Dr Chaldavi

  RESUME

  Name: Ahmad Cheldavi

  Date of Birth: Oct. 27, 1966

  Marital Status: Maried

  Positions:

  1991-1998: Instructur in Iran University of Science and Technology (IUST)

  Feb. 1999-Dec. 1999: Visiting Scholar in the University of Waterloo,Waterloo, ON, Canada

  2000- 2004: Assistant Professor at the College. of Electrical Engineering of IUST

  2004- present: Associate Professor at the College. of Electrical Engineering of IUST.

  Industrial Activities

  1998- present: Consultant Engineer and Principal Investigator in several government sponsored projects in the areas of microwave and wireless communication systems for Several Iranian Industries .

  Education:

  B. Sc.: 1988-1992, IUST, Tehran, Iran

  M. Sc.: 1992-1994, University of Tehran, Tehran, Iran

  Ph. D.: 1994-2000, University of Tehran, Tehran, Iran

  Subject of B. Sc. Thesis: Analysis of Transients in Digital and Analog Transmission Lines

  Subject of M. Sc. Thesis: Time-Domain Analysis of Transmission lines

  Subject of Ph. D. Thesis: Simulation, Modeling and EMI Analysis of Nonuniform Coupled Transmission Lines: Application in Packaged VLSI Interconnects

  Research

  I) Books Published:

  1. Signals and Systems, Volume 1 and 2 (in Persian)

  Published by IUST Publishing Centre in 1993 and 2nd Edition in 1997

  2. Electromagnetics (in Persian)

  Published by IUST Publishing Centre in 1993 and 2nd Edition in 1997

  II) Conference Papers

  1. A. Cheldavi, H. Oraizi and M. Kamarei,” Time-domain analysis of transmission lines,” Proc. 25th EuMC, pp. 794-797, Sep. 4-7, 1995, Bologna, Italy.

  2. A. Cheldavi and M. Kamarei, “Time-domain analysis of broadband matching for maximum power transmission with TEM steplines,” Proc. APMC’96, pp. 1378-1383, Dec. 17-20, 1996, New Delhi, India.

  3. A.cheldavi,” Time-domain simulation of TEM steplines,” Proc. APMC’96, pp.1384-1387, Dec. 17-20, 1996, New Delhi, India.

  4. A. Cheldavi, “An exact solution for wave equation in lossless TEM transmission lines with time-dependent media and nonlinear time-dependent load (using time-domain analysis),” Proc. ISAP’96.pp. 445-448, Sep. 24-27, 1996, Chiba, Japan.

  5. A. Cheldavi, “Time-domain analysis of TEM transmission lines with random media,” Proc. ISEF’97, Sep. 25-27, 1997,Gdansk, Poland.

  6. A. Cheldavi, “Propagation of transients in tapered transmission lines with dispersive dielectric media and time-dependent load using FDTD method,” Proc. IEEE AP-s 1997, pp. 392-395, July 13-18, 1997, Montreal, Canada.

  7. A. Cheldavi and M. Kamarei, “Practical optimum design for a single-layer electromagnetic wave absorber at C and X-band using genetic algorithm,” Proc. IEEE AP-s 1997, pp. 1708-1711, July 13-18, 1997, Montreal, Canada.

  8. A. Cheldavi and M. Kamarei, “Time-domain (transient) analysis of capacitive Jaumann absorbers,” Proc. IEEE MTT-s 1997, June 8-13, 1997, Denever, Colorado, USA.

  9. A. Cheldavi, “A new method for impedance mesearment of the circuit analog sheets,” Proc. IWTS’97, May 14-16, 1997, Shah Alam, Malaysia.

  10. A. Cheldavi, “Exact analysis of transmission lines with time-dependent boundary conditions,” Proc. IWTS’98, May 11-15, 1998, Malaysia.

  11. A. Cheldavi, “Optimum design of radar pulses for stealth targets,” Proc. IEEE AP-s 1998, June 21-26, 1998, Atlanta, USA.

  12. A. Cheldavi, “Measurment of complex permittivity and permeability of dielectric materials using a coaxial transmission line with sensitivity and error analysis,” Proc. PIERS’98, July 13-17, 1998, Nantes, France.

  13. A. Cheldavi, M. Kamarei and S. Safavi Naeini, “Exact time-domain analysis of coupled transmission lines with general loads (application to crosstalk in high speed circuits),” Proc. ANTEM’98, Torento, Canada.

