element and a ground plate configured to form a monopole-type antenna; and a blocking element electrically coupled to the ground plate and configured to reduce ra- diation power entering user's head from the ground plate based on destructive interference between the ground plate and the blocking element.
  • a mobile phone comprising an internal antenna structure, wherein the internal antenna structure comprises: a radiator element and a ground plate configured to form a monopole-type antenna; and a blocking element electrically coupled to the ground plate and configured to reduce radiation power entering user's head from the ground plate based on destructive interference between the ground plate and the blocking element.
  • a method of manufacturing an internal antenna structure of a mobile phone comprising: configuring a radiator element and a ground plate to form a monopole-type antenna; coupling electrically a blocking element to the ground plate; and configuring the blocking element to reduce radiation power entering user's head from the ground plate based on destructive interference between the ground plate and the blocking element.
  • the invention provides several advantages.
  • the internal antenna structure provides with an efficient antenna for mobile phone radio communication with reduced radiation power towards the user's head.
  • Figure 2 illustrates an internal antenna structure from the top
  • Figure 3 is a perspective view of an internal antenna structure
  • Figure 4 shows a first example of a mobile phone according to an embodiment of the invention
  • Figure 5 shows a second example of a mobile phone according to an embodiment of the invention
  • Figure 6 is a flow chart presentation of an example of a methodology of manufacture of an internal antenna structure.
  • the internal antenna structure 100 includes a monopole-type antenna which comprises a ground plate 102 and a radiator element 106.
  • a radio frequency between the ground plate 102 and the radiator element 106 is generated by a modulating element (MOD) 108, such as a radio frequency front-end.
  • MOD modulating element
  • the ground plate 102 and the radiator element 106 are electrically and physically coupled to form a monopole-type antenna.
  • the radiator element 106 and the ground plate 102 are gal- vanically isolated from each other, or the impedance between the radiator ele- ment 106 and the ground plate 102 is very high at the operating frequency.
  • a monopole-type antenna provides advantages, such as a wider bandwidth, than a PIFA (Planar Inverted F-Antenna).
  • a monopole-type antenna may be sized smaller than PIFAs, thus making a monopole-type antenna an attracting choice for internal mobile phone antenna applications.
  • the monopole-type antenna is an antenna structure where the radiator element 106 extends from the ground plate 102 such that the radiator element 106 is substantially in a non-overlapping position relative to the ground plate 102 when observed from the direction of the normal of the ground plate 102.
  • Figure 1 illustrates such a configuration.
  • the monopole-type antenna may be made thin and configured suitable for internal mobile phone antenna applications.
  • the monopole-type antenna is a monopole antenna.
  • the monopole-type antenna is an inverted F-antenna (IFA).
  • the monopole-type antenna is an inverted L-antenna (ILA).
  • ILA inverted L-antenna
  • more than half of the radiator element 106 is in a non-overlapping position relative to the ground plate 102 when observed from the direction of the normal of the ground plate 102.
  • the radiator element 106 is made of conductive material, such as aluminium, copper, stainless steel, electrically conductive ink and/or magnesium.
  • the radiator element 106 is typically a planar member whose plane is separated from the plane of the ground plate 102. The plane of the radiator element 106 may be parallel to the ground plate 102. Such a situation is illustrated in an internal antenna structure 200 shown Figure 2.
  • the radiator element 106 may comprise a slot structure for provid- ing the radiator element 106 with desired frequency characteristics.
  • the ground plate 102 may be integrated into a circuit board, such as an engine printed wired board or a main printed wired board.
  • the radiator element 106 may be fixed to the substrate material extension 202 of the circuit board. In an embodiment of the invention, the radiator element 106 is fixed to the housing or other mechanics of the mobile phone.
  • the radiator element 106 is a conductive pattern formed on the surface of a printed circuit board of the mobile phone.
  • the ground plate 102 acts as a substantial source of electromagnetic radiation.
  • the internal antenna structure 100 also comprises a blocking element 104 electrically coupled to the ground plate 102.
