Amir Ahmad Shishegar (Ph.D.)
Professor of Electrical Engineering

 

Sharif University of Technology

Office:   Room 210W, Dept. of Electrical Eng.
             Voice: (+98-21) 6616-4371
             Fax: (+98-21) 6602-3261
Email:  

URL:     http://ee.sharif.edu/~shishegar/
Mailing Address:
             Sharif University of Technology
             Department of Electrical Engineering
             Azadi ave., P.O. Box: 11155-4363
             Tehran, IRAN.

 

> Research Interests

Artificial intelligence and learning in electromagnetics

Bio-electromagnetics

Analytical and computational electromagnetics

EM-wave propagations

> Current Researches

AI and learning applications in electromagnetic problems

Microwave imaging

Bio-EM (Cancer detection and treatment)

Site specific propagation modeling (indoor and outdoor)

Greenís function analysis of finite dielectric structures by CGF-CI technique

Millimeter wave propagation

> Courses

 

Current term:

Advanced Electromagnetic Theory (Fall 2023)

Engineering Math (Fall 2023)

Previous term:

Computational Electromagnetics (Winter 2023)

Guided-wave Optics (Winter 2023) 

For courses' material please see: cw.sharif.edu

 

> Publications

 

 

[1]       SeyedehMounes Eslami and A. A. Shishegar, "Effect of Physical Characteristics on Artificial Neural Network Error Reduction for Indoor Propagation Modeling," in 31st International Conference on Electrical Engineering-ICEE, May, 9-11, 2023 2023.

[2]       S. M. Hosseini and A. A. Shishegar, "Mapping MRI Intensity to the Dielectric Properties of Body Tissues Using Microwave Imaging," Ieee T Antenn Propag, vol. 71, no. 8, pp. 6744-6752, 2023, doi: 10.1109/TAP.2023.3281071.

[3]       L. Ahmadi and A. A. Shishegar, "A Semi-Explicit Solution of Scattering From Dielectric Bodies Using the Method of Moments," Ieee T Antenn Propag, vol. 71, no. 8, pp. 6806-6813, 2023, doi: 10.1109/TAP.2023.3284158.

[4]       S. Sheybani and A. A. Shishegar, "The effect of rough surface diffused scattered field on shadow region in 150GHz for future 6G communication systems," in 2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT), 13-15 Dec. 2022 2022, pp. 1-4, doi: 10.1109/MMWaTT58022.2022.10172109.

[5]       M. A. Khosrovani-Moghaddam and A. A. Shishegar, "Second-Order Mode Analysis of Spoof Surface Plasmon Waveguide," in 2022 30th International Conference on Electrical Engineering (ICEE), 17-19 May 2022 2022, pp. 161-165, doi: 10.1109/ICEE55646.2022.9827036.

[6]       S. M. Hosseini and A. A. Shishegar, "On the Correction of the Boundary Deformation Errors in Microwave Imaging With Spatial Priors," in 2022 30th International Conference on Electrical Engineering (ICEE), 17-19 May 2022 2022, pp. 292-294, doi: 10.1109/ICEE55646.2022.9827317.

[7]       L. Ahmadi and A. A. Shishegar, "Noniterative Solution of Inverse Scattering Problems Using A Priori Information," in 2022 30th International Conference on Electrical Engineering (ICEE), 17-19 May 2022 2022, pp. 180-184, doi: 10.1109/ICEE55646.2022.9827250.

[8]       L. Ahmadi and A. A. Shishegar, "Embedding a priori information in inverse scattering problems using deep learning," in 2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI), 4-10 Dec. 2021 2021, pp. 2006-2007, doi: 10.1109/APS/URSI47566.2021.9704462.

[9]       M. A. Khosrovani Moghaddam and A. A. Shishegar, "Spoof Surface Plasmon Analysis Based on Marcatiliís Method," Journal of the Optical Society of America B, 2020.

[10]     L. Ahmadi, S. M. Hosseini, and A. A. Shishegar, "Solving Inverse Electromagnetic Problems Using Deep Learning," in 2020 28th Iranian Conference on Electrical Engineering (ICEE), 2020.

[11]     Fatemeh Adibzadeh, Kemal Sumser, Sergio Curto, Desmond T. B. Yeo, Amir A. Shishegar, and M. M. Paulides, "Systematic review of pre-clinical and clinical devices for magnetic resonance-guided radiofrequency hyperthermia," International Journal of Hyperthermia, vol. 37, no. 1, pp. 15-27, 2020. [Online]. Available: https://doi.org/10.1080/02656736.2019.1705404.

[12]     M. H. Sadrearhami and A. A. Shishegar, "Time Domain Greenís Function of a 2D Rectangular Room," Ieee T Antenn Propag, 2018.

[13]     M. Boozari, V. Mohtashami, and A. A. Shishegar, "Computational Efficiency Improvement of Frequency Post-Processing In Ultra-Wideband Propagation Modeling Using Polynomial Interpolation Functions," Journal of Applied Electromagnetics, vol. 3, no. 4, pp. 29-37, 2016 2017.