  14. A. Cheldavi, “Exact analysis of externally excited coupled linear tapered nonuniform transmission lines,” Proc. EMC’99, May 17-21, 1999, Tokyo, Japan.

  15. A. Cheldavi, “Exact analysis of coupled nonuniform transmission lines with power-law characteristic impedance functions,” Proc. EMC’99, May 17-21, 1999, Tokyo, Japan.

  16. A. Cheldavi, S. Safavi Naeini and M. Kamarei, “Time-domain analysis of nonuniform coupled planar lines in VLSI circuits,” Proc. PACRIM’99, Aug. 22-24, 1999, Victoria, BC, Canada.

  17. A. Cheldavi, A. Foroozesh, and F. Hodjat, “Analysis of frequency selective surface using entire domain method,” Proc. of IWTS’99, Shah Alam, Malysia, May 1999.

  18. A. Cheldavi, A. Foroozesh, “Improved measured equation of invariance,” Proc. of IWTS’99, Shah Alam, Malysia, May 1999.

  19. A. Cheldavi and G. Rezai Rad, “ Discerete time-domain analysis of nonuniform lossless coupled transmission lines,” Proc. of ISAPE 2000, Aug. 16-18, 2000, Beijing, China.

  20. A. Cheldavi and G. Rezai Rad, “ The response of rotative two wire transmission line excited by external electromagnetic field,” Proc. of ISAPE 2000, Aug. 16-18, 2000, Beijing, China.

  21. A. Cheldavi and G. Rezai Rad, “ Time-domain analysis of coupled Hermite transmission lines,” Proc. of ISAPE 2000, Aug. 16-18, 2000, Beijing, China.

  22. A. Cheldavi, M. Kamarei, and S. Safavi-Naeini, “Transient analysis of coupled transmission lines with power law characteristic impedance,” presented at 4th European Sym. on EMC, Brugge, Belgium, Sep. 11-15, 2000.

  23. A Cheldavi, S. Safavi-naeini, and M. Kamarei, “Nonuniform coupled VLSI interconnect characterization using genetic algorithm,” presented at International Conference on Microelectronic ICM’2000, Tehran, Iran, Oct. 31-Nov. 2, 2000.

  24. Alireza Foroozesh, Ahmad Cheldavi, and Farokh Hodjat, “Design of Jaumann absorbers using adaptive genetic algorithm,” Proc. of ISAP 2000, Fukuoka, Japan, Aug. 21-25, 2000.

  25. A. Cheldavi. “Analysis of Radiation from Nonuniform Transmission Lines,” Proc. of 2001 IEEE EMC Symposium, Montreal, Canada, Aug. 13-17, 2001.

  26. A. Cheldavi. “Field Coupling to Nonuniform Microstrip Transmission Lines,” Proc. of 2001 IEEE EMC Symposium, Montreal, Canada, Aug. 13-17, 2001.

  27. Ahmad Cheldavi, D. Ansari, and Mohamad Khalaj Amir Hoseini,” Circulant Symmetric Multi Conductor Microstrip Line Exposed to EM Field”, Proc. IASTED Int. Conf. CSN, Sep. 2004, pp. 313-316, Marbella, Spain.

  28. Mohamad Khalaj Amir Hoseini and Ahmad Cheldavi,” Optimum and Wideband Design of G-S-G Interconnect,”, Proc. IASTED Int. Conf. CSN, Sep. 2004, pp. 310-312, Marbella, Spain.

  29. Mohamad Khalaj Amir Hoseini and Ahmad Cheldavi, " Wideband and Efficient Interconnect Using Multi-Segmented Grounded and Opened Lines", Proc. Of 34-th European Microwave Conference , pp. 657-660, Amesterdam, 2004.

  30. R. Pazoki, and A. Cheldavi, “ Self-Metron MEI Technique "," accepted in 2005 IEEE AP-S Int. Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, Washington, DC, USA, July 3-8, 2005.

  31. Ahmad Cheldavi, Mohamad Khalaj Amir Hoseini, Shima Abbasi” Coplanar Transmission Line Exposed to Electromagnetic Field”, Proc. 2005 IEEE International Symposium on Microwave, Antenna, Propagatio and EMC Technologies for Wireless Communications, Sep. 2005, pp. 1092-1095, Beijing, China.

