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Number of items: 110.

Abduljabar, Ali A., Clark, Nicholas, Lees, Jonathan and Porch, Adrian 2017. Dual Mode Microwave Microfluidic Sensor for Temperature Variant Liquid Characterization. IEEE Transactions on Microwave Theory and Techniques 65 (7) , pp. 2572-2582. 10.1109/TMTT.2016.2647249
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Alt, Alexander and Lees, Jonathan 2017. Improving efficiency, linearity and linearisability of an asymmetric doherty power amplifier by modulating the peaking amplifier’s supply voltage. Presented at: 20th EuMW 2017, Nuremberg, Germany, 8-13 October 2017.
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Yusoff, Zubaida, Annuar, Fatahiyah Mohd, Kung, Fabian, Hashim, Shaiful Jahari, Lees, Jonathan and Cripps, Stephen Charles 2016. The effect of tracking generator efficiency to overall RF power amplifier system efficiency. Presented at: 2016 IEEE International Conference on Semiconductor Electronics (ICSE), 17-19 August 2016. Semiconductor Electronics (ICSE), 2016 IEEE International Conference on. IEEE, pp. 344-347. 10.1109/SMELEC.2016.7573662

Williams, Catrin F., Geroni, Gilles M., Pirog, Antoine, Lloyd, David, Lees, Jonathan and Porch, Adrian 2016. The separated electric and magnetic field responses of luminescent bacteria exposed to pulsed microwave irradiation. Applied Physics Letters 109 (9) , 093701. 10.1063/1.4961970
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Williams, Catrin Ffion, Lloyd, David, Lees, Jonathan, Pirog, Antoine, Geroni, Gilles M., Pastre, Jordan, Kriegel, Valentin and Porch, Adrian 2016. What the deep sea can tell us about microwaves. Presented at: International Microwave Symposium IMS, San Francisco, California, 22-27 May 2016. Microwave Symposium (IMS), 2016 IEEE MTT-S International. IEEE, 10.1109/MWSYM.2016.7540432

Chaudhary, Muhammad Akmal, Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2016. Modulated waveform measurement and engineering system. Presented at: 2015 2nd International Conference on Electronics and Communication Systems (ICECS), Cairo, Egypt, 6-9 December 2015. 2015 IEEE International Conference on Electronics, Circuits, and Systems (ICECS 2015). Institute of Electrical and Electronics Engineers (IEEE), pp. 252-255. 10.1109/ICECS.2015.7440296

Yusoff, Zubaida, Lees, Jonathan, Chaudhary, Muhammad Akmal and Cripps, Steve C. 2016. Ferrite toroidal core with a trifilar wound RF broadband transformer design for tracking generators in wideband code division multiple access envelope tracking RFPA systems. Journal of Electromagnetic Waves and Applications 30 (5) , pp. 599-611. 10.1080/09205071.2016.1138899

Chaudhary, Muhammad Akmal, Memon, Zulifqar Ali, Yusoff, Zubaida, Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2016. Characterization of baseband electrical memory in microwave devices using multi-tone measurement system. Presented at: 2016 16th Mediterranean Microwave Symposium (MMS), 14-16 November 2016. Microwave Symposium (MMS), 2016 16th Mediterranean. p. 1. 10.1109/MMS.2016.7803811

Dong, Shi-Wei, Tasker, Paul J., Wang, Guofeng and Lees, Jonathan 2016. A practicable de-embedding network at higher frequency of a packaged GaN device. Presented at: 2016 IEEE MTT-S International Wireless Symposium (IWS), 14-16 March 2016. Wireless Symposium (IWS), 2016 IEEE MTT-S International. IEEE, p. 1. 10.1109/IEEE-IWS.2016.7585473

Brazzini, Tommaso, Casbon, Michael A., Sun, Huarui, Uren, Michael J., Lees, Jonathan, Tasker, Paul J., Jung, Helmut, Blanck, Herve and Kuball, Martin 2015. Study of hot electrons in AlGaN/GaN HEMTs under RF Class B and Class J operation using electroluminescence. Microelectronics Reliability 55 (12) , pp. 2493-2498. 10.1016/j.microrel.2015.09.023
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Imtiaz, Azeem, Lees, Jonathan, Choi, Heungjae and Joshi, Lovleen Tina 2015. An integrated continuous class-F-1 mode power amplifier design approach for microwave enhanced portable diagnostic applications. IEEE Transactions on Microwave Theory and Techniques 63 (10) , pp. 3007-3015. 10.1109/TMTT.2015.2472417
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Brazzini, Tommaso, Casbon, Michael A., Sun, Huarui, Uren, Michael J., Lees, Jonathan, Tasker, Paul J., Jung, Helmut, Blanck, Herve and Kuball, Martin 2015. Electroluminescence of hot electrons in AlGaN/GaN high-electron-mobility transistors under radio frequency operation. Applied Physics Letters 106 (21) , 213502. 10.1063/1.4921848

Mokhti, Z. A., Lees, Jonathan, Tasker, Paul J. and Cassan, C. 2015. Investigating the linearity versus efficiency trade-off of different power amplifier modes in an envelope tracking architecture. 2015 10th European microwave integrated circuits conference (eumic) , pp. 357-360. 10.1109/EuMIC.2015.7345143

Imtiaz, Azeem, Hartley, Jon, Choi, Heungjae and Lees, Jonathan 2015. A high power high efficiency integrated solid-state microwave heating structure for portable diagnostic healthcare applications. Presented at: IEEE MTT-S 2014 IEEE International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications, London, 8-10 December 2014. 2014 IEEE MTT-S international microwave workshop series on RF and wireless technologies for biomedical and healthcare applications (IMWS-Bio). IEEE, pp. 1-3. 10.1109/IMWS-BIO.2014.7032437

Hartley, Jon, Lees, Jonathan, Cuenca, Jerome and Choi, Heungjae 2014. Assessment of machine oil quality by microwave cavity perturbation method. Presented at: 2014 International Symposium on Information Technology Convergence (ISITC 2014), Jeonju, Republic of Korea, 30-31 October 2014.

