"Don't ask yourself what the world needs. Ask yourself what makes you come alive, and go do that, because what the world needs is people who have come alive."

-- Howard Thurman

"I have come that they may have life, and have it to the full."

-- Jesus Christ, John 10:10b (NIV)





Dr. Matthew A. Morgan, Scientist with Tenure

National Radio Astronomy Observatory
1180 Boxwood Estate Rd.
Charlottesville, VA. 22903
(434) 296-0217

matt.morgan@nrao.edu



BOOKS



M. Morgan, Relativistic Field Theory for Microwave Engineers, Woodcrest Books, September 2020.

M. Morgan, Principles of RF and Microwave Design, Norwood, MA: Artech House, November 2019.

M. Morgan, Reflectionless Filters, Norwood, MA: Artech House, January 2017.



RESOURCES

- Collected Transmission-Line Identities
- Maxwell's Equations and Associated Laws in Various Forms
- Geometric Algebra in Three Dimensions



PATENTS

M. Morgan, "Double-ridged waveguide horn antenna," U.S. Patent No. 10,559,885, February 11, 2020.

M. Morgan, "Deep rejection reflectionless filters," U.S. Patent No. 10,530,321, January 7, 2020, Taiwan Patent No. TWI699970B, July 21, 2020.

M. Morgan, "TEM line to double-ridged waveguide launcher," U.S. Patent No. 10,199,735, February 5, 2019.

M. Morgan, "Sub-network enhanced reflectionless filter topology," U.S. Patent No. 9,705,467, July 11, 2017, No. 10,230,348, March 12, 2019, Taiwan Patent No. TWI581494B, May 1, 2017, People's Republic of China Patent No. CN107078708B, February 9, 2021.

M. Morgan, "Optimal response reflectionless filter topologies," U.S. Patent No. 10,516,378, December 24, 2019.

M. Morgan, "Optimal response reflectionless filters," U.S. Patent No. 10,374,577, August 6, 2019, No. 10,263,592, April 16, 2019. Taiwan Patent No. TWI653826B, March 11, 2019.

M. Morgan, "Transmission line reflectionless filters," U.S. Patent No. 9,923,540, March 20, 2018, No. 10,277,189, April 30, 2019, Japan Patent No. JP6652970B2, January 28, 2020, No. JP6964152B2, October 20, 2021.

M. Morgan and J. Fisher, "Statistical word boundary detection in serialized data streams," U.S. Patent No. 8,688,617, April 1, 2014. People's Republic of China Patent No. CN103141095B, February 15, 2017.

M. Morgan, "Reflectionless filters," U.S. Patent No. 8,392,495, March 5, 2013. People's Republic of China Patent No. CN102365784B, July 30, 2014.



OTHER PUBLICATIONS (see My Citations, ResearchGate)


Invited:

M. Morgan, "Reflectionless filter topologies," Wiley Encyclopedia of Electrical and Electronics Engineering, pp. 1-13, August 2019.

M. Morgan, "Planar reflectionless filters." In J. Hong, ed., Advances in Planar Filters Design, London: SciTech Publishing, 2019.

M. Morgan, "Think outside the band: design and miniaturization of absorptive filters," IEEE Microwave Magazine, vol. 19, no. 7, pp. 54-62, November 2018.

R. Setty, B. Kaplan, M. Morgan, and T. Boyd, "Combining MMIC reflectionless filters to create UWB bandpass filters," Microwave Journal, vol. 61, no. 3, pp. 60-72, March 2018.

M. Morgan, S. Wunduke, J. Castro, T. Boyd, and W. Groves, "Compact cm-wave and mm-wave integrated receivers," 32nd URSI General Assembly and Scientific Symposium, Montreal, August 2017.

A. Roshi, K. Warnick, J. Brandt, J. Fisher, B. Jeffs, P. Marganian, M. McLeod, M. Morgan, M. Mello, R. Norrod, W. Shillue, R. Simon, and S. White, "A 19 element cryogenic phased array feed for the Green Bank telescope," IEEE Intl. Symp. Antennas and Propagation and URSI CNC/USNC Joint Mtg., Vancouver, BC., Canada, July 19-25, 2015.

