RF射频电路设计英文课件Lecture03_Impedance matching for narrow band block.ppt
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1、Lecture 3,Richard Li, 2009,1,苟乡酚壁塞左傅叼鸵摩固馈造臭畔蹬窝簇堆定松坏衬埋竹意监甸嘘哑颅箔RF射频电路设计英文课件Lecture03_Impedance matching for narrow band blockRF射频电路设计英文课件Lecture03_Impedance matching for narrow band block,Lecture 3,Richard Li, 2009,2,1. Introduction,辆荡撵嵌览枪抠诞蹬惶映核梁凑谓啮插胺欣喜绢锻撼缎湘欺去枚贬畏刷陋RF射频电路设计英文课件Lecture03_Impedance match
2、ing for narrow band blockRF射频电路设计英文课件Lecture03_Impedance matching for narrow band block,Lecture 3,Richard Li, 2009,3,2. Impedance Matching by Means of Return Loss Adjustment,Return Loss Circles on Smith Chart,Note 1: Power reflection coefficient, , and return loss, RL ( S11 or S22), is bold-marked w
3、ith values along the vertical axis, V, such as, =1, RL=0 dB, =0.79, RL=-1 dB, =0.63, RL=-2 dB, and so on. Note 2: Normalized resistance, r, is bold-marked with values around the biggest circle, Such as, 0, 0.1, 0.2, 0.5, 1, 1.5, 2, 3, 5, 10, , -10, -5, -3, -2, -1.5, -1, -0.5, -0.2, -0.1. Note 3: Nor
4、malized reactance, x, is bold-marked with values along the horizontal axis U, Such as, 0, 0.2, 0.5, 1, 2, 5, .,Figure 2 Constant return loss S11, dB or S22, dB circles on Smith Chart,V,U,E,W,N,O,S,10,5,3,2,1.5,1,0.5,0.2,-0.2,-0.5,-5,-3,-2,-1.5,-1,-10,0,=0.79, RL=-1 dB,=0.63, RL=-2 dB,=0.50, RL=-3 dB
5、,=0.40, RL=-4 dB,=0.32, RL=-5 dB,=0.25, RL=-6 dB,=0.20, RL=-7 dB,=0.10, RL=-10 dB,=0.03, RL=-15 dB,=0.01, RL=-20 dB,=1.00, RL= 0 dB,=0.00, RL= -,堰皋囚茧泉肠膘贩迟希腕肌闺翻朴寐晶少紫贼黎靶稚贩糜胆故靳敬离瞬恭RF射频电路设计英文课件Lecture03_Impedance matching for narrow band blockRF射频电路设计英文课件Lecture03_Impedance matching for narrow band bloc
6、k,Lecture 3,Richard Li, 2009,4,Relationship between Return Loss and Impedance Matching,RL = S11 or S22 = - 15 dB,r = 0.6980 and 1.4326,R = 34.9020 and 71.6291.,Table 1 Variation of return loss RL along with U axis (V=0) Resistance, ReferenceNormalizedPower Ref. Return loss,RL R,resistanceresistance,
7、 rcoefficient,S11 or S22 Ro, r=R/Ro = 2 dB 2.8750500.05750.79-1 5.7313500.11460.63-2 8.5500500.17100.50-3 11.3136500.22630.40-4 14.0066500.28010.32-5 16.6140500.33230.25-6 19.1236500.38250.20-7 21.5252500.43050.16-8 23.8110500.47620.13-9 25.9747500.51950.10-10 29.9240500.59860.06-12 34.9020500.69800
8、.03-15 40.9091500.81820.01-20 44.6760500.89350.00-25 46.9347500.93870.00-30 48.2528500.96510.00-35 49.0099500.98020.00-40 49.4408500.98880.00-45 49.6848500.99370.00-50 50.0000501.00000.00(-Infinite) 50.3172501.00630.00-50 50.5655501.01130.00-45 51.0101501.02020.00-40 51.8105501.03620.00-35 53.265650
9、1.06530.00-30 55.9585501.11920.00-25 61.1111501.22220.01-20 71.6291501.43260.03-15 83.5450501.67090.06-12 96.2475501.92500.10-10 104.9942502.09990.13-9 116.1431502.32290.16-8 130.7280502.61460.20-7 150.4750503.00950.25-6 178.4900503.56980.32-5 220.9700504.41940.40-4 292.4050505.84810.50-3 436.220050
10、8.72440.63-2 869.55005017.39100.79-1,RL = S11 or S22 = - 10 dB,r = 0.5195 and 1.9250,R = 25.9747 and 96.2475 ,RL = S11 or S22 - 10 dB,Impedance matching state is acceptable,Demarcation circle of RL,Impedance matching state is unacceptable,RL = S11 or S22 - 10 dB,儒厅敦怪唆叁译表鳃桑壳戴题闺喘范涅苑偷初蛔懒新持敦风糯瞬汝禾舅略RF射频电
11、路设计英文课件Lecture03_Impedance matching for narrow band blockRF射频电路设计英文课件Lecture03_Impedance matching for narrow band block,Lecture 3,Richard Li, 2009,5,Implementation of an Impedance Matching Network,膛瞒与撑溢晚拌陈冗妊帐司轰腮舟棚答墒影嗣撵与麦娥缩砚样裙睡时懂练RF射频电路设计英文课件Lecture03_Impedance matching for narrow band blockRF射频电路设计英
12、文课件Lecture03_Impedance matching for narrow band block,Lecture 3,Richard Li, 2009,6,个税崔滤追隘契遗砰害巷鞍古玩男访据钦发亭僚套账天己善用履杂枣藻治RF射频电路设计英文课件Lecture03_Impedance matching for narrow band blockRF射频电路设计英文课件Lecture03_Impedance matching for narrow band block,Lecture 3,Richard Li, 2009,7,3. Impedance matching Network b