A Mokhti, Zulhazmi Bin, Tasker, Paul J. and Lees, Jonathan 2014. Correlation analysis between a VNA-based passive load pull system and an oscilloscope-based active load pull system: a case study. Presented at: 83rd ARFTG Microwave Measurement Conference 2014, Tampa, USA, 6 June 2014. 83rd ARFTG Microwave Measurement Conference (ARFTG), 2014. pp. 1-4. 10.1109/ARFTG.2014.6899535

Ogboi, Friday Lawrence, Tasker, Paul J., Akmal, Muhammad, Lees, Jonathan, Benedikt, Johannes, Bensmida, S., Morris, K., Beach, M. and McGeehan, J. 2014. Investigation of various envelope complexity linearity under modulated stimulus using a new envelope formulation approach. Presented at: 83rd ARFTG Microwave Measurement Conference 2014, Tampa, USA, 1 - 6 June 2014. Compound Semiconductor Integrated Circuit Symposium (CSICs), 2014 IEEE. IEEE, pp. 1-4. 10.1109/CSICS.2014.6978563

Yang, F., Lees, Jonathan, Choi, Heungjae, Yu, H. and Tasker, Paul J. 2014. Continuous class BJ power amplifier with DGS output matching. Presented at: 83rd ARFTG Microwave Measurement Conference 2014, Tampa, USA, 6 June 2014. Microwave Symposium (IMS), 2014 IEEE MTT-S International. IEEE, pp. 1-4. 10.1109/MWSYM.2014.6848562

A Mokhti, Zulhazmi Bin, Tasker, Paul J. and Lees, Jonathan 2014. Using waveform engineering to optimize class-F power amplifier performance in an envelope tracking architecture. Presented at: 44th European Microwave Conference (EuMC) 2014, Rome, Italy, 6-9 October 2014. 44th European Microwave Conference (EuMC 2014). IEEE, pp. 1301-1304. 10.1109/EuMC.2014.6986682

Aldoumani, Anoor, Williams, Tudor, Lees, Jonathan and Tasker, Paul J. 2014. Enhanced vector calibration of load-pull measurement systems. Presented at: 83rd ARFTG Microwave Measurement Conference 2014, Tampa, FL, USA, 6 June 2014. ARFTG Microwave Measurement Conference (ARFTG), 2014 83rd. IEEE, pp. 1-4. 10.1109/ARFTG.2014.6899508

Ogboi, Friday Lawrence, Tasker, Paul J., Akmal, M., Lees, Jonathan, Benedikt, Johannes, Bensmida, S., Morris, K., Beach, M. and McGeehan, J. 2014. High bandwidth investigations of a baseband linearization approach formulated in the envelope domain under modulated stimulus. Presented at: European Microwave Conference (EuMC) 2014, Rome, Italy, 6-9 October 2014. European Microwave Conference (EuMC). IEEE, pp. 1305-1308. 10.1109/EuMC.2014.6986683

Mokhti, Z. A., Tasker, Paul J. and Lees, Jonathan 2014. Using waveform engineering to optimize Class-F power amplifier performance in an envelope tracking architecture. Presented at: 9th European Microwave Integrated Circuit Conference (EuMIC), Rome, Italy, 6-7 Octpber 2014. European Microwave Integrated Circuit Conference (EuMIC), 2014 9th. IEEE, pp. 357-360. 10.1109/EuMIC.2014.6997866

Mokhti, Z. A., Tasker, Paul J. and Lees, Jonathan 2014. Analyzing the improvement in efficiency through the integration of class-F power amplifiers compared to class-AB in an envelope tracking architecture. Presented at: 26th International Teletraffic Congress (ITC), Karlskrona, Sweden, 9-11 September 2014. Teletraffic Congress (ITC), 2014 26th International. pp. 1-4. 10.1109/ITC.2014.6932967

Ogboi, Friday Lawrence, Tasker, Paul J., Mohkti, Z., Lees, Jonathan, Benedikt, Johannes, Bensmida, S., Morris, K., Beach, M. and McGeehan, J. 2014. Sensitivity of AM/AM linearizer to AM/PM distortion in devices. Presented at: 83rd ARFTG Microwave Measurement Conference 2014, Tampa, FL, USA, 6 June 2014. ARFTG Microwave Measurement Conference (ARFTG), 2014 83rd. IEEE, pp. 1-4. 10.1109/ARFTG.2014.6899507

Koh, M., Bell, James Joseph, Williams, D., Patterson, A., Lees, Jonathan, Root, D. E. and Tasker, Paul J. 2014. Frequency scalable large signal transistor behavioral model based on admittance domain formulation. Presented at: International Microwave Symposium, Tampa, Florida, 1-6 June 2014. 2014 IEEE MTT-S International Microwave Symposium (IMS). Picastaway, NJ: IEEE, pp. 1-3. 10.1109/MWSYM.2014.6848287

Kural, Aleksander, Pullin, Rhys, Holford, Karen Margaret, Lees, Jonathan, Naylon, Alexander Jack, Paget, Christophe and Featherston, Carol Ann 2013. Design and characterization of an ultrasonic lamb-wave power delivery system. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 60 (6) , pp. 1134-1140. 10.1109/TUFFC.2013.2676

Morgan, Alex John, Naylon, Alexander Jack, Gooding, Sarah Victoria, John, Christopher David, Squires, Oliver Leslie, Lees, Jonathan, Barrow, David Anthony and Porch, Adrian 2013. Efficient microwave heating of microfluidic systems. Sensors and Actuators B: Chemical 181 , pp. 904-909. 10.1016/j.snb.2013.02.099