E. Bryerton, M. Morgan, and M. Pospieszalski, "Ultra low noise cryogenic amplifiers for radio astronomy," IEEE Radio Wireless Week, Austin, TX, January 2013.



Refereed:

M. Morgan, "A macroscopic field equation in spacetime algebra," 3rd URSI Atlantic Radio Science Meeting, Gran Canaria, Spain, June 2022.

S. Lakkimsetti, R. Kshetrimayum, and M. Morgan, "Broadband input quasi-reflectionless BPF and BSF for 5G applications," IEEE Asia-Pacific Microwave Conference, Brisbane, Australia, November 2021.

O. Ojeda, N. Denman, M. Morgan, J. Castro, J. Wegman, and S. Wunduke, "A scalable architecture for astronimical radio interferometers: the SCREAM project," IEEE Computer Society Annual Symposium on VLSI, Tampa, FL (virtual), July 2021.

A. Guilabert, M. Morgan, and T. Boyd, "Reflectionless filters for generalized elliptic transmission functions," IEEE Transactions on Circuits and Systems I, vol. 66, no. 12, pp. 4606-4618, December 2019.

M. Morgan, W. Groves, and T. Boyd, "Reflectionless filter topologies supporting arbitrary low-pass ladder prototypes," IEEE Transactions on Circuits and Systems I, vol. 66, no. 2, pp. 594-604, February 2019.

R. Selina, E. Murphy, M. McKinnon, A. Beasley, B. Butler, C. Carilli, B. Clark, A. Erickson, W. Grammer, J. Jackson, B. Kent, B. Mason, M. Morgan, O. Ojeda, W. Shillue, S. Sturgis, and D. Urbain, "The next generation very large array: a technical overview," SPIE Astronomical Telescopes and Instrumentation, Austin, TX, June 2018.

D. Anish Roshi, W. Shillue, B. Simon, K. F. Warnick, B. Jeffs, D. J. Pisano, R. Prestage, S. White, J. R. Fisher, M. Morgan, R. Black, M. Burnett, J. Diao, M. Ruzindana, V. van Tonder, L. Hawkins, P. Marganian, T. Chamberlin, J. Ray, N. M. Pingel, K. Rajwade, D. R. Lorimer, A. Rane, J. Castro, W. Groves, L. Jensen, J. D. Nelson, T. Boyd, and A. J. Beasley, "Performance of a highly-sensitive, 19-element, dual-polarization, cryogenic L-band phased-array feed on the Green Bank Telescope," The Astronomical Journal, vol. 155, no. 5, 18 pp., May 2018.

D. Roshi, W. Shillue, J. Fisher, M. Morgan, J. Castro, W. Groves, T. Boyd, B. Simon, L. Hawkins, V. van Tonder, J. Nelson, J. Ray, T. Chamberlain, S. White, R. Black, K. Warnick, B. Jeffs, and R. Prestage, "A highly-sensitive cryogenic phased array feed for the Green Bank Telescope," 32nd URSI General Assembly and Scientific Symposium, Montreal, August 2017.

W. Groves and M. Morgan, "A cryogenic SiGe low noise amplifier optimized for phased array feeds," Publications of the Astronomical Society of the Pacific., vol. 129, no, 978, July 2017.

M. Morgan, T. Boyd, and J. Castro, "Custom chipset and compact module design for a 75-110 GHz laboratory signal source," IOP Meas. Sci. Technol., vol. 27, no. 12, November 2016.

M. Morgan and T. Boyd, "A 10-100 GHz double-ridged horn antenna and coax launcher,"IEEE Trans. Antennas Propag., vol. 63, no. 8, August 2015.

M. Morgan and T. Boyd, "Reflectionless filter structures," IEEE Trans. Microw. Theory Techn., vol. 63, no. 4, pp. 1263-1271, April 2015.