  32. Mohamad Khalaj Amir Hoseini and Ahmad Cheldavi,” Two-Dimensional Time Domain Analysis of Microstrip Lines Using RCMS Model”, Proc. 2005 IEEE International Symposium on Microwave, Antenna, Propagatio and EMC Technologies for Wireless Communications, Sep. 2005, pp. 1252-1254, Beijing, China.

  33. Ahmad Cheldavi, and Maryam Hashemi Nasab,” Coupling Model for the Two Orthogonal Microstrip Lines in Two Layer PCB Board (Quasi-TEM Approach)”, Proc. 2005 IEEE International Symposium on Microwave, Antenna, Propagatio and EMC Technologies for Wireless Communications, Sep. 2005, pp. 1096-1099, Beijing, China.

  34. Payam Nayeri, and Ahmad Cheldavi “ A Novel Method For Analysis Of V-Transmission Lines” Proc. Of ANTEM/URSI 2006, Canada.

  35. Payam Nayeri, and Ahmad Cheldavi “V Transmission lines Frequency Operation Band” Proc. Of ACES, Verona, Italy, 2007.

  36. Hamid Khodabakhshi, and Ahmad Cheldavi, “Method of Forces: A Novel Approach for Finding Current Distributions on Single and Coupled Microstrip Lines” Proc. Of EMC Zurich, Singapore, 2008.

  37. Hamid Khodabakhshi, Ahmad Cheldavi, “Analytic Solution for the Problem of Excited Coupled Exponential Transmission Lines” Proc. Of ISAP'2006, Japan.

  38. Ahmad Cheldavi, “EM Field Coupling to Coplanar Transmission Lines” Proc. Of Asia-Pacific Microwave Conf.(APMC2006), India.

  39. Ahmad Cheldavi, “Accurate Analysis OF Transverse Slit In Microstrip in microstrip transmission lines” Proc. Of ICTTA, 2007, Syria.

  40. Hamid Khodabakhshi, Ahmad Cheldavi, “ EM Field Coupling to Microstrip Lines with Nonuniformity in Their Width Using Rigorously Coupled Multiconductor Transmission Lines” Proc. Of PIERS 2007, Czech.

  41. Hamid Khodabakhshi, Ahmad Cheldavi, “ Quasi-TEM Approach of Two Layer Circular Symmetric Coupled Microstrip Line ” Proc. Of EuMA 2008, Netherand.

  42. Mohammad Kazerooni, Ahmad Cheldavi, Mahmood Kamarei “ A New Bandstop Cascaded Defected Microstrip Structure (CDMS) Filter with 10GHz Symmetrical Bandwidth

  ” PIERS 2009, Moscow.

  43. Mohammad Kazerooni, Ahmad Cheldavi, Mahmood Kamarei “A New Bandpass Defected Microstrip Structure (DMS) Filter for Planar Circuits” PIERS 2009, Moscow.

  44. Mohammad Kazerooni, , Novid Pour Ramazan Ganji, Ahmad Cheldavi, Mahmood Kamarei “A New Bandpass Defected Microstrip Structure (DMS)” PIERS 2009, Moscow.

  III) Journal Papers

  1. A. Cheldavi, “Optimum design of N-sheet capacitive Jaumann absorbers,”

  IEICE Trans. Fundamentals, vol. E82-A, No. 4, pp. 704-706, April. 1999.

  2. A. Cheldavi, M. Kamarei and S. safavi Naeini, “First order approximation of the exact solution of arbitrary nonuniform transmission lines: application in high speed integrated circuits,” IEICE Trans. Electron., vol. E82-c, no. 12, pp. 1-7, Dec. 1999.

  3. A. cheldavi, H. oraizi and M. kamarei, “Time-domain analysis of transmission lines,”

  Int. Jornal of Engineering Science, vol.9, no. 4, pp. 1-23, 1998, .

  4. A. cheldavi, M. kamarei and S. Safavi Naeini, “Analysis of coupled transmission lines with power law characteristic impedance,” IEEE Trans. Electromagn. Compat., vol. 42, No. 3, pp. 308-312, Aug. 2000.

  5. A. Cheldavi, ““Fraequency domain analysis of coupled transmission lines with exponential power law characteristic impedance,” IEEE Trans. on Microwave Theory Tech., Vol. 49, No. 1, pp. 197-199, Jan. 2001.