Schmid, Ulrich, Thangaraj, K., Elefsiniotis, A., Aslam, S., Becker, Th., Schmid, U., Lees, Jonathan, Featherston, Carol Ann, Pullin, Rhys, Sánchez de Rojas Aldavero, José Luis and Leester-Schaedel, Monika 2013. Hybrid energy storage system for wireless sensor node powered by aircraft specific thermoelectric energy harvesting. Presented at: Smart Sensors, Actuators, and MEMS VI, Grenoble, France, 24 April 2013. Proc. SPIE 8763, Smart Sensors, Actuators, and MEMS VI. SPIE, p. 876307. 10.1117/12.2017691

Ogboi, Friday Lawrence, Tasker, Paul J., Akmal, Muhammad, Lees, Jonathan, Benedikt, Johannes, Bensmida, S., Morris, K., Beach, M. and McGeehan, J. 2013. A LSNA configured to perform baseband engineering for device linearity investigations under modulated excitations. Presented at: 43rd European Microwave Conference, Nuremberg, Germany, 7-10 October 2013. Proceedings of the 43rd European Microwave Conference. pp. 684-687.

Chaudhary, M. A, Memon, Z. A., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2013. Investigation of baseband electrical memory effects on the dynamic characteristics of power transistors. Presented at: 2013 16th International Multi Topic Conference (INMIC), Lahore, Pakistan, 19-20 December 2013. Multi Topic Conference (INMIC), 2013 16th International. IEEE, pp. 106-109. 10.1109/INMIC.2013.6731333

Chaudhary, Muhammad Akmal, Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2013. Reduction of baseband electrical memory effects using broadband active baseband load-pull. Presented at: 2013 IEEE International Wireless Symposium (IWS), Beijing, China, 14-18 April 2013. Wireless Symposium (IWS), 2013 IEEE International. IEEE, pp. 1-4. 10.1109/IEEE-IWS.2013.6616709

Hone, Thomas M., Bensmida, Souheil, Morris, Kevin A., Beach, Mark A., McGeehan, Joe P., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2013. Inverse active load-pull in an inverse Doherty amplifier. Presented at: 2013 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications, Santa Clara, CA, USA, 20 Jauary 2013. Power Amplifiers for Wireless and Radio Applications (PAWR), 2013 IEEE Topical Conference on. IEEE, pp. 4-6. 10.1109/PAWR.2013.6490170

Featherston, Carol, Holford, Karen Margaret, Pullin, Rhys, Lees, Jonathan, Eaton, Mark Jonathan and Pearson, Matthew R. 2013. An autonomous structural health monitoring solution. Presented at: Microtechnologies 2013, Grenoble, France, 24-26 April 2013. Proc. SPIE 8763, Smart Sensors, Actuators, and MEMS VI. Society of Photo-Optical Instrumentation Engineers (SPIE), p. 876302. 10.1117/12.2018401

Yusoff, Zubaida, Lees, Jonathan, Chaudhary, Muhammad Akmal, Carrubba, Vincenzo, Choi, Heungjae, Tasker, Paul J. and Cripps, Stephen Charles 2013. Simple and low-cost tracking generator design in envelope tracking radio frequency power amplifier system for WCDMA applications. IET Microwaves, Antennas & Propagation 7 (10) , pp. 802-808. 10.1049/iet-map.2013.0091

Thangaraj, Karthik, Elefsiniots, A., Becker, Th., Schmid, U., Lees, Jonathan, Featherston, Carol Ann and Pullin, Rhys 2013. Energy storage options for wireless sensors powered by aircraft specific thermoelectric energy harvester. Microsystem Technologies 20 (4-5) , pp. 701-707. 10.1007/s00542-013-2009-3

Koh, M., Bell, James J., Williams, D., Patterson, A., Wohlmuth, W., Lees, Jonathan and Tasker, Paul J. 2013. X-band MMIC scalable large signal model based on unit cell behavioral data model and passive embedding network. Presented at: International Microwave Symposium, Seattle, WA, 2-7 June 2013. 2013 IEEE MTT-S International Microwave Symposium Digest (IMS). Picastaway, NJ: IEEE, pp. 1-4. 10.1109/MWSYM.2013.6697424

Aldoumani, Anoor, Tasker, Paul J., Saini, R. S., Bell, James J., Williams, T. and Lees, Jonathan 2013. Operation and calibration of VNA-based large signal RF I-V waveform measurements system without using a harmonic phase reference standard. Presented at: ARFTG Microwave Measurement Conference (ARFTG), Seattle, WA, 7-7 June 2013. 2013 81st ARFTG Microwave Measurement Conference (ARFTG). Picastaway, NJ: IEEE, pp. 1-4. 10.1109/ARFTG.2013.6579055

Pearson, Matthew, Lees, Jonathan, Featherston, Carol and Pullin, Rhys 2013. 9th international conference on advances in experimental mechanics. Presented at: 9th International Conference on Advances in Experimental Mechanics, Cardiff, Wales, 3 - 5 September 2013.

Bensmida, Souheil, Morris, Kevin A., Beach, Mark, McGeehan, Joe P., Lees, Jonathan, Choi, Heungjae, Akmal, Muhammad, Benedikt, Johannes and Tasker, Paul J. 2012. Nonlinear envelope tracking for efficiency optimization of power amplifiers. Presented at: 7th European Microwave Integrated Circuits Conference (EuMIC) 2012, Amsterdam, The Netherlands, 29-30 October 2012. 7th European Microwave Integrated Circuits Conference (EuMIC), 2012. Picastaway, NJ: IEEE, pp. 480-483.

