
Selected Reprints
2017
 Matthew Fellows, Lucilia Lamers, Charles Baylis, Lawrence Cohen, Robert J. Marks, "A fast loadpull optimization for poweradded efficiency under output power and ACPR constraints,'' IEEE Transactions on Aerospace and Electronic Systems, 2016, v.52, #6, pp.2906  2916. DOI: 10.1109/TAES.2016.150313.
 Charles Baylis, Lawrence Cohen, Dylan Eustice, Robert Marks. "Myths concerning Woodward's ambiguity function: analysis and resolution,'' IEEE Transactions on Aerospace and Electronic Systems, 2016, v.52, #6, pp. 2886  2895. DOI: 10.1109/TAES.2016.15073
 Matthew W. Fellows, Sarvin Rezayat, Alicia Magee, Charles Baylis, Lawrence Cohen,
Robert J. Marks II, “OPTIMIZATION OF LOAD IMPEDANCE AND BIAS VOLTAGE
FOR POWERADDED EFFICIENCY, DELIVERED POWER, AND ADJACENTCHANNEL
POWER RATIO USING THE BIAS SMITH TUBE.” USNCURSI National
Radio Science Meeting, January 2017, Boulder, Colorado.
 Zachary Hays, Lucilia Lamers, Charles Baylis, Robert Marks II, Ed Viveiros, Ali
Darwish, John Penn, Abigail Hedden. “COMPARISON OF GAIN OPTIMIZATION
TECHNIQUES ON RECONFIGURABLE POWER AMPLIFIERS WITH A REALTIME
VARACTOR TUNING NETWORK.” USNCURSI National Radio Science
Meeting, January 2017, Boulder, Colorado.
 Charles Baylis, Robert J. Marks II, Liang Dong, Andrew Clegg, Lawrence Cohen. “DYNAMIC
SPECTRUM COLLABORATION BETWEEN RADAR AND WIRELESS
COMMUNICATION: A PROPOSED FRAMEWORK FOR THE SIMULTANEOUS
OPTIMIZATION OF POLICY, NETWORKS, AND CIRCUITS.” USNCURSI National
Radio Science Meeting, January 2017, Boulder, Colorado.
 Casey Latham, Alicia Magee, Jacob Boline, Alexander Tsatsoulas, Matthew Fellows,
Charles Baylis, Lawrence Cohen, Robert J. Marks II. “DUALLOOP JOINT CIRCUIT
ANDWAVEFORM OPTIMIZATION TECHNIQUE FOR AMBIGUITY FUNCTION,
SPECTRAL PERFORMANCE, AND POWER EFFICIENCY.” USNCURSI National
Radio Science Meeting, January 2017, Boulder, Colorado.
2016
 Dylan Eustice, Charles Baylis, Lawrence Cohen, and Robert J. Marks II. "Waveform synthesis via alternating projections with ambiguity function, peaktoaverage power ratio, and spectrum requirements." 2016 IEEE Radio and Wireless Symposium (RWS), pp. 190192. IEEE, 2016.