  6. A. Cheldavi, G. Rezai-rad, “Modeling of nonuniform coupled transmission lines Interconnect using genetic algorithms,” IEICE Trans. Fondumentals, Electronics, Communications and computer Science, Vol.E83-A, No. 10, pp. 2023-2034, Oct. 2000.

  7. A. Cheldavi and G. Rezaei-Rad, “ Analysis of coupled transmission lines with linear tapered characteristic impedance,” Int. Jornal of Engineering Science, Vol. 13, No. 1, 2002, pp. 63-73.

  8. A. Cheldavi and G. Rezaei-Rad, “ An efficient discrete time-domain method for simulation and analysis of arbitrary nonuniform transmission lines,” Int. Jornal of Engineering Science, 2002.

  9. A. Cheldavi and G. Rezaei-Rad, “Radiation from Exponential Transmission Lines,“ Int. Jornal of Communication Engineering, 2002.

  10. Ahmad Cheldavi, and Mohamad Khalaj Amir Hoseini, “ Time Domain Analysis of Circulant Symmetric Transmission Lines” Int. Jourrnal of Electromagnetic Waves and Application, Vol. 16, No. 7, pp. 977-994, 2002.

  11. Ahmad Cheldavi, “Radiated Emission from Transmission Lines: Exact Time Domain Analysis” Int. Journal of Eng. Science, 2003.

  12. Ahmad Cheldavi,” Radiation from coupled multiconductor transmission lines” IEE Proc.-Gener. Transm. Distrib., Vol. 150, No. 1, January 2003, pp. 15-22.

  13. Ahmad Cheldavi, and Mohamad Khalaj Amir Hoseini, “ Nonuniform Circulant Symmetric Transmission Lines” Int. Jourrnal of Electromagnetic Waves and Application, Vol. 17, No.12, pp. 1703-1712, 2003.

  14. Ahmad Cheldavi,” Radiation from Multiconductor Transmission Lines: Exact Time-Domain Analysis, Taylor and Francis Pub., Electromagnetics, vol. 23, No. 1, January 2003,pp. 55-70.

  15.Ahmad Cheldavi, “Exact Analysis of Externally Excited Coupled Transmission Lines with Linear Tapered Characteristic impedance,” Int. Journal of Eng. Science, vol.13, no. 4, winter 2002, pp-113-121.

  16. Ahmad Cheldavi,” Analysis of Coupled Hermite Transmission Lines,” IEE Proc.-Microwave, Antennas and Propagation, Vol.150, No.4, pp.279-284, Aug. 2003.

  17.Ahmad Cheldavi,”Field Coupling to Nonuniform Coupled Microstrip Transmission Lines." International Journal of RF and Microwave Computer-Aided Engineering Published by John Wiley & Sons, Inc, 2003.

  18. Ahmad Cheldavi and Mohamad Khalaj Amir Hoseini, “ Nonuniform circulant symmetric microstrip transmission lines ,” IEE Proc.-Microwave, Antennas and Propagation, Nov. 2003 .

  19. A. Cheldavi," Spice Compatible Model for Multiconductor Transmission Lines Excited by External EM Field," Int. Journal Of Engineering. 2002.

  20. A. Cheldavi, M. M. danaei,"Capacitive Flux Comperession Generator," Int. Journal Of Engineering. 2004.

 
21. Ahmad Cheldavi, " Exact Analysis of Externally Excited Coupled Transmission Lines with Linear Tapered Characteristic Impedance" Int. Jornal of Engineering Science, Vol. 13, No. 4, 2002, pp. 113-121.

  22. M. Khalaj-Amirhosseini and A. Cheldavi, "Efficient Interconnect Design Using Grounded-Lines", J. of Electromagn. Waves and Appl., Vol. 17, No.9, pp.1289-1300, 2003.

  23. M. Khalaj-Amirhosseini and A. Cheldavi, "The Use of Grounded Lines in Nonuniform Interconnect," J. of Electromagn. Waves and Appl., Vol. 18, No.5, pp.637-647, 2004.

  24. A. Cheldavi , D. Ansari and M. Khalaj-Amirhosseini "Electromagnetic Coupling to Circulant Symmetric Multi-Conductor Microstrip Line” Chapter 10 of Progress in Electromagnetic Research PIER 49, pp. 189-201, 2004.