Carrubba, Vincenzo, Akmal, Muhammad, Quay, Rüdiger, Lees, Jonathan, Benedikt, Johannes, Cripps, Stephen Charles and Tasker, Paul J. 2012. The Continuous Inverse Class-F Mode With Resistive Second-Harmonic Impedance. IEEE Transactions on Microwave Theory and Techniques 60 (6) , pp. 1928-1936. 10.1109/TMTT.2012.2189228

Hone, Thomas M., Bensmida, Souheil, Morris, Kevin A., Beach, Mark A., McGeehan, Joe P., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2012. Controlling Active Load-Pull in a Dual-Input Inverse Load Modulated Doherty Architecture. IEEE Transactions on Microwave Theory and Techniques 60 (6) , pp. 1797-1804. 10.1109/TMTT.2012.2190748

McGenn, William, Choi, Heungjae, Lees, Jonathan, Uren, Michael J., Benedikt, Johannes and Tasker, Paul J. 2012. Development of a RF waveform stress test procedure for GaN HFETs subjected to infinite VSWR sweeps. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012. Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE, pp. 1-3. 10.1109/MWSYM.2012.6259725

Carrubba, V., Quay, R., Schlechtweg, M., Ambacher, O., Akmal, M., Lees, Jonathan, Benedikt, Johannes, Tasker, Paul J. and Cripps, Stephen Charles 2012. Continuous-ClassF3 power amplifier mode varying simultaneously first 3 harmonic impedances. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012. Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE, pp. 1-3. 10.1109/MWSYM.2012.6258343

Smith, R. M., Lees, Jonathan, Tasker, Paul J., Benedikt, Johannes and Cripps, Stephen Charles 2012. A 40W push-pull power amplifier for high efficiency, decade bandwidth applications at microwave frequencies. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest (MTT, Montreal, Canada, 17-22 June 2012. Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE, pp. 1-3. 10.1109/MWSYM.2012.6259418

Smith, Robert Martin, Lees, Jonathan, Tasker, Paul J., Benedikt, Johannes and Cripps, Stephen Charles 2012. A Novel Formulation for High Efficiency Modes in Push-Pull Power Amplifiers Using Transmission Line Baluns. IEEE Microwave and Wireless Components Letters 22 (5) , pp. 257-259. 10.1109/LMWC.2012.2191273

Tasker, Paul J., Carrubba, Vincenzo, Wright, P., Lees, Jonathan, Benedikt, Johannes and Cripps, Stephen Charles 2012. Wideband PA design: The "continuous" mode of operation. Presented at: Compound Semiconductor Integrated Circuit Symposium (CSICS), La Jolla, CA, USA, 14-17 October 2012. Compound Semiconductor Integrated Circuit Symposium (CSICS), 2012 IEEE. IEEE, pp. 1-4. 10.1109/CSICS.2012.6340048

Mimis, K., Morris, K. A., Beach, M. A., McGeehan, J. P., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2012. Overlapped segment piece-wise polynomial pre-distortion for the linearisation of power amplifiers in the presence of high PAPR OFDM signals. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012. Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. pp. 1-3. 10.1109/MWSYM.2012.6259543

Akmal, Muhammad, Carrubba, Vincenzo, Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2012. An enhanced modulated waveform measurement system. Australian Journal of Electrical and Electronics Engineering 9 (4) , pp. 429-438. 10.7158/E11-033.2012.9.4

Arnold, M., Featherston, Carol Ann, Pearson, Matthew R., Lees, Jonathan and Kural, Aleksander 2012. Energy management systems for energy harvesting in structural health monitoring applications. Key Engineering Materials 518 , pp. 137-153. 10.4028/www.scientific.net/KEM.518.137

Akmal, Muhammad, Ogboi, Friday Lawrence, Yusoff, Zubaida Binti, Lees, Jonathan, Carrubba, Vincenzo, Choi, Heungjae, Bensmida, S., Morris, K., Beach, M., McGeehan, J., Benedikt, Johannes and Tasker, Paul J. 2012. Characterization of electrical memory effects for complex multi-tone excitations using broadband active baseband load-pull. Presented at: 7th European Microwave Integrated Circuits Conference, Amsterdam, The Netherlands, 29-30 October 2012. 7th European Microwave Integrated Circuits Conference (EuMIC), 2012. Picastaway, NJ: IEEE, pp. 885-888.

Pullin, Rhys, Eaton, Mark Jonathan, Pearson, Matthew R., Featherston, Carol Ann, Lees, Jonathan, Naylon, Alexander Jack, Kural, Aleksander, Simpson, David J. and Holford, Karen Margaret 2012. On the Development of a Damage Detection System using Macro-fibre Composite Sensors. Journal of Physics. Conference Series 382 (1) , 012049. 10.1088/1742-6596/382/1/012049

Carrubba, Vincenzo, Clarke, Alan Leslie, Akmal, Muhammad, Lees, Jonathan, Benedikt, Johannes, Tasker, Paul J. and Cripps, Stephen Charles 2011. On the extension of the continuous class-F mode power amplifier. IEEE Transactions on Microwave Theory and Techniques 59 (5) , pp. 1294-1303. 10.1109/TMTT.2011.2117435

Paynter, M., Bensmida, S., Morris, K. A., McGeehan, J. P., Akmal, Muhammad, Lees, Jonathan, Benedikt, Johannes, Tasker, Paul J. and Beach, M. 2011. Non-linear large signal PA modelling for switching-mode operation (class-F/continuous class-F). Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011. Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE, pp. 152-155.

