Personal website

Dr. Khawaja Bilal Ahmed Mahmood

Associate Professor / ABET Coordinator, Electrical Engineering Department, Faculty of Engineering

Latest scientific research

Books / Books Chapters

[B1] Muhsin Ali and Bilal A. Khawaja, “Microstrip Patch Antenna Array For LTE AND MIMO Applications: Design, Simulation and Characterization Study of a Dual Band Antenna Array", 2014, Publisher: VDM-Verlag, ISBN: 978-3-8484-1418-5

[B2] Bilal A. Khawaja, “Millimetre-Wave Radio-Over-Fiber Systems Using Mode-Locked Lasers: Characterisation of Hybrid Mode-Locking, Phase Shifting, Photonic Active Integrated Antenna and Self-Oscillating Mixer", 2013, Publisher: VDM-Verlag, ISBN: 978-3-659-49359-1

[B3]Bilal A. Khawaja and C. D. Reeve, “Will All Communication Be Wireless Thus Investment In Fibre Optic Communication System Is A Waste of Time and Money?”, Advances in Networks, Computing and Communications Engineering-3, ISBN: 1-84102-140-7, pp. 129-137, Nov. 2005


Journal Papers

[J33] H. T. Chattha, M. K. Ishfaq, Bilal A. Khawaja, Abubakar Sharif; Nathirulla Sheriff, "Compact Multiport MIMO Antenna System for 5G IoT and Cellular Handheld Applications", IEEE Antennas and Wireless Propagation Letters, Vol. 1, pp. 1-1, 15 Feb. 2021, DOI: 10.1109/LAWP.2021.3059419

[J32] Arshad Karimbu Vallappil, Mohamad Kamal A Rahim, Bilal A. Khawaja, Noor Asniza Murad, Mohamed Musthapa Gajibo, "Butler Matrix Based Beamforming Networks for Phased Array Antenna Systems: A Comprehensive Review and Future Directions for 5G Applications", IEEE Access, Vol. 9, pp. 3970 - 3987, Dec. 2020, DOI: 10.1109/ACCESS.2020.3047696

[J31] Wajid Hussain, William G Spady, Muhammad Tayyab Naqash, Sohaib Zia Khan, Bilal A. Khawaja, Lindsey Conner, "ABET Accreditation During and After COVID19 - Navigating the Digital Age", IEEE Access, Vol. 8, pp. 218997 - 219046, Dec. 2020, DOI: 10.1109/ACCESS.2020.3041736

[J30] H. A. Wajid, H. T. Chattha, Bilal A. Khawaja, Saleh Al Ahmadi, "An automated continuous quality improvement framework for failing student outcomes based on mathematics weaknesses", The International Journal of Electrical Engineering & Education, Sep. 2020, DOI: 10.1177/0020720920956563

[J29] Sameer Qazi, Farah Sabir, Bilal A. Khawaja, Syed Muhammad Atif, and Muhammad Mustaqim, "Why is Internet of Autonomous Vehicles not as Plug and Play as We Think ? Lessons to Be Learnt From Present Internet and Future Directions", IEEE Access, Vol. 8, pp. 133015-133033, Jul. 2020, DOI: 10.1109/ACCESS.2020.3009336

[J28] Arshad K . V, Mohamad Kamal A. Rahim, Bilal A. Khawaja, and Murtala Aminu-Baba, "Metamaterial Based Compact Branch-Line Coupler with Enhanced Bandwidth for Use in 5G Applications", Applied Computational Electromagnetics Society Journal , Vol. 35, No. 6, pp. 700 - 708, Jun. 2020

[J27] Mohsin Jamil, Asim Waris, Syed Omer Gilani, Bilal A. Khawaja, Muhammad Nasir Khan, and Ali Raza, "Design of Robust Higher-Order Repetitive Controller Using Phase Lead Compensator", IEEE Access, Vol. 8, pp. 30603 - 30614, Feb. 2020, DOI: 10.1109/ACCESS.2020.2973168