R. Gawande, R. Reeves, L. Samoska, K. Cleary, A. Readhead, T. Gaier, P. Kangaslahti, M. Varonen, S. Church, K. Devaraj, M. Sieth, and M. Morgan, "W-band IQ sub-harmonic mixers with low LO power for cryogenic operation in large arrays," European Microwave Conference, Rome, Italy, October 2014.

D. Roshi, K. Warnick, J. Brandt, R. Fisher, P. Ford, B. Jeffs, P. Marganian, M. Mcleod, M. Morgan, R. Norrod, W. Shillue, R. Simon, and S. White, "Towards the development of a high-sensitivity cryogenic phased array feed," URSI General Assembly and Scientific Symposium, Beijing, China, August 2014.

M. Morgan, J. Fisher, and J. Castro, "Unformatted digital fiber-optic data transmission for radio astronomy front ends," Publications of the Astronomical Society of the Pacific, vol. 125, no. 928, pp. 695-704, June 2013.

M. Morgan and S. K. Pan, "Graphical prediction of trapped-mode resonances in sub-mm and THz waveguide networks," IEEE Trans. on Terahertz Science and Technology, vol. 3, no. 1, pp. 72-80, January 2013.

M. Morgan and S. K. Pan, "Graphical prediction of trapped-mode resonances in sub-mm and THz networks," 23rd Intl. Symposium on Space THz Technology, Tokyo, Japan, April 2012.

M. Morgan and T. Boyd, "Theoretical and experimental study of a new class of reflectionless filter," IEEE Trans. Microwave Theory Tech., vol. 59, no. 5, pp. 1214-1221, May 2011.

M. Morgan, J. Fisher, and T. Boyd, "Compact orthomode transducers using digital polarization synthesis," IEEE Trans. Microwave Theory Tech., vol. 58, no. 12, pp. 3666-3676, December 2010.

M. Morgan and J. Fisher, "Experiments with digital sideband-separating downconversion," Publications of the Astronomical Society of the Pacific, vol. 122, no. 889, pp. 326-335, March 2010.

M. Morgan, E. Bryerton, H. Karimy, D. Dugas, L. Gunter, K. Duh, X. Yang, P. Smith, and P.C. Chao, "Wideband medium power amplifiers using a short gate-length GaAs MMIC process,"IEEE MTT-S Intl. Microwave Symposium, Boston, MA, June 2009.

E. Bryerton, X. Mei, Y. Kim, W. Deal, W. Yoshida, M. Lange, J, Uyeda, M. Morgan, and R. Lai, "A W-band low-noise amplifier with 22K noise temperature,"IEEE MTT-S Intl. Microwave Symposium, Boston, MA, June 2009.

M. Morgan, T. Newton, R. Hayward, and T. Boyd, "Non-reflective transmission-line filters for gain slope equalization," IEEE MTT-S Intl. Microwave Symposium, Honolulu, HI, June 2007.

E. Bryerton, M. Morgan, D. Thacker, and K. Saini, "Maximizing signal-to-noise ratio in local oscillator chains for sideband-separating single-ended mixers," 18th Intl. Symp. on Space Terahertz Technology, Pasadena, CA, March 2007.

Y. Tang, N. Wadefalk, M. Morgan, and S. Weinreb, "Full Ka-band high performance InP MMIC LNA module," IEEE MTT-S Intl. Microwave Symposium, San Francisco, CA, June 2006.

E. Bryerton, K. Saini, M. Morgan, M. Stogoski, T. Boyd, and D. Thacker, "Development of electronically tuned local oscillators for ALMA," The Joint 30th Intl. Conf. on Infrared and Millimeter Waves and 13th Intl. Conf. on Terahertz Electronics, Williamsburg, VA, September 2005.

M. Morgan, E. Bryerton, P. Cesarano, T. Boyd, D. Thacker, K. Saini, and S. Weinreb, "A millimeter-wave diode-MMIC chipset for local oscillator generation in the ALMA telescope," IEEE MTT-S Intl. Microwave Symposium, Long Beach, CA, June 2005.

