User's Manual

Rev 1.1 Mar.06 13

3: RF Integration

RF connection

Considerthefollowingwhenattachinganantennatothe

module:

Note: To disconnect the

antenna, make sure you use the

Hirose U.FL connector removal

tool (P/N UFL-LP-N-2(01) to

prevent damage to the module

or coaxial cable assembly.

• UseaHiroseU.FLconnector(model

U.FL #CL331‐0471‐0‐10)toattachanantennatoa

connectionpointonthemodule,asshowninFigure 3‐1

(ThemainRFconnectoronthetopside;thediversityRF

connectoronthebottomside).

• Matchcoaxialconnectionsbetweenthemoduleandthe

antennato50 Ω.

• MinimizeRFcablelossestotheantenna;therecommended

maximumcablelossforantennacablingis0.5 dB.

Figure 3-1: Antenna connection points and mounting holes

Ground connection

Whenconnectingthemoduletosystem ground:

• Preventnoiseleakagebyestablishinga verygoodground

connectiontothemodulethroughthehostconnector.

• Connecttosystemgroundusingthetwomountingholesat

thetopofthemodule(asshowninFigure 3‐1).

• MinimizegroundnoiseleakageintotheRF.

Dependingonthehostboarddesign,noisecouldpotentially

becoupledtothemodulefromthehostboard.Thisis

mainlyanissueforhostdesignsthathavesignalstraveling

alongthelengthofthemodule,orcircuitryoperatingat

bothendsofthe

moduleinterconnects.