Ali Darwish

Contact

[email protected]

Program

Electrical and Computer Engineering

Education History

B S Electrical Engineering, University of Maryland
M S Electrical Engineering, University of Maryland
Ph D Electrical Engineering, Massachusetts Institute of Technology

Work Experience

Group Leader, U.S. Army Research Laboratory

Publications

Journal Papers
1. I Jaffri, A Ayed, Ali Darwish, P. Mitran, and Slim Boumaiza, “Analysis and Linearization of Frequency-Multiplier-Based RF Beamformers’ Behavior Over A Wide Steering Range,” submitted to IEEE Trans. of Microwave Theory and Techniques, 2020.
2. I Jaffri, A Ayed, Ali Darwish, P. Mitran, and Slim Boumaiza, “Novel Baseband Equivalent Model for Digital Predistortion of Wideband Frequency Multiplier-Based Millimeter Wave Sources,” IEEE Trans. of Microwave Theory and Techniques, 2020.
3. Arthur Chung, Marwen Ben Rejeb, Yehia Beltagy, Ali M. Darwish, H. Alfred Hung, and Slim Boumaiza, “Analysis and Compensation of Non-idealities in Frequency Multiplier Based High Frequency Vector Signal Generators,” accepted, IEEE Transactions on Microwave Theory and Techniques, 2019.
4. K. McKnight, Ali Darwish, M. Zaghloul, “A Compact Output Power Combiner for Broadband Doherty Power Amplifiers” accepted, Electronics Journal, 2019.
5. Arthur Chung, Marwen Ben Rejeb, Yehia Beltagy, Ali M. Darwish, H. Alfred Hung, and Slim Boumaiza, “IQ Imbalance Compensation and Digital Predistortion for Millimeter Wave Transmitters Using Reduced Sampling Rate Observations,” IEEE Transactions on Microwave Theory and Techniques, 2018.
6. Ali Darwish, Amr A. Ibrahim, Joe Qiu, Ed Viveiros, and H. Alfred Hung “A Broadband 1-to-N Power Divider/Combiner with Isolation and Reflection Cancellation,” IEEE Transactions on Microwave Theory and Techniques, April 2015.
7. Ali Darwish, “Microwave and EM Education: Overcoming the Disconnect,” IEEE Microwave Magazine, Sept., 2015.
8. A. M. Darwish; A. Bayba, H.A. Hung, “Channel Temperature Analysis of GaN HEMTs with Nonlinear Thermal Conductivity,” IEEE Trans. on Electron Devices, vol. 62, issue 3, 2015.
9. A. M. Darwish; A. Bayba, H.A. Hung, “Calculation of Nonlinear Junction Temperature for Semiconductor Devices using Linear Temperature Values,” IEEE Trans. on Electron Devices, vol. 59, issue 8, pp. 2123 – 2128, 2012.
10. Amr A. Ibrahim, Ali M. Darwish, H. A. Hung, “Invariance Property of the μ stability test with respect to the Characteristic Impedance,” International Journal of Microwave Science and Technology, Article ID 865625, doi:10.1155/2012/865625, 2012.
11. A. M. Darwish; A. Bayba, H.A. Hung, “AlGaN/GaN HEMT with Distributed Gate for Temperature Reduction,” IEEE Transactions on Microwave Theory and Techniques, vol. 60, no. 4, 1038 – 1043, 2012.
12. Ali M. Darwish, H. Alfred Hung, Amr A. Ibrahim “Temperature Dependence of GaN HEMT Small Signal Parameters,” International Journal of Microwave Science and Technology, Vol. 2011, December 2011, doi:10.1155/2011/945189.
13. J. Qiu, Ali Darwish, E.A. Viverios and H.A. Hung “Linearity Characterization and Optimization of Millimeter-Wave GaN HEMTs,” IEEE Trans. on Microwave Theory and Techniques, vol. 59, issue 12, 3419 – 3427, 2011.
14. Thomas J. Farmer, Ali Darwish, Benjamin Huebschman, Edward Viveiros, Mona E. Zaghlou, “High Power Density SiGe Millimeter-Wave Power Amplifiers,” International Journal of Microwave and Wireless Technologies, vol. 3, issue 6, pp. 615-620, December, 2011.
