基于ADS軟件的傳輸線理論仿真設(shè)計(jì)與分析

基于ADS軟件的傳輸線理論仿真設(shè)計(jì)與分析實(shí)驗(yàn)?zāi)康模?、熟悉ADS軟件的使用；2、利用ADS軟件進(jìn)行基本傳輸線和微帶線的電路設(shè)計(jì)和仿真。實(shí)驗(yàn)原理：對(duì)無(wú)耗均勻傳輸線，線上各點(diǎn)電壓U(z),電流I(z)與終端電壓Ui,終端電流L的關(guān)系為：U(z)二Uicos(Pz)+jIiZosin(0z)I(z)二Iicos(Pz)+j(Ui/Zo)sin(0z)其屮Z。為無(wú)耗傳輸線的特性阻抗；p為相移常數(shù)。定義傳輸線上任意一點(diǎn)z處的輸入電壓和輸入電流之比為該點(diǎn)的輸入阻抗，記作氐,即：Zin(z)二U(z)/I(z)由此可以得：Z_UiCOS(pz)+jIiZoSIN(pz)I1COS(卩z)+j票Sin(Bz)

乙0_7Zi+jZotanEi3(fz)°Zo+jZitanED(fz)其中，Zi為終端負(fù)載阻抗。軟件仿真?終端為匹配負(fù)載情況下的特性:lerm*Term1-Num=1-lerm*Term1-Num=1-Z=50Ohm.TLINTL1Z=50：00hmE=50??F=5GHz?TermTertn2Num二2.2=50Ohm器-S-PARAMETERS????????Param.Start二0GHz....Stop=10.0GHzStep=O.dO1GHz圖（a）終端負(fù)載匹配時(shí)的原理圖freq.GHz《二s'copfreqfreq.GHz《二s'copfreqFjrtZPortZ(1)P0ftZ(2)0.0000Hz50.000/0....50.000f0...1.000MHz50.000/0....50.000f0...2000MHZ50000/050000*03000MHZ50000/050000/04.000MHz50.000!0....50.000f0….5.000MHZ50.000/50.000f0....6000MHZ500001050000/07000MHz50000/050000/08.000MHz50.000!0....50.000f0….9000MHZ50OOD/□50OOO/O..1000MHZ500001050000/011.00MHz50.00050.000/0....12.00MHZ50.000/50.000f0….1300MHZ50OOD/□50OOO/O..1400MHz50000/050000/015.00MHz50.000丿‘0.…50.000/0....1600MHZ50000/050000/0..1700MHZ5000D/□50OOO/O..18.00MHz50.000/0....50.000/0....19.00MHz50.000丿‘0.…50.000/0....2000MHZ50000/050OOO/O..2100MHZ50000/050OOOf0圖（b）終端負(fù)載匹配時(shí)輸入阻抗分布列表和s參數(shù)分布仿真結(jié)果分析:傳輸線上任意點(diǎn)的輸入阻抗為50Q，此時(shí)Zin=Zo,與理論吻合；終端負(fù)載匹配時(shí)反射系數(shù)為-50dB,能量幾乎都傳遞到了負(fù)載，與傳輸線終端匹配理論「（z）二0吻合。（2）負(fù)載短路情況下的特性：