  • a blocking element may also be referred to as a parasitic element.
  • the radio frequency electromagnetic waves emitted by the blocking element 104 and the radio frequency electromagnetic waves emitted by the ground plate 102 interfere destructively, thus reducing the radiation power entering the user's head.
  • the blocking element 104 is situated between the ground plate 102 and the user's head during a normal use situation of the mobile phone.
  • the blocking element 104 typically comprises a blocking radiator
  • the current phase of the blocking radiator 1 12 is opposite to that of the ground plate 102. In such a case, the electromagnetic waves emitted by the blocking radiator 1 12 at least partially cancel those emitted by the ground plate 102.
  • the blocking radiator 1 12 may be fixed to a separator part 114 which separates the blocking radiator 1 12 from the ground plate 102.
  • the separation between the ground plate 102 and the blocking radiator 1 12 may be in the order of a few millimeters, such as 2 to 3 millimeters. The relatively small separation enables the internal antenna structure to be implemented as a thin structure suitable for mobile phones.
  • the blocking element 104 is electrically coupled to a radiation concentration region 1 10 of the ground plate 102 and located between the ground plate 102 and the user's head in a use situation of the mobile phone.
  • the radiation concentration region may also be referred to as a hot spot, whose location may be predicted based on the dimensions of the ground plate and the wave length associated with the electromagnetic radiation, simulations, or by measuring the density of electromagnetic fields in the proximity of the ground plate 102.
  • the blocking element 104 is electrically coupled to the central region 204 of the ground plate 102 and located between the ground plate 102 and the user's head in a use situation of the mobile phone.
  • the blocking radiator 302 may be a planar structure parallel to the plane of the ground plate 102.
  • the blocking radia- tor 302 may further be shaped in a U-shape with open ends 308A, 308B.
  • the blocking radiator 302 typically comprises side stripes 310A, 310B which may be separated from each other as much mobile phone housing allows.
  • the open ends 308A, 308B are directed towards the radiator element 106.
  • FIG. 3 further shows an internal antenna structure 300 equipped with tuning elements 304A, 304B between the ground plate 102 and the blocking radiator 302.
  • the tuning elements 304A, 304B may be coils which affect the resonance frequency of the blocking radiator 302.
  • Figure 4 shows a mobile phone 400 with user interface components, such as a microphone 404 and an earpiece 402.
  • the cover 406 faces towards the user's head during normal use situation of the mobile phone 400.
  • the blocking element 302 is located between a cover 406 and the ground plate 102 in order to reduce the electromagnetic wave entering the user's head.
  • Figure 5 shows an embodiment, where the blocking element 302 is integrated into a keypad or keyboard mask or the inner surface of the front cover of the mobile phone 500.
  • Figure 6 embodiments of the method of manufacturing an internal antenna structure are illustrated with a flow chart presentation.
  • a radiator element 106 and a ground plate 102 are config- ured to form a monopole-type antenna.
  • the radiator element 106 extends from the ground plate 102 such that the radiator element 106 is in a non- overlapping position relative to the ground plate 102 when observed from the direction of the normal of the ground plate 102.
  • a blocking element 104 is electrically coupled to the ground plate 102.
  • the blocking element 104 is electrically coupled to the radiation concentration region 110 of the ground plate 102 and located between the ground plate 102 and the user's head in a use situation of the mobile phone. In an embodiment of the invention, the blocking element 104 is electrically coupled to the central region of the ground plate 102 and located between the ground plate 102 and the user's head in a use situation of the mobile phone. In an embodiment of the invention, the blocking element 104 is configured to provide a different current phase relative to the current phase of the ground plate 102, thus reducing radiation power from radiating towards the user's head.
  • the blocking element 104 com- prises a planar structure which acts as a blocking radiator 1 12 parallel to the plane of the ground plate 102.
  • the blocking radiator 1 12 is U- shaped with open ends 308A, 308B.
  • the open ends 308A, 308B are directed towards the radiator element 106.
  • the blocking element 104 is configured to reduce radiation power entering the user's head from the ground plate 102 based on destructive interference between the ground plate 102 and the blocking element 104.