[14]     R. Aminzadeh, M. Saviz, and A. A. Shishegar, "Comments on Wideband Skin-Equivalent Phantom for V- and W-Band," IEEE Antennas and Wireless Propagation Letters, vol. PP, no. 99, pp. 1-1, 2017, doi: 10.1109/LAWP.2017.2675618.

[15]      A. Torabi and A. A. Shishegar, "An efficient approach for reflectivity and coupling computation in an abruptly ended planar layered waveguide using modified formulation of CGF-RFFM," in 2016 German Microwave Conference (GeMiC), 14-16 March 2016 2016, pp. 128-131, doi: 10.1109/GEMIC.2016.7461573.

[16]      A. Torabi and A. A. Shishegar, "An Efficient Optimization Problem for Modal Reflectivity at Optical Waveguide End-Facet Based on the Formulation of Characteristic Greenís Function Technique," in Photoptics 2015: Revised Selected Papers, P. Ribeiro and M. Raposo Eds. Cham: Springer International Publishing, 2016, pp. 105-117.

[17]      M. H. Sadrearhami and A. A. Shishegar, "Closed-Form Green's Function of a 2-D Rectangular Room," Ieee T Antenn Propag, vol. 64, no. 12, pp. 5291-5298, 2016, doi: 10.1109/TAP.2016.2623903.

[18]      M. H. Sadrearhami and A. A. Shishegar, "Propagation and Scattering Analysis in a 2D Rectangular Room Using Closed-Form Green's Function," in ist2016, Tehran, Iran, 2016.

[19]      F. Mokhtari-Koushyar and A. A. Shishegar, "Efficient Filon-type solution of highly oscillatory physical optics integrals by demodulating complementary error function," IET Microwaves, Antennas & Propagation, vol. 10, no. 6, pp. 638-644, 2016, doi: 10.1049/iet-map.2015.0385.

[20]      V. Mohtashami and A. A. Shishegar, "Sensitivity analysis of ray tracing to the geometrical description of the environment," IET Microwaves, Antennas & Propagation, vol. 10, no. 11, pp. 1225-1234, 2016, doi: 10.1049/iet-map.2015.0655.

[21]      M. A. K. Moghaddam, M. H. Sadrearhami, and A. A. Shishegar, "Evaluating the capacity of indoor millimeter wave MIMO system using closed-form Green's function," in 2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT), 20-22 Dec. 2016 2016, pp. 103-106, doi: 10.1109/MMWaTT.2016.7869927.

[22]      A. Torabi and A. A. Shishegar, "Combination of Characteristic Greenís Function Technique and Rational Funtion Fitting Method for Computation of Modal Reflectivity at the OpticalWaveguide End-Facet," in 3rd International Conference on Photonics, Optics and Laser Technology, Photoptic 2015, Germany, March 2015 2015.

[23]      A. Torabi and A. A. Shishegar, "Combined CGF-PML and CGF-RFFM for Efficient and Uniform Modal Derivation of Greenís Function of Planar Layered Media," in GeMiC 2015, Germany, 2015.

[24]      M.-K. F and A. A. Shishegar, "Physical optics integrals evaluation using closed-form expressions and triangular boundary-rectangular mesh algorithm," IET Microwaves, Antennas & Propagation, vol. 9, no. 15, pp. 1803-1808, 2015. [Online]. Available: http://ietdl.org/t/wkoZQ.

[25]      S. Barzegar-Parizi and A. A. Shishegar, "Electromagnetic Wave Scattering Analysis From 2-D Periodic Rough Surfaces Using Complex Images Technique," Geoscience and Remote Sensing, IEEE Transactions on, vol. 53, no. 2, pp. 862-868, 2015, doi: 10.1109/TGRS.2014.2329995.

[26]      R. Aminzadeh, M. Saviz, and A. A. Shishegar, "Characterization of Low-Cost Tissue Mimicking Materials at Millimeter-Wave Frequencies," in ICEE2015, Tehran, Iran, 2015.

[27]      A. Torabi, A. A. Shishegar, and R. Faraji-Dana, "Analysis of Modal Reflectivity of Optical Waveguide End-Facets by the Characteristic Green's Function Technique," Lightwave Technology, Journal of, vol. 32, no. 6, pp. 1168-1176, 2014, doi: 10.1109/JLT.2013.2297891.

[28]      A. Torabi, A. A. Shishegar, and R. Faraji-Dana, "An Efficient Closed-Form Derivation of Spatial Green's Function for Finite Dielectric Structures Using Characteristic Green's Function-Rational Function Fitting Method," Antennas and Propagation, IEEE Transactions on, vol. 62, no. 3, pp. 1282-1292, 2014, doi: 10.1109/TAP.2013.2295243.

[29]      A. Torabi and A. A. Shishegar, "An Efficient 2D Rough Surface Scattering Analysis Using Strong Harmonics Extraction and the Kirchhoff Approach," ACES Journal, vol. 29, no. 2, pp. 163-169, 2014.

