●●● ●●●● To conclude -1 ●●●●● ●●●0 Lossless ●●●●0 Y=(R+j@L)(G+j@C) joLC=a+j ●●●0 §2.1 Transmission line ●●●0 > R+joL ●● Vc 红0 e自 edu,力 NG+joC 2π 2π 1 0 = (.) GA: B√C LC fLC I(-0 Z气+2g1 V(-) Z+jZotgBI V VSWR= max 1+=S 1-r Zo:B 0 =R+R4x+X可 R+joL G+j@C §2.2The,Smith.Chart 不。 B>0 容性 感性 T= le/-w Z-1 B=05 B=1 G=0. G=1 (0,0) (1,0 (0,∞) Ta 1+r (0,0) (1,0) 匹配点 短路点 匹配点 开路点 S 1- 开路点 短路点 B=- 电压波刊 电压波腹 1+ 电流波节 电流波腹 Rmin-K Rmax-S Gmin-K B=-0. Gmax-S <0容性 1-r B<ol 感性 1
To conclude - 1 §2.1 Transmission line §2.2 The Smith Chart 1 0 R j ωL L Z G j ωC C Lossless ( )( ) R j L G j C j LC j 0 R jL L Z G jC C 22 1 LC f LC 1 p v LC max min 1 1 V VSWR S V L 0 0 0 ( ) ( ) in L V l Z jZ tg l Z Z I l Z jZ tg l 2 2 2 1 2 ( )( ) in l g in g in g R P V RR X X 1 4 1 L j l L Z e Z 1 1 S 1 1 Z
●●● ●●●● To conclude -2 ●●●● ●●●● ●●●●0 ●●●● S 2.3 Microwave Network Analysis 2g/4 ●●●● ● Zc S 2.4 Impedance Matching min 1.The quarter-wave transformer 利用电压波节点 g/4 1=A/4+2,a-012)t6Z.=2☑ n Zcl 2.Matching using L-section Zc 流 利用电压波腹点 Zin jZctgBl Zin =-jZectg Bl 3.Single-stub Tuning 肉 Narrow bandwidtly 开路 并联电容 短路 并联电感 2 Open o shorted
To conclude - 2 3. Single-stub Tuning / 4 2 n l ' ， Z L Z Zc L (n=0,1,2…) at f0 , Narrow bandwidth 2. Matching using L-section 1. The quarter-wave transformer §2.4 Impedance Matching 2 §2.3 Microwave Network Analysis 利用电压波节点 g / 4 Zc Zmin Z L Zc1 利用电压波腹点 Zmax Z L Zc1 Zc g /4 开路 并联电容 短路 并联电感 Zc ZL =0 for k i k i ii V i V S V =0 for k j k i ij V j V S V c Zin c j Z tg l Zin c jZ g l t
5 ● To conclude -3 ● 56.0 ● Impedance Matching ● ● g/4 Z C1 g/4 R>Z 电路结构 Z Zer R g14 R<Z Z.g/4 Wide bandwidth 2g/4 Zo Zo2 Z 84 Z2) Z=R Ri>Ze R.<Zc 3
To conclude - 3 Wide bandwidth Impedance Matching 3
●●● Microwave and RF ●●●● ●●●● ●●●● ●●●● ●●●● Design of Wireless ●●●● ● Systems Chapter 3 Noise and Distortion in Microwave system 微波系统中的噪声和失真 Dr.Xian Qi Lin 5
Microwave and RF Design of Wireless Systems Noise and Distortion in Microwave System 微波系统中的噪声和失真 Chapter 3 Dr. Xian Qi Lin 5
●●● ●●●● ●●●● ●●●● ●●●● Noise determines the threshold for the minimum ●●●0 ●●● signal level that can be reliably detected by a receiver. 噪声决定了一个接收机中能够被检测的最小信号电平 Source来源： 1.Generated internally by the receiver circuitry, such as thermal noise.来自于接收机内部电路，比如热噪声 2.From external environment,such as atmosphere, interstellar,man-nade interference..来自于外部，比如大气、星 际和人为的干扰。 ●Noise is a random process..噪声是一个随机过程 6
Noise determines the threshold for the minimum signal level that can be reliably detected by a receiver. 噪声决定了一个接收机中能够被检测的最小信号电平 Source来源: 1. Generated internally by the receiver circuitry, such as thermal noise.来自于接收机内部电路，比如热噪声 2. From external environment, such as atmosphere, interstellar, man-made interference.来自于外部，比如大气、星 际和人为的干扰。 Noise is a random process.噪声是一个随机过程 6