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

Abstract

An internal antenna structure of a mobile phone comprises: a radiator element (106) and a ground plate (102) configured to form a monopole-type antenna; a blocking element (302) electrically coupled to the ground plate (102) and configured to reduce radiation power entering user's head from the ground plate (102) based on destructive interference between the ground plate (102) and the blocking element (302).

Description

Internal antenna structure of mobile phone
Field
The invention relates to an internal antenna structure of a mobile phone, a mobile phone, and a method of manufacturing an internal antenna structure.
Background
Physiological effects on nerve tissue due to electromagnetic fields generated by mobile phones have recently gained attention. It is believed that electromagnetic fields oscillating at radio frequency may damage the brain tis- sue of mobile phone users, and therefore it is worthwhile to consider techniques to reduce electromagnetic fields entering the head of a mobile phone user during the use of the mobile phone.
Brief description of the invention
An object of the invention is to provide an improved internal antenna structure of a mobile phone and a method of manufacturing such an antenna structure. According to an aspect of the invention, there is provided an internal antenna structure of a mobile phone, comprising: a radiator element and a ground plate configured to form a monopole-type antenna; and a blocking element electrically coupled to the ground plate and configured to reduce ra- diation power entering user's head from the ground plate based on destructive interference between the ground plate and the blocking element.
According to a second aspect of the invention, there is provided a mobile phone comprising an internal antenna structure, wherein the internal antenna structure comprises: a radiator element and a ground plate configured to form a monopole-type antenna; and a blocking element electrically coupled to the ground plate and configured to reduce radiation power entering user's head from the ground plate based on destructive interference between the ground plate and the blocking element.
According to another aspect of the invention, there is provided a method of manufacturing an internal antenna structure of a mobile phone, comprising: configuring a radiator element and a ground plate to form a monopole-type antenna; coupling electrically a blocking element to the ground plate; and configuring the blocking element to reduce radiation power entering user's head from the ground plate based on destructive interference between the ground plate and the blocking element.
The invention provides several advantages.
In an embodiment of the invention, the internal antenna structure provides with an efficient antenna for mobile phone radio communication with reduced radiation power towards the user's head.
List of drawings
In the following, the invention will be described in greater detail with reference to the embodiments and the accompanying drawings, in which Figure 1 shows an internal antenna structure from the side;
Figure 2 illustrates an internal antenna structure from the top;
Figure 3 is a perspective view of an internal antenna structure;
Figure 4 shows a first example of a mobile phone according to an embodiment of the invention; Figure 5 shows a second example of a mobile phone according to an embodiment of the invention; and
Figure 6 is a flow chart presentation of an example of a methodology of manufacture of an internal antenna structure.
Description of embodiments With reference to Figures 1 and 2, let us examine an example of an internal antenna structure 100 according to an embodiment of the invention. The internal antenna structure 100 includes a monopole-type antenna which comprises a ground plate 102 and a radiator element 106. A radio frequency between the ground plate 102 and the radiator element 106 is generated by a modulating element (MOD) 108, such as a radio frequency front-end.
The ground plate 102 and the radiator element 106 are electrically and physically coupled to form a monopole-type antenna. In a typical monopole-type antenna, the radiator element 106 and the ground plate 102 are gal- vanically isolated from each other, or the impedance between the radiator ele- ment 106 and the ground plate 102 is very high at the operating frequency. A monopole-type antenna provides advantages, such as a wider bandwidth, than a PIFA (Planar Inverted F-Antenna). Furthermore, a monopole-type antenna may be sized smaller than PIFAs, thus making a monopole-type antenna an attracting choice for internal mobile phone antenna applications. In this context, the monopole-type antenna is an antenna structure where the radiator element 106 extends from the ground plate 102 such that the radiator element 106 is substantially in a non-overlapping position relative to the ground plate 102 when observed from the direction of the normal of the ground plate 102. Figure 1 illustrates such a configuration. With this configuration, the monopole-type antenna may be made thin and configured suitable for internal mobile phone antenna applications.
In an embodiment of the invention, the monopole-type antenna is a monopole antenna. In an embodiment of the invention, the monopole-type antenna is an inverted F-antenna (IFA).
In an embodiment of the invention, the monopole-type antenna is an inverted L-antenna (ILA).
In an embodiment of the invention, more than half of the radiator element 106 is in a non-overlapping position relative to the ground plate 102 when observed from the direction of the normal of the ground plate 102.
The radiator element 106 is made of conductive material, such as aluminium, copper, stainless steel, electrically conductive ink and/or magnesium. The radiator element 106 is typically a planar member whose plane is separated from the plane of the ground plate 102. The plane of the radiator element 106 may be parallel to the ground plate 102. Such a situation is illustrated in an internal antenna structure 200 shown Figure 2.
The radiator element 106 may comprise a slot structure for provid- ing the radiator element 106 with desired frequency characteristics.