 Joseph Barkate, Alexander Tsatsoulas, Matthew Fellows, Matthew Flachsbart, Charles Baylis, Lawrence Cohen, and Robert J. Marks II. "Fast, momentumaided optimization of transmitter amplifier load impedance and input power for cognitive radio using the power smith tube."2016 IEEE Radio and Wireless Symposium (RWS), pp. 5456. IEEE, 2016
 Matthew Fellows, Sarvin Rezayat, Jennifer Barlow, Joseph Barkate, Alexander Tsatsoulas, Charles Baylis, Lawrence Cohen, and Robert J. Marks II. "The bias smith tube: Simultaneous optimization of bias voltage and load impedance in power amplifier design." 2016 IEEE Radio and Wireless Symposium (RWS), pp. 215218. IEEE, 2016
 Charles Baylis, Matthew Fellows, Joseph Barkate, Alexander Tsatsoulas, Sarvin Rezayat, Lucilia Lamers, Robert J. Marks II, and Lawrence Cohen. "Circuit optimization algorithms for realtime spectrum sharing between radar and communications." IEEE Radar Conference (RadarConf), pp. 14, 2016. DOI: 10.1109/RADAR.2016.7485065 (html)
 Joseph Barkate, Matthew Flachsbart, Zachary Hays, Matthew Fellows, Jennifer Barlow, Charles Baylis, Lawrence Cohen, and Robert J. Marks II "Fast, simultaneous optimization of power amplifier input power and load impedance for poweradded efficiency and adjacentchannel power ratio using the power smith tube," IEEE Transactions on Aerospace and Electronic Systems 52, no. 2 (2016) pp.928937. DOI: 110.1109/TAES.2015.150335 (html)
 Alexander Tsatsoulas, Joseph Barkate, Charles Baylis, and Robert J. Marks. "A simplex optimization technique for realtime, reconfigurable transmitter power amplifiers." 2016 IEEE MTTS International Microwave Symposium (IMS), San Francisco, California, 2227 May 2016, pp. 14. IEEE, 2016. DOI: 10.1109/MWSYM.2016.7540376 (html)
 Casey Latham, Charles Baylis, Lawrence Cohen, Robert J. Marks. "Dynamic spectral mask construction for radar transmission based on communication receiver locations." 2016 Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS) March 31April 1, 2016, Waco, TX.
2015
 Matthew Fellows, Charles Baylis, Lawrence Cohen, Robert J. Marks II. "Realtime load impedance optimization for radar spectral mask compliance and power efficiency." IEEE Transactions on Aerospace and Electronic Systems, Volume 51, no. 1 (2015) pp.591599.
DOI: 10.1109/TAES.2014.130825
 Joseph Barkate, Matthew Fellows, Jennifer Barlow, Charles Baylis, and Robert J. Marks. "The Power Smith Tube: Joint optimization of power amplifier input power and load impedance for poweradded efficiency and adjacentchannel power ratio." In Wireless and Microwave Technology Conference (WAMICON), 2015 IEEE 16th Annual, pp. 14. IEEE, 2015.
 Matthew Fellows, Jennifer Barlow, Matthew Flachsbart, Joseph Barkate,Charles Baylis, Lawrence Cohen & Robert J Marks. "Fast radar power amplifier optimization for bandwidth, efficiency, and spectral confinement using the Smith Tube," IEEE International Radar Conference (RadarCon 2015), Arlington, VA, May 1115, 2015, pp. 139  144, DOI: 10.1109/RADAR.2015.7130985
 Dylan Eustice, Charles Baylis, Lawrence Cohen, Robert J Marks, "Effects of power amplifier nonlinearities on the radar ambiguity function," IEEE International Radar Conference (RadarCon 2015), Arlington, VA, May 1115, 2015, pp. 1725  1729 DOI: 10.1109/RADAR.2015.7131277
 Matthew Fellows, Jennifer Barlow, Charles Baylis, Joseph Barkate, Robert J. Marks II. "Designing power amplifiers for spectral compliance using spectral mask loadpull measurements." IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications (PAWR), San Diego, Jan 2528, 2015, pp.13. DOI: 10.1109/PAWR.2015.7139199
 Matthew Fellows, Matthew Flachsbart, Jennifer Barlow, Joseph Barkate, Charles Baylis, Lawrence Cohen, Robert J. Marks II. "Optimization of poweramplifier load impedance and waveform bandwidth for realtime reconfigurable radar." IEEE Transactions on Aerospace and Electronic Systems, 51, no. 3 (2015)
 Joseph Barkate, Matthew Fellows, Jennifer Barlow, Charles Baylis, and Robert J. Marks II. “The Power Smith Tube: Joint optimization of power amplifier input power and load impedance for poweradded efficiency and adjacentchannel power ratio.” Wireless and Microwave Technology Conference (WAMICON), 2015 IEEE 16th Annual, pp. 14. IEEE, 2015.
 Matthew Fellows, Jennifer Barlow, Matthew Flachsbart, Joseph Barkate, Charles Baylis, Larry Cohen, Robert Marks II. “Fast Radar Power Amplifier Optimization for Bandwidth, Efficiency, and Spectral Confinement Using the Smith Tube,” 2015 IEEE International Radar Conference (RadarCon), May 1115, Arlington Va.
