By Professor Syed Idris Syed HassanSch of Elect. Electron .ppt
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1、By Professor Syed Idris Syed Hassan Sch of Elect. & Electron Eng Engineering Campus USM Nibong Tebal 14300 SPS Penang,Microwave Circuit Design,Introduction,10 weeks lecture + 4 weeks ADS simulation Assessments :8 tests + 2 ADS assignments + 1 final examination Class : 9.00- 10.30 lecture10.30-11.00
2、rest (tea break)11.00-12.30 lecture12.30- 1.00 test,Dates,06/04/02 Morning 20/04/02 Morning 27/04/02 Morning 04/05/02 Morning 11/05/02 Morning 18/05/02 Morning 25/05/02 Morning,08/06/02 Morning 15/06/02 Morning 22/06/02 Morning 29/06/02 morning 06/07/02 Morning 20/07/02 Morning 27/07/02 Morning,Syll
3、abus,Transmission lines Network parameters Matching techniques Power dividers and combiners Diode circuits Microwave amplifiers Oscillators Filters design Applications Miscellaneous,References,David M Pozar ,Microwave Engineering- 2nd Ed., John Wiley , 1998 E.H.Fooks & R.A.Zakarevicius, Microwave En
4、gineering using microstrip circuits, Prentice Hall,1989. G. D. Vendelin, A.M.Pavio &U.L.Rohde, Microwave circuit design-using linear and Nonlinear Techniques, John Wiley, 1990. W.H.Hayward, Introduction to Radio Frequency Design, Prentice Hall, 1982.,Transmission Line,Equivalent Circuit,R,R,L,L,C,G,
5、Lossy line,Lossless line,Analysis,From Kirchoff Voltage Law,Kirchoff current law,(a),(b),Analysis,Lets V=Voejwt , I = Ioejwt,Therefore,then,a,b,Differentiate with respect to z,Analysis,The solution of V and I can be written in the form of,where,Let say at z=0 , V=VL , I=IL and Z=ZL,Therefore,and,e,f
6、,c,d,and,Analysis,Solve simultaneous equations ( e ) and (f ),Inserting in equations ( c) and (d) we have,Analysis,But,and,Then, we have,and,*,*,Analysis,Or further reduce,or,For lossless transmission line , g= jb since a=0,Analysis,Standing Wave Ratio (SWR),node,antinode,Ae-gz,Begz,Reflection coeff
7、icient,Voltage and current in term of reflection coefficient,or,Analysis,For loss-less transmission line,g = jb,By substituting in * and * ,voltage and current amplitude are,Voltage at maximum and minimum points are,and,Therefore,For purely resistive load,g,h,Analysis,Other related equations,From eq
8、uations (g) and (h), we can find the max and min points,Maximum,Minimum,Important Transmission line equations,Zo,ZL,Zin,Various forms of Transmission Lines,Parallel wire cable,Where a = radius of conductor d = separation between conductors,Coaxial cable,Where a = radius of inner conductorb = radius
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