15. Ali M. Darwish, H. Alfred Hung, “Improving Thermal Reliability of FETs and MMICs,” IEEE Trans. on Device and Materials Reliability, vol. 11, no. 1, pp. 164 – 170, 2011.
16. Ali M. Darwish, H. Alfred Hung, “Accurate Determination of Thermal Resistance of HBTs,” IEEE Trans. on Microwave Theory and Techniques, vol. 59, no. 3, pp. 652 – 659, 2011.
17. Ali M. Darwish, H. Alfred Hung, Edward Viveiros, and Amr A. Ibrahim, “Broadband AlGaN/SiC MMIC Amplifier,” International Journal of Microwave and Wireless Technologies, volume 3, issue 04, pp. 399-404, 2011.
18. Thomas J. Farmer, Ali Darwish, Benjamin Huebschman, Edward Viveiros, H. Alfred Hung, Mona E. Zaghloul, “Millimeter-wave SiGe HBT High Voltage/High Power Architecture Implementation,” IEEE Microwave and Wireless Components Letters, vol. 21, issue 10, pp. 544-546, 2011.
19. Thomas J. Farmer, Ali Darwish, and Mona E. Zaghloul, “A 2.4 GHz SiGe HBT High Voltage/High Power Amplifier,” IEEE Microwave and Guided wave letters, vol. 20, issue 5, pp. 286 – 288, 2010.
20. A. M. Darwish; B. Huebschman, E. Viveiros, H. Alfred Hung, “Dependence of GaN HEMT mm-Wave Performance on Temperature,” IEEE Transactions on Microwave Theory and Techniques, Volume 57, Issue 12, Part 2, pp: 3205 – 3211, 2009.
21. A. M. Darwish; Bayba, A.J.; Hung, H.A., “Utilizing Diode Characteristics for GaN HEMT Channel Temperature Prediction,” IEEE Transactions on Microwave Theory and Techniques, Volume 56, Issue 12, Part 2, pp: 3188 – 3192, Dec. 2008.
22. Ali M. Darwish, K. Boutros, B. Luo, B. Huebschman, E. Viveiros, and H. A. Hung, “AlGaN/GaN Ka-Band MMIC 5-W Amplifier,” IEEE Trans. On Microwave Theory and Tech., vol. 54, issue 12, Part 2, 4456– 4463, 2006.
23. Ali M. Darwish, A. Bayba, and H. A. Hung, “Accurate Determination of Thermal Resistance of FETs,” IEEE Trans. on Microwave Theory and Tech., vol. 53, issue 1, 306-313, 2005.
24. Ali M. Darwish, A. Bayba, and H. A. Hung, “Thermal Resistance Calculation of AlGaN/GaN Devices,” IEEE Trans. on Microwave Theory and Tech, vol. 52, issue 11, 2611 – 2620, 2004.
25. A. M. Darwish, A. Ezzeddine, H. C. Huang, and M. Mah, “Analysis of Three-dimensional Embedded Transmission Lines (ETL),” IEEE Microwave and Guided Wave Letters, vol. 9, No. 11, 447-449, 1999.
26. A. M. Darwish, A. Ezzeddine, H. C. Huang, and M. Mah, “Properties of the Embedded Transmission Line (ETL)-An Offset Stripline With Two Dielectrics,” IEEE Microwave and Guided Wave Letters, vol. 9, 224-226, 1999.
27. A. M. Darwish, E. P. Ippen, H. Q. Le, J. P. Donnelley, S. H. Groves, E. A. Swanson, “Optimization Of Four Wave Mixing Conversion Efficiency In The Presence Of Nonlinear Loss,” Appl. Phys. Lett., March 8, 1996.
28. A. M. Darwish, E. P. Ippen, H. Q. Le, J. P. Donnelley, S. H. Groves, E. A. Swanson, “Short Pulse Wavelength Shifting by Four Wave Mixing in Passive InGaAsP/InP Waveguides,” Appl. Phys. Lett., 68 (15), April 8, 1996.
29. J. P. Donnelley, H. Q. Le, E. A. Swanson, S. H. Groves, A. M. Darwish, E. P. Ippen, “Nondegenerate Four-Wave Mixing in Low-Loss Passive InGaAsP/InP Quantum-Well Waveguides,” Photonics Tech. Lett., vol. 8, no. 5, p. 623, 1996.
30. K. L. Hall, G. Lenz, A. M. Darwish, E. P. Ippen, “Subpicosecond Gain and Index Nonlinearities in InGaAsP Diode Lasers, ” Optics Comm., vol. 111, 589-612, 1994.
31. K. L. Hall, A. M. Darwish, E. P. Ippen, U. Koren, and G. Raybon, “Femtosecond index nonlinearities in InGaAsP optical amplifiers,” Appl. Phys. Lett., 62 (12), 1320, 1993.

Refereed Conference Papers
32. Sami Hawasli, J Penn, K Kingkeo, Ali Darwish, “Power Combining Using Time Folding,” GOMAC Tech., 2021.
33. Ali Darwish et. al., “63 GHz 2.4 GB/s OFDM Wideband Signal Generation Using a Frequency Tripler,” GOMAC 2020, March 2020.
34. I Jaffri, A Ben Ayed, Ali Darwish, and Slim Boumaiza, “High-Frequency Vector-Modulated Signal Generation Using Frequency-Multiplier-Based RF Beamforming Architecture,” IEEE International Microwave Symposium, 2020.
35. Ali M. Darwish, A. Chung, M. Rejeb, S. Boumaiza, “25 GHz Wideband Modulated Signal Generation Using Frequency Doubler,” GOMAC Tech., Albuquerque, NM, 2019.
36. S. Lardizabal, J. Penn, Ali M. Darwish, “Widebnd low noise MMIC’s using millimeter-wave GaN HEMT for next generation radar from S-band to X-band and beyond,” GOMAC Tech., Albuquerque, NM, 2019.
37. Arthur Chung, Marwen Ben Rejeb, Yehia Beltagy, Ali M. Darwish, H. Alfred Hung, and Slim Boumaiza, “Frequency Doubler Based Outphasing System for Millimeter Wave Vector Signal Generation,” 15th European Radar Conference, 2018.
38. Arthur Chung, Marwen Ben Rejeb, Yehia Beltagy, Ali M. Darwish, H. Alfred Hung, and Slim Boumaiza, “High frequency and wideband modulated signal generation using frequency doublers,” IEEE Int’l Microwave Symposium, Philadelphia, PA, 2018.
39. Ali Darwish, et. al. “Multi-Octave GaN MMIC Circulator for Simultaneous Transmit-Receive Applications,” IEEE Int’l Microwave Symposium, Philadelphia, PA, 2018.
40. Ali M. Darwish, Kenneth McKnight, John Penn, Edward Viveiros, A. Hedden, H. Alfred Hung, “Next Generation Radar,” IEEE Compound Semiconductor IC Symposium, Miami, FL, 2017. Invited.
41. Ali M. Darwish, Edward Viveiros, and H. Alfred Hung “Broadband Power Combiner/Divider,” GOMAC Tech., Reno, NV, 2017.
42. L. Lamers, Z. Hays, C. Kappelmann, S. Rezayat, M. Fellows, E. Walden, A. Egbert, C. Baylis, R. J. Marks II, Ed Viveiros, J. Penn, A. Hedden, Ali Darwish, “Comparison of Bias-Voltage and Reflection-Coefficient Based Reconfiguration of a Tunable-Varactor Matching Network for Adaptive Amplifiers,” IEEE WAMICON, Cocoa Beach, FL, 2017.
43. S. Rezayat, Z. Hays, C. Kappelmann, M. Fellows, L. Lamers, C. Baylis, E. Viveiros, A. Hedden, J. Penn, R. J. Marks II, and Ali Darwish, “Real-Time Amplifier Impedance Optimization Using a Nonlinear Tunable Varactor Matching Network with Power-Dependent Characterization,” URSI National Radio Science Meeting, Boulder, CO, 2017.
44. Z. Hays, C. Kappelmann, S. Rezayat, M. Fellows, L. Lamers, M. Flachsbart, J. Barlow, C. Baylis, E. Viveiros, Ali Darwish, A. Hedden, J. Penn2, R.J. Marks II, “Real-Time Amplifier Optimization Algorithm for Adaptive Radio Using a Tunable-Varactor Matching Network,” IEEE Radio Wireless Week, Phoenix, AZ 2017.
45. Ali M. Darwish, Joe Qiu, Edward Viveiros, and H. Alfred Hung “Efficient Linear Transmission of Complex Waveforms at 216 GHz Using Nonlinear Multiplier Chains,” IEEE Int’l Microwave Symposium, San Francisco, CA, 2016.
46. Ali M. Darwish, K. McKnight, Mona Zaghloul, Edward Viveiros, and H. Alfred Hung “Simple Broadband Gysel Combiner with a Single Coupled Line,” IEEE Int’l Microwave Symposium, San Francisco, CA, 2016.
47. Ali M. Darwish, Joe Qiu, Edward Viveiros, and H. Alfred Hung “A 220 GHz Communications Link Utilizing Frequency Multipliers,” GOMAC Tech., Orlando, FL, 2016.
48. Ali M. Darwish, H. Alfred Hung, Joe Qiu, Amr Ibraheem, and Edward Viveiros, “Broadband 1-to-N Circuit Combiner for mm-wave Applications,” 2015 International Symposium on Microelectronics, vol. 2015, no. 1, pp. 776-780, 2015.
49. Ali Darwish, Amr A. Ibrahim, Joe Qiu, Ed Viveiros, and H. Alfred Hung “Divider/Combiner with Enhanced Isolation and Reflection Cancellation,” IEEE Int’l Microwave Symposium, Phoenix, AZ, 2015.
50. A. Darwish, H. Alfred Hung, J. Qiu, A. Ibrahim, E. Viveiros, “Broadband 1-to-N Circuit combiner for mm-wave Applications”, IMAPS, FL, 2015.
51. Ali Darwish, Amr A. Ibrahim, Joe Qiu, Ed Viveiros, and H. Alfred Hung “GaN Power MMIC with Novel Divider/Combiner for Broadband Applications,” in GOMAC Tech., St. Louis, MO, 2015.
52. K. Nassar, A. Safwat, A. Darwish, S. ElHenawy, M. Wagih, I. Mashally, O. Mohamed, “Designing a light redirecting system for southern skies,” Building Simulation and Optimisation 2014, June 24, London, 2014.
53. Ahmed Khorshid, Ali Darwish, “High Efficiency Broadband Class J Power Amplifier for a Cognitive Radio System,” IEEE Int’l Microwave Symposium, 2014.
54. Ali Darwish, Amr A. Ibrahim, Joe Qiu, Ed Viveiros, and H. Alfred Hung “Novel Ka-Band ‘Offset-Divider/Combiner’ with Reflection Cancellation,” IEEE Int’l Microwave Symposium, Tampa, FL, 2014.
55. A. Elkady, Mohamed El-Hadidy, A. Medhat, A. Khorshid, and Ali Darwish, “Millimeter Wave Power Dissipation/Penetration in Human Body for Non-invasive Glucose Monitoring,” Progress in Electromagnetics Research Symposium, 12-15 August 2013, Stockholm, Sweden.
56. Ahmed Eissa Fathy Khorshid, Ali M. Darwish, Islam A. Eshrah, Hossam A. H. Fahmy, and Mohamed El-Hadidy “Broadband High Efficiency Amplifier for a Cognitive Radio System,” Progress in Electromagnetics Research Symposium, 12-15 August 2013, Stockholm, Sweden.
57. K. Nassar, A. Safwat, Ali Darwish, S. ElQassas, O. Fahmy, “Designing a light redirecting system for southern skies,” Building Simulation 2013, Chambery, France, August 25-28, 2013.
58. A. M. Darwish; A. Bayba, H.A. Hung, “A Ring-HEMT for Improved GaN MMIC thermal dissipation,” IEEE International Microwave Symposium, Seattle, 2013.
59. Ahmed Kenawy, Ali Darwish, Esmat Talaat, Lina El Nadi, Mary Zekrie, Sally Mamdouh, and Sara Raouf, “Utilizing Mobile Technology for the less Privileged,” AUC research conference, April 16 – 19, AUC, New Cairo, Egypt, 2012.
60. Ahmed Khorshid, Ali Darwish, and Ahmed Rajaie, “Delivering Maximum Power From Microwave Transistors,” 29th National Radio Science Conference, April 10 – 12, Cairo, Egypt, 2012.
61. Ahmed Rajaie, Ahmed Khorshid, and Ali Darwish, “Recent Implementations of Class-E Power Amplifiers,” Japan-Egypt conference on electronics, communications, and computers, Alexandria, Egypt, 2012.
62. Thomas J. Farmer, Ali Darwish, Edward Viveiros, H. Alfred Hung, Mona E. Zaghlou, “94 GHz Power Amplifier Device Architecture in SiGe for Active Phase Arrays,” Antennas and Propagation Society International Symposium, Chicago, 2012.
63. Ali Darwish, J. Qiu, Edward A. Viveiros, and H.A. Hung “Improved Linearity of Power Amplifier GaN MMIC for 32 GHz for SATCOM band,” IEEE International Microwave Symposium, Montréal, 2012.
64. Ali Darwish, J. Qiu, Edward A. Viveiros, and H.A. Hung “Novel 4-Way Combiner for Ka-Band AlGaN/GaN Power MMIC,” IEEE International Microwave Symposium, Montréal, 2012.
65. B. Huebschman, Ali Darwish, “Identification of pre-Catastrophic Failure Mechanisms in High Power GaN HEMT,” IEEE Compound Semiconductor IC Symposium, Hawaii, 2011.
66. J. Qiu, Ali Darwish, E.A. Viverios and H.A. Hung “Linearity Characteristic Study of Millimeter-Wave GaN Power Amplifier,” IEEE International Microwave Symposium Baltimore, 2011.
67. A. Safwat, I. Eshra, T. Abou Alfadl, Ali Darwish, “Stub-Based Implementations of Composite Right/Left Handed Structures,” IEEE International Microwave Symposium Baltimore, 2011.
68. Thomas J. Farmer, Ali Darwish, Benjamin Huebschman, Edward Viveiros, H. Alfred Hung, Mona E. Zaghlou, “Class-A Stacked SiGe HBT Power Amplifier at Millimeter-Wave,” International Semiconductor Device Research Symposium (ISDRS) 2011, College Park, MD, USA.
69. M. A. Darwish, and Ali Darwish, “Fifty Years of MSF Desalination in Kuwait: Time to Change Directions,” ADST2010 Fifth International Conference: Desalination Technologies and Water Reuse, October 28-31, 2010, Alexandria University Conference Center, Alexandria, Egypt.
70. M. Fouad, M. Gobrial, S. Zachary, M. Michelle, J. Hanna, K. Nassar, Ali Darwish, “Non-Destructive measurement of particulate materials’ saturation with solvable liquids,” IEEE Middle East Conference on Antennas and Propagation 20-22 October 2010 in Cairo, Egypt.
71. N. Nakhla, A. Alaa El-deen, K. Maurice, L. Youssef, N. Mahfouz, T. Youakim, M. Abou Zeid, K. Nassar, Ali Darwish, “Electrostatics Utilization for Concrete Performance Measurements,” IEEE Middle East Conference on Antennas and Propagation 20-22 October 2010 in Cairo, Egypt.
72. Thomas J. Farmer, Ali Darwish, Benjamin Huebschman, Edward Viveiros, H. Alfred Hung, Mona E. Zaghlou, “Device Architecture for Millimeter-Wave Power Amplifiers using SiGe HBTs,” GOMAC 2011, Orlando, FL, USA.
73. Thomas J. Farmer, Ali Darwish, Benjamin Huebschman, Edward Viveiros, H. Alfred Hung, Mona E. Zaghlou, “SiGe HBT Power Amplifier at Millimeter-Wave,” GOMAC 2011, Orlando, FL, USA.
74. A. M. Darwish; Hung, H.A., “Thermal Challenges to Reliability of SiC MESFETs,” International Conference on High Performance Computing Systems, HPCS-10, Orlando, FL, July 12-14, 2010.
75. Ali Darwish, Khaled Nassar, Sarah Halawa, Tiya Youakim, Nardin Nakhla, Esraa Makled, “Water Conservation through a Recycling Sink,” International Conference for Engineering Solutions for Sustainable Development, Cairo, Egypt, April 2010.
76. Ali M. Darwish, H. Alfred Hung, “Dependence of FET/HEMT Reliability on Substrate Thickness and Gate Length,” IEEE European Microwave Integrated Circuits Conference, Paris, France, 2010.
77. Ali M. Darwish, H. Alfred Hung, Edward Viveiros, and Ming Y. Kao, “Multi-octave GaN MMIC Amplifier,” IEEE Int’l Microwave Symposium 2010, Anaheim, CA.
78. Benjamin D. Huebschman, Ali Darwish, Neil Goldsman, Edward A. Vivieros, Alfred Hung, “Investigation of breakdown behavior for AlGaN HEMTs,” Semiconductor Device Research Symposium, College Park, MD, 2009.
79. A.M. Darwish, M.A. Darwish, “Retrofitting the Gas Turbines in Kuwait Power Plants by Inlet Air Cooling using Chilled Water and Seawater Cooling,” Power Make Up Conference in Arab Countries (POMAC), Kuwait, Nov. 2009.
80. A. M. Darwish; Hung, H.A., “Thermal Challenges to Gate Length Reduction of FET,” IEEE International Conference on Microelectronics, Marrackech, Morocco, Dec. 19-22, 2009.
81. A. M. Darwish; Huebschman, B.; Viveiros, E., Alfred Hung, H., “The Dependence of GaN HEMT’s Frequency Figure of Merit on Temperature,” IEEE Int’l Microwave Symposium, June 2009, Boston, MA.
82. A. M. Darwish; Bayba, A.J.; Hung, H.A., “Closed Form Expression for Thermal Resistance of a Simple FET Structure,” IEEE Radar Conference, May 4-8, 2009, Pasadena, CA.
83. A. M. Darwish, A. Ezzeddine, “Three Dimensional Transmission Lines and Power Divider Circuits,” IEEE International Conference on Design and Technology of Integrated Systems in Nanoscale Era, Cairo, Egypt April 6 – 8, 2009.
84. Ali M. Darwish, A. Bayba, and H. A. Hung, “Utilizing Infrared for Improved Channel Temperature Prediction,” IEEE Int. Microwave Sym. 2008, Atlanta, GA, 2008.
85. M.A. Darwish, et al, “Altrnative Primary Energy for Power-Desalting Plants in Kuwait: the nuclear option I,” Alexandria Univ. Desalination Studies and Technology Center Conference 2008, May 7 – 8, Sharm-El-Sheikh, Egypt, 2008.
86. M. A. Darwish, Ali M. Darwish, “Sustainability of Energy and Water in Kuwait,” Environment 2007 Conference, Jan. 28 – Feb. 2, p. 58, Abu Dhabi, UAE, 2007.
87. M. A. Darwish, Ali M. Darwish, “Energy and Water in Kuwait: A Sustainability View Point, part I” Alexandria Univ. Desalination Studies and Technology Center Conference 2007, May 7 – 8, p. 58, Sharm-El-Sheikh, Egypt, 2007.
88. Ali M. Darwish, A. Bayba, and H. A. Hung, “FET Gate Length Impact on Reliability,” IEEE Int. Microwave Sym. 2007, WE1A-03, Honolulu, 2007.
89. M. A. Darwish, Ali M. Darwish, “Sustainability of Energy and Water in Kuwait,” Environment 2007 Conference, Jan. 28 – Feb. 2, p. 58, Abu Dhabi, UAE, 2007.
90. M. A. Darwish, Ali M. Darwish, “Energy and Water in Kuwait: A Sustainability View Point, part I” Alexandria Univ. Desalination Studies and Technology Center Conference 2007, May 7 – 8, p. 58, Sharm-El-Sheikh, Egypt, 2007.
91. M. A. Darwish, Ali M. Darwish, “Energy and Water in Kuwait: A Sustainability View Point, part II” Alexandria Univ. Desalination Studies and Technology Center Conference 2007, May 7 – 8, p. 58, Sharm-El-Sheikh, Egypt, 2007.
92. Ali M. Darwish, K. Boutros, B. Luo, B. Huebschman, E. Viveiros, and H. A. Hung, “4-Watt Ka-Band AlGaN/GaN Power Amplifier MMIC,” IEEE Int. Microwave Sym. 2006, WE3B-07, San Francisco, 2006.
93. Ali M. Darwish, T. Farmer, M. Zaghloul, E. Viverios, and H. A. Hung, “MEMS Control Circuit for Phased Array Antenna,” SPIE Defense & Security Symposium 2006, Kissimmee, FL.
94. P. B. Shah, B. Huebschman, Ali M. Darwish, N. Y. Mark, M. Derenge, K. A. Jones “Relation between passivation layer deposition conditions and AlGaN/GaN HFET performance,”, Materials Research Society Fall Conference, Boston, MA, 2005.
95. Ali M. Darwish, B. Huebschman, R. Del Rosario, E. Viverios, and H. A. Hung, “Temperature Behavior of AlGaN/GaN on SiC HEMTs,” IEEE Compound Semiconductor IC Symp. 2005, Palm Springs, CA, Oct. 31- Nov. 2, IFTH-55, 2005.
96. T. Farmer, M. Zaghloul, Ali Darwish, H. A. Hung, “CMOS Digital Control Circuit for MEMS Switch Based Phased Array Antenna,” MEMS RFIC and On-Chip Devices session, IEEE APS/URSI conference, Washington DC, July 5, 2005.
97. Ali M. Darwish, “Improving Wide Bandgap (GaN) Device Reliability,” Army Science Conference, Orlando, FL 2004.
98. Ali M. Darwish, A. Bayba, and H. A. Hung, “Thermal Resistance Calculation of AlGaN/GaN on SiC Devices,” IEEE Int. Microwave Sym. 2004, Fort Worth, TX, June 6-11, 2004.
99. Ali M. Darwish, A. Ezzeddine, M. Mah, J. cook, “Inexpensive X-band ½ Watt PA using 3D LTCC Technology,” IEEE Int. Microwave Sym. 2004, Fort Wroth, TX, June 6-11, 2004.
100. Ali M. Darwish, A. Bayba, and H. A. Hung, “Prediction of Submicron Junction Temperatures in Microelectronics Using IR Techniques,” SPIE Defense & Security Symposium 2004, Kissimmee, FL.
101. A. M. Darwish, Amin Ezzeddine, Ho C. Huang, Misoon Mah, Jim cook, K. Bumman, L. Joonyoul, Y. Sungwhan, ” Vertical Balun and Wilkinson Divider,” IEEE MTT-S International Symposium, TU2E-4, Seattle, 2002.
102. H. C. Huang, A. Ezzeddine, A. M. Darwish, Becker Hsu, Jim Williams, Steve Peak, “Ku-Band MMIC’s in Low-Cost, SMT Compatible Packages,” IEEE MTT-S International Symposium, TU2B-2, Seattle, 2002.
103. A. M. Darwish, A. Ezzeddine, H. C. Huang, and M. Mah, ” Three Dimensional Transmission Lines And Special Elements Design,” IEEE Midwest Symposium on Circuits and Systems, Dayton, 2001.
104. Y.-L.Lai, E.Y.Chang, A. Ezzeddine, A. M. Darwish, H.C.Huang, “Fully-Matched GaAs Power Amplifier MMICs for L-Band wireless communications,” International Symposium on Signals, Systems, and Electronics TH3-C5, Tokyo, 2001
105. A. M. Darwish, A. Ezzeddine, H. C. Huang, M. Mah, and J. Cook, “Three Dimensional Transmission Lines And Special Elements Design,” IEEE Asia Pacific Microwave Conference, Sydney, Australia, 2000.
106. A. M. Darwish, A. Ezzeddine, H. C. Huang, and M. Mah, “Three Dimensional Power Amplifier And Special Elements Design,” IEEE MTT-S International Symposium, THIF-33, Boston, 2000.
107. A. M. Darwish, A. Ezzeddine, H. C. Huang, and M. Mah, “Characteristic impedance, attenuation, and special elements in three-dimensional circuits,” GOMAC 2000, Anaheim, 2000.
108. A. M. Darwish, A. Ezzeddine, H. C. Huang, and M. Mah, “Effective Dielectric constant of the Embedded Transmission Line (ETL)-A Multilayer Stripline-like Structure,” IEEE MTT-S International Symposium, WEF1-2, Anaheim, 1999.
109. A. M. Darwish, H. C. Huang, A. Ezzeddine, and M. Mah, “Microwave Circuit with Gridded Ground Planes,” GOMAC ’99, Monterey, 1999.
110. H. Q. Le, J. P. Donnelley, S. H. Groves, E. A. Swanson, A. M. Darwish, G. Lenz, and E. P. Ippen, “Broad-band four-wave mixing in semiconductor waveguides,” CLEO 95, QThJ1, Baltimore, 1995.
111. A. M. Darwish, G. Lenz, E. P. Ippen, H. Q. Le, J. P. Donnelley, S. H. Groves and E. A. Swanson, “Frequency conversion in passive InGaAsP/InP waveguides,” CLEO 95, QThJ2, Baltimore, 1995.
112. J. P. Donnelley, H. Q. Le, E. A. Swanson, S. H. Groves, A. M. Darwish and E. P. Ippen, “Nondegenerate Four-Wave Mixing Wavelength Conversion in Low-Loss Passive InGaAsP/InP Waveguides,” LEOS 94, NO10.2, Boston, 1994.
113. K. L. Hall, A. M. Darwish, E. P. Ippen, U. Koren, and G. Raybon, “Femtosecond index nonlinearities in InGaAsP diode laser amplifiers,” CLEO ‘93, JThA2, Baltimore, 1993.
114. H. A. Hung, A. K. Ezzeddine, A. M. Darwish, G. Hegazi, S. B. Wernek, A. Goldman, “Monolithic integrated receiver technology for future satellite applications,” AIAA Int’l Communication Satellite System Conference, Washington DC, p.456-461, March 22-26, 1992.
115. A. M. Darwish, A. Ezzeddine, H. A. Hung, and F. R. Phelleps, “A new phase noise reduction technique for MMIC oscillators,” Microwave and Millimeter-Wave Monolithic Circuits Symposium, p. 171-4, Albuquerque, 1992.