[30]      A. Torabi and A. A. Shishegar, "An Accurate Derivation of Spatial Green's Function for Finite Dielectric Structures Using Characteristic Green's Function-Perfectly Matched Layer Method," Antennas and Propagation, IEEE Transactions on, vol. PP, no. 99, pp. 3201-3211, 2014, doi: 10.1109/TAP.2014.2315251.

[31]      F. Mokhtari-Koushyar and A. A. Shishegar, "The closed-form frequency-independent solution for physical optics integrals on conducting quadratic surfaces using rectangular meshing," in Telecommunications (IST), 2014 7th International Symposium on, 9-11 Sept. 2014 2014, pp. 134-139, doi: 10.1109/ISTEL.2014.7000684.

[32]      F. Mokhtari-Koushyar and A. A. Shishegar, "Scattering analysis of human body modeled by NURBS surfaces in MM-wave band," in Millimeter-Wave and Terahertz Technologies (MMWATT), 2014 Third Conference on, Dec. 30 2014-Jan. 1 2015 2014, pp. 1-4, doi: 10.1109/MMWaTT.2014.7057202.

[33]      V. Mohtashami and A. A. Shishegar, "Efficient and reliable ray tracing, some challenges and proposed solutions," in Antennas and Propagation (EuCAP), 2014 8th European Conference on, 6-11 April 2014 2014, pp. 1589-1592, doi: 10.1109/EuCAP.2014.6902089.

[34]      A. Mehdirezaei, A. H. Nateghi, and A. A. Shishegar, "Wideband Characterization of Electromagnetic Pulse Reflection from Lossy Dielectric Half-Space," in The 22nd Iranian Conference on Electrical Engineering (ICEE 2014), Tehran, Iran, 2014, pp. 1760-1764.

[35]      M. Boozari and A. A. Shishegar, "Indoor ultrawideband propagation modelling using Chebyshev interpolation in 60 GHz band based on ray tracing technique," in Millimeter-Wave and Terahertz Technologies (MMWATT), 2014 Third Conference on, Dec. 30 2014-Jan. 1 2015 2014, pp. 1-4, doi: 10.1109/MMWaTT.2014.7057199.

[36]      R. Aminzadeh, A. A. Shishegar, and M. Saviz, "Numerical and Experimental Assessment of Millimeter-Wave Reflectometry for Non-Invasive Diagnosis of Skin Cancers," in EuCAP 2014 - The 8th European Conference on Antennas and Propagation, The Hague, The Netherlands, 2014, pp. 1639-1643.

[37]      R. Aminzadeh, M. Saviz, and A. A. Shishegar, "Dielectric Properties Estimation of Normal and Malignant Skin Tissues at Millimeter-Wave Frequencies Using Effective Medium Theory," in The 22nd Iranian Conference on Electrical Engineering (ICEE 2014), Tehran, Iran, 2014.

[38]      R. Aminzadeh, M. Saviz, and A. A. Shishegar, "Theoretical and experimental broadband tissue-equivalent phantoms at microwave and millimetre-wave frequencies," Electronics Letters, vol. 50, no. 8, pp. 618-620, 2014, doi: 10.1049/el.2014.0749.

[39]      A. Torabi, A. A. Shishegar, and R. Faraji-Dana, "Application of the characteristic Green's function technique in closed-form derivation of spatial Green's function of finite dielectric structures," in Computational Electromagnetics Workshop (CEM), 2013, 2-5 Aug. 2013 2013, pp. 54-55, doi: 10.1109/CEM.2013.6617132.

[40]      A. Torabi and A. A. Shishegar, "An efficient closed-form expression of spatial Green's function for finite dielectric substrate using characteristic Green's function-perfectly matched layer method," in Microwave Conference (EuMC), 2013 European, 6-10 Oct. 2013 2013, pp. 1147-1150.

[41]      A. Torabi and A. A. Shishegar, "An Approximate Series Representation of Spatial Green's Function for Finite Dielectric Substrate Using CGF-PML Method," in ICEAA - IEEE APWC - EMS '13, Torino, Italy, 2013.

[42]      S. Mollai, S. M. Javadzadeh, A. A. Shishegar, A. Banai, F. Farzaneh, and M. Fardmanesh, "Analysis of Nonlinearities in Superconducting Microstrip Straight Bends; FDTD Method in Comparison with Nonlinear Circuit Modeling," (in English), J Supercond Nov Magn, vol. 26, no. 5, pp. 1827-1830, 2013/05/01 2013, doi: 10.1007/s10948-012-2025-z.

[43]      V. Mohtashami and A. A. Shishegar, "Effects of inaccuracy of material permittivities on ray tracing results for site- specific indoor propagation modeling," in Antennas and Propagation in Wireless Communications (APWC), 2013 IEEE-APS Topical Conference on, 9-13 Sept. 2013 2013, pp. 1172-1175, doi: 10.1109/APWC.2013.6624930.

[44]      V. Mohtashami and A. A. Shishegar, "Effects of geometrical uncertainties on ray tracing results for site-specific indoor propagation modeling," in Antennas and Propagation in Wireless Communications (APWC), 2013 IEEE-APS Topical Conference on, 9-13 Sept. 2013 2013, pp. 836-839, doi: 10.1109/APWC.2013.6624914.