TermTerm1Num=1Z=50OhmTLIN..TL1Z=50.0OhmE=50F=5GHz?TLSCZ=50.0OhmE=0F=5GHzTermTerm1Num=1Z=50OhmTLIN..TL1Z=50.0OhmE=50F=5GHz?TLSCZ=50.0OhmE=0F=5GHz十?TL2S_ParamSP1Start=OGHzStop=10.0GHz-Step=0.1GHz....圖(d)終端負(fù)載短路時(shí)的原理圖圖(b)終端負(fù)載短路時(shí)S參數(shù)分布和smith圓圖freqPortZ0.0000HZ5Q.D0a/0.000100.0MHz50.000/0.000200.0MHz50.000/0.000300.0MHZ50.000/0.000400.0MFt5Q.00070.000500.0MHZ5Q.D0a/0.000600.0MHZ50.000/0.000700.0MHz50.000/0.000800.0MHZ50.000/0.000900.0MFt5Q.00070.0001.000GHZ5Q.D0a/0.0001.100GHz50.000/0.0001.200GHz50.000/0.0001.300GHZ50.000/0.0001.400GHz50.000/0.0001.500GHZ5Q.D0a/0.0001.600GHZ50.000/0.0001.7D0GHz50.000/0.0001.800GHZ50.000/0.0001.900GHz50.000/0.0002.000GHZ5Q.D0a/0.0002.100GHZ50.000/0.0002.200GHz50.000/0.0002.300GHZ50.000/0.0002.400GHz50.000/0.0002.500GHZ5Q.D0a/0.0002.600GHz5Q.00070.0002.7D0GHz50.000/0.0002.800GHZ50.000/0.0002.900GHz50.000/0.000圖(c)終端負(fù)載短路時(shí)的輸入阻抗分布列表仿真結(jié)果分析：終端負(fù)載短路情況下，「二-1,反射系數(shù)為OdB,

