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Publications
(Organized by Subject Area)

Frequency Mixers and Multipliers

• Shan He and C. E. Saavedra, "An Ultra-Low-Voltage and Low-Power x2 Subharmonic Downconverter Mixer," accepted in the IEEE Transactions on Microwave Theory and Techniques.
• Stanley S. K. Ho and C. E. Saavedra, "A Low-Noise Self-Oscillating Mixer using a Balanced VCO Load," IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 58, no. 8, pp. 1705-1712, August 2011. (pdf file)
• J. Xu, C. E. Saavedra and G. Chen, "A 12 GHz-Bandwidth CMOS Mixer with Variable Conversion Gain Capability" IEEE Microwave and Wireless Component Letters, vol. 21, no. 10, pp. 565-567, 2011. (pdf file)
• J. Xu, C. E. Saavedra and G. Chen, "A CMOS wideband front-end chip using direct RF sampling mixer with embedded discrete-time filtering," Journal of Semiconductors, vol. 32, no. 8, pp. 1-8, Aug. 2011. (pdf file)
• Stanley S. K. Ho and C. E. Saavedra, "A 5.4 GHz Fully Integrated Low-Noise Mixer" Journal of Integrated Circuits and Systems,  
  Invited Paper, vol. 6, no. 1, pp. 18-24, 2011. (pdf file)
• M. Wang and C. E. Saavedra, "Reconfigurable Broadband Mixer with Variable Conversion Gain," IEEE International Microwave Symposium, Baltimore, USA, June 2011. (pdf file)
• M. Wang and C. E. Saavedra, "Fully Monolithic Single-Sideband Mixer with Sideband Selection" IEEE International Microwave Symposium, Baltimore, USA, June 2011. (pdf file)
• Stanley S. K. Ho and C. E. Saavedra, "A CMOS Broadband Low-Noise Mixer with Noise Cancellation" IEEE Transactions on Microwave Theory and Techniques, Vol. 58, No. 5, pp. 1126-1132, May 2010. (pdf file).
  The paper above was one of the Top 100 Documents accessed in the IEEE Xplore Digital Library in May 2010 (# 41), was was the #1 downloaded paper in the IEEE MTT Transactions in May 2010.
• Zhiyu Ru, E. Klumperink, C. E. Saavedra, and B. Nauta, "A Tunable 300-800 MHz RF-Sampling Receiver Achieving 60 dB Harmonic Rejection and 0.8 dB Minimum NF in 65 nm CMOS," IEEE Journal of Solid-State Circuits, Vol. 45, No. 5, pp. 967-978, May 2010. (pdf file).
  The paper above was one of the Top 100 Documents accessed in the IEEE Xplore Digital Library in May 2010 (# 15).
  
• B. R. Jackson and C. E. Saavedra, "A Dual-Band Self-Oscillating Mixer for C-Band and X-Band Applications," IEEE Transactions on Microwave Theory and Techniques, Vol. 58, No. 2, pp. 318-323, February 2010. (pdf file)
• C. E. Saavedra, "Frequency Multiplier Design Techniques and Applications" in Integrated Microsystems and Nanotechnology: MEMs, Biological and Photonics Interfaces, Edited by K. Iniewski, CRC Press, to appear in 2011.
• B. R. Jackson, F. Mazzilli and C. E. Saavedra, "A Frequency Tripler using a Subharmonic Mixer and Fundamental Cancellation," IEEE Transactions on Microwave Theory and Techniques, Vol. 57, No. 5, pp. 1083-1090, May 2009. (pdf file)
• Stanley S. K. Ho and C. E. Saavedra, "A 5.4 GHz Fully Integrated Low-Noise Mixer," 23^rd Symposium on Integrated Circuits and Systems Design (SBCCI), pp.14-17, São Paulo, Brazil, September 2010. (pdf file)
• Z. Ru, E. Klumperink, C. E. Saavedra and B. Nauta, “A Tunable 300-800 MHz RF-Sampling Receiver Achieving 60 dB Harmonic Rejection and 0.8 dB Minimum NF in 65 nm CMOS,” IEEE Radio Frequency Integrated Circuits (RFIC)  Symposium, pp. 21-24, Boston, USA, June 2009. (pdf file)
• S. S. K. Ho and C. E. Saavedra, “Frequency Doubler Employing Active Fundamental Cancellation,” IEEE Sarnoff Symposium, Princeton, New Jersey, USA, April 2009. (pdf file)
• A. M. El-Gabaly and C. E. Saavedra, "A Compact Tunable 5 GHz-Band Quadrature Downconverter with an integrated 90° Phase Shifter and Balun," URSI General Assembly, Paper Number: DP2.3 Chicago, USA, August 2008. (pdf file)
• B. R. Jackson and C. E. Saavedra, "A CMOS Ku Band 4x Subharmonic Mixer," IEEE Journal of Solid-State Circuits, Vol. 43, No. 6, pp. 1351-1359, June 2008. (pdf file)
• You Zheng and C. E. Saavedra, "A Bipolar MMIC Frequency Tripler," IEEE Int. Carib. Conf. Devices, Circuits, and Systems, Cancun, Mexico, April 2008. (pdf file)
• You Zheng and C. E. Saavedra, "A Broadband CMOS Frequency Tripler using a Third-Harmonic Enhanced Technique," IEEE Journal of Solid-State Circuits, Vol. 42, No. 10, pp. 2197-2203, 2007. (pdf file)
• B. R. Jackson and C. E. Saavedra, "A CMOS Subharmonic Mixer with Input and Output Active Baluns," Microwave and Optical Technology Letters, Vol. 48, No. 12, pp. 2472-2478, December 2006. (pdf file)
• B. R. Jackson and C. E. Saavedra, “An L-Band Frequency Doubler using a Time-Delay Technique,” IEEE Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF), pp. 131-134, San Diego, California, USA, January 2006. (pdf file)
• C. E. Saavedra and Yang Zhang, "A Clock Frequency Doubler using a Passive Integrator and Emitter-Coupled Comparator Circuit," IEEE Canadian Conference on Electrical and Computer Engineering, pp. 137-140, Niagara Falls, Canada, May 2004.

