17微波传输线匹配理论

17微波传输线匹配理论 实验十七 微波传输线匹配理论 一、实验目的 1. 了解基本的阻抗匹配理论及阻抗变换器的 设计 领导形象设计圆作业设计ao工艺污水处理厂设计附属工程施工组织设计清扫机器人结构设计 方法 快递客服问题件处理详细方法山木方法pdf计算方法pdf华与华方法下载八字理论方法下载 。 2. 利用实验模组实际测量以了解匹配 电路 模拟电路李宁答案12数字电路仿真实验电路与电子学第1章单片机复位电路图组合逻辑电路课后答案 的特性。 3. 学会使用软件进行相关电路的设计和仿真，分析结果。 二、预习 内容 财务内部控制制度的内容财务内部控制制度的内容人员招聘与配置的内容项目成本控制的内容消防安全演练内容 1( 熟悉微波课程有关阻抗匹配的理论知识。 2( 熟悉微波课程有关阻抗变换器的理论知识。 三、实验设备 项次 设备名称 数量 备注 1 微波扫频仪 1套 2 微波功分器 1只 3 50Ω BNC 连接线 2条 四、理论分析 (一) 基本阻抗匹配理论: 如图1(a)所示:输入信号经过传输以后，其输出功率与输入功率之间存在以下关 系，信号的输出功率直接决定于输入阻抗与输出阻抗之比。 2V2SPout,I,R,,RLL2Rs Vout (R，R)SL 2VS R,k,RP,Vs LSinRR LS k,P,,Poutin2(1，k) 图1(a) : 输出输入功率关系图 输出功率与阻抗比例的关系图见图14,1(b)。 that the wiring is correct, the operation is flexible, auxiliary contact is accurate. 11 current and voltage circuits check: current transformer wiring is correct, correct polarity, the secondary side are not allowed to open. 5.3.2.2 debugging 12 wiring insulation resistance test methods: secondary circuit insulation resistance must be greater than 1M (use 500V megohmmeter to check). 2 control loop simulation action test: disconnect electrical line of main loop switch outlet at, motor, electrical equipment not by electric, connected control power, check the Department of voltage whether meet provides, lights following electrical, work whether normal; operation the button or switch, corresponding of the following electrical, and contact device of sucking collection and release are should quickly, the related lights indicates to meet drawings requirements; with artificial simulation of method try moving the protection components, should can achieved quickly, and accurate, and reliable of protection function; manual the trip switch, Check its limited bit role of directional and the reliability; on has electrical joint lock link of equipment, should according to principle figure check chain function anti-mine grounding system debugging 5.3.3.1 grounding resistance of test method following figure by shows, along was measuring grounding very E' makes potential detection needle P' and current detection needle C' according to line each other apart 20m, insert to in the, and 实验十四 匹配理论 1 0.75 输 出 Poutk()0.5功 率 Output Power0.25 0k ratio of RL to Rs ( k = RL / Rs )K=R/R LS 图1(b)输出功率与阻抗比的关系 由图1(b)可知，当R=R 时可获得最大输出功率，此时为阻抗匹配状态。 推而广之，LS*如图1(c)所示，当输入阻抗Z 与负载阻抗Z间有Z=Z的关系时，满足广义阻抗匹配SLSL 的条件。所以，阻抗匹配电路也可以称为阻抗变换器(Impedance Transformer)。 Pout Zs ZVs L Z L*当Z=Z,即是[匹配](Matched) LS 图1(c) : 广义阻抗匹配关系图 (二) 阻抗变换器的设计原理: 阻抗变换器的设计方法，根据使用元件及工作频率高低，大致可分为无源元件型(Lumped Device Type)和传输线型(Transmission Line Type)两种。 ?.无源元件型 此种电路是利用电感及电容来设计。根据工作频宽的大小，基本上可分为L 形(L-Network)、T形(T-Network)及П(П-Network)等三种。 (A) L形匹配电路(L-type Matching Network) 步骤一:决定工作频率fc、输入阻抗R及输出阻抗R。 S L Q=Xs / Rs S Pout Rs Xs Vs X LR L R RLS Q= R / X L LL 图 2(a) L型 匹 配 电 路 : Rs < RL : C' according to line each other apart 20m, insert to in the, andounding very E' makes potential detection needle P' and current detection needle mine grounding system debugging 5.3.3.1 grounding resistance of test method following figure by shows, along was measuring gr-ing to principle figure check chain function anticcorditch, Check its limited bit role of directional and the reliability; on has electrical joint lock link of equipment, should athe protection components, should can achieved quickly, and accurate, and reliable of protection function; manual the trip sw ovingse are should quickly, the related lights indicates to meet drawings requirements; with artificial simulation of method try moperation the button or switch, corresponding of the following electrical, and contact device of sucking collection and relea ormal;, connected control power, check the Department of voltage whether meet provides, lights following electrical, work whether nsimulation action test: disconnect electrical line of main loop switch outlet at, motor, electrical equipment not by electricloop ance test methods: secondary circuit insulation resistance must be greater than 1M (use 500V megohmmeter to check). 2 controliring is correct, correct polarity, the secondary side are not allowed to open. 5.3.2.2 debugging 12 wiring insulation resistcurrent transformer w that the wiring is correct, the operation is flexible, auxiliary contact is accurate. 