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Multi‐TechSystems,Inc.MultiModemCellUserGuide 21

Appendix B - Cellular Information

AntennaSystemforCellularDevices

Wirelessperformancedependsonimplementationandantennadesign.Theintegrationoftheantennasystem

intotheproductisacriticalpartofthedesignprocess;therefore,itisessential toconsideritearlyso

performanceisnotcompromised.IfyoumakechangestothecertifiedantennasystemoftheMultiModem,

thenrecertifi

cationisrequiredbyspecificnetworkcarrierssuchasSprint.Theantennasystemisdefinedasthe

UFLconnectionpointfromtheMultiModemtothespecifiedcablespecificationsandspecifiedantenna

specifications.

FCCRequirementsfortheAntenna

Theantennagain,includingcableloss,fortheradioyouareincorporatingintoyourproductdesignmustnot

exceedtherequirementsat850MHzand1900MHzasspecifiedbytheFCCgrantformobileoperationsand

fixedmountedoperationsasdefinedin2.1091and1.1307oftheFCCrulesforsatisfyingRFex

posure

compliance.Theantennausedfortransmittingmustbeinstalledtoprovideaseparationdistanceofatleast

20cmfromallpersonsandmustnottransmitsimultaneouslywithanyotherantennatransmitters.Userand

installersmustbeprovidedwithantennainstallationinstructionsandtransmit teroperatingconditionsto

satisfyingRFexposurecompliance.

AntennaSpecifications

CDMA/EVDOAntennaRequirements/Specifications

FrequencyRange

824

–

894MHz/1850

–

1990MHz

Impedance

50Ohms

VSWR

VSWRshallnotexceed2.0:1atanypointacrossthebandsofoperation

TypicalRadiatedGain

3dBionazimuthplane

Radiation

Omni‐directional

Polarization

Vertical

TRP/TIS

Thetotalradiatedpower(TRP)attheantennashallbenolessthan+21/20dBmforPCS/Cell

channelsrespectively,andthetotalisotropicsensitivity(TIS)attheantennashallbenoless

than‐104/104dBmforPCS/Cellchannelsrespectively.

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