[J26] Kinza Shafique, Bilal A. Khawaja, Farah Sabir, Sameer Qazi, and Muhammad Mustaqim, "Internet of Things (IoT) For Next-Generation Smart Systems: A Review of Current Challenges, Future Trends and Prospects for Emerging 5G-IoT Scenarios ", IEEE Access, Vol. 8, pp. 23022 - 23040, Feb. 2020, DOI: 10.1109/ACCESS.2020.2970118

[J25] Arshad K . V, Mohamad Kamal A. Rahim, Bilal A. Khawaja, and Muhammad Naeem Iqbal, "Compact Metamaterial Based 4×4 Butler Matrix With Improved Bandwidth for 5G Applications", IEEE Access, Vol. 8, pp. 13573 - 13583, Jan. 2020, DOI: 10.1109/ACCESS.2020.2966125

[J24] Muhammad K. Ishfaq, T. A. Rahman, M. Himdi, Hassan T. Chattha, Yasir Saleem, Bilal A. Khawaja, Farhan Masud, "Compact Four-Element Phased Antenna Array for 5G Applications", IEEE Access, Vol. 7, pp. 161103 - 161111, Oct. 2019, DOI: 10.1109/ACCESS.2019.2949149

[J23] Muhammad Uzair, Robert D. Dony, Mohsin Jamil, Bilal A. Khawaja and Muhammad Nasir Khan, "A no-reference framework for evaluating video quality streamed through wireless network", Turkish Journal of Electrical Engineering & Computer Sciences, Vol. 27, pp. 3383-3399, 18 Aug. 2019, DOI: 10.3906/elk-1811-173 (ISI Indexed - Impact Factor - 0.625)

[J22] Muhammad Naveed, Sameer Qazi, Syed Muhammad Atif, Bilal A. Khawaja and Muhammad Mustaqim, "SCRAS Server-Based Crosslayer Rate-Adaptive Video Streaming over 4G-LTE for UAV-Based Surveillance Applications", Electronics, Vol. 8, Iss. 8, , pp. 910, 18 Aug. 2019, DOI: https://doi.org/10.3390/electronics8080910 (ISI Indexed - Impact Factor - 1.764)

[J21] Muhammad Mustaqim, Bilal A. Khawaja, Hassan T. Chattha, Kinza Shafique, Muhammad J. Zafar and Mohsin Jamil, "Ultra Wideband Antenna for Wearable Internet of Things Devices and Wireless Body Area Network Applications", Wiley International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Vol. 32, Iss. 6, pp. 1-12, Nov-Dec 2019 DOI: https://doi.org/10.1002/jnm.2590 (ISI Indexed - Impact Factor - 0.816)

[J20] Qasim Awais, Yang Jin, Hassan T. Chattha, Mohsin Jamil, Qiang He and Bilal A. Khawaja, "A compact rectenna system with high conversion efficiency for wireless energy harvesting", IEEE Access, Vol. 6, Iss. 1, pp. 30932 - 30941, Jul. 2018, DOI: 10.1109/ACCESS.2018.2848907 (ISI Indexed - Impact Factor - 3.557)

[J19] Kinza Shafique, Bilal A. Khawaja, M. Daniyal Khurram, Syed Maaz Sibtain, Yazir Siddiqui, Muhammad Mustaqim, Hassan T. Chattha, and Xiaodong Yang, "Energy Harvesting Using A Low-Cost Rectenna for Internet of Things (IoT) Applications," IEEE Access, Vol. 6, Iss. 1, pp. 30932 - 30941, Jun. 2018, DOI: 10.1109/ACCESS.2018.2834392 (ISI Indexed - Impact Factor - 3.557)

[J18] Muhammad Nasir Khan, Syed O. Gilani , Mohsin Jamil, Abdul Rafay , Qasim Awais , Bilal A. Khawaja, Muhammad Uzair and Abdul Waheed Malik, "Maximizing Throughput of Hybrid FSO-RF Communication System: An Algorithm" IEEE Access, Vol. 6, pp. 30039 - 30048, May 2018, DOI: 10.1109/ACCESS.2018.2840535 (ISI Indexed - Impact Factor - 3.557)