L. Samoska, E. Bryerton, M. Morgan, D. Thacker, K. Saini, T. Boyd, D. Pukala, A. Peralta, M. Hu, and A. Schmitz, "Medium power amplifiers covering 90-130 GHz for the ALMA telescope local oscillators," IEEE MTT-S Intl. Microwave Symposium, Long Beach, CA, June 2005.

M. Morgan and S. Weinreb, "Techniques for the integration of high-Q millimeter-wave filters in multi-function MMIC modules," Microwave Journal, vol. 48, no. 5, pp. 182-196, May 2005.

M. Morgan, N. Wadefalk, and S. Weinreb, "A wideband MMIC LNA for the 11 to 34 GHz band," URSI National Radio Science Meeting, Boulder, CO, January 2005.

J. Schulman, V. Kolinko, M. Morgan, C. Martin, J. Lovberg, S. Thomas III, J. Zinck, and Y. Boegeman, "W-band direct detection circuit performance with Sb-heterostructure diodes," Microwave and Wireless Components Letters, vol. 14, pp. 316-318, July 2004.

M. Morgan and S. Weinreb, "A W-band monolithic medium power amplifier," IEEE MTT-S Intl. Microwave Symp. Digest, pp. 133-136, Philadelphia, PA, 2003.

M. Morgan and S. Weinreb, "Octave-bandwidth high-directivity microstrip codirectional couplers," IEEE MTT-S Intl. Microwave Symp. Digest, pp. 1227-1230, Philadelphia, PA, 2003.

M. Morgan and S. Weinreb, "A millimeter-wave perpendicular coax-to-microstrip transition," IEEE MTT-S Intl. Microwave Symp. Digest, pp. 817-820, Seattle, WA, 2002.

M. Morgan, S. Weinreb, N. Wadefalk, and L. Samoska, "A MMIC-based 75-110 GHz signal source," IEEE MTT-S Intl. Microwave Symp. Digest, pp. 1859-1862, Seattle, WA, 2002.

K. Lin, H. Wang, M. Morgan, T. Gaier, and S. Weinreb, "A W-Band GCPW MMIC diode tripler," 32nd European Microwave Conference, Milan, 2002.

J. Schulman, S. Thomas, D. Chow, E. Croke, H. Dunlap, K. Holabird, W. Clark, and M. Morgan, "High frequency performance of Sb-heterostructure millimeter-wave diodes," 14th Indium Phosphide and Related Materials Conference, Stockholm, 2002.

J. Schulman, J. Zinck, S. Skeith, S. Thomas, D. Chow, E. Croke, H. Dunlap, K. Holabird, M. Morgan, and S. Weinreb, "Physics of Sb-heterostructure quantum tunneling millimeter-wave diodes," 44th Electron Materials Conference, Santa Barbara, CA, 2002.

V. Radisic, M. Micovic, M. Hu, P. Janke, C. Ngo, L. Nguyen, L. Samoska, and M. Morgan, "164-GHz MMIC HEMT doubler," IEEE Microwave and Wireless Components Letters, vol. 11, pp. 241-243, June 2001.

E. Croke, J. Schulman, D. Chow, H. Dunlap, K. Holabird, M. Morgan, and S. Weinreb, "New tunnel diode for zero-bias direct detection for millimeter-wave imagers," SPIE Intl. Symp. on Aerospace/Defense Sensing, Simulation, and Controls, Orlando, FL, 2001.

M. Morgan and S. Weinreb, "A full waveguide band MMIC tripler for 75-110 GHz," IEEE MTT-S Intl. Microwave Symp. Digest, pp. 103-106, Phoenix, AZ, 2001.

M. Morgan and S. Weinreb, "A monolithic HEMT diode balanced mixer for 100-140 GHz," IEEE MTT-S Intl. Microwave Symp. Digest, pp. 99-102, Phoenix, AZ, 2001.