Operational Transconductance Amplifiers (OTA's) for Gigahertz Applications

• J. Xu, C. E. Saavedra and G. Chen, "An Active Inductor-Based VCO with Wide Tuning Range and High DC-to-RF Power Effciency," IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 58, no. 8, pp. 462-466, August 2011. (pdf file)- - The above paper was the #1 downloaded paper in the IEEE TCAS-II for the month of August 2011.
• J. Xu, C. E. Saavedra and G. Chen, "A 12 GHz-Bandwidth CMOS Mixer with Variable Conversion Gain Capability" accepted in IEEE Microwave and Wireless Component Letters. (pdf file)
• J. Xu, C. E. Saavedra and G. Chen, "5.4 GHz Reconfigurable Quadrature Amplitude Modulator using Very High-Speed OTA's," IEEE International Microwave Symposium, Baltimore, USA, June 2011. (pdf file)
• You Zheng and C. E. Saavedra, "Full 360º Vector-Sum Phase Shifter for Microwave System Applications," IEEE Transactions on Circuits and Systems I: Regular Papers, Vol. 57, No. 4, pp. 752-758, April 2010. (pdf file)
• J. Xu, C. E. Saavedra, and G. Chen, "Wideband Microwave OTA with Tunable Transconductance using Feedforward Regulation and an Active Inductor Load," IEEE NEWCAS Conference, pp. 93-96, Montréal, Canada, June 2010. (pdf file)
• You Zheng and C. E. Saavedra, "Frequency Response Comparison of Two Active Inductor Topologies," Progress in Electromagnetics Research Letters, Vol. 13, pp. 113-119, January 2010. (pdf file)
• You Zheng and C. E. Saavedra, "A Variable Gain Amplifier using a Very High-Speed OTA," Microwave and Optical Technology Letters, Vol. 52, No. 5, pp. 1112-1116, May 2010. (pdf file)
• Gideon Yong and C. E. Saavedra, "A Wideband Quadrature Generator IC using a Varactor-Compensated Feedback Network," Analog Integrated Circuits and Signal Processing, Vol. 63, No. 2, pp. 161-167, 2010. (pdf file)
• You Zheng and C. E. Saavedra, "Active Quasi-Circulator MMIC using OTA's"  IEEE Microwave and Wireless Components Letters, Vol. 19, No. 4, pp. 218-220, April 2009. (pdf file)
• Gideon Yong and C. E. Saavedra, "A Fully Integrated S-Band Vector Phase Shifter in CMOS Technology," IEEE Topical Meeting on Silicon Monolithic Circuits in RF Systems (SiRF), pp. 45-48, San Diego, California, 2009. (pdf file)
• Gideon Yong and C. E. Saavedra, “A Wideband Feedback Compensated Quadrature Generator,”  IEEE Sarnoff Symposium, Princeton, New Jersey, USA, April 2009. (pdf file)
• C. E. Saavedra and Wei Yang, “2 GHz Active Bandstop Filter using Operational Transconductance Amplifiers,” XV IBERCHIP Workshop, pp. 477-480, Buenos Aires, Argentina, March 2009. (pdf file)
• You Zheng and C. E. Saavedra, "Feedforward-Regulated Cascode OTA for Gigahertz Applications," IEEE Transactions on Circuits and Systems I: Regular Papers, Vol. 55, No. 12, pp. 3373-3382, Dec. 2008. (pdf file)
• You Zheng and C. E. Saavedra, "An Ultra-Compact CMOS Variable Phase Shifter for 2.4 GHz ISM Applications,"  IEEE Transactions on Microwave Theory and Techniques, Vol. 56, No. 6, pp. 1349-1354, June 2008. (pdf file)
• You Zheng and C. E. Saavedra, "Ultra-Compact MMIC Active Bandpass Filter with a Wide Tuning Range," Electronics Letters, Vol. 44, No. 6, pp. 424-425, March 2008. (pdf file)
• You Zheng and C. E. Saavedra, "A Microwave OTA using a Feedforward-Regulated Cascade Topology," IEEE International Symposium on Circuits and Systems (ISCAS), pp. 1887-1890, New Orleans, USA, May 2007. (pdf file)