FitzPatrick, Dominic, Saini, Randeep, Lees, Jonathan, Benedikt, Johannes, Cripps, Stephen Charles and Tasker, Paul J. 2011. A waveform engineering approach to the design of improved efficiency wideband MMIC amplifiers. Presented at: Wireless and Microwave Technology Conference (WAMICON), 2011 IEEE 12th Annual., Clearwater Beach, FL, USA, 18-19 April 2011. 2011 IEEE 12th Annual Wireless and Microwave Technology Conference (WAMICON), Clearwater Beach, FL, 18-19 April 2011. Los Alamitos, CA: IEEE, pp. 225-230. 10.1109/WAMICON.2011.5872859

Yusoff, Zubaida Binti, Akmal, Muhammad, Carrubba, Vincenzo, Lees, Jonathan, Benedikt, Johannes, Tasker, Paul J. and Cripps, Stephen Charles 2011. The benefit of GaN characteristics over LDMOS for linearity improvement using drain modulation in power amplifier system. Presented at: 2011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, Vienna, Austria, 18-19 April 2011. 2011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC 2011). New York: IEEE, pp. 109-112. 10.1109/INMMIC.2011.5773334

Akmal, Muhammad, Carrubba, Vincenzo, Lees, Jonathan, Bensmida, S., Benedikt, Johannes, Morris, K., Beach, M., McGeehan, J. and Tasker, Paul J. 2011. Linearity enhancement of GaN HEMTs under complex modulated excitation by optimizing the baseband impedance environment. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011. Published in: Seigel, Peter, Remley, Kate, Tzuang, C. and Ponchak, George eds. 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE, pp. 1747-1750. 10.1109/MWSYM.2011.5972833

Smith, Robert Martin, Cripps, Stephen Charles, Tasker, Paul J., Benedikt, Johannes and Lees, Jonathan 2011. A design methodology for the realization of multi-decade baluns at microwave frequencies. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011. Published in: Seigel, Peter, Remley, Kate, Tzuang, C. and Ponchak, George eds. 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE, pp. 1204-1208. 10.1109/MWSYM.2011.5972702

Bell, James Joseph, Saini, Randeep, Woodington, Simon Philip, Lees, Jonathan, Benedikt, Johannes, Cripps, Stephen Charles and Tasker, Paul J. 2011. Behavioral model analysis using simultaneous active fundamental load-pull and harmonic source-pull measurements at X-band. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011. Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International. New York: IEEE, pp. 982-986. 10.1109/MWSYM.2011.5972803

Carrubba, Vincenzo, Lees, Jonathan, Benedikt, Johannes, Tasker, Paul J. and Cripps, Stephen Charles 2011. A novel highly efficient broadband continuous class-F RFPA delivering 74% average efficiency for an octave bandwidth. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011. 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE, pp. 350-353. 10.1109/MWSYM.2011.5972701

Yusoff, Zubaida Binti, Lees, Jonathan, Benedikt, Johannes, Tasker, Paul J. and Cripps, Stephen Charles 2011. Linearity improvement in RF power amplifier system using integrated Auxiliary Envelope Tracking system. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011. Published in: Seigel, Peter, Remley, Kate, Tzuang, C. and Ponchak, George eds. 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE, pp. 1752-1755. 10.1109/MWSYM.2011.5972769

Saini, Randeep, Bell, James Joseph, Canning, Timothy A. J., Woodington, Simon P., Fitzpatrick, Dominic M., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2011. High speed non-linear device characterization and uniformity investigations at X-band frequencies exploiting behavioral models. Presented at: 2011 77th ARFTG Microwave Measurement Conference (ARFTG), Baltimore, MD, USA, 10 June 2011. Design and Measurement of Microwave Systems - Proceedings of the 2011 77th ARFTG Microwave Measurement Conference (ARFTG). Los Alamitos, CA: IEEE, 10.1109/ARFTG77.2011.6034552

Carrubba, Vincenzo, Clarke, Alan Leslie, Woodington, Simon P., McGenn, William, Akmal, Muhammad, Almuhaisen, Abdullah, Lees, Jonathan, Cripps, Stephen Charles, Tasker, Paul J. and Benedikt, Johannes 2011. High-speed device characterization using an active load-pull system and waveform engineering postulator. Presented at: 2011 77th ARFTG Microwave Measurement Conference (ARFTG), Baltimore, MD, USA, 10 June 2011. Design and Measurement of Microwave Systems - Proceedings of the 2011 77th ARFTG Microwave Measurement Conference (ARFTG). Los Alamitos, CA: IEEE, 10.1109/ARFTG77.2011.6034553

Canning, Timothy A. J., Almuhaisen, Abdullah, Lees, Jonathan, Benedikt, Johannes, Cripps, Stephen Charles and Tasker, Paul J. 2011. Utilization of RF I-V waveform load-pull information to identify the role FET knee profile has on locating the efficiency maxima. Presented at: 2011 78th ARFTG Microwave Measurement Symposium (ARFTG), Tempe, AZ, USA, 1-2 December 2011. Proceedings of the 2011 78th ARFTG Microwave Measurement Symposium (ARFTG) - High Power RF Measurement Techniques. Los Alamitos, CA: IEEE, 10.1109/ARFTG78.2011.6183864

Saini, Randeep, Bell, James Joseph, Williams, T., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2011. Interpolation and extrapolation capabilities of non-linear behavioural models. Presented at: 2011 78th ARFTG Microwave Measurement Symposium (ARFTG), Tempe, AZ, USA, 1-2 December 2011. Proceedings of the 2011 78th ARFTG Microwave Measurement Symposium (ARFTG) - High Power RF Measurement Techniques. Los Alamitos, CA: IEEE, 10.1109/ARFTG78.2011.6183865

Carrubba, Vincenzo, Clarke, Alan Leslie, Akmal, Muhammad, Yusoff, Zubaida Binti, Lees, Jonathan, Benedikt, Johannes, Cripps, Stephen Charles and Tasker, Paul J. 2011. Exploring the Design Space for Broadband PAs using the Novel "Continuous Inverse Class-F Mode". Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011. Proceedings of the 41st European Microwave Conference (EuMC). IEEE, pp. 333-336.