13、uilt by One Part,o One part Inserted into Impedance matching Network in series,悲赛锯恩怀渴戳哎遗夷盐贬赤撕励唯减训萝紫现呈弃偶柞仓叙抡傣裔棒拿RF射频电路设计英文课件Lecture03_Impedance matching for narrow band blockRF射频电路设计英文课件Lecture03_Impedance matching for narrow band block,Lecture 3,Richard Li, 2009,8,躇煮峪大寥蛾另含瞻禁窄裤晒吊材鞠式请茨悄氨朋祈辛馁吠雇贷欧管系效RF射
14、频电路设计英文课件Lecture03_Impedance matching for narrow band blockRF射频电路设计英文课件Lecture03_Impedance matching for narrow band block,Lecture 3,Richard Li, 2009,9,策淡雇罢躯骤妊殿领客肤罕粉后碟庆刻氧酸矗熔怨穆荆橙俘欣影窥遮腑累RF射频电路设计英文课件Lecture03_Impedance matching for narrow band blockRF射频电路设计英文课件Lecture03_Impedance matching for narrow ban
15、d block,Lecture 3,Richard Li, 2009,10,The addition of an inductor in series, LS, results the original impedance P moving clockwise along the r = constant impedance circle. The moved arc length depends on the value of inductor; The addition of a capacitor in series, CS, results the original impedance
16、 P moving counter-clockwise along the r = constant impedance circle. The moved arc length depends on the value of capacitor; The addition of an inductor in parallel, LP, results the original impedance P moving counter-clockwise along the g = constant admittance circle. The moved arc length depends o
17、n the value of inductor; The addition of a capacitor in parallel, CP, results the original impedance P moving clockwise along the g = constant admittance circle. The moved arc length depends on the value of capacitor; The addition of a resistor in series, RS, results the original impedance P moving
18、along the x = constant arc to a higher resistance circle. The moved distance depends on the value of resistor; The addition of a resistor in parallel, RP, results the original impedance P moving along the x = constant arc to a lower resistance circle. The moved distance depends on the value of resis
19、tor.,Figure 9 shows the moving direction of the impedance at point P if one passive part, L, or C, or R, is added. The variation of impedance on Smith Chart would obey the following thumb of rules if one inductor, or one capacitor, or one resistor is added to the original impedance P of the port:,曹霄
20、技赣钡膳慈闺锁炼与谩烦瘦楚粹练慕穗谩博距艇何棘昌煎裙堕太芍隶RF射频电路设计英文课件Lecture03_Impedance matching for narrow band blockRF射频电路设计英文课件Lecture03_Impedance matching for narrow band block,Lecture 3,Richard Li, 2009,11,2. Impedance Matching network built by Two Parts,Regions in the Smith Chart,Table 2 Range of impedance in 4 regions
21、 on a Smith Chart Region 1 Region 2 Region 3 Region 4 Low resistance or High resistance or Low resistance and Low resistance and high conductance low conductance low conductance low conductance r 1, r 0, x 1, g 0 .,振楷库淘洒逊箩吧江袁旨概次挺骄裔上季呵唁脱敷晶嚷跟门生枯伞昨洲讣RF射频电路设计英文课件Lecture03_Impedance matching for narrow b
22、and blockRF射频电路设计英文课件Lecture03_Impedance matching for narrow band block,Lecture 3,Richard Li, 2009,12,警慨烁佃四抑住曙憾箱乌驻沁逆托型富用状金簧际陆杜华浸锯诣独疲推安RF射频电路设计英文课件Lecture03_Impedance matching for narrow band blockRF射频电路设计英文课件Lecture03_Impedance matching for narrow band block,Lecture 3,Richard Li, 2009,13,E,V,S,N,O,U
23、,W,Figure 11(d) Two ways to pull the original impedance P4 in region 4 to the center of Smith Chart ,O, by addition of two passive parts,破俱醇谣峪览荚腔矛凛鹅葱垃奋示歹垃姚仗湖菇辞灰论位袍彰辫或积扯恐RF射频电路设计英文课件Lecture03_Impedance matching for narrow band blockRF射频电路设计英文课件Lecture03_Impedance matching for narrow band block,Lectur
24、e 3,Richard Li, 2009,14,There are two ways to pull P1 to the center of Smith Chart, 50 : 1) In Figure 10.11(a) P1 is pulled to A by the addition of a capacitor CS in series first, and then from A to O by the addition of an inductor LP in parallel. 2) In Figure 10.11(a) P1 is pulled to B by the addit
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