Non-Refereed:

P. Draxler and M. Morgan, "IMS2024 Interactive Forum - Washington, DC.," Microwave Magazine, TBD.

M. Morgan, "Collected Transmission-Line Identities," NRAO Electronics Division Internal Report, no. 332, October 31, 2023.

M. Morgan, "Downconversion and digitization methodology for ngVLA," ngVLA Electronics Memo, no. 1, January, 2020.

R. Shrotriya and M. Morgan, "Filtering without reflections: flattening multiplier chain conversion efficiency & more," Microwave Journal White Paper, September 2019.

M. Morgan, "A better way to filter -- part I," NRAO Blog, March 29, 2018.

M. Morgan and S. Wunduke, "An integrated receiver concept for the ngVLA," ngVLA Memo #29, November 2017.

B. Kaplan, M. Morgan, and T. Boyd, "Combining MMIC reflectionless filters to create ultra-wideband (UWB) bandpass filters," New-Tech Europe Magazine, pp. 30-37, October 2017.

M. Morgan, "Dual-mode propagation in triangular and triple-ridged waveguides," Electronics Division Technical Note #218, February 2011.

M. Morgan, "Active cascade local oscillator distribution for large arrays," Electronics Division Technical Note #216, October 2010.

J. Fisher and M. Morgan, "Prototyping algorithms for next-generation radio astronomy receivers using PXI-based instruments and high-speed streaming," National Instruments Case Study, June 2010.

M. Morgan and J. Fisher, "Word-boundary detection in a serialized, Gaussian-distributed, white-noise data stream," Electronics Division Technical Note #213, October 2009.

M. Morgan and J. Fisher, Next Generation Radio Astronomy Receiver Systems, Astro2010 Technology Development White Paper, March 2009.

J. Fisher, R. Bradley, W. Brisken, W. Cotton, D. Emerson, A. Kerr, R. Lacasse, M. Morgan, P. Napier, R. Norrod, J. Payne, M. Pospieszalski, A. Symmes, A. Thompson, and J. Webber, Large Instrument Development For Radio Astronomy, Astro2010 Technology Development White Paper, March 2009.

K. O'neil, J. Lockman, J. Ford, M. Morgan, J. Fisher, and B. Mason, Comets to Clusters: Wide-Field Multi-Pixel Camera Development for the GBT, Astro2010 Notice of Interest White Paper, March 2009.

M. Morgan and J. Fisher, "Simplifying radio astronomy receivers," NRAO eNews, vol. 2, no. 3, March 2009

J. Fisher and M. Morgan, "Analysis of a single-conversion, analog/digital sideband separating mixer prototype," Electronics Division Internal Report #320, June 2008.

C. Chandler, W. Brisken, B. Butler, R. Hayward, M. Morgan, and B. Willoughby, "A proposal to design and implement a compact water vapour radiometer for the EVLA," EVLA Memo #74, July 2004.

R. Hayward, M. Morgan, and K. Saini, "A gain slope correction scheme for the EVLA receiver system," EVLA Memo #80, July 2004.



Dissertation:

M. Morgan, Millimeter-Wave MMICs and Applications, Ph. D. Thesis, California Institute of Technology, May 2003.



CONFERENCE PRESENTATIONS

M. Morgan, "Coupled-ladder reflectionless filters," IEEE Latin American Microwave Conference, Invited Talk, San Jose, Costa Rica, December, 2023.

M. Morgan, "Compact Radio Astronomy Receiver Technology," UVa Link Lab Research Day, Charlottesville, VA, October 14, 2022.

M. Morgan, "Microwave instrumentation in radio astronomy," 10th Intl. Conference on Internet of Everything, Microwave Engineering, Communications, and Networks, Keynote Address, Univ. of Engr. and Mgmt., Jaipur, India (virtual), December 1, 2021.

M. Morgan, "Novel integrated receiver concepts for radio astronomy at the National Radio Astronomy Observatory," IEEE Texas Symposium on Wireless & Microwave Circuits and Systems, Houston (virtual), May 2021.