[J17] Muhammad Mustaqim, Bilal A. Khawaja, Asghar A. Razzaqi, Syed Sajjad H. Zaidi, Syed A. Jawed and Sameer H. Qazi, "Wideband and High Gain Antenna Arrays for UAV-to-UAV and UAV-to-Ground Communication In Flying Ad-Hoc Networks (FANETs)", Wiley Microwave and Optical Technology Letters, Vol. 60, No. 5, pp. 1164-1170, May 2018 DOI: https://doi.org/10.1002/mop.31130 (ISI Indexed - Impact Factor - 0.948)

[J16] Arshad K . V, Bilal A. Khawaja, I. Khan and Muhammad Mustaqim, "Dual-Band Minkowski-Sierpinski Fractal Antenna For Next Generation Satellite Communications and Wireless Body Area Networks", Wiley Microwave and Optical Technology Letters, Vol. 60, No. 1, pp. 171-178, Jan. 2018 (ISI Indexed - Impact Factor - 0.948)

[J15] Kinza Shafique, Bilal A. Khawaja, Munir A. Tarar, Bilal M. Khan, M. Mustaqim and Ali Raza, “Wearable Ultra Wideband Antenna for Wireless Body Area Networks”, Wiley Microwave and Optical Technology Letters, Vol. 58, No. 7, pp. 1710-1715, Jul. 2016 (ISI Indexed - Impact Factor - 0.948)

[J14] Bilal Muhammad Khan, M. Mustaqim, Bilal A. Khawaja and S. Shabeeh Ul Husnain, “Spectrum Sensing in Satellite Cognitive Radios: Blind Signal Detection Technique”, Wiley Microwave and Optical Technology Letters, Vol. 58, No. 6, pp. 1377-1384, Jun. 2016 (ISI Indexed - Impact Factor - 0.948)

[J13] Bilal A. Khawaja, M. A. Tarar, T. Tauqeer, F. Amir and M. Mustaqim, "A 1x2 Triple Band Printed Antenna Array For Use In Next Generation Flying Ad-Hoc Networks (FANETs)", Wiley Microwave and Optical Technology Letters, Vol. 58, No. 3, pp. 606-610, Mar. 2016 (ISI Indexed - Impact Factor - 0.948)

[J12] A. A. Razzaqi, Bilal A. Khawaja, M. Ramzan, M. J. Zafar, S. A. Nasir, M. Mustaqim, M. A. Tarar and T. Tauqeer, "A Triple-Band Antenna Array for Next Generation Wireless and Satellite Based Applications", Cambridge International Journal of Microwave and Wireless Technologies, Volume 8, Issue 1, Pages 71-80, Feb. 2016(ISI Indexed - Impact Factor - 0.745) DOI:http://dx.doi.org/10.1017/S1759078714001275

[J11] Bilal A. Khawaja and Martin J. Cryan, “Characterization of A Photonic Active Integrated Antenna Using A Direct Off-Air Transmission Technique”, Springer Journal of Photonic Network Communications, Volume 28, Issue 3, Page 232-236, Jul. 2014 (ISI Indexed - Impact Factor - 1.203)

[J10] T. Tauqeer, M. U. Afzal, H. T. Butt, M. Islam, M. A. Tarar and Bilal A. Khawaja, “Analytical Comparison of Wideband Microstrip Log-Periodic and Co-Planar Waveguide Antennas”, Wileys Microwave and Optical Technology Letters, Vol. 56, No. 8, pp. 1854-1860, Aug. 2014(ISI Indexed - Impact Factor - 0.948)

[J9] Muhsin Ali, Bilal A. Khawaja, Muhammed Mustaqim and Munir A, Tarar, “U-Slot Microstrip Patch Antenna Array for Dual Band Operation In Next Generation Wireless Sensor Network”, International Journal of Sensor Networks (IJSNet), Inderscience Publishers, Vol. 14, No. 4, pp. 218-225, Dec. 2013(ISI Indexed - Impact Factor - 0.635)