 Dylan Eustice, Charles Baylis and Robert J. Marks II, “Woodwards Ambiguity Function: From Foundations to Applications,” 2015 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS), April 2324, 2015. Waco, Texas (pp. 117).
 Dylan Eustice, Charles Baylis, Casey Latham, Robert J. Marks II, and Lawrence Cohen “Optimizing RadarWaveforms Using Generalized Alternating Projections,” 2015 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS), April 2324,2015. Waco, Texas (pp. 16)
 Charles Baylis, Robert J. Marks, and Lawrence Cohen "Pareto optimization of radar receiver lownoise amplifier source impedance for low noise and high gain" International Journal of Microwave and Wireless Technologies, (Cambridge University Press and the European Microwave Association) November 2015 (pp. 17)
2014
 Charles Baylis, Joshua Martin, Matthew Moldovan, Robert J. Marks II, Lawrence Cohen, Jean de Graaf, Robert Johnk and Frank Sanders, "Spectrum Analysis Considerations for Radar Chirp Waveform Spectral Compliance Measurements," IEEE Transactions on Electromagnetic Compatibility, Volume 56 , #3, June 2014, pp.520529 [html]
DOI: 10.1109/TEMC.2013.2291540
 Charles Baylis, Matthew Fellows, Lawrence Cohen, and Robert J. Marks II, "Solving the Spectrum Crisis: Intelligent, Reconfigurable Microwave Transmitter Amplifiers for Cognitive Radar,'' IEEE Microwave Magazine, Volume: 15, Issue:5, JulyAug. 2014, pp. 94  107.
 Matthew Fellows, Matthew Flachsbart, Jennifer Barlow, Charles Baylis, and Robert J. Marks II. "The Smith tube: Selection of radar chirp waveform bandwidth and power amplifier load impedance using multiplebandwidth loadpull measurements," IEEE 15th Annual Wireless and Microwave Technology Conference (WAMICON), pp. 15. IEEE, 2014.
DOI: 10.1109/WAMICON.2014.6857780
 Matthew Fellows, Jennifer Barlow, Joseph Barkate, Matthew Mosley, Matthew Flachsbart, Charles Baylis, Lawrence Cohen, and Robert J. Marks II, "MeasurementBased Radar Waveform Optimization Using the Ambiguity Function and Spectral Mask," 2014 Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS), April 34, 2014, Waco, Texas pp.14.
DOI: 10.1109/WMCaS.2014.7015886
 Zachary Hays, Grant Richter, Stephen Berger, Charles Baylis, Robert J. Marks II, "Alleviating airport WiFi congestion: A comparison of 2.4 GHz and 5 GHz WiFi usage and capabilities," 2014 Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS), April 34, 2014, Waco, Texas pp.14.
DOI: 10.1109/WMCaS.2014.7015885
 Charles Baylis, Matthew Fellows, Matthew Flachsbart, Jennifer Barlow, Joseph Barkate, and Robert J. Marks II "Enabling the Internet of Things: Reconfigurable power amplifier techniques using intelligent algorithms and the Smith tube.'' Circuits and Systems Conference (DCAS), 2014 IEEE Dallas, pp. 14. IEEE, 2014.
2013
 Matthew Fellows, Charles Baylis, Lawrence Cohen, and Robert J. Marks II, "Radar Waveform Optimization Design to Minimize Spectral Spreading and Optimize Target Detection," 2013 Texas Symposium on Wireless & Microwave Circuits & Systems, Waco, Texas, April 45, 2013 (4 pgs) DOI: 10.1109/WMCaS.2013.6563564
 Charles Baylis, Josh Martin, Matthew Fellows, David Moon, Matt Moldovan, Lawrence Cohen, Robert J. Marks II, "Radar power amplifier circuit and waveform optimization for spectrally confined, reconfigurable radar systems,'' 2013 IEEE Radar Conference (RADAR), Ottawa, ON, Canada, April 29May 3 2013, pp. 14. DOI: 10.1109/RADAR.2013.6586037.
