电子科技大学：《无线系统中的微波与射频 Microwave and RF Design in Wireless Systems》课程教学资源（课件讲稿）ch06 Amplifiers 放大器

To conclude 1 ●●● ●●●● ●●●●● 5.1 Filter Design by the Insertion Loss Method ●●●0 ●●●●0 PLR ● Power Loss ratio: ● Equal ● ripple Pn= 1 PLR= PLood 1-T() Maximally fat Maximally flat response(Butterworth) 05 1.0 1.5 ww. (for0>>0) 8N+1=1 R0=80=1 =8别 W-0 YY Equal-ripple response (Chebyshev) 宁C=81 卡C3=8的 Px=1+kT (for @>0.) Nis odd, 8w+1=1 \2N Limear phase response:( is even,gw+l≠l The group delay) 1

To conclude - 1 §5.1 Filter Design by the Insertion Loss Method Power Loss ratio: Maximally flat response (Butterworth) Equal-ripple response (Chebyshev) Linear phase response: The group delay N is odd, N is even, •1   2 1 1 in LR Load P P P      2 2 1 N LR c P k           2 2 ( ) N LR c c P k for             1 1 N g   2 2 1 LR N C P kT           2 2 2 ( ) 4 N LR c C k P for             1 1 N g   1 1 N g     2 1 N C A P                       2 1 21 N C d A PN d                     

PLR To conciude 2 Equal ripple 5.2 Filter Scaling and Transformation PL典 flat 1+k C Ck R0=80=1 =8 RoWc M-o- 0 LPF G8 卡C=8 -←→0 00 ←→0 -101 HPF 00 PLR PLR BSF 00 ，=@0，生 02-0 BPF 00 @ok 00 AC C元 △*00 OLk 入*0g

To conclude - 2 LPF BSF HPF BPF §5.2 Filter Scaling and Transformation ' 0 0 ,' ; *k k k k L L C   L     ' 0 0 1 , ' k k k k L L C   L     •2 c     0 0 1               1 0 0 1               

To conclude 3 ●●● ●●●● ●●●●● ●●●● 1.Richard's Transformation L,Ctransmission line ●●●●0 ●●●● 2=gBl=g(ol/yp):2→ol1→1→gB1=1→1=元/8ato。° 2.Kuroda's Identities (for LPF and BSF) Series stub->shunt stub. 1 L=33487L=33487 500 502 Mom YYY-9 21752 21750 ÷C=0.717 64.90 70.3Q 6.90 a 3.K-J Inverter (for BPF and BSF): Series Resonator->shunt resonator. 一A/4 A/4 Zo=K Yo=J K=1/wC J=WC 3

To conclude - 3 1. Richard’s Transformation 2. Kuroda’s Identities (for LPF and BSF) L，C→ transmission line Series stub→shunt stub. 3 3. K-J Inverter (for BPF and BSF): Series Resonator→shunt resonator

●●● ●●●● Microwave and RF ●●●● ●●●● ●●●●0 ●●●● ●●●● Design of Wireless ● Systems Chapter 6 Amplifiers 放大器 Dr.Xian Qi Lin 5

Microwave and RF Design of Wireless Systems Chapter 6 Dr. Xian Qi Lin Amplifiers 放大器 5

●●● ●●●● ●●●●心 ●●●● Antenna ●●●●0 ●●●● IF Bandpass Power ●●●● Data Modulator filter Mixer filter ampiifier ● in Local Radio transmitter oscillator Antenna Low Bandpass noise F IF filter amplifier Mixer filter amplifier Demedulator Data out Local Radio receiver oscillator Block diagram of a basic radio system 6

Radio transmitter Block diagram of a basic radio system Radio receiver 6