电子科技大学通信射频电路 射频放大器 29-32

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1、1 2345viC1RbvbC2RLRcC3v0Vc6VsRsRiIiIiRoRLiissiRRRVVissiRRVILoLoioRRRRIV)(isiLoiissLoLoiioVRRRRRRRRVRRRRIVVGiLVRRG278oViVGV20lg()oViVGdBViIIGoi)(lg20dBIIGioiiViiooiopGGIVIVPPG)(lg10dBPPGiop9102222(1)(1)21sinincinininsbPP 01110(1)ssssinsZbVbabZZ 2212221sincinsbbP 222*22()(1)212(1)sssAincinininssbbPP 1

2、1222222122(1)(1)/(11)LtsLinsLAPGSSP 22222122(1)/(1)(1)LpLinLinPGSSP 22222111(1)/(1)(1)LAAsoutsAPGSSP 12fLfHflgA(f)180f1314()nIMdBcN阶交调分量幅度基波幅度151:13:1输出射频功率消耗DC功率PAE 输出射频功率-输入射频功率消耗DC功率16avP平均输出射频功率平均消耗DC功率(1)PAEp1G)20logininRL r1in1P-10log(P)20logoutoutRL r2in2P-10log(P1711outVSWR outmax-outmin-out

3、outVV11inVSWR inmax-inmin-ininVV18 11221221S SS S 2221122122112SSKS S 19)/()1 (2112*1122211SSSSSMul)/()1 (2112*2211222SSSSSMus20 2112,1SMSGKS 22112(1),1SMAGkkKS 21 211211221LinLS SSS211222111soutsS SSS 1in2112112211LLS SSS12212222LS SrS *22112222LCSSS 1out2112112211sLS SSS12212211SS SrS *11222211SCSSS 2223点点 24252222121122(1)(1)1TSLSLSLSGSS 1222221211220(0)(1)(1)(1)(1)TUTSLSLSLGGSSSSG G G 221111SSSGS 2021GS222211LLLGS 26272829303132333435 3637383940viC1R1/I1VbQC2RLRcC3v0VcR2IcQReCe41Vb1VcI1I2Vb24243) )444546474849.50