[J8] Muhsin Ali, Bilal A. Khawaja, Munir A, Tarar and Muhammed Mustaqim, “A Dual Band U-Slot Printed Antenna Array for LTE and WiMAX Applications”, Wileys Microwave and Optical Technology Letters, Vol. 55, No. 12, pp. 2879-2883, Dec. 2013(ISI Indexed - Impact Factor - 0.948)

[J7] Bilal A. Khawaja and Martin J. Cryan, “Study of Link Gain and Locking Range In Hybrid Mode-Locked Laser Based Millimetre-Wave Radio-Over-Fibre System”, Wileys Microwave and Optical Technology Letters, Vol. 55, No. 10, pp. 2450-2454, Oct. 2013(ISI Indexed - Impact Factor - 0.948)

[J6] Bilal A. Khawaja and Martin J. Cryan, “Millimetre-Wave Photonic Active Integrated Antennas (PhAIAs) using Hybrid Mode-Locked Lasers”, Wileys Microwave and Optical Technology Letters, Vol. 54, No. 5, pp. 1200-1203, May 2012 (ISI Indexed - Impact Factor - 0.948)

[J5] Bilal A. Khawaja and Martin .J. Cryan, “Millimetre-Wave Radio-Over-Fibre Data Transmission Over Multimode Fibre”, Wileys Microwave and Optical Technology Letters, Vol. 53, No. 2, pp. 254-256, Feb. 2011 (ISI Indexed - Impact Factor - 0.948)

[J4] Bilal A. Khawaja and Martin J. Cryan, “A Millimetre Wave Self-Oscillating Mixer Using A Mode Locked Laser”, IEEE Transactions on Microwave Theory and Techniques and IEEE / OSA Journal of Lightwave Technology, Special Issue on Microwave Photonics, Vol. 58, No. 11, pp. 3352-3358, Nov. 2010 (ISI Indexed - Impact Factor - 3.176)

[J3] Bilal A. Khawaja and Martin J. Cryan, “Wireless Hybrid Mode Locked Lasers for Next Generation Radio-Over-Fiber Systems”, IEEE/OSA Journal of Lightwave Technology, special issue on very high throughput wireless over fibre technologies and applications, Vol. 28, No. 16, pp. 2268-2276, Aug. 2010 (ISI Indexed - Impact Factor - 3.652)

[J2] Bilal A. Khawaja and Martin .J. Cryan, “Study of Millimeter Wave Phase Shift in 40 GHz Hybrid Mode Locked Lasers”, IEEE Microwave and Wireless component Letters, vol. 19, no. 3, pp. 182-184, Mar. 2009 (ISI Indexed - Impact Factor - 2.169)

[J1] Bilal A. Khawaja and Martin .J. Cryan, “Characterisation of Multimode Fibres for Use in Millimetre Wave Radio-Over-Fibre Systems”, Wileys Microwave and Optical Technology Letters, Vol. 50, No. 8, pp. 2005 – 2007, Aug. 2008 (ISI Indexed - Impact Factor - 0.948)


Refereed International Conference Papers

[C19] Muhammad Naveed, Sameer Qazi, Bilal A. Khawaja and Muhammad Mustaqim, "Evaluation of video streaming capacity of UAVs with respect to channel variation in 4G-LTE Surveillance Architecture", IEEE International Conference on Information & Communication Technologies (ICICT 2019), 16 - 17 November 2019, Karachi, Pakistan

[C18] Shahab H. Khan, Liu Tong, Zhang Linbo, Asghar. A. Razzaqi and Bilal A. Khawaja, "Design of Flexible and Wearable Antenna for Wireless and Satellite Based IoT Applications", 2018 10th International Conference on Signal Processing Systems, November 16 – 18, 2018, Singapore