  25. M. Khalaj-Amirhosseini and A. Cheldavi, "Optimum Design of Microstrip RF Interconnects" J. of Electromagn. Waves and Appl., Vol. 18, No.12, pp.1707-1715, 2004.

  26. M. Khalaj-Amirhosseini and A. Cheldavi, " A New Two-Dimensional Analysis of Microstrip Lines Using Rigorously Coupled Multi-Conductor Strips Model" J. of Electromagn. Waves and Appl., Vol. 18, No.6, pp.809-825, 2004.

  27. M. Khalaj-Amirhosseini and A. Cheldavi, "Analysis of Circular Symmetric Coupled Strip and Microstrip Transmission Lines” Iranian Journal of Science and Technology, Transaction B, Vol.28, No. B3, pp. 365-372, 2004.

  28. A. Cheldavi, and D. Ansari, “ Efficient Frequency-Domain Modelling and Simulation of Nonuniform Coupled Transmission Lines:Application in Transient Analysis of VLSI Circuit”, Can. J. Elect. Comput. Eng., Vol. 29, No. 3, July 2004.

  29. M. Khalaj-Amirhosseini , D. Ansari, and A. Cheldavi,” Field Coupling to Circulant Symmetric Microstrip TL”, IEEE Trans. EMC, Vol. 47, No. 2, pp. 263-273, May 2005.

  30. M. Khalaj-Amirhosseini and A. Cheldavi, “Matched Interconnect Design Using Groun-Surronded Microstrip Line”, IEE Proc.-Circuits Devices Syst., Vol. 152, No. 1, Feb. 2005.

  31. G. Rezai Rad, A. Cheldavi” Discrete time domain analysis of nonuniform lossless coupled transmission lines" to be published in Int. Journal of Circuits and Systems.

  32. R. Pazoki, and A. Cheldavi, “A New Technique to Find the MEI Coefficients in the Time Domain:Self Metron Techniques” Progress in Electromagnetic Research, PIER 56, pp. 53-66, 2005.

  33. M. Hashemi Nasab, and A. Cheldavi, “A simple model for two orthogonal microstrip interconnects in different layers” To be published in J. of Electromagn. Waves and Appl., 2005.

  34. M. Khalaj-Amirhosseini and A. Cheldavi, “Wideband and Efficient Microstrip Interconnects Using Multi-Segmented Ground and Open Traces”,

  Progress in Electromagnetic Research, PIER 55, pp. 33-46, 2005

  35. A. Cheldavi “Comparison of Exact Analysis and Steplines Approximation for Externally Excited Exponential Transmission Line”, International Journal of Engineering, Vol. 18, No. 1, Feb. 2005, pp. 17-25.

  36. Emad Al-Naser, Ahmad Cheldavi,” The effect of external EM waves on a confocal elliptical multiconductor transmission line structure ”, IET Microwaves, Antennas & Propagation, 2008.

  37. Hamid Khodabakhshi, Ahmad Cheldavi, “ EM Field Coupling to Non Uniform Microstrip Lines Using Coupled Multi-Conductor Strips Model ” Progress In Electromagnetic Research, PIER B, Vol 17, 309-326, 2009.

Honors 

  International Conferences Attended

  1995: Europian Microwave Conference, Bologna, Italy.

  1996: International Symposium on Antennas and Propagation, Chiba, Japan.

  1996: Asia-Pacific Microwave Conference, New Delhi, India.

  1997: IEEE Internationl Symposium on Antennas and Propagation (AP-s), Montreal, Canada.

  1999: XXVI th General Assembly of the International ::::::::union:::::::: of Radio Science, Torento, Canada.

  2000: Fourth Internationl Symposium on Electromagnetic Compatibility (EMC EUROPE 2000), Brugge, Belgium.

  2001: IEEE Internationl Symposium on Electromagnetic, Montreal, Canada.

  2004: IASTED International Conference on CSN, Marbella, Spain.

  Courses :

  Graduate Courses

  Undergraduate Courses (Last 9 years):

  Interests

  1. EMC and EMI in VLSI circuits and interconnects.

  2. Interconnect Characterization , Simulation and Analysis.

  3. Time-Domain Analysis of Transmission Lines.

  4. EM Absorbers.

  5. Application of Genetic Algorithms in Electromagnetics.

  6. Wireless Communication Systems