WO2010138453A3 - Methods for reducing near-field radiation and specific absorption rate (sar) values in communications devices - Google Patents

Methods for reducing near-field radiation and specific absorption rate (sar) values in communications devices Download PDF

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Publication number
WO2010138453A3
WO2010138453A3 PCT/US2010/035961 US2010035961W WO2010138453A3 WO 2010138453 A3 WO2010138453 A3 WO 2010138453A3 US 2010035961 W US2010035961 W US 2010035961W WO 2010138453 A3 WO2010138453 A3 WO 2010138453A3
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
neighboring
absorption rate
specific absorption
antenna element
Prior art date
Application number
PCT/US2010/035961
Other languages
French (fr)
Other versions
WO2010138453A2 (en
Inventor
Mark T. Montgomery
Frnak M. Caimi
Paul A. Tornatta
Mark W. Kishler
Li Chen
Original Assignee
Skycross,Inc.
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 claimed from US12/750,196 external-priority patent/US8164538B2/en
Application filed by Skycross,Inc. filed Critical Skycross,Inc.
Priority to JP2012513154A priority Critical patent/JP2012528531A/en
Priority to KR1020117030224A priority patent/KR101727303B1/en
Priority to CN2010800338145A priority patent/CN102576936A/en
Publication of WO2010138453A2 publication Critical patent/WO2010138453A2/en
Publication of WO2010138453A3 publication Critical patent/WO2010138453A3/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
    • H01Q1/36—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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • H01Q21/293—Combinations of different interacting antenna units for giving a desired directional characteristic one unit or more being an array of identical aerial elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/04—Multimode antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/35—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • 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
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

A method is provided for reducing near-field radiation and specific absorption rate (SAR) values in a communications device. The communications device includes a multimode antenna structure transmitting and receiving electromagnetic signals and circuitry for processing signals communicated to and from the antenna structure. The antenna structure includes: a plurality of antenna ports operatively coupled to the circuitry; a plurality of antenna elements, each operatively coupled to a different one of the antenna ports; and one or more connecting elements electrically connecting the antenna elements at a location on each antenna element that is spaced apart from an antenna port coupled thereto to form a single radiating structure and such that electrical currents on one antenna element flow to a connected neighboring antenna element and generally bypass the antenna port coupled to the neighboring antenna element, the electrical currents flowing through the one antenna element and the neighboring antenna element being generally equal in magnitude, such that an antenna mode excited by one antenna port is generally electrically isolated from a mode excited by another antenna port at a given desired signal frequency range and the antenna structure generates diverse antenna patterns. The method includes adjusting the relative phase between signals fed to neighboring antenna ports of the antenna structure such that a signal fed to the one antenna port has a different phase than a signal fed to the neighboring antenna port to provide antenna pattern control and to increase gain in a selected direction toward a receive point. The method features using a transmit power lower than the transmit power used in a non-pattern control operation of the antenna structure such that the communications device obtains generally equivalent wireless link performance with the receive point using reduced transmit power compared to the non- pattern control operation, thereby reducing the specific absorption rate.
PCT/US2010/035961 2009-05-26 2010-05-24 Methods for reducing near-field radiation and specific absorption rate (sar) values in communications devices WO2010138453A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2012513154A JP2012528531A (en) 2009-05-26 2010-05-24 Method for reducing near field radiation and specific absorptance (SAR) values of communication devices
KR1020117030224A KR101727303B1 (en) 2009-05-26 2010-05-24 Methods for reducing near-field radiation and specific absorption rate(sar) values in communications devices
CN2010800338145A CN102576936A (en) 2009-05-26 2010-05-24 Methods for reducing near-field radiation and specific absorption rate (SAR) values in communications devices

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US18117609P 2009-05-26 2009-05-26
US61/181,176 2009-05-26
US12/750,196 2010-03-30
US12/750,196 US8164538B2 (en) 2007-04-20 2010-03-30 Multimode antenna structure

Publications (2)

Publication Number Publication Date
WO2010138453A2 WO2010138453A2 (en) 2010-12-02
WO2010138453A3 true WO2010138453A3 (en) 2011-03-03

Family

ID=43223319

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/035961 WO2010138453A2 (en) 2009-05-26 2010-05-24 Methods for reducing near-field radiation and specific absorption rate (sar) values in communications devices

Country Status (1)

Country Link
WO (1) WO2010138453A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102157778B (en) 2011-01-24 2015-04-01 中兴通讯股份有限公司 Method and device for realizing SAR (Specific Absorption Rate) control
US9578159B2 (en) * 2011-06-20 2017-02-21 Prasad Muthukumar Fisheye lens based proactive user interface for mobile devices
FR3013904B1 (en) 2013-11-28 2015-12-04 Commissariat Energie Atomique ELECTRONIC APPARATUS WITH RADIO ANTENNA FOLDED IN A CASE
CN114679198B (en) * 2022-03-09 2024-01-30 维沃移动通信有限公司 Antenna power adjustment method and device, electronic equipment and readable storage medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001031735A1 (en) * 1999-10-28 2001-05-03 Qualcomm Incorporated Balanced, retractable mobile phone antenna
US20050179607A1 (en) * 2004-01-14 2005-08-18 Interdigital Technology Corporation Method and apparatus for dynamically selecting the best antennas/mode ports for transmission and reception
US20060109192A1 (en) * 2004-11-22 2006-05-25 Steven Weigand Compact antenna with directed radiation pattern
US20080258991A1 (en) * 2007-04-20 2008-10-23 Skycross, Inc. Multimode Antenna Structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001031735A1 (en) * 1999-10-28 2001-05-03 Qualcomm Incorporated Balanced, retractable mobile phone antenna
US20050179607A1 (en) * 2004-01-14 2005-08-18 Interdigital Technology Corporation Method and apparatus for dynamically selecting the best antennas/mode ports for transmission and reception
US20060109192A1 (en) * 2004-11-22 2006-05-25 Steven Weigand Compact antenna with directed radiation pattern
US20080258991A1 (en) * 2007-04-20 2008-10-23 Skycross, Inc. Multimode Antenna Structure

Also Published As

Publication number Publication date
WO2010138453A2 (en) 2010-12-02

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