[C17] Kinza Shafique, Muhammad Mustaqim, Bilal M. Khan and Bilal A. Khawaja, "A Thin and Flexible Ultra Wideband Antenna for Wireless Body Area Networks with Reduced Ground Plane Effect", 2015 IEEE Conference on Emerging Technologies (ICET), December 19 – 20, 2015, Peshawar, Pakistan

[C16] Kinza Shafique, Asghar A. Razzaqi, Muhammad Mustaqim, Bilal M. Khan and Bilal A. Khawaja, "A 1x2 Circular Patch Antenna Array for Next Generation 802.11ac WLAN Applications", 2015 IEEE Conference on Emerging Technologies (ICET), December 19 – 20, 2015, Peshawar, Pakistan

[C15] Sameer Qazi, Arsalan Alvi, Adil Mazhar Qureshi, Bilal A. Khawaja and Muhammad Mustaqim, "An Architecture for Real Time Monitoring Aerial Adhoc Network", 13th IEEE International Conference on Frontiers of Information Technology (FIT'15), December 14-16, 2015, Islamabad Pakistan.

[C14] S. Shabeeh Ul Husnain, M. Mustaqim, B. M Khan and Bilal A. Khawaja, "SDR Design of Reconfigurable Transceiver for Rapid Implementation on DSP platform", International Multi Topic Conference 2015 (IMTIC '15), 11-13 Feb 2015, Mehran University, Jamshoro, Pakistan

[C13] Asghar A. Razzaqi, M. Mustaqim and Bilal A. Khawaja, “Antenna Array Design for Multi-UAVs Communication in Next Generation Flying Ad-Hoc Networks (FANETs)”, 11th International Conference on High-capacity Optical Networks and enabling / Emerging Technologies (HONET-PfE), 15-17 Dec 2014, UNC Charlotte, North Carolina, USA

[C12] Syeda Areeba Nasir, M. Mustaqim and Bilal A. Khawaja, “Antenna Array for 5th Generation 802.11ac Wi-Fi Applications”, 11th International Conference on High-capacity Optical Networks and enabling/Emerging Technologies (HONET-PfE), 15-17 Dec 2014, UNC Charlotte, North Carolina, USA

[C11] M. Javed Zafar, Asghar A. Razzaqi, M. Mustaqim and Bilal A. Khawaja, “UWB Wearable Antenna for Next Generation Wireless Body Area Networks (WBANs)”, 17th IEEE International Multi-Topic Conference (INMIC 2014), Bahria University, Karachi, 8 - 10th Dec 2014

[C10] Asghar A. Razzaqi, M. Mustaqim and Bilal A. Khawaja, “Wideband E-Shaped Antenna Design for WLAN Applications", IEEE International Conference on Emerging Technologies 2013 (ICET 2013), 9-10 Dec 2013, Islamabad, Pakistan

[C9] S. Areeba Nasir, S. Arif, M. Mustaqim and Bilal A. Khawaja, “A Log-Periodic Microstrip Patch Antenna Design For Dual Band Operation In Next Generation Wireless LAN Applications", IEEE International Conference on Emerging Technologies 2013 (ICET 2013), 9-10 Dec 2013, Islamabad, Pakistan

[C8] S. Arif, S. Areeba Nasir, M. Mustaqim and Bilal A. Khawaja, “Dual U-Slot Triple Band Microstrip Patch Antenna for Next Generation Wireless Networks", IEEE International Conference on Emerging Technologies 2013 (ICET 2013), 9-10 Dec 2013, Islamabad, Pakistan

[C7] Muhsin Ali and Bilal A. Khawaja, “Dual Band Microstrip Patch Antenna Array for Next Generation Wireless Sensor Network Applications,“ 2013 International Conference on Sensor Network Security Technology and Privacy Communication Systems (2013 SNS&PCS), Harbin, China, May 18-19, 2013.