Amplifiers, Oscillators and specialized Signal Generators

• A. M. El-Gabaly and C. E. Saavedra, "2-Watt Broadband GaN Power Amplifier RFIC using the fT Doubling Technique" accepted in the 2012 IEEE International Microwave Symposium, Montréal, Canada.
• A. M. El-Gabaly and C. E. Saavedra, "Broadband Low Noise Amplifier with Fast Power Switching for 3.1–10.6 GHz Ultra-Wideband Applications," IEEE Transactions on Microwave Theory and Techniques, vol. 59, no. 12, pp. 3146-3153, December 2011. (pdf file)
  
• A. M. El-Gabaly and C. E. Saavedra, "A Quadrature  Pulse Generator for Short-Range UWB Vehicular Radar Applications using a Pulsed Oscillator and a Variable Attenuator," IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 58, no. 10, pp. 2285-2295, October 2011. (pdf file)
• J. Xu, C. E. Saavedra and G. Chen, "An Active Inductor-Based VCO with Wide Tuning Range and High DC-to-RF Power Efficiency," IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 58, no. 8, pp. 462-466, August 2011. (pdf file)
  
• A. M. El-Gabaly and C. E. Saavedra, "An Energy-Efficient Tunable Pulse Generator for 3.1–10.6 GHz UWB Applications Using a Variable Attenuator for Pulse Shaping", accepted in International Journal of Circuit Theory and Applications  (Wiley InterScience), (pdf file)
• M. Wang and C. E. Saavedra, "Very Low Frequency Tunable Signal Generator for Neural and Cardiac Cell Stimulation" International Journal of Electronics (Taylor & Francis),  vol. 98, no. 9, pp. 1215-1227, Sept. 2011.  (pdf file)
• A. M. El-Gabaly and C. E. Saavedra, "Wideband Variable Gain Amplifier with Noise Cancellation," Electronics Letters, Vol. 47, No. 2, pp. 116-117, January 2011. (pdf file)
• A. M. El-Gabaly and C. E. Saavedra, "A 24 GHz Quadrature Pulsed Oscillator for Short-Range UWB Vehicular Radar Applications," IEEE International Symposium on Circuits and Systems (ISCAS), pp.1283-1286, Rio de Janeiro, Brazil, May 2011.
• Shan He and C. E. Saavedra, "A 19 - 26 GHz Balanced Amplifier in 130 nm CMOS Technology" accepted in the IEEE Sarnoff Symposium, Princeton, New Jersey, May 2011.
• A. M. El-Gabaly and C. E. Saavedra, "A 5 GHz Energy-Efficient Tunable Pulse Generated for UWB Applications using a Variable Attenuator for Pulse Shaping," accepted in the International Journal of Circuit Theory and Applications (Wiley).
• B. R. Jackson and C. E. Saavedra, "A Dual-Band Self-Oscillating Mixer for C-Band and X-Band Applications," IEEE Transactions on Microwave Theory and Techniques, Vol. 58, No. 2, pph. 318-323, February 2010. (pdf file)
• B. R. Jackson and C. E. Saavedra, "A CMOS Amplifier with Third-Order Intermodulation Distortion Cancