Publications
Journals Publications
[J9] A. Karakuzulu, W. A. Ahmad, D. Kissinger and A. Malignaggi, "A Four-Channel Bidirectional D-Band Phased-Array Transceiver for 200 Gb/s 6G Wireless Communications in a 130-nm BiCMOS Technology," in IEEE Journal of Solid-State Circuits, vol. 58, no. 5, pp. 1310-1322, May 2023, doi: 10.1109/JSSC.2022.3232948.
[J8] R. Hasan, M. H. Eissa, W. A. Ahmad, H. J. Ng and D. Kissinger, "Wideband and Efficient 256-GHz Subharmonic- Based FMCW Radar Transceiver in 130-nm SiGe BiCMOS Technology," in IEEE Transactions on Microwave Theory and Techniques, vol. 71, no. 1, pp. 59-70, Jan. 2023, doi: 10.1109/TMTT.2022.3207995.
[J7] W. A. Ahmad and X. Yi, "How Will Radar Be Integrated Into Daily Life?: mm-Wave Radar Architectures for Modern Daily Life Applications," in IEEE Microwave Magazine, vol. 23, no. 5, pp. 30-43, May 2022, doi: 10.1109/MMM.2022.3148343.
[J6] M. Kucharski, W. A. Ahmad, H. J. Ng and D. Kissinger, "Monostatic and Bistatic G-Band BiCMOS Radar Transceivers With On-Chip Antennas and Tunable TX-to-RX Leakage Cancellation," in IEEE Journal of Solid-State Circuits, vol. 56, no. 3, pp. 899-913, March 2021, doi: 10.1109/JSSC.2020.3041045.
[J5] W. A. Ahmad et al., "Multimode W-Band and D-Band MIMO Scalable Radar Platform," in IEEE Transactions on Microwave Theory and Techniques, vol. 69, no. 1, pp. 1036-1047, Jan. 2021, doi: 10.1109/TMTT.2020.3038532.
[J4] S. H. Abouzaid, W. A. Ahmad, T. F. Eibert, and H. J. Ng, "Vital signs monitoring using pseudo-random noise coded Doppler radar with Delta–Sigma modulation," in IET Radar, Sonar & Navigation, Aug, 2020.
[M1] W. A. Ahmad, M. Kucharski, A. Ergintav, H. J. Ng and D. Kissinger, "A Planar Differential Wide Fan-Beam Antenna Array Architecture: Modular High-Gain Array for 79-GHz Multiple-Input, Multiple-Output Radar Applications," in IEEE Antennas and Propagation Magazine, vol. 63, no. 4, pp. 21-32, Aug. 2021, doi: 10.1109/MAP.2020.2976913.doi: 10.1109/MAP.2020.2976913.
[L1] W. A. Ahmad, M. Kuchariski, A. Di Serio, H. J. Ng, C. Waldschmidt and D. Kissinger, "Planar Highly Efficient High-Gain 165-GHz On-Chip Antennas for Integrated Radar Sensors," in IEEE Antennas and Wireless Propagation Letters, vol. 18, no. 11, pp. 2429-2433, Nov. 2019, doi: 10.1109/LAWP.2019.2940110.
[J3] M. Kucharski, A. Ergintav, W. A. Ahmad, M. Krstić, H. J. Ng and D. Kissinger, "A Scalable 79-GHz Radar Platform Based on Single-Channel Transceivers," in IEEE Transactions on Microwave Theory and Techniques, vol. 67, no. 9, pp. 3882-3896, Sept. 2019.
[J2] R. Hasan, W. A. Ahmad, J. Lu, H. J. Ng and D. Kissinger, "F-Band Differential Microstrip Patch Antenna Array and Waveguide to Differential Microstrip Line Transition for FMCW Radar Sensor," in IEEE Sensors Journal, vol. 19, no. 15, pp. 6486-6496, 1 Aug.1, 2019.
[J1] H. J. Ng, M. Kucharski, W. Ahmad and D. Kissinger, "Multi-Purpose Fully Differential 61- and 122-GHz Radar Transceivers for Scalable MIMO Sensor Platforms," in IEEE Journal of Solid-State Circuits, vol. 52, no. 9, pp. 2242-2255, Sept. 2017.
Conferences Publications
[C24] W. A. Ahmad, M. Kucharski, H. J. Ng and D. Kissinger, "D-Band FMCW Radar with sub-cm Range Resolution based on a BiCMOS mm Wave IC," 2021 18th European Radar Conference (EuRAD), 2022, pp. 533-536, doi: 10.23919/EuRAD50154.2022.9784503.
[C23] W. A. Ahmad, M. Kucharski, H. J. Ng and D. Kissinger, "BiCMOS IQ Transceiver with Array-on-Chip for D-Band Joint Radar-Communication Applications," 2022 IEEE 22nd Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF), 2022, pp. 78-80, doi: 10.1109/SiRF53094.2022.9720042.
[C22] W. A. Ahmad, J. -H. Lu, B. Sutbas, H. J. Ng and D. Kissinger, "Contactless Vital Signs Monitoring by mmWave Efficient Modulatorless Tracking Radar," 2021 IEEE Global Conference on Artificial Intelligence and Internet of Things (GCAIoT), 2021, pp. 142-146, doi: 10.1109/GCAIoT53516.2021.9691509.
[C21] W. A. Ahmad, S. Schmitz, H. J. Ng and D. Kissinger, "A D-Band Stacked Patch Antenna with Air Trenches in BiCMOS Technology," 2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI), 2021, pp. 1637-1638, doi: 10.1109/APS/URSI47566.2021.9704653.
[C20] W. A. Ahmad, A. Ergintav, J. Wessel, D. Kissinger and H. J. Ng, "Experimental Evaluation of Millimeter-Wave FMCW Radar Ranging Precision," 2021 IEEE Radio and Wireless Symposium (RWS), San Diego, CA, USA, 2021, pp. 70-72.
[C19] W. A. Ahmad, J. Wessel, H. J. Ng and D. Kissinger, "IoT-Ready Millimeter-Wave Radar Sensors," 2020 IEEE Global Conference on Artificial Intelligence and Internet of Things (GCAIoT), Dubai, United Arab Emirates, 2020, pp. 1-5.
[C18] A. Ali, W. A. Ahmad, H. J. Ng, D. Kissinger, F. Giannini and P. Colantonio, "Wideband 4-Way Combined Power Amplifier in BiCMOS Technology for D-Band Applications," 2020 IEEE Asia-Pacific Microwave Conference (APMC), Hong Kong, Hong Kong, 2020, pp. 107-109.
[C17] W. A. Ahmad, A. Ergintav, M. Kucharski, D. Kissinger, H. J. Ng, "Scalable 2×2 MIMO Radar with BPSK Data Communication at 79 GHz," 2020 17th European Radar Conference (EuRAD), 2021, pp. 234-237, doi: 10.1109/EuRAD48048.2021.00067.
[C16] W. Ahmad, H. J. Ng, C. Waldschmidt and D. Kissinger, "Micromachined 160 GHz endfire antenna in 130-nm BiCMOS technology for radar application" in Proc. IEEE Int. Symp. Antennas Propag., Montreal, Canada, Jul. 2020.
[C15] W. Lin, R. W. Ziolkowski, Y. Yang, W. A. Ahmad, L. Yuan, H. J. Ng, Y. Wang and D. Kissinger, "320 GHz on-chip circularly-polarized antenna array realized with 0.13 µm BiCMOS technology" in Proc. IEEE Int. Symp. Antennas Propag., Montreal, Canada, Jul. 2020.
[C14] W. A. Ahmad, M. Kucharski, A. Ergintav, D. Kissinger and H. J. Ng, "Modular Scalable 80- and 160-GHz Radar Sensor Platform for Multiple Radar Techniques and Applications," 2020 IEEE/MTT-S International Microwave Symposium (IMS), Los Angeles, CA, USA, 2020, pp. 1275-1278, doi: 10.1109/IMS30576.2020.9223918.
[C13] W. A. Ahmad, D. Kissinger and H. J. Ng, "Millimeter-Wave Single-Layer Full-Band WR12 Vertical Waveguide Transition," 2020 IEEE Radio and Wireless Symposium (RWS), San Antonio, TX, USA, 2020, pp. 298-301, doi: 10.1109/RWS45077.2020.9050127.
[C12] W. A. Ahmad, T. Inoue, D. Kissinger, Herman Jalli Ng, “Planar Millimeter-Wave Waveguide Transition for Material Characterization at 79 GHz,” 2019 49th European Microwave Conference (EuMC), Paris, France, 2019.
[C11] W. Ahmad, M. Kucharski, H. Ng and D. Kissinger, “A Compact Efficient D-Band Micromachined On-Chip Differential Patch Antenna for Radar Applications,” 2019 IEEE International Symposium on Antennas and Propagation (APSURSI), Atlanta, GA, USA, 2019, pp. 2201-2202, doi: 10.1109/APUSNCURSINRSM.2019.8889358.
[C10] W. A. Ahmad, H. J. Ng and D. Kissinger, "Design of Planar Waveguide Transition and Antenna Array utilizing Low-Loss Substrate for 79 GHz Radar Applications," 2019 IEEE Radio and Wireless Symposium (RWS), Orlando, FL, USA, 2019, pp. 1-3.
[C9] W. A. Ahmad, D. Kissinger and H. J. Ng, "An On-Board Differential Patch Array for 79 GHz Single-Channel Radar Applications," 2018 15th European Radar Conference (EuRAD), Madrid, Spain, 2018, pp. 365-368.
[C8] R. Hasan, W. A. Ahmad, J. Lu, D. Kissinger and H. J. Ng, "Design and characterization of a differential microstrip patch antenna array at 122 GHz," 2018 IEEE Radio and Wireless Symposium (RWS), Anaheim, CA, 2018, pp. 28-30.
[C7] W. A. Ahmad, D. Kissinger and H. J. Ng, "Experimental evaluation of 61 GHz differential compensated chip-on-board interconnect for FMCW radar," 2018 IEEE Radio and Wireless Symposium (RWS), Anaheim, CA, 2018, pp. 274-276, doi: 10.1109/RWS.2018.8305008.
[C6] W. A. Ahmad, J. Lu, D. Kissinger and H. Jalli Ng, "Beam squinting in wideband 60 GHz on-board series-fed differential patch arrays," 2017 IEEE Asia Pacific Microwave Conference (APMC), Kuala Lumpar, 2017, pp. 13-16.
[C5] H. J. Ng, W. Ahmad and D. Kissinger, "Scalable MIMO radar utilizing delta-sigma modulation-based frequency-division multiplexing technique," 2017 European Radar Conference (EURAD), Nuremberg, 2017, pp. 118-121.
[C4] W. A. Ahmad, J. Lu, R. Hasan, D. Kissinger and H. J. Ng, "Design and characterization of series and corporate feed differential arrays for broadband 60 GHz radar applications," 2017 47th European Microwave Conference (EuMC), Nuremberg, 2017, pp. 244-247.
[C3] H. J. Ng, M. Kucharski, W. Ahmad and D. Kissinger, "Scalable pseudo-random noise radar," 2017 18th International Radar Symposium (IRS), Prague, 2017, pp. 1-9.
[C2] H. J. Ng, W. Ahmad, M. Kucharski, J. H. Lu and D. Kissinger, "Highly-miniaturized 2-channel mm-wave radar sensor with on-chip folded dipole antennas," 2017 IEEE Radio Frequency Integrated Circuits Symposium (RFIC), Honolulu, HI, USA, 2017, pp. 368-371.
[C1] W. Abdullah and E. Hegazi, "Dynamic Supply RF Power Amplifier," 2013 30th National Radio Science Conference (NRSC), Cairo, Egypt, 2013, pp. 458-465.
White Papers
[W1] April 15th, 2013: MOSTEC Devices Fabrication. A paper that shows a brief description of the IC Fabrication Grant provided by TIEC. The fabrication process is described from very beginning till the chip testing.