The ground plate 102 may be integrated into a circuit board, such as an engine printed wired board or a main printed wired board. The radiator element 106 may be fixed to the substrate material extension 202 of the circuit board. In an embodiment of the invention, the radiator element 106 is fixed to the housing or other mechanics of the mobile phone.
In an embodiment of the invention, the radiator element 106 is a conductive pattern formed on the surface of a printed circuit board of the mobile phone.
Below the 1 GHz region, such as in the 850/900 MHz region applied in GSM (Global System for Mobile communications), the ground plate 102 acts as a substantial source of electromagnetic radiation. With further reference to Figure 1 , the internal antenna structure 100 also comprises a blocking element 104 electrically coupled to the ground plate 102. A blocking element may also be referred to as a parasitic element. The radio frequency electromagnetic waves emitted by the blocking element 104 and the radio frequency electromagnetic waves emitted by the ground plate 102 interfere destructively, thus reducing the radiation power entering the user's head. For this, it is beneficial that the blocking element 104 is situated between the ground plate 102 and the user's head during a normal use situation of the mobile phone. The blocking element 104 typically comprises a blocking radiator
1 12 which produces a different current phase relative to the current phase of the ground plate 102, thus reducing radiation power from radiating towards the user's head. In an embodiment of the invention, the current phase of the blocking radiator 1 12 is opposite to that of the ground plate 102. In such a case, the electromagnetic waves emitted by the blocking radiator 1 12 at least partially cancel those emitted by the ground plate 102.
The blocking radiator 1 12 may be fixed to a separator part 114 which separates the blocking radiator 1 12 from the ground plate 102. The separation between the ground plate 102 and the blocking radiator 1 12 may be in the order of a few millimeters, such as 2 to 3 millimeters. The relatively small separation enables the internal antenna structure to be implemented as a thin structure suitable for mobile phones.
In an embodiment of the invention, the blocking element 104 is electrically coupled to a radiation concentration region 1 10 of the ground plate 102 and located between the ground plate 102 and the user's head in a use situation of the mobile phone. The radiation concentration region may also be referred to as a hot spot, whose location may be predicted based on the dimensions of the ground plate and the wave length associated with the electromagnetic radiation, simulations, or by measuring the density of electromagnetic fields in the proximity of the ground plate 102.
In an embodiment of the invention, the blocking element 104 is electrically coupled to the central region 204 of the ground plate 102 and located between the ground plate 102 and the user's head in a use situation of the mobile phone. With reference to Figure 3, the blocking radiator 302 may be a planar structure parallel to the plane of the ground plate 102. The blocking radia- tor 302 may further be shaped in a U-shape with open ends 308A, 308B. In such a case, the blocking radiator 302 typically comprises side stripes 310A, 310B which may be separated from each other as much mobile phone housing allows. In an embodiment of the invention, the open ends 308A, 308B are directed towards the radiator element 106.
Figure 3 further shows an internal antenna structure 300 equipped with tuning elements 304A, 304B between the ground plate 102 and the blocking radiator 302. The tuning elements 304A, 304B may be coils which affect the resonance frequency of the blocking radiator 302.
Figure 4 shows a mobile phone 400 with user interface components, such as a microphone 404 and an earpiece 402. In this case, the cover 406 faces towards the user's head during normal use situation of the mobile phone 400. Thus, the blocking element 302 is located between a cover 406 and the ground plate 102 in order to reduce the electromagnetic wave entering the user's head.
Figure 5 shows an embodiment, where the blocking element 302 is integrated into a keypad or keyboard mask or the inner surface of the front cover of the mobile phone 500. With reference to Figure 6, embodiments of the method of manufacturing an internal antenna structure are illustrated with a flow chart presentation.
In 600, the method starts.
In 602, a radiator element 106 and a ground plate 102 are config- ured to form a monopole-type antenna.
In an embodiment of the invention, the radiator element 106 extends from the ground plate 102 such that the radiator element 106 is in a non- overlapping position relative to the ground plate 102 when observed from the direction of the normal of the ground plate 102. In 604, a blocking element 104 is electrically coupled to the ground plate 102.
In an embodiment of the invention, the blocking element 104 is electrically coupled to the radiation concentration region 110 of the ground plate 102 and located between the ground plate 102 and the user's head in a use situation of the mobile phone. In an embodiment of the invention, the blocking element 104 is electrically coupled to the central region of the ground plate 102 and located between the ground plate 102 and the user's head in a use situation of the mobile phone. In an embodiment of the invention, the blocking element 104 is configured to provide a different current phase relative to the current phase of the ground plate 102, thus reducing radiation power from radiating towards the user's head.
In an embodiment of the invention, the blocking element 104 com- prises a planar structure which acts as a blocking radiator 1 12 parallel to the plane of the ground plate 102.
In an embodiment of the invention, the blocking radiator 1 12 is U- shaped with open ends 308A, 308B.
In an embodiment of the invention, the open ends 308A, 308B are directed towards the radiator element 106.
In 606, the blocking element 104 is configured to reduce radiation power entering the user's head from the ground plate 102 based on destructive interference between the ground plate 102 and the blocking element 104.
In 608, the method ends. Even though the invention has been described above with reference to an example according to the accompanying drawings, it is clear that the invention is not restricted thereto but it can be modified in several ways within the scope of the appended claims.