Hone, T., Bensmida, S., Paynter, M., Morris, K., Beach, M., McGeehan, J., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2011. Optimized load modulation in a doherty amplifier using a current injection technique. Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011. Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE, pp. 296-299.

Akmal, Muhammad, Lees, Jonathan, Jiangtao, S., Carrubba, Vincenzo, Yusoff, Zubaida Binti, Woodington, Simon Philip, Benedikt, Johannes, Tasker, Paul J., Bensmida, S., Morris, K., Beach, M. and McGeehan, J. 2011. An enhanced modulated waveform measurement system for the robust characterization of microwave devices under modulated excitation. Presented at: Microwave Integrated Circuits Conference (EuMIC), 2011 European, Manchester, 10-11 October 2011. Microwave Integrated Circuits Conference (EuMIC), 2011 European. IEEE, pp. 180-183.

Almuhaisen, Abdullah, Lees, Jonathan, Cripps, Stephen Charles, Tasker, Paul J. and Benedikt, Johannes 2011. Wide band high-efficiency power amplifier design. Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011. Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE, pp. 184-187.

Hashmi, Mohammad Shabi, Clarke, Alan Leslie, Lees, Jonathan, Helaoui, M., Tasker, Paul J. and Ghannouchi, F. M. 2010. Agile harmonic envelope load-pull system enabling reliable and rapid device characterization. Measurement Science and Technology 21 (5) , 055109. 10.1088/0957-0233/21/5/055109

Hashmi, Mohammad Shabi, Clarke, Alan Leslie, Woodington, Simon Philip, Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2010. An accurate calibrate-able multiharmonic active load-pull system based on the envelope load-pull concept. IEEE Transactions on Microwave Theory and Techniques 58 (3) , pp. 656-664. 10.1109/TMTT.2010.2040403

Akmal, M., Lees, Jonathan, Bensmida, S., Woodington, S., Carrubba, V., Cripps, Stephen Charles, Benedikt, Johannes, Morris, K., Beach, M., McGeehan, J. and Tasker, Paul 2010. The effect of baseband impedance termination on the linearity of GaN HEMTs. Presented at: European Microwave Conference 2010, Paris, France, , vol. 561636. pp. 1046-1049.

Akmal, M., Lees, Jonathan, Bensmida, S., Woodlington, S., Benedikt, Johannes, Morris, K., Beach, M., McGeehan, J. and Tasker, Paul 2010. The impact of baseband electrical memory effects on the dynamic transfer characteristics of microwave power transistors. Presented at: 2010 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), Gothenburg, Sweden, , vol. 548011. pp. 148-151.

Clarke, Alan Leslie, Akmal, Muhammad, Lees, Jonathan, Tasker, Paul J. and Benedikt, Johannes 2010. Investigation and analysis into device optimization for attaining efficiencies in-excess of 90% when accounting for higher harmonics. Presented at: IEEE MTT-S International Microwave Symposium, Anaheim, CA, USA, 23-28 May 2010. 2010 IEEE MTT-S International Microwave Symposium Digest (MTT 2010). New York: IEEE, pp. 1114-1117. 10.1109/MWSYM.2010.5517222

Woodington, Simon Philip, Saini, Randeep, Williams, D., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2010. Behavioral model analysis of active harmonic load-pull measurements. Presented at: IEEE MTT-S International Microwave Symposium, Anaheim, CA, USA, 23-28 May 2010. Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International. New York: IEEE, pp. 1688-1691. 10.1109/MWSYM.2010.5517261

Almuhaisen, Abdullah, Wright, Peter Thomas, Lees, Jonathan, Tasker, Paul J., Cripps, Stephen Charles and Benedikt, Johannes 2010. Novel wide band high-efficiency active harmonic injection power amplifier concept. Presented at: IEEE MTT-S International Microwave Symposium, Anaheim, CA, USA, 23-28 May 2010. 2010 IEEE MTT-S International Microwave Symposium Digest (MTT 2010). New York: IEEE, pp. 664-667. 10.1109/MWSYM.2010.5514759

FitzPatrick, D. M., Williams, T., Lees, Jonathan, Benedikt, Johannes, Cripps, Stephen Charles and Tasker, Paul 2010. Exploitation of active load-pull and DLUT models in MMIC design. Presented at: IEEE Radio Frequency Integrated Circuits Symposium, Anaheim, CA, USA, 23-25 May 2010. Proceedings of the 2010 IEEE Radio Frequency Integrated Circuits Symposium May 23-25, 2010, Anaheim, California, USA. Piscataway, NJ: IEEE, pp. 487-490. 10.1109/RFIC.2010.5477406

Naylon, Alexander Jack, Gooding, S., John, C., Morgan, Alex John, Squires, O., Lees, Jonathan, Barrow, David Anthony and Porch, Adrian 2010. Efficient Microwave heating and dielectric characterization of microfluidic systems. Presented at: Proceedings of MicroTAS 2010, Groningen, The Netherlands, pp. 2092-2094.

Bensmida, S., Morris, K., Akmal, Muhammad, Lees, Jonathan, Wright, Peter Thomas, Benedikt, Johannes, Tasker, Paul J., McGeehan, J. and Beach, M. 2010. Generic pre-distortion of a Class-J Power amplifier. Presented at: European Microwave Conference 2010, Paris, France, , vol. 561648. pp. 1022-1025.