[45]      S. Mollaei, A. A. Shishegar, F. Farzaneh, and A. Banai, "Analysis of Nonlinearities in Superconducting Microstrip Straight Bends; FDTD Method in Comparison with Nonlinear Circuit Modeling," in 3rd International Conference on Superconducivity and Magnetism, Istanbul, Turkey, 29 April-4 May 2012 2012.

[46]      V. Mohtashami and A. A. Shishegar, "Modified wavefront decomposition method for fast and accurate ray-tracing simulation," Microwaves, Antennas & Propagation, IET, vol. 6, no. 3, pp. 295-304, 2012, doi: 10.1049/iet-map.2011.0264.

[47]      V. Mohtashami and A. A. Shishegar, "Efficient ultrawideband propagation modelling by using the cubic B-spline function in ray tracing calculations," Microwaves, Antennas & Propagation, IET, vol. 6, no. 12, pp. 1347-1358, 2012, doi: 10.1049/iet-map.2012.0306.

[48]      A. Hasani and A. A. Shishegar, "Three-Dimensional Electromagnetic Wave Scattering Analysis Using RPIM-MLS Hybrid Meshless Method," in ICEE2012, 2012.

[49]      V. Mohtashami and A. A. Shishegar, "Using cubic B-spline interpolation for efficient ray-tracing-based ultrawideband propagation modeling," in Ultra-Wideband (ICUWB), 2011 IEEE International Conference on, 14-16 Sept. 2011 2011, pp. 12-15.

[50]      M. Eslami-Rasekh, A. A. Shishegar, and F. Farzaneh, "A study of the effect of diffraction and rough surface scattering modeling on ray tracing results in an urban environment at 60 GHz," International Journal of Information & Communication Technology, vol. 3, no. 2, pp. 27-33, March 2011.

[51]      M. M. Tajdini and A. A. Shishegar, "A Novel Analysis of Microstrip Structures Using the Gaussian Greenís Function Method," Ieee T Antenn Propag, vol. 58, no. 1, pp. 88-94, January 2010.

[52]      S. P. Shariatpanahi, B. H. Khalaj, A. A. Shishegar, and H. S. Rad, "Decorrelating closely spaced antennas by pattern design in uniform scattering environments," IET Microwaves, Antennas & Propagation, vol. 4, no. 11, pp. 1903-1909, Nov 2010, doi: 10.1049/iet-map.2010.0027.

[53]      M. Shabani and A. A. Shishegar, "Vectorial Gussian beam expansion for high-frequency wave propagation," IET Microwaves, Antennas & Propagation, vol. 4, no. 12, pp. 2014-2023, Dec 2010.

[54]      M. E. Rasekh, F. Farzaneh, and A. A. Shishegar, "A Street canyon approximation model for the 60 GHz propagation channel in an urban environment with rough surfaces," in 5th International Symposium on Telecommunications (IST), 4-6 Dec. 2010 2010, pp. 132-137.

[55]      A. Mokhtari and A. A. Shishegar, "Rigorous 3d vectorial gaussian beam modeling of demultiplexing performance of virtually-imaged-phased-arrays," Progress In Electromagnetics Research M, vol. 13, pp. 1-16, 2010, doi: 10.2528/PIERM10041604.

[56]      V. Mohtashami and A. A. Shishegar, "Inaccurate path correction in ray tracing using ray expansion method," in 2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC), Istanbul, Turkey, 26-30 Sept. 2010 2010, pp. 324-328.

[57]      V. Mohtashami and A. A. Shishegar, "Efficient shooting and bouncing ray tracing using decomposition of wavefronts," IET Microwaves, Antennas & Propagation, vol. 4, no. 10, pp. 1567-1574, Oct 2010, doi: 10.1049/iet-map.2009.0240.

[58]      V. Mohtashami and A. A. Shishegar, "Accuracy and computational efficiency improvement of ray tracing using line search theory," IET Microwaves, Antennas & Propagation, vol. 4, no. 9, pp. 1290-1299, Sep 2010, doi: 10.1049/iet-map.2009.0365.

[59]      V. Mohtashami, S. Parsa, and A. A. Shishegar, "Efficient enhancement of the accuracy of Ray tracing," in 2010 IEEE Antennas and Propagation Society International Symposium (APSURSI), Toronto, Canada, 11-17 July 2010 2010, pp. 1-4.

[60]      A. Kianinezhad and A. A. Shishegar, "Periodic rough surface scattering analysis using spectral FDTD method," in 2010 IEEE Antennas and Propagation Society International Symposium (APSURSI), Toronto, Canada, 11-17 July 2010 2010, pp. 1-4.

[61]      S. Barzegar-Parizi and A. A. Shishegar, "Electromagnetic scattering from perfectly conducting periodic rough surfaces using complex images technique," in 2010 IEEE Antennas and Propagation Society International Symposium (APSURSI), Toronto, Canada, 11-17 July 2010 2010, pp. 1-4.