 Matthew Fellows, Charles Baylis, Lawrence Cohen, and Robert J. Marks II. "Calculation of the Radar Ambiguity Function from TimeDomain Measurement Data for RealTime, AmplifierintheLoop Waveform Optimization." 2013 82nd ARFTG Microwave Measurement Conference, Ohio State University, Columbus, Ohio pp. 15. IEEE. [html]
2012
 J. Martin, C. Baylis, R.J. Marks II, L. Cohen, and J. de Graaf, “A PeakSearch Algorithm for Combined PAE and ACPR LoadPull,” Power Amplifier Symposium, La Jolla, California, September 2012 (ppt)
 Charles Baylis, Josh Martin, Matthew Moldovan, Obiageli Akinbule, Robert J. Marks II, "A Test Platform for RealTime Waveform and Impedance Optimization in Microwave Radar Systems," 2012 International Diversity & Design Conference, Kauai, Hawaii, 2227 January 2012, pp.14.
 Matthew Moldovan, Charles Baylis, Michael Wicks, Josh Martin, Robert J. Marks II, "Chirp Optimization Using Piecewise Linear Approach," 2012 International Diversity & Design Conference, Kauai, Hawaii, 2227 January 2012, pp.14.
 Josh Martin, Charles Baylis and Robert J. Marks II, and Matthew Moldovan, "Perturbation Size and Harmonic Limitations in Affine Approximation for Time Invariant Periodicity Preservation Systems," 2012 International Diversity & Design Conference, Kauai, Hawaii, 2227 January 2012, pp.15.
 Josh Martin, Matthew Moldovan, Charles Baylis, Robert J.Marks II, Lawrence Cohen, Jean de Graaf, "Radar chirp waveform selection and circuit optimization using ACPR loadpull measurement," 2012 IEEE 13th Annual Wireless and Microwave Technology Conference (WAMICON), pp.14, 1517 April 2012.
doi: 10.1109/WAMICON.2012.6208465
 Charles Baylis II and Robert J. Marks II, "Small Perturbation Harmonic Coupling In Nonlinear Periodicity Preservation Systems," IEEE Transactions on Circuits and Systems I: Regular Papers, vol.59, no.12, pp.30343045, Dec. 2012
 Charles Baylis II and Robert J. Marks II, "Evaluation of Harmonic Coupling Weights in Nonlinear Periodicity Preservation Systems," IEEE Transactions on Circuits and Systems I: Regular Papers, vol.59, no.12, pp.30243033, Dec. 2012
2011
 Charles Baylis, Lawrence Dunleavy, Steven Lardizabal, Robert J. Marks II, and Alberto Rodriguez, "Efficient Optimization Using Experimental Queries: A PeakSearch Algorithm for Efficient LoadPull Measurements," Journal of Advanced Computational Intelligence and Intelligent Informatics, Vol.15, No.1 pp. 1320, 2011
 Charles Baylis, Robert J. Marks II, Josh Martin, Hunter Miller, and Matthew Moldovan. "Going Nonlinear," IEEE Microwave Magazine, April 2011, pp.5564
 Charles Baylis, Joseph Perry, Matthew Moldovan, Robert J. Marks II, and Lawrence Dunleavy, "Use of a StepResponse Approximation for Thermal Transient Modeling in Power MOSFETs,'' 74th ARFTG (Automatic RF Techniques Group) Microwave Measurement Symposium, December 1st  4th, Broomfield/Boulder, Colorado, 2009, pp.14,
 Charles Baylis, Robert J. Marks, "Frequency multiplexing tickle tones to determine harmonic coupling weights in nonlinear systems,'' Microwave Measurement Symposium (ARFTG), 2011 78th ARFTG pp.17, 12 Dec. 2011. doi: 10.1109/ARFTG78.2011.6183868
2009
 Charles Baylis, Joseph Perry, Matthew Moldovan, Robert J. Marks II, and Lawrence Dunleavy, "Use of a StepResponse Approximation for Thermal Transient Modeling in Power MOSFETs,'' 74th ARFTG (Automatic RF Techniques Group) Microwave Measurement Symposium, December 1st  4th, Broomfield/Boulder, Colorado, 2009, pp.14,