傳輸線上任意一點(diǎn)Z處的反射系數(shù)卩z,如圖(b)smith

圓圖，與理論相吻合；傳輸線上任意一點(diǎn)Z處的輸入阻抗為Zin=jZotanpZo終端負(fù)載開(kāi)路情況下的特性:S_ParamSP1Start=OGHzStop=10：0GHzStep=0.1.GHzS_ParamSP1Start=OGHzStop=10：0GHzStep=0.1.GHz圖(G終端負(fù)載開(kāi)路時(shí)的原理圖圖(b)終端負(fù)載開(kāi)路時(shí)的S參數(shù)分布和smith圓圖freqS(1,1)0.0000Hz1.000/0.000100.0MHZ1.000/-2000200.0MHz1.000/-4.000300.0MHZ1.000/-6.00Q400.0MHz1.000/-8.00050Q.0MHZ1.000/-10.000600.0MHZ1.00DM2.000700.0MHz1.000M4.000800.0MHZ1.000/-16.000900.0MHz1.000/-18.0Q01.000GHZ1.000/<20.0001.100GHZ1.000/-22.0Q01.200GHz1.000/-24.0001.300GHZ1.000J26.0Q01.400GHz1.000人28.0001.500GHZ1.000/-30.0001.600GHz1.000/-32.0001.700GHZ1.000/<34.0Q01.800GHz1.000/-36.0001.900GHz1.000/-38.0002.000GHZ1.000/-40.0Q02.100GHz1.000/-42.0002.200GHZ1.000/-44.0002.300GHz1.000/-46.0002.400GHz1.000/-48.0002.500GHz1.000/-50.0002.600GHz1.000/-52.0002.700GHZ1.000/-54.0Q02.800GHz1.000/-56.0002.900GHZ1.000/^58.000圖(c)終端負(fù)載開(kāi)路時(shí)的輸入阻抗分布列表仿真結(jié)果分析：終端負(fù)載開(kāi)路情況下，此時(shí)只能存儲(chǔ)能量而不能傳輸能量，反射系數(shù)為OdB,r=-1,發(fā)生了全反射，如smith圓圖，與理論吻合；輸入阻抗值如圖(c)所示，與理論公式Zin二-jZCOtpZ相吻合O終端負(fù)載為純電抗時(shí)的特性：-Term??Term1Num=1Z=50OhmS1P_Eqn?S1R彳..S[1J]=n2[1]=1*20丄S-PARAMETER'S?-Term??Term1Num=1Z=50OhmS1P_Eqn?S1R彳..S[1J]=n2[1]=1*20丄S-PARAMETER'S?SiParam-SP1.?Start=OGHzStop=10.0GHzStep=0.1GHz圖（a）終端負(fù)載為純電抗時(shí)的原理圖((三)smpfreq(00000Hzto10.00GHz)TLIN????TL1-??Z二50.0Ohm.E二40...F=4GHz????圖（b）終端負(fù)載為純電抗時(shí)的S參數(shù)分布和smith圓圖freqS(")0.0000Hz1.000/-136.397100.0MHz1.000/-138.397200.0MHz1.000/-140.397300.0MHz1.000/-142.397400.0MHz1.000/-144.397500.0MHz1.000/-146.397600.0MHz1.000/-148.397700.0MHz1.000/-150.397800.0MHZ1.000/-152.397900.0MHz1.000/-154.3971.000GHZ1.000/-156.3971.100GHz1.000/-158.3971.200GHZ1.000/-160.3971.300GHZ1.000/-162.3971.400GHZ1.000/-164.3971.500GHZ1.000/-166.3971.600GHZ1.000/-168.3971.700GHZ1.000/-170.3971.800GHZ1.000/-172.3971.900GHZ1.000/-174.3972.000GHZ1.000/-176.3972.100GHZ1.000/-178.3972.200GHZ1.000/179.6032.300GHZ1.000/177.6032.400GHZ1.000/175.6032.500GHZ1.000/173.6032.600GHZ1.000/171.6032.700GHZ1.000/169.6032.800GHZ1.000/167.6032.900GHZ1.000/165.603圖(c)終端負(fù)載為純電抗時(shí)的輸入阻抗分布列表仿真結(jié)果分析：終端負(fù)載為純電抗情況下，同樣，負(fù)載不消耗能量，r=—1,發(fā)生了全反射，如圖(b)與理論相吻合；此時(shí)的輸入阻抗值如圖(c)所示，滿足理論公式Z-jXo終端負(fù)載為復(fù)阻抗時(shí)的特性：Term1erm1Num=1Z=50Ohm-TLINTerm1erm1Num=1Z=50Ohm-TLIN-??-TL1-??.Z二50-0OhmE=50F二5GHzS-PARAMETERS..Term????7erm2Num=2Z=50+jMOOOhmS_ParamSP1Start二0GHzStop二100GHz?Step=0.1GHz????終端負(fù)載為復(fù)阻抗時(shí)的原理圖a終端負(fù)載為復(fù)阻抗時(shí)的原理圖a56froq,GHz((二)smp圖(b)終端為復(fù)阻抗時(shí)的S參數(shù)分布和smith圓圖freq0.0000Hz0.707/45.000100.0MHz0.707/43.000200.0MHz0.707/41.000300.0MHZ0.707/39.000400.0MHz0.707/37.000500.0MHZ0.707/35.000600.0MHz0.707/33.000700.0MHz0.707/31.000800.0MHz0.707/29.000900.0MHz0.707/27.0001.000GHz0.707/25.0001.100GHz0.707/23.0001.200GHz0.707/21.0001.300GHz0.707/19.0001.400GHz0.707/17.0001.500GHz0.707/15.0001.600GHz0.707/13.0001.700GHz0.707/11.0001.800GHz0.707/9.0001.900GHz0.707/7.0002_000GHz0.707/5.0002.100GHz0.707/3.0002.200GHz0.707/1.0002.300GHz0.707/-1.0002.400GHz0.707/-3.0002.500GHz0.707/-5.0002.600GHz0.707/-7.0002.700GHz0.707/-9.0002.800GHz0.707/-11.0002_900GHz0.707/-13.000圖（c）終端負(fù)載為復(fù)阻抗時(shí)的輸入阻抗分布列表仿真結(jié)果分析：當(dāng)終端負(fù)載為復(fù)阻抗時(shí)，信號(hào)源入射的電磁波功率一部分被終端負(fù)載吸收，另一部分被反射，此時(shí)反射系數(shù)rxi,r^lrje^,與圖（b）相吻合