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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”

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

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

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

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

ScopeofthetalkScope of the talk

?Introduction & historical review?Practical considerations & design flowPracticalconsiderations&designflow?State of the art

ScopeofthetalkScope of the talk

?Introduction & historical review?Practical considerations & design flowPracticalconsiderations&designflow?State of the art

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

ChallengesGo wireless!!!… but please provide:?Small antennas?Internal antennasInternalantennas?Light weight?Cheap?Multi-bandMultiband

?Multi-antenna systems

Whichmeans…Which means…

HandsetevolutionHandset evolution

Size

WeightPrice

FunctionalityDesign

1990

2000

2010

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

Nokia 8810 (1998)

Source:wwwwiredcomSource: www.wired.com

Meetthepioneer!Meet the pioneer!

Hagenuk Global Handy (1996):

The first GSM-phone with an integrated antenna!

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!!!

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

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

ScopeofthetalkScope of the talk

?Introduction & historical review?Practical considerations & design flowPracticalconsiderations&designflow?State of the art

MobilehandsetdevelopmentMobile handset development

CONCEPT

Concept &Ct&

preliminarydesign

INTEGRATIONPRODUCTION

Marketing& sales

Development

Optimisation& integrationIndustrialisationHard tool goQualificationRamp upMassproductionProductupgrade

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

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!!!

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