CAD in Communications

The course is a substitute for:

CAD in Communications (X37CAD)

Lecturer:

Tutor:

Supervisor:

Department of Radioelectronics

Synopsis:

Concept of model. Algorithms and numerical methods. Computer-aided design and methods of field analysis in radioengineering. CAD for transmission lines and matching; models of elements, lines and discontinuities. Linear and nonlinear models of active elements. Methods of analysis of linear and nonlinear circuits, tolerance and statistical analysis. Optimization. Strategy of design using CAD by means of basic topical professional systems.

Requirements:

Basic knowledge of circuit theory. To probe further, visit us at Navštivte http://en.elmag.org/doku.php/k317:cad

Visit http://radio.feld.cvut.cz/personal/dobes2/dobes.en.pdf

Syllabus of lectures:

1. Introduction. Waves on transmission lines, SWR. Impedance as a function of line length

2. Scattering parameters for one-, two-, and three-port circuits. Graph of signal flows

3. Smith chart, impedance matching. Narrow band matching circuits

4. Analysis methods appropriate for high frequency circuits and their CAD implementation

5. Optimization, error function, basic local and global methods

6. Rollet stability factor, design of narrow-band transistor amplifier

7. Tolerance analysis. Methodology of RF circuits design using CAD tools

8. Model structure of RF and microwave circuits, standard and Zener diode model

9. Quasisaturation version of Gummel-Poon model of bipolar transistor

10. Semiempirical model of MOSFET (both classical one and BSIM III.x)

11. Realistic model of GAASFET (Parker), models of other microwave transistors

12. Simplified algorithm for solving system of stiff nonlinear differential equations

13. Solving sparse systems of circuit linear equations. Deflation, poles-zeros extraction

14. Fast optimization algorithms using derivatives (generalized least-squares)

Syllabus of tutorials:

1. Introduction. Organization of exercises

2. Scattering parameters of some two-port circuits

3. Impedance adaptation by lumped circuits, SD program

4. Analysis and design of basic transmission lines by HFLINES program

5. Circuit analysis by MIDE / WinMIDE programs

6. Circuit optimization, formulation of objective function, convergence questions

7. Project assignment

8. Introduction to up-to-date version of OrCAD-PSpice, graphical editor of system

9. DC modes of PSpice analyses (OP, DCTR, TF, SENS)

10. AC modes of PSpice analyses (AC, NOISE, DISTO of Spice3)

11. TRAN modes of PSpice analyses (TRAN, FOUR)

12. Accuracy and reliability enhancement of analyses by math control parameters of Spice

13. Autonomous solution of a task using OrCAD-PSpice

14. Credit test

Study Objective:

To make students familiar with modeling, analysis and optimization of radio-frequency circuits.

Study materials:

1. Vladimirescu, A.: The Spice Book. New York: John Wiley & Sons. 1994

2. Massobrio, G., Antognetti, P.: Semiconductor device modeling with SPICE. New York: McGraw-Hill. 1993

3. Zhang, Q.J., Gupta, K.C.: Neural networks for RF and microwave design. Norwood: Artech House. 2000

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Electronics and Communication Technology - structured studies (compulsory course)