[62]      A. Torabi and A. A. Shishegar, "Scattering Computation of Slightly Rough Gaussian Surfaces by Kirchhoff Approach with Harmonic Extraction Analysis," in International Conference on Microwave Technology and Computational Electromagnetics (ICMTCE 2009), Beijing, China, 3-6 Nov. 2009 2009, pp. 292-295.

[63]      A. Torabi and A. A. Shishegar, "Fresnel Coefficients Correction for Asphalt Surfaces in Millimeter Waves Band," in International Symposium on Antennas and Propagation (ISAP 2009), Bangkok, Thailand, October 20-23, 2009 2009, pp. 1203-1206.

[64]      A. Torabi and A. A. Shishegar, "Scattering with Reinforced Concrete Wall in 900-MHz Band Using MOM/CI Method," in 3rd European Conference on Antennas and Propagation (EuCAP), Berlin, Germany, 23-27 March 2009, pp. 121-125.

[65]      S. Parsa and A. A. Shishegar, "A Ray Tracing Acceleration Technique for Wave Propagation Modeling," in Asia-Pacific Microwave Conference (APMC 2009), Singapore, December 7-10, 2009 2009, pp. 1100-1103.

[66]      A. Naqavi, S. AlaviRad, M. Shabani, and A. A. Shishegar, "An Iterative Scheme for Gaussian Beam Expansion of Electromagnetic Waves," in International Conference on Microwave Technology and Computational Electromagnetics (ICMTCE 2009), Beijing, China, 3-6 Nov. 2009 2009, pp. 316-318.

[67]      A. Mokhtari and A. A. Shishegar, "A Rigorous Vectorial Gaussian Beam Modeling of Spectral Dispersing Performance of Virtually-Imaged-Phased-Arrays," Journal of the Optical Society of America B, JOSA B: Optical Physics, vol. 26, no. 2, pp. 272-278, 2009.

[68]      V. Mohtashami and A. A. Shishegar, "Application of Wavefront Decomposition to Ray Tube Tracing," in The First Conference on Millimeter Wave & Terahertz Technologies (MMWaTT), Tehran, Iran, 2009, pp. 5-9.

[69]      M. Eslami-Rasekh and A. A. Shishegar, "A Study of the Effect of Diffraction and Rough Surface Scatter Modeling on Ray Tracing Results in an Urban Environment at 60 GHz," in The First Conference on Millimeter Wave & Terahertz Technologies, Tehran, Iran, 2009, pp. 27-31.

[70]      M. Atamanesh and A. A. Shishegar, "Path Loss Estimation in Millimeter Wave Band Wireless Communication Network in a Rainy Condition," in International Symposium on Antennas and Propagation (ISAP 2009), Bangkok, Thailand, October 20-23, 2009 2009, pp. 516-519.

[71]      F. Arvani and A. A. Shishegar, "A Novel Model for Complex Permittivity of Glass for Propagation Modeling in Millimeter-Wave Band," in Mediterranean Microwave Symposium (MMS2009), Tangiers, Morocco, November 2009 2009, pp. 1-4.

[72]      S. AlaviRad, M. Shabani, A. Naqavi, and A. A. Shishegar, "Vectorial Gaussian Beam Tracing Method for Millimeter Wave Propagation Modelling in a Large Scale Media," in Mediterranean Microwave Symposium (MMS2009), Tangiers, Morocco, November 2009 2009, pp. 1-4.

[73]      M. M. Tajdini and A. A. Shishegar, "A Closed Form Spatial Green's Function for the Microstrip Structure Using the Gaussian Expansion," in Asia Pacific Microwave Conference 2008, Hong Kong, 16-19 December 2008 2008.

[74]      M. M. Tajdini and A. A. Shishegar, "The Gaussian Expansion of the Green's Function of an Electric Current in a Parallel-Plate Waveguide," in 2008 IEEE INTERNATIONAL RF AND MICROWAVE CONFERENCE, KUALA LUMPUR, MALAYSIA, 2-4th DECEMBER, 2008 2008, pp. 223-225.

[75]      P. Shariatpanahi, A. A. Shishegar, B. H. Khalaj, A. H. Salavati, and H. S. Rad, "Low SNR regime capacity analysis of MIMO systems using directional antennas," in Telecommunications, 2008. IST 2008. International Symposium on, 27-28 Aug. 2008 2008, pp. 393-398.

[76]      P. Shariatpanahi, B. Hossein Khalaj, A. A. Shishegar, and H. Saligheh Rad, "Decorrelating Closely-Placed Antennas by Pattern Design in Uniform Scattering Environments," in The 10th International Conference on Advanced Communication Technology, ICACT2008, Seoul, Korea, Feb. 17-20, 2008 2008, pp. 2092-2095.

[77]      M. Safari and A. A. Shishegar, "Analysis of Degree of Polarization as a Control Signal in PMD Compensation Systems Aided by Polarization Scrambling," Lightwave Technology, Journal of, vol. 26, no. 16, pp. 2865-2872, 2008.