Claims

Claims
1. An internal antenna structure of a mobile phone, c h a r a c t e r i z e d in that the internal antenna structure comprises: a radiator element (106) and a ground plate (102) configured to form a monopole-type antenna; and a blocking element (104) electrically coupled to the ground plate (102) and configured to reduce radiation power entering user's head from the ground plate (102) based on destructive interference between the ground plate (102) and the blocking element (104).
2. The internal antenna structure of claim 1 , wherein the blocking element (104) is electrically coupled to a radiation concentration region of the ground plate (102) and located between the ground plate (102) and the user's head in a use situation of the mobile phone.
3. The internal antenna structure of claim 1 , wherein the blocking element (104) is electrically coupled to the central region of the ground plate
(102) and located between the ground plate (102) and the user's head in a use situation of the mobile phone.
4. The internal antenna structure of claim 1 , wherein the blocking element (104) comprises a blocking radiator (112) for providing a different cur- rent phase relative to the current phase of the ground plate (102), thus reducing radiation power radiating towards the user's head.
5. The internal antenna structure of claim 4, wherein the blocking element (104) further comprises a separator part (114) for separating the blocking radiator (112) from the ground plate (102).
6. The internal antenna structure of claim 4, wherein the blocking radiator (112) is a planar structure parallel to the plane of the ground plate (102).
7. The internal antenna structure of claim 4, wherein the blocking radiator (112) is U-shaped with open ends (308A, 308B).
8. The internal antenna structure of claim 7, wherein the open ends
(308A, 308B) are directed towards the radiator element (106).
9. A mobile phone comprising an internal antenna structure, c h a r a c t e r i z e d in that the internal antenna structure comprises: a radiator element (106) and a ground plate (102) configured to form a monopole-type antenna; and a blocking element (104) electrically coupled to the ground plate (102) and configured to reduce radiation power entering user's head from the ground plate (102) based on destructive interference between the ground plate (102) and the blocking element (104).
10. A method of manufacturing an internal antenna structure of a mobile phone, c h a r a c t e r i z e d by configuring (602) a radiator element and a ground plate to form a monopole-type antenna; coupling (604) electrically a blocking element (104) to the ground plate (102); and configuring (606) the blocking element (104) to reduce radiation power entering user's head from the ground plate (102) based on destructive interference between the ground plate (102) and the blocking element (104).
PCT/FI2007/050358 2007-06-14 2007-06-14 Internal antenna structure of mobile phone WO2008152180A1 (en)

