通信射频电路4网络参数与分析13-14

1、1 jXRZ jBGY ab0NR2jXabjB2abGvZiiYv2111 112 2221 122 2vZ iZ ivZ iZ i11112112122222 vZZiiZZZiiv 3111 112 2221 122 2iY vY viY vY v11112112122222 iYYvvYYYvvi 11ZY,YZ 4511112112122222vhhiiHhhvvi 111112 2221122 2 vh ih vih ih v11111122222122 ivvhhHiivhh 111 112 2221 122 2 ih vh ivh vh i 11,HHHH61112(0)(0)

2、(BCBEBECEBBCBEBEBEBCEBCBErrvhvirrvrhivrr输入阻抗)电压反馈系数)2122(0)(11(0)(CBCBECEBBCBECBCEBCBECEirrhvirrihivrrr小信号电流增益)输出导纳)7111 212 222121 222 222vT vT iAvBiiT vT iCvDi1111222122212222vTTvTTiivvABTiiCD 211 112111221 122111v Tv TiAv BiiTv Ti Cv Di 2111121221221111vvTTiiTTvvABTiiCD 11,TTTT8910111213( )2sin()

3、 ( )/2cos()/j lj lj lj loov lv eejvli lv eeZvlZ( )2cos() ( )/2sin() /jljljljloov lveevli lveeZjvlZ1221221221222co s()(0 )co s()22sin ()(0 )sin ()2/ 2sin () /(0 )sin ()22co s() /(0 )co s()2/oooooovvlAilvvvjvlBvjZlivZjvlZiCijYlvvvlZiDvlivZ141516171819nno nob =(V -Z I )/2 Znno noa =(V +Z I )/2 Z20nnnoI

4、 =(a -b )/ Z nonnV = Z (a +b )22*nnnnnP =Re(V I )/2=( ab)/2+nnono-nnonoa =V / ZIZb =V / ZIZ +-+-nnno no nV =V +V =Z IZ I111121212222bSSaSSab 21222311RL=-20log S()dBin11ininS =ooZZZZ20221222110 102010 10202110 10 10/S =(0)(0)()/22/()/2/2()/GGVZbaVIaVZ IZVZVZ IZVZVVVZ IZ IZ2421G=20log S()dB10112111220

5、201012202020/S=(0)(0)() / 22/2() /GGVZbaVIaVZ IZVZVVVZ IZ IZ22RL=-20log S()dBout22outoutS =ooZZZZ2512G=20log S()dB-nnn+nnV=(0,)Vamn nbamnS22+22nnn0022nVVP=(1)(1)22a(1)2nn nn nin cre fSZZSPP nnnnn1+ SV SW R=1- S272811112111222122212221AAABBBAABBBAaTTTTaTTTTbb 29111212221=(0)bbSTaS111121212222AAAAAAAAbSSaSSab122122221=(0)aSTbaS 111121212222BBBBBBBBbSSaSSab111221221222221()=(0)bS SS STbaS11122211=(0)baTaS3031abblaabZssabVss32Sa1a2b2b1a1b1a2b2S11S2233S21S32V1V2V3S21S32V1V334V1V2SaSbSa+SbV1V235S21S32V1V2V3S22S32V1V2V3S21S32V1V2V3S42V4S21S32V1V2V3V4S42S21V236S11S22S12S21a1