Carrubba, V., Clarke, A. L., Akmal, M., Lees, Jonathan, Benedikt, Johannes, Tasker, Paul and Cripps, Stephen Charles 2010. The continuous Class-F Mode mode power amplifier. Presented at: European Microwave Conference (EuMC) 2010, Paris, France, , vol. 561630. pp. 1674-1677.

Lees, Jonathan, Akmal, M., Bensmida, S., Benedikt, Johannes, Morris, K., Beach, M., McGeehan, J. and Tasker, Paul 2010. Waveform engineering applied to linear-efficient PA design. Presented at: 2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON 2010), Melbourne Beach, USA, 12-13 April, 2010. , vol. 546184. 10.1109/WAMICON.2010.5461847

Saini, Randeep, Woodington, Simon P., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2010. An intelligence driven active loadpull system. Presented at: 75th ARFTG Microwave Measurement Conference: Measurement of Modulated Signals for Communications, Anaheim, USA, , vol. 549632.

Akmal, Muhammad, Lees, Jonathan, Carrubba, Vincenzo, Bensmida, S., Woodington, S., Benedikt, Johannes, Morris, K, Beach, M., McGeehan, J. and Tasker, Paul J. 2010. Minimization of baseband electrical memory effects in GaN HEMTs using active IF load-pull. Presented at: Asia-Pacific Microwave Conference (22nd : 2010), Yokahama-shi, Japan, 7-10 December 2010. 2010 Asia-Pacific Microwave Conference proceedings : APMC 2010 : Dec. 7-10, Yokohama, Japan. Tokyo, Japan: Institute of Electronics, Information and Communication Engineers (IEICE), pp. 5-8.

Wright, P., Lees, Jonathan, Benedikt, Johannes, Tasker, Paul and Cripps, Stephen Charles 2009. A Methodology for Realizing High Efficiency Class-J in a Linear and Broadband PA. IEEE Transactions on Microwave Theory and Techniques 57 (12) , pp. 3196-3204. 10.1109/TMTT.2009.2033295

Fitzpatrick, Dominic M., Lees, Jonathan, Sheikh, Abdulla, Benedikt, Johannes and Tasker, Paul J. 2009. Systematic investigation of the impact of harmonic termination in the efficiency performance of above octave bandwidth microwave amplifiers. Presented at: European Microwave Conference, 2009 (EuMC 2009), Rome, Italy, 29 September - 1 October 2009. European Microwave Week 2009 - "Science, Progress and Quality at Radiofrequencies": Conference Proceedings. London: Horizon House Publications, pp. 1445-1448.

Cripps, Stephen Charles, Tasker, Paul, Clarke, A. L., Lees, Jonathan and Benedikt, Johannes 2009. On the continuity of high efficiency modes in linear RF power amplifiers. IEEE Microwave and Wireless Components Letters 19 (10) , pp. 665-667. 10.1109/LMWC.2009.2029754

Sheikh, A., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2009. Utilization of a measurement based CAD tool for enhanced pa design investigations. Presented at: 38th European Microwave Conference, 2008 (EuMC 2008), Amsterdam, The Netherlands, 27-31 October 2008. Proceedings of the 38th European Microwave Conference, 2008 (EuMC 2008). Los Alamitos, CA: IEEE, pp. 1671-1674. 10.1109/EUMC.2008.4751795

Hashmi, M. S., Clarke, A. L., Woodington, S. P., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul 2009. Electronic Multi-Harmonic Load-Pull System for Experimentally Driven Power Amplifier Design Optimization. Presented at: IEEE/MTT-S International Microwave Symposium 2009, Boston, USA, pp. 1549-1552.

Wright, Peter Thomas, Lees, Jonathan, Tasker, Paul J., Benedikt, Johannes and Cripps, Stephen Charles 2009. An Efficient, Linear, Broadband Class-J-Mode PA Realised Using RF. Presented at: IEEE/MTT-S International Microwave Symposium 2009, Boston, MA, USA, 7-12 June 2009. IEEE MTT-S International Microwave Symposium Digest, 2009. MTT '09. Los Alamitos, CA: IEEE, pp. 653-656. 10.1109/MWSYM.2009.5165781

Bensmida, S., Morris, K., Lees, Jonathan, Wright, Peter Thomas, Benedikt, Johannes, Tasker, Paul J., Beach, M. and McGeehan, J. 2009. Power amplifier memory-less pre-distortion for 3GPP LTE application. Presented at: European Microwave Conference, 2009 (EuMC 2009), Rome, Italy, 29 September - 1 October 2009. European Microwave Week 2009 - "Science, Progress and Quality at Radiofrequencies": Conference Proceedings. London: Horizon House Publications, pp. 1433-1436.

Alghanim, A., Lees, Jonathan, Williams, T., Benedikt, Johannes and Tasker, Paul J 2008. Sensitivity of electrical baseband memory effects to higher-order IF components for high-power LDMOS power amplifiers. Electronics Letters 44 (5) , pp. 358-359. 10.1049/el:20083348

Alghanim, A., Lees, Jonathan, Williams, T., Benedikt, Johannes and Tasker, Paul 2008. Reduction of electrical baseband memory effect in high-power LDMOS devices using optimum termination for IMD3 and IMD5 using active load-pull. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA, pp. 415-418. 10.1109/MWSYM.2008.4633191

FitzPatrick, D. M., Williams, T., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul 2008. Large signal device characterisation using active load-pull for improved MMIC design. Presented at: IET Seminar on RF and Microwave IC Design, London, UK, IET, pp. 1-7.

