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Design of antennas for mobile Designofantennasformobilecommunications devices: practical aspects.Marta Martínez VázquezIMST GmbHIEEE AP-S DistinguishedLectureAugust 2011Acknowledgements
?Rens Baggen, Winfried Simon, Andreas Winkelmann(IMST)?Dirk Manteuffel (U. Kiel)
?Jan Carlsson, KristianKarlsson(SP)?Cyril Luxey (U. Nice Sophia-Antipolis)?Zhinong Ying (Sony-Ericsson)?JussiRahola (Optenni)Rahola(Optenni)?Jaume Anguera (FractusS.A.)?EURAAPSWG“SmallSmall AntennasAntennas”
2mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
IMSTGmbH:facts&figuresIMST GmbH: facts & figures?Foundation: Foundation:?Staff: ?Headquarters: 1992150 employees (110 engineers / PhD)Kamp-Lintfort, GermanyBerlinNorthRhineWestfaliaBonnKamp-LintfortIMSTDüsseldorfBonn3mmv, IEEE-DLP2011 ? IMST GmbH -All rights reservedTargetmarketsTarget markets
?Telecom and IT?Automation ?AutomotiveAtti?Medical Device?Security?Space
4mmv, IEEE-DLP2011 ? IMST GmbH -All rights reserved
EMmodellingtoolsEM modelling tools
Library for multilayered elements
IntegratedinAgilentADSTMIntegrated in Agilent ADS
Fullwave3DFDTDsimulationFull wave 3D FDTD simulation
For ADSTM
Coplanar element library
Integrated in Agilent ADSTM
5mmv, IEEE-DLP2011 ? IMST GmbH -All rights reserved
In-houseInhouse technology & prototypingtechnology&prototyping
?Clean rooms: class 100 to 10,000Cleanrooms:class100to10000?Thin film and thick film technology?Hybrid circuits, bondingyg?Etching techniques?Fast prototyping?LTCCcapabilities
6mmv, IEEE-DLP2011 ? IMST GmbH -All rights reserved
Measurements&testingMeasurements & testing
?Indoor nearfield/ farfield
?3D air-interface characterisation of mobile
devices?Specific Absorption Rate (SAR)SpecificAbsorptionRate(SAR)?RFmeasurements up to 110 GHz?CE certification
DAT-P-152/98-01
7mmv, IEEE-DLP2011 ? IMST GmbH -All rights reserved
ScopeofthetalkScope of the talk
?Introduction & historical review?Practical considerations & design flowPracticalconsiderations&designflow?State of the art
8mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
ScopeofthetalkScope of the talk
?Introduction & historical review?Practical considerations & design flowPracticalconsiderations&designflow?State of the art
9mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
MobilemarketMobile marketDayly newspapers480mInternet users1.4bnTV setsTVsets1.5bnMobile phones4bn4bn mobiles worldwide = half of the population of the planet!!!10mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
Requirements
UUser / market/kt?Small dimensions ?Low weight ?Low SAR levelsLowSARlevels?Low cost ?High efficiency
Service providers / Siid/
networks:?Multiband capability?Broadband operation?Robust to changes in the environment?Optimised use of the
availablechannelcapacityavailable channel capacity
16mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
ChallengesGo wireless!!!… but please provide:?Small antennas?Internal antennasInternalantennas?Light weight?Cheap?Multi-bandMultiband
?Multi-antenna systems
17
mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
Whichmeans…Which means…
18mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
HandsetevolutionHandset evolution
Size
WeightPrice
FunctionalityDesign
1990
2000
2010
19mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
Fromadifferentpointofview…From a different point of view…?Last 15 years: impactypoflaptopsppandmobile phonesp?Weightdroppedby57 percentin thelast twoyears!?Reason: Rsmartphonesth!43.53Weight (kg)2.52151.510.501990199520002006200820103.53.3MP3, iPodMobile phoneLaptop,organiserSmartphone1.61.21.4151.520mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
FromexternaltointegratedFrom external to integrated
11.22.
Use of patch antennas Useofpatchantennasinstead of insteadofwhips
Ergonomics:tapering and weighting taperingandweightingto encourage users to hold it below the antenna
Plastic casing: part of the cover made of plastic
3.
Nokia 8810 (1998)
Source:wwwwiredcomSource: www.wired.com
21
mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
Meetthepioneer!Meet the pioneer!
Hagenuk Global Handy (1996):
The first GSM-phone with an integrated antenna!
22
mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
ProblemswiththelawProblems with the law
?MooreMoore‘ss law: law:
?The number of transistors that can be placed inexpensively on an integrated circuit has doubled approximately every two years?
?Antennas don't follow Moore's law ?Maxwell‘s laws!!!
23mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
FrommobiletosmartphoneFrom mobile to smartphone
Motorola 8900 (1997)()First dual band GSM phone
130 x 59 x 25 mm
248 gg
iPhone 4 (2010)
5bdGSM/UMTS5-band GSM/UMTS+ Bluetooth/Wi-Fi + GPS
115 x 59 x 9 mm137grams137 grams
24mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
HandsetevolutionHandset evolution
?GSM 900/1800
?Battery type: NiMH950 mAh?Battery life:
?Standby time: 100-130 hours ?Talk time: 330-420 minutes
?Time of full re-charging: 90 minutes ?LCD display with the resolution of LCDdisplaywiththeresolutionof96х32 pixels, which can show up to 4 text lines, one line with icons ?Phonebook: 100 phone numbers + SIM-card memory. ?The list of the last 10 Thelistofthelast10received/dialedcalls ?16 menu languages
?User's menu configuration ?Vibrating alert ?Speed dialing?Autodial ?Fax ?SMS
?Dimensions: 130x59x34Dimensions:130x59x34mm3?Weight: 248 g.
Source: www.apple.com
25
mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
ScopeofthetalkScope of the talk
?Introduction & historical review?Practical considerations & design flowPracticalconsiderations&designflow?State of the art
26mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
MobilehandsetdevelopmentMobile handset development
CONCEPT
Concept &Ct&
preliminarydesign
INTEGRATIONPRODUCTION
Marketing& sales
Development
Optimisation& integrationIndustrialisationHard tool goQualificationRamp upMassproductionProductupgrade
27mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
DesignflowDesign flow
Antenna design process
Antennaconcept/SimulationAntenna concept / Simulation
Test hardwareFirst MeasurementsDemonstrator (electrical properties) Antenna development process MechanicaldesignoftheantennaMechanical design of the antenna
Technology & contacting
Prototyping
Production and delivery
28mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
CustomerrequirementsCustomer requirements
?Pre-defined mobile phone?Antenna functionalityAtftilit?Available space / Shape
?Pre-defined position of feed contacts Pre-definedpositionoffeedcontacts
?Interaction necessary with other design departments (circuits, mechanics…)?Antenna design should start at the same time as handset development!!!
29mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
TypesofmobilephonesTypes of mobile phones
TypicalPlatformsandAntennaConceptsofMobilePhonesTypical Platforms and Antenna Concepts of Mobile Phones
Bar phone with integrated antenna
Flip-phone with external antenna
Bar phone withhelix antenna
Slide phone withintegrated antenna
30mmv, IEEE AP-S DLP2011 ? IMST GmbH -All rights reserved
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