[78]      H. Rastegarfar and A. A. Shishegar, "Three-dimensional finite-difference time-domain analysis of nonlinear self-focusing in air," in 2008 International Symposium on Telecommunications, IST 2008, 27-28 Aug. 2008 2008, pp. 163-168.

[79]      H. Rastegarfar and A. A. Shishegar, "Three-dimensional finite-difference time-domain analysis of gas ionization," in 2008 International Symposium on Telecommunications, IST 2008, 27-28 Aug. 2008 2008, pp. 157-162.

[80]      A. Rashidi, A. A. Shishegar, and A. Banai, "Fast Field Computation of Ferrite Junction Circulators by Finite Difference Method with Comparison by Bosmaís Greenís Function," in 16th Iranian Conference on Electrical Engineering, ICEE2008, Tehran, Iran, May 13-15, 2008 2008.

[81]      A. Mokhtari and A. A. Shishegar, "A design algorithm for VIPA-based spectral-phase-coded OCDMA encoder," in 2008 International Conference on Photonics in Switching, PS 2008, 2008, pp. 1-2.

[82]      V. Mohtashami and A. A. Shishegar, "A New Ray Tracing Acceleration Technique Based on Decomposition of Wavefronts," in Asia Pacific Microwave Conference 2008, Hong Kong, 16-19 December 2008 2008.

[83]      V. Mohtashami and A. A. Shishegar, "A New Double Counting Cancellation Technique for Ray Tracing Using Separation Angle Distribution," in 2008 IEEE INTERNATIONAL RF AND MICROWAVE CONFERENCE, KUALA LUMPUR, MALAYSIA, 2-4th DECEMBER, 2008 2008, pp. 437-441.

[84]      M. Golparvar Roozbahani, E. Jedari, and A. A. Shishegar, "A New Link-Level Simulation Procedure of Wideband MIMO Radio Channel for Performance Evaluation of Indoor WLANs," Progress In Electromagnetics Research, vol. PIER 83, pp. 13-24, 2008.

[85]      R. Alihemmati, G. Dadashzadeh, A. A. Shishegar, and N. Hojjat, "Smart Antennas for OFDM-WLANs Based on a Spatial-Temporal Multi-Scenario Channel Model," Iranian Journal of Electrical and Computer Engineering, vol. 7, no. 2, pp. 107-114, 2008.

[86]      M. Shabani and A. A. Shishegar, "A novel diffraction analysis technique of a 3D Gaussian beam from a wedge," in Iranian Conference on Electrical Engineering-ICEE2007, Tehran, Iran, April 2007 2007, pp. 69-74.

[87]      A. Mokhtari and A. A. Shishegar, "A rigorous vectorial Gaussian beam modeling of Virtually-Imaged- Phased-Array," in 2007 Asia Optical Fiber Communication and Optoelectronics Conference, Shanghai, China, A. A. Shishegar, Ed., 17-19 Oct. 2007 2007, pp. 514-516.

[88]      R. Mirzavand, A. Abdipour, and A. A. Shishegar, "FDTD Analysis of Distributed Amplifiers Based on the Fully Distributed Model," in 2007 ASIA Ė PACIFIC CONFERENCE ON APPLIED ELECTROMAGNETICS, MELAKA, MALAYSIA, 4-6 DECEMBER 2007 2007.

[89]      M. Shabani and A. A. Shishegar, "Millimeter wave propagation in a short outdoor link using the vectorial Gaussian beam tracing method," in 2006 Asia-Pacific Microwave Conference, APMC 2006, Yokohama, Japan, S. Amir Ahmad, Ed., 12-15 Dec. 2006 2006, pp. 1851-1854.

[90]      M. Safari and A. A. Shishegar, "A Simple and Fast First-order PMD Compensator Using a Polarizer " in The 5th International Conference on Optical Communications and Networks / The 2nd International Symposium on Advances and Trends in Fiber Optics and Applications (ICOCN/ ATFOí06), Chengdu, China, September 2006 2006, 2006, pp. 282-285.

[91]      N. Noori, A. A. Shishegar, and E. Jedari, "A new double counting cancellation technique for three-dimensional ray launching method," in 2006 IEEE Antennas and Propagation Society International Symposium, Albuquerque, NM, USA, 2006: IEEE, in 2006 IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No. 06CH37758C), pp. 2185-8.

[92]      E. Jedari, M. Golparvar Roozbahani, A. A. Shishegar, A. R. Enayati, and R. Alihemmati, "A new wideband MIMO channel model for simulating 5-GHz band indoor WLANs," in 2006 IEEE 64th Vehicular Technology Conference, VTC-2006, Montreal, QC, Canada, Fall 2006 2006: Institute of Electrical and Electronics Engineers Inc., Piscataway, NJ 08855-1331, United States, in IEEE Vehicular Technology Conference, pp. 2298-2303. [Online]. Available: http://dx.doi.org/10.1109/VTCF.2006.474. [Online]. Available: http://dx.doi.org/10.1109/VTCF.2006.474

[93]      M. Golparvar Roozbahani, E. Jedari, A. A. Shishegar, R. Alihemmati, and A. Enayati, "A parametric double-directional wideband model for indoor MIMO channel at 5-GHz band," in 2006 IEEE Antennas and Propagation Society International Symposium, Albuquerque, NM, USA, 2006: IEEE, in 2006 IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No. 06CH37758C), pp. 3073-6.