Lees, Jonathan, Williams, T., Woodington, S., McGovern, P., Cripps, Stephen Charles, Benedikt, Johannes and Tasker, Paul 2008. Demystifying Device related Memory Effects using Waveform Engineering and Envelope Domain Analysis. Presented at: 38th European Microwave Conference 2008 (EuMC 2008), Amsterdam, The Netherlands, pp. 753-756. 10.1109/EUMC.2008.471562

Williams, T., Mojon, O., Woodington, Simon Philip, Lees, Jonathan, Barciela, M. F., Benedikt, Johannes and Tasker, Paul J. 2008. A robust approach for comparison and validation of large signal measurement systems. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA, pp. 257-260. 10.1109/MWSYM.2008.4633152

Woodington, Simon Philip, Williams, T., Qi, H., Williams, D., Pattison, L., Patterson, A., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2008. A novel measurement based method enabling rapid extraction of a RF waveform look-up table based behavioural model. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA, pp. 1453-1456. 10.1109/MWSYM.2008.463305

Wright, Peter Thomas, Lees, Jonathan, Tasker, Paul J. and Benedikt, Johannes 2008. GaN power transistors in narrow and wide bandwidth applications. Presented at: IET Seminar on Wideband Receivers and Components, London, UK, p. 1.

Alghanim, A., Lees, Jonathan, Wiliams, T., Benedikt, Johannes and Tasker, Paul 2007. Investigation of electrical base-band memory effects in high power 20w LDMOS power amplifiers. Presented at: 37th European Microwave Conference, Munich, Germany, pp. 48-51. 10.1109/EUMC.2007.4405122

Sheikh, A., Tasker, Paul J., Lees, Jonathan and Benedikt, Johannes 2007. The impact of system impedance on the characterisation of high power devices. Presented at: 37th European Microwave Conference (EuMC), Munich, Germany, pp. 949-952. 10.1109/EUMC.2007.4405315

Alghanim, A., Lees, Jonathan, Williams, T., Benedikt, Johannes and Tasker, Paul J. 2007. Using active IF load-pull to investigate electrical base-band induced memory effects in high-power LDMOS transistors. Presented at: Asia-Pacific Microwave Conference (APMC 2007), Bangkok, Thailand, IEEE, pp. 1-4. 10.1109/APMC.2007.4554737

Mayer, M., Arthaber, H., Magerl, G., Kother, D., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul 2006. Advanced load pull systems. Presented at: The Institution of Engineering and Technology Seminar on High Efficiency Power Amplifier Design for Next Generation Wireless Applications, Cambridge, UK, pp. 27-54.

Aubrey, A. J., Hicks, Yulia Alexandrovna, Lees, Jonathan and Chambers, J. A 2006. Using the bi-modality of speech for convolutive frequency domain blind source separation. Presented at: Proceedings of IMA 7th International Conference on Mathematics in Signal Processing, Cirencester, UK,

Lees, Jonathan, Sheikj, A., Benedikt, Johannes and Tasker, Paul 2006. The Design of a Gallium Nitride Doherty Amplifier using Waveform Measurements and Active Harmonic Load-Pull. Presented at: 2006 International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits, Aveiro, Portugal, pp. 26-29.

Lees, Jonathan. 2006. Doherty amplifier structures for modern microwave communication systems. PhD Thesis, Cardiff University.
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Aboush, Zaid, Lees, Jonathan, Benedikt, Johannes and Tasker, Paul J. 2005. Active harmonic load-pull system for characterising highly mismatched high power transistors. Presented at: IEEE MTT-S International Microwave Symposium Digest 2005, 2005. 10.1109/MWSYM.2005.1516920

Aboush, Z., Jones, C., Knight, G., Sheikh, A., Lee, H., Lees, Jonathan, Benedikt, Johannes and Tasker, Paul 2005. High power active harmonic load-pull system for characterisation of high power 100-Watt transistors. Presented at: 35th European Microwave Conference, Paris, France, pp. 609-612. 10.1109/EUMC.2005.1608930

Lees, Jonathan, Benedikt, Johannes, Hilton, P., Powell, J., Balmer, R. S., Uren, Michael John, Martin, T. and Tasker, Paul 2005. Experimental gallium nitride microwave Doherty amplifier. IEEE Electronic Letters 41 (23) , pp. 1284-1285. 10.1049/el:20053155

Lees, Jonathan, Benedikt, Johannes, Bunz, B., Gaquiere, C., Ducatteau, D., Marquez-Sequra, E., Martin-Guerrero, T. M. and Barel, A. 2005. A comparison of load-pull measurement results of a 4W Phemt involving five European laboratories. Presented at: European Gallium Arsenide and Other Semiconductor Application Symposium, Paris, France, 3-4 October, 2005. Proceedings of the European Gallium Arsenide and Other Semiconductor Application Symposium Paris, France,3-4 October, 2005. IEEE, pp. 321-324.

Lees, Jonathan, Benedikt, Johannes, Hilton, K. P., Powell, J., Balmer, R. S., Uren, M. J., Martin, T. and Tasker, Paul 2005. Characterisation of an experimental gallium nitride microwave Doherty amplifier. Presented at: 35th European Microwave Conference, Paris, France, 4-6 October 2005. 35th European Microwave Conference: conference proceedings. Horizon House,

Lees, Jonathan, Haczewski, J., Benedikt, Johannes and Tasker, Paul 2004. An automated multi-stimulus measurement system for characterising multi-device amplifiers. Presented at: 34th European Microwave Conference, Amsterdam, The Netherlands, pp. 435-438.

Lees, Jonathan, Goss, M., Benedikt, Johannes and Tasker, Paul 2003. Single-tone optimisation of an adaptive-bias Doherty structure. Presented at: Microwave Symposium Digest, IEEE MTT-S International, Philadelphia, USA, 8-13 June 2003. Microwave Symposium Digest, IEEE MTT-S International. IEEE, pp. 2213-2216. 10.1109/MWSYM.2003.1210604

This list was generated on Thu Dec 14 03:01:35 2017 GMT.