[C6] Bilal A. Khawaja and Martin. J. Cryan, “A Wireless Hybrid Mode Locked Laser for Low Cost Millimetre Wave Radio-Over-Fiber Systems”, IEEE International Topical Meeting on Microwave Photonics (MWP), 14th -16th Oct 2009, Valencia, Spain

[C5] Bilal A. Khawaja and Martin. J. Cryan, “A Hybrid Mode Locked Laser As Millimetre Wave Modulated Data Source for Radio-Over-Fiber Systems”, IEEE Photonics Society Summer Topicals 2009, 20-22 July, 2009, Newport Beach, California, USA

[C4] Bilal A. Khawaja, I. Djordjevic, and Martin. J. Cryan, “A Millimeter Wave Phase Shifter Using A Wireless Hybrid Mode Locked Laser”, Optical Fiber Communication Conference (OFC 2009), 22 – 26 Mar, 2009, San Diego, California, USA, OSA Technical Digest (CD), paper OTuM5

[C3] Bilal A. Khawaja and Martin. J. Cryan, “A Millimetre Wave Phase Shifter Using a 40GHz Hybrid Mode Locked Laser”, IEEE International Conference on Emerging technologies (ICET 2008), Islamabad, Pakistan, Oct 2008

[C2] Bilal A. Khawaja and Martin .J. Cryan, “Characterisation of Millimetre Wave Multimode Radio-Over-Fibre Systems”, Conference on Lasers and Electro-optics (CLEO/QELS) , San Jose, USA, May 6 – 8, 2008

[C1] Bilal A. Khawaja and Martin. J. Cryan, “Characterisation of Multimode Fibres for Use in Millimetre Wave Radio-Over-Fibre Systems”, Asia Pacific Microwave Conference (APMC), Thailand, 11-14 December 2007


Tutorial / Workshop conducted at International Conferences

[TW1] Dr. Sohaib Z. Khan and Dr. Bilal A. Khawaja, Workshop session conducted on the topic of “Lasers: From basics to their applications in Nanotechnology and Optical Communication Systems” at 14th IEEE International Multi-topic Conference (INMIC 2011), Dec 22-24th 2011, Karachi, Pakistan. Web: http://www.inmic2011.org/TT31.html

Seminars, Symposium and Technical Presentations

[S1] Bilal A. Khawaja, “Next Generation Microwave Photonics and Radio-over-Fibre Systems and their Applications”, Talk given at International Symposium on "Emerging Technologies in Optical Communications and Semiconductor Devices, 25-26 August 2014. Venue: School of Electrical Engineering and Computer Science (SEECS), Sector H-12, National University of Sciences and Technology (NUST), Islamabad, Pakistan

Web: http://seecs.nust.edu.pk/Seminars_workshops/pages/International-Symposium-on-Emerging-Technologies-in-Optical-Communications-and-Semiconductor-Devices/index.php

[S2] Bilal A. Khawaja and Muhammed Mustaqim, “Next Generation Software Define Radios (SDRs)”, Seminar given at NED University, Karachi, 27th Mar 2014

[S3] Bilal A. Khawaja and Martin. J. Cryan, “Millimetre Wave over Fibre Systems for Next Generation WLAN”, Institute of Engineering and Technology (IET) UK seminar given at Centre for Communications Research, Department of Electrical and Electronic Engineering, University of Bristol, UK, 5th Nov 2009

[S4] Bilal A. Khawaja and Martin. J. Cryan, “Millimetre Wave over Fibre Systems for Next Generation WLAN”, Centre for Communications Research lunch time seminar at Department of Electrical and Electronic Engineering, University of Bristol, UK, Nov 2009

[S5] Bilal A. Khawaja and Martin. J. Cryan, ‘Millimetre Wave Phase Shifters Using 40GHz Mode-Locked Lasers, Postgraduate Research Reception and Conference, Centre for Communications Research, University of Bristol, UK, Jun 2008


Conference Attended

[CA1] Bilal A. Khawaja, Attended the 5th European Workshop on Conformal Antennas held at Centre for Communications Research, University of Bristol, Bristol, UK, 10-11th September 2007