M. Morgan, "Coupled-ladder topologies for reflectionless filters," IEEE Radio Wireless Week, San Diego (virtual), January 2021.

J. Castro, M. Morgan, J. Ford, and V. van Tonder, "Digital sideband separating downconversion for the Green Bank Telescope phased array feed," URSI National Radio Science Mtg., Boulder, CO, January 2016.

M. Morgan, "The MMIC frontier for radio astronomy," URSI National Radio Science Meeting, Boulder, CO, January 2012.

M. Morgan, S. White, J. Lockman, E. Bryerton, K. Saini, R. Norrod, R. Simon, S. Srikanth, G. Anderson, and D. Pisano, "A K-band spectroscopic focal plane array for the Robert C. Byrd Green Bank radio telescope," URSI General Assembly, Chicago, IL, August 2008.

M. Morgan, "NRAO MMIC based receiver developments for the next decade of radio astronomy," Keck Institute for Space Studies MMIC Array Receivers and Spectrographs Workshop, Pasadena, CA, July 2008.

M. Morgan, "Compact integrated receivers using MMIC technology," China-US Bilateral Workshop on Radio Astronomy, Beijing, China, April 2008.

M. Morgan, "Custom GaAs and InP components for radio astronomy," IEEE Compound Semiconductor IC Symp., Palm Springs, CA, November 2005.



COLLOQUIA

"Integrated Receiver Development," Harvard-Smithsonian CfA Special Colloquium, Cambridge, MA, January 31, 2024.

"Intellectual Property (IP) Development and Management," Harvard-Smithsonian CfA Seminar, Cambridge, MA, January 31, 2024.

"Reflectionless Filters and Diplexers," Harvard-Smithsonian CfA Receiver Lab Lunch Talk, Cambridge, MA, October 19, 2022.

"Principles of Reflectionless Filters," Haystack Colloquium Series, Westford, MA, July 21, 2022.

"Novel Integrated Receiver Concepts for Radio Astronomy," Boeing Webinar, Seattle, WA, February 10, 2021.

"Analog-Digital-Photonic Receivers for Radio Astronomy," JBCA Virtual Colloquium, Jodrell Bank, November 4, 2020.

"Progress on the SADC and Unformatted Serial Link," Green Bank Technology Update, Green Bank, October 8, 2020.

"Principles of Reflectionless Filters," UEM Jaipur IEEE Eminent Foreign Lecture Webinar, Jaipur, India, July 20, 2020.

"Principles of Reflectionless Filters," UVa ECE Department Seminar, February 8, 2019.

"Reconstructing a Cosmic Timeline," Piedmont Virginia Community College Family Space Exploration Event, Charlottesville, VA, November 11, 2017.

"Radio Astronomy," Piedmont Virginia Community College Family Space Exploration Event, Charlottesville, VA, February 18, 2017.

"Technology for Radio Astronomy," Piedmont Virginia Community College Math Club, Charlottesville, VA, April 13, 2016.

"Unformatted Serial Data Transfer,"Tech Seminar Series, National Reconnaissance Office, Chantilly, VA, November 6, 2014.

"Engineering for Radio Astronomy at the NRAO Central Development Lab," Colloquium for IEEE Student Chapter at UVA, University of Virginia, Charlottesville, VA, April 10, 2014.

"Integrated Receiver Development at the NRAO Central Development Lab," University of Massachusetts Seminar, University of Massachusetts, Amherst, MA, November 28, 2012.

"Compact Integrated Receiver Development at the CDL," AUI Board of Trustees Meeting., Madison Hotel, Washington, DC, February 18, 2011.

"From Feed to Fiber - Compact Integrated Receiver Development at the CDL," Green Bank Colloquium, Green Bank, WV, December 15, 2010. New Mexico Colloquium, Socorro, NM, July 27, 2010. TUNA Talk, Charlottesville, VA, May 18, 2010.