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EP2439853A3 (en) * 2010-10-08 2014-05-07 BlackBerry Limited Mobile wireless communications device including spaced apart elongate members for reducing sar and related methods
WO2017018851A1 (en) * 2015-07-29 2017-02-02 Samsung Electronics Co., Ltd. Internal antenna of display

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DE10248756A1 (en) * 2002-09-12 2004-03-18 Siemens Ag Radio communications device for mobile telephones has a reduced specific absorption rate with a printed circuit board linked to an antenna to emit/receive electromagnetic radio radiation fields
US20040130492A1 (en) * 2002-02-27 2004-07-08 Kiyoshi Egawa Antenna device for radio apparatus
EP1796207A1 (en) * 2004-09-28 2007-06-13 Matsushita Electric Industrial Co., Ltd. Radio machine antenna device and portable radio machine

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EP1170821A2 (en) * 2000-07-05 2002-01-09 Sony Corporation Antenna device
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Cited By (11)

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US20110312393A1 (en) * 2010-06-18 2011-12-22 Motorola, Inc. Antenna system with parasitic element for hearing aid compliant electromagnetic emission
WO2011159416A1 (en) * 2010-06-18 2011-12-22 Motorola Mobility, Inc. Antenna system with parasitic element for hearing aid compliant electromagnetic emission
CN102948014A (en) * 2010-06-18 2013-02-27 摩托罗拉移动有限责任公司 Antenna system with parasitic element for hearing aid compliant electromagnetic emission
US8483415B2 (en) * 2010-06-18 2013-07-09 Motorola Mobility Llc Antenna system with parasitic element for hearing aid compliant electromagnetic emission
US20130273963A1 (en) * 2010-06-18 2013-10-17 Motorola Mobiltiy LLC Antenna system with parasitic element for hearing aid compliant electromagnetic emission
US8605922B2 (en) 2010-06-18 2013-12-10 Motorola Mobility Llc Antenna system with parasitic element for hearing aid compliant electromagnetic emission
CN102948014B (en) * 2010-06-18 2015-02-18 摩托罗拉移动有限责任公司 Antenna system with parasitic element for hearing aid compliant electromagnetic emission
EP2439853A3 (en) * 2010-10-08 2014-05-07 BlackBerry Limited Mobile wireless communications device including spaced apart elongate members for reducing sar and related methods
WO2017018851A1 (en) * 2015-07-29 2017-02-02 Samsung Electronics Co., Ltd. Internal antenna of display
US10153808B2 (en) 2015-07-29 2018-12-11 Samsung Electronics Co., Ltd. Internal antenna of display
US10574299B2 (en) 2015-07-29 2020-02-25 Samsung Electronic Co., Ltd. Internal antenna of display

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