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20076363:2007-02-26:1008-8652(2007)02-10-06(710100),,,:;;;;:TN03:AStudyonEMCDesignofElectronicEquipmentZhangChunrong(XianElectronicEngineeringResearchInstitute,Xian,710100)Abstract:Thispaperintroducesthebasicconceptofelectromagneticcompatibility(EMC),analyzestheEMCdesigntechniqueoftheelectronicequipmentbycombiningtheexampleofdesigningultra2lowphasenoise,fast2frequency2hoppingfrequencysynthesizerforacertainradar,thensummarizessomeprac2ticalandeffectiveproceduresandpresentsthedevelopedachievementofthedesignexample.Keywords:EMC;radar;frequencysynthesis;phasenoise;fastfrequencyhopping1,EMC(ElectromagneticCompatibility),,,,,,,,,,,;;,EMC,EMCEMI(ElectromagneticInterference),EMI,EMC,(),,;(),22.1EMCEMCEMCEMCEMCEMC(012)EMC()EMCEMCEMIEMS(ElectromagneticSusceptibility)GB/T4365-1995EMC:EMC,(),2.2EMC,EMIEMSEMI:(1)EMC,;,,,,,,;EMI()1EMC()EMI:()(),(Maxwell),:,,,,EMI()(ITU)10kHz400GHz,EMC(30MHz),()EMI():(EMI),()EMIMaxwell,(dnl,l,1n)[3]:()krn1:Er-jIl4r32cosE-jIl4r32sinH=jIl4r2sin(3)(4)(5)()krm1:EjWIl4r2sine-jkrHjIl4r2sine-jkr(6)(7):E\E\H(2);A;(H/m);I(A);(m);k,k=2/;W,W=/,:W=12037711200763623EMCEMI:;;EMC,EMC()EMC3.1,,,EMC:,:(CW)()(LMF),(;);(),,EMCEMC,X:a.X(LO),1GHz40,-100dBc/Hz/kHz,-80dBc,-65dBc,1s,CW;b.X(TX),LO,;c.(LO2),L(CW);d.,TX;e.;f.:,EMC,EMC3.2EMC,,EMC,X,,3EMC,,,:,EMI,42123EMC4:ein=Asin((2f1)t+Bsin((2f2)t(8)eout=k1ein+k2e2in+k3e3in+knenin+(9),(eout),(f1+f2)(f1-f2),:fm,n=mf1nf2(10)m,n:(f1+f2)(f1-f2),(10)mn1EMI(),,f1f2()(),,,,EMC:,,3.3:EMI,,X,()EMIA1,B1()(),,EMI;,;EMIC1()(),(0dBm312007636);EMI-10dBm;:,,,EMID1EMI,,E1(),F1:3.4,5:(),S,EMI:,EMC,EMI,,:-80dBc6()563.5X,:X-110dBc/Hz/kHz,7;(),:-80dBc,-70dBc;0.8s412,X(),,,,,,EMC,,EMI3100MHz:-155dBc/Hz/kHz,(N):20logN(dB),N=100,20logN=40dB(4)f1f2:3dB10.30GHz:(-155)+40+3=-112(dBc/Hz/1kHz):7X4EMC,EMC,EMC,,EMC,:[1].X[R]..[2][C].,2003.[3].[M].:.[4]Markl.Montrose,.[M].:,2003.51