[94]      M. Golparvar Roozbahani, E. Jedari, A. A. Shishegar, R. Ali-Hemmati, and A. R. Enayati, "Mimo Channel Modeling for Indoor WLANs and Measurement Hints," in Iranian Conference on Electrical Engineering, ICEE 2006, Tehran, Iran, April 2006 2006.

[95]      M. Golparvar Roozbahani, E. Jedari, A. Enayati, R. Alihemmati, and A. A. Shishegar, "A New Link-Level Simulation Procedure of Wideband MIMO Radio Channel for Performance Evaluation of Indoor WLANs," in The 17th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRCí06, Helsinki, Finland, September 11-14, 2006 2006.

[96]      A. R. Enayati et al., "Reduced complexity maximum likelihood multiuser detection for OFDM-based IEEE 802.11a WLANs utilizing post-FFT mode," in 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, Helsinki, Finland, 2006: IEEE, in 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No. 06TH8881), p. 5 pp.

[97]      R. Alihemmati, E. Jedari, A. R. Enayati, A. A. Shishegar, M. G. Roozbahani, and G. Dadashzadeh, "Performance of the Pre/Post-FFT Smart Antenna Methods for OFDM-Based Wireless LANs in an Indoor Channel with Interference," in 2006 IEEE International Conference on Communications, ICC '06, 2006, vol. 9, pp. 4291-4296.

[98]      A. A. Shishegar, N. Hojjat, R. Alihemmati, G. Dadashzadeh, A. Mehrtash, and B. Boghrati, "The effect of the number of smart antenna elements on the performance of 802.11a WLAN with pre and post-FFT methods," in International Symposium in Telecommunications, IST2005, Shiraz, Iran, Seprember 10-12, 2005 2005, pp. 321-326.

[99]      A. A. Shishegar, "Optical fiber sensors in oil and gas industry," in Data Communication & Control in Oil Industry Seminar, Sharif Yniversity of Technology, Tehran. Iran, September 2005 2005, pp. 193-201.

[100]   M. Safari and A. A. Shishegar, "Polarization-mode dispersion modeling with a new distribution for coupling lengths," in International Symposium on Telecommunications, IST2005, Shiraz, Iran, September 2005 2005.

[101]   N. Hojjat et al., "A matlab simulink model for simulation of post-FFT smart antenna in 802.11a standard," in IEEE Antennas and Propagation Society, AP-S International Symposium, Washington, DC, United States, 2005, vol. 4 A: Institute of Electrical and Electronics Engineers Inc., Piscataway, NJ 08855-1331, United States, in IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), pp. 34-37. [Online]. Available: http://dx.doi.org/10.1109/APS.2005.1552574. [Online]. Available: http://dx.doi.org/10.1109/APS.2005.1552574

[102]   N. Hojjat, A. Mehrtash, B. Boghrati, G. Dadashzadeh, A. A. Shishegar, and R. Alihemmati, "Post-FFT Smart Antenna for Interference Cancellation in an OFDM Based WLAN," in International Symposium on Telecommunications, IST2005, Shiraz, Iran, September 10-12, 2005 2005, pp. 729-732.

[103]   R. Alihemmati, A. A. Shishegar, N. Hojjat, G. Dadashzadeh, B. Boghrati, and A. Mehrtash, "Comparison of the smart antenna architectures for OFDM-WLAN systems in a rich multipath environment based on a spatio-temporal channel model," in IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, Berlin, Germany, 2005, vol. 1: Institute of Electrical and Electronics Engineers Inc., Piscataway, NJ 08855-1331, United States, in IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, pp. 97-101.

[104]   S. Aghli Moghaddam, N. Masoumi, P. Jabbedar, and A. A. Shishegar, "Analysis and simulation of a novel gradually low-K dielectric structure for crosstalk reduction in VLSI," in International Conference on Microelectronics, ICM, Islamabad, Pakistan, 2005, vol. 2005: Institute of Electrical and Electronics Engineers Inc., Piscataway, NJ 08855-1331, United States, in Proceedings of the International Conference on Microelectronics, ICM, pp. 110-115. [Online]. Available: http://dx.doi.org/10.1109/ICM.2005.1590049. [Online]. Available: http://dx.doi.org/10.1109/ICM.2005.1590049

[105]   M. Vahidpour and A. A. Shishegar, "Reflection analysis of the end-facet dielectric slab waveguide by FDTD method," in 3rd International Conference on Computational Electromagnetics and its Applications, ICCEA 2004 Beijing, China, 2004: Institute of Electrical and Electronics Engineers Inc., New York, NY 10016-5997, United States, in ICCEA 2004 - 2004 3rd International Conference on Computational Electromagnetics and its Applications, Proceedings, pp. 453-456.