11 current and voltage circuits check:83 实验十七 微波传输线匹配理论 步骤二:如图2(a)中所示，当电路匹配时，Q=Q。依下列 公式 小学单位换算公式大全免费下载公式下载行测公式大全下载excel公式下载逻辑回归公式下载 计算出Q ,Q: SLSL RLQQ,,,1 SLRS 步骤三:判别R < R(如图2(a)所示)或R > R (如图2(b)所示)。 SLSL Pout R S X L Vs X SR L RR S L 图 2(b) L型 匹 配 电 路 : Rs > RL : : (1) R < RL S RLX,Q,R,X, SSSLQL (2) R > R: SL RSX,,X,Q,R SLLLQS 步骤四:若R < R，如图2(c),(d)中所示，选择 L-C低通式或C-L高通式电路。SLSPSP根据下列公式计算出电路所需电感及电容值: 图 2(d) Cs-Lp高 通 式 L型 图 2(c) Ls-Cp低 通 式 L型 (a) L-C低通式 : SP ' and current detection needle C' according to line each other apart 20m, insert to in the, andounding very E' makes potential detection needle Pmine grounding system debugging 5.3.3.1 grounding resistance of test method following figure by shows, along was measuring gr-ink of equipment, should according to principle figure check chain function antilock lion function; manual the trip switch, Check its limited bit role of directional and the reliability; on has electrical joint simulation of method try moving the protection components, should can achieved quickly, and accurate, and reliable of protectcial of sucking collection and release are should quickly, the related lights indicates to meet drawings requirements; with artifi lectrical, work whether normal; operation the button or switch, corresponding of the following electrical, and contact devicewing erical equipment not by electric, connected control power, check the Department of voltage whether meet provides, lights folloeter to check). 2 control loop simulation action test: disconnect electrical line of main loop switch outlet at, motor, electegohmming 12 wiring insulation resistance test methods: secondary circuit insulation resistance must be greater than 1M (use 500V mts check: current transformer wiring is correct, correct polarity, the secondary side are not allowed to open. 5.3.2.2 debuggthat the wiring is correct, the operation is flexible, auxiliary contact is accurate. 11 current and voltage circui84 实验十四 匹配理论 X1SL,,C, SP2,f2,f,XCCL (b) C- L高通式: SP 1XLC,,L, SP2f,X2f,,CSC 步骤五:若R > R，如图2(e)( f ) 中所示，选择 C- L低通式或L- C高通SLPSPS式电路。按下列公式计算出电路所需电感及电容值: 图 2(e) Cp- Ls低通式L型 图2(f) Lp - Cs高通式L型 (a) C- L低通式: PS 1XLC,,L,PS 2,f,X2,fCSC (b) L- C高通式 : PS X1SL,,C,PS 2,f2,f,XCCL (B) T型匹配电路(T-type Matching Network)(以R < R为例) SL步骤一:决定工作频率fc、负载Q值、输入阻抗R及输出阻抗R。并求 SL 出R= MIN( R，R). small SL 步骤二:依图2-3(a)中所示及下列公式计算出X、X、X及X。 S1P1P2S2 Pout R SX S1 XS2 Vs XXR P R LR LR S P12 图 3(a) T型 匹 配 电 路 ovingse are should quickly, the related lights indicates to meet drawings requirements; with artificial simulation of method try moperation the button or switch, corresponding of the following electrical, and contact device of sucking collection and relea ormal;, connected control power, check the Department of voltage whether meet provides, lights following electrical, work whether nsimulation action test: disconnect electrical line of main loop switch outlet at, motor, electrical equipment not by electricloop ance test methods: secondary circuit insulation resistance must be greater than 1M (use 500V megohmmeter to check). 2 controliring is correct, correct polarity, the secondary side are not allowed to open. 5.3.2.2 debugging 12 wiring insulation resistcurrent transformer w that the wiring is correct, the operation is flexible, auxiliary contact is accurate. 11 current and voltage circuits check:C' according to line each other apart 20m, insert to in the, andounding very E' makes potential detection needle P' and current detection needle mine grounding system debugging 5.3.3.1 grounding resistance of test method following figure by shows, along was measuring gr-ing to principle figure check chain function anticcorditch, Check its limited bit role of directional and the reliability; on has electrical joint lock link of equipment, should athe protection components, should can achieved quickly, and accurate, and reliable of protection function; manual the trip sw 85 实验十七 微波传输线匹配理论 R2 RRQXQRX,,(，1),,,,,smallS1SP1Q RRQ,,1,X,,X,Q,R 2P2S22LRQL2 步骤三:根据电路选用元件的不同，可有四种形式 。如图 2-3(b)(c)(d)(e) 所示。其中电感及电容值之求法，如下所列: X1L,,C, 2,f2,f,XCC (b) (c) (d) (e) (C)П形匹配电路(П-type Matching Network)(以R