Invited talks
116. Ali M. Darwish et al “Next Generation Radar,” IEEE Compound Semiconductor IC Symposium, Miami, FL, 2017.
117. Ali Darwish, “Designing the 2030 Radar,” IEEE IMS Workshop Presentation, Jun 2017.
118. Ali Darwish, “Innovative characterization of concrete mixtures using electrostatic fields,” International Conference on Materials Imperatives (MINM), Cairo, Egypt, Nov. 29 – Dec. 2, 2010.
119. Ali Darwish, “The future of non-destructive detection of water leaks,” Euro‐Mediterranean Innovation Marketplace, Cairo, January 26 – 28, 2010.
120. Ali Darwish, “Electrostatics for Construction Solutions,” Euro‐Mediterranean Innovation Marketplace, Cairo, January 26 – 28, 2010.
121. A. M. Darwish, “Design of Monolithic Microwave Integrated Circuits,” tutorial presented at 16th IEEE International Conference On Electronics, Circuits and Systems, Tunisia, December 2009.
122. A. M. Darwish, “Advanced Microwave Circuit Design,” tutorial presented at 21st IEEE International Conference on Microelectronics, Marrakech, Morocco, December 2009.

Filed/Granted Patents:
1. Ali Darwish, “Signal leveling using delay lines,” pending, 2020.
2. Ali Darwish, “method and system for linearizing an amplifier using transistor-level dynamic feedback,” 15/332,682, 2017.
3. A. Darwish, H. A. Hung, “Broadband High Power Microwave Combiner/Divider,” US 10079420B2, 2017.
4. A. Darwish, A. Hung, “High Frequency Multi-antennas transmitter,” US 10,069,669 2017.
5. Joe Qiu, Ali M. Darwish, H. Alfred Hung “Direct-Quadrature Transmitter for THz applications,” US 9,584,169, 2017.
6. Ali M. Darwish, H. Alfred Hung “Ring-Shaped Transistors Providing Reduced Self-Heating,” 8,816,397, August 2014.
7. Ali M. Darwish, H. Alfred Hung “Distributed Gate FET with Reduced Self Heating” 8,912,577, December, 2014.
8. Ali M. Darwish, H. Alfred Hung “Power Dividing and/or Power-Combining Circuits with Isolation,” US 9362602B2, 2014.
9. Ali M. Darwish, H. Alfred Hung “Power Dividing and/or Power Combining Circuits,” US 20140368297A1, 2013.
10. Ali M. Darwish, et al “Bipolar stacked transistor architecture,” US 2012/0242410 A1, 2012.
11. Ali M. Darwish, “Stability of High Frequency Circuits” filed Sept. 2011.
12. Ali M. Darwish, “Algorithm for Estimation of Thermal Resistance of Single-Layer Multi-Finger Field Electric Transistor (FET) Structures.” issued June 3, 2005, Appl. No. 11/143,678.

Honors and Awards

Outstanding Teaching Award, JHU (2020)

Professional Organizations

IEEE