[106]   A. A. Shishegar, "Scattering of a Gaussian beam by a spherical dielectric object using the vectorial Gaussian beam tracing method," in 3rd International Conference on Computational Electromagnetics and its Applications, ICCEA 2004 Beijing, China, 2004: Institute of Electrical and Electronics Engineers Inc., New York, NY 10016-5997, United States, in ICCEA 2004 - 2004 3rd International Conference on Computational Electromagnetics and its Applications, Proceedings, pp. 72-75.

[107]   A. Rohani, A. A. Shishegar, and S. Safavi-Naeini, "A fast Gaussian beam tracing method for reflection and refraction of general vectorial astigmatic Gaussian beams from general curved surfaces," Optics Communications, vol. 232, no. 1-6, pp. 1-10, 2004. [Online]. Available: http://dx.doi.org/10.1016/j.optcom.2003.11.044.

[108]   A. A. Shishegar and R. Faraji-Dana, "A closed-form spatial Green's function for finite dielectric structures," Electromagnetics, vol. 23, no. 7, pp. 579-594, 2003. [Online]. Available: http://dx.doi.org/10.1080/02726340390237183.

[109]   A. A. Shishegar, "A unified Greenís function analysis of finite dielectric structures by CGF-CI technique," Ph. D. thesis, University of Tehran, Iran, 2003.

[110]   A. A. Shishegar, R. Faraji-Dana, and S. Safavi-Naeini, "Finite Substrate Microstrip Transmission Line Analysis Using the Characteristic Green's Function-Complex Images Technique," in 32nd European Microwave Conference, 2002 2002, pp. 1-4.

[111]   A. A. Shishegar and R. Faraji-Dana, "A novel Greenís function analysis of microstripline structures with finite substrare,," in 9th International Symposium on Antenna Technology and Applied Electromagnetics,  ANTEM 2002, Montreal, Canada, July 2002 2002, pp. 168-171.

[112]   A. A. Shishegar and R. Faraji-Dana, "A Closed form Greenís function of a 2-D truncated dielectric slab waveguide using the Characteristic Greenís Function (CGF) and the complex images techniques," in 10th Iranian Conference on Electrical Engineering 2002, Tabriz, Iran, 2002, pp. 374-381.

[113]   A. A. Shishegar and R. Faraji-Dana, "A novel Green's function analysis of finite substrate effects in antennas and microwave integrated circuits (MIC's)," in 2002 IEEE Antennas and Propagation Society International Symposium, APS2002, San Antonio, TX, United States, 2002, vol. 1: Institute of Electrical and Electronics Engineers Inc., Piscataway, NJ 08855-1331, United States, in IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), pp. 176-179. [Online]. Available: http://dx.doi.org/10.1109/APS.2002.1016278. [Online]. Available: http://dx.doi.org/10.1109/APS.2002.1016278

[114]   M. Akhavan-Bahabadi, A. A. Shishegar, and R. Faraji-Dana, "A Novel Technique for Field Propagation Analysis Using the Zero-Order Gaussian Beams," in 10th Iranian Conference on Electrical Engineering 2002, Tabriz, Iran, 2002, pp. 19-26.

[115]   M. Akhavan-Bahabadi, A. A. Shishegar, and R. Faraji-Dana, "Far field pattern computation of a double-slot antenna on elliptical silicon dielectric lens using vectorial Gaussian beam," in 2002 IEEE Antennas and Propagation Society International Symposium, APS2002, San Antonio, TX, United States, 2002, vol. 3: Institute of Electrical and Electronics Engineers Inc., Piscataway, NJ 08855-1331, United States, in IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), pp. 332-335.

[116]   A. A. Shishegar, S. Safavi-Naeini, R. Faraji-Dana, and C. Xu, "Laser-diode to fiber coupling analysis using the Gaussian beam-BPM hybrid method," in 8th Symposium on Antenna and Applied Electromagnetics,  ANTEM 2000, Winnipeg, Manitoba, Canada, 2000: Univ. Manitoba, in ANTEM 2000. Symposium on Antenna Technology and Applied Electromagnetics. Conference Proceedings, pp. 519-522.

[117]   A. A. Shishegar and S. Safavi-Naeini, "A hybrid analysis method for planar lens-like structures," in 1996 IEEE Antennas and Propagation Society International Symposium, APS1996, Baltimore, MD, USA, 1996, vol. 3: IEEE, Piscataway, NJ, USA, in IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), pp. 2012-2015. [Online]. Available: http://dx.doi.org/10.1109/APS.1996.550002. [Online]. Available: http://dx.doi.org/10.1109/APS.1996.550002

[118]   A. A. Shishegar and S. Safavi-Naeini, "A New Analysis Method for Lens-Like Star Coupler," in 3rd Iranian Conference on Electrical Engineering 1995, Tehran, Iran, 1995, pp. 114-120.

[119]   Y. Golestani, A. A. Shishegar, and S. A. Shams, "LIDARS and their Application for Air Pollution Control," in Eight Iranian Geophysical Seminar, Tehran, Iran, November 1993 1993, pp. 91-92.

 

 

 

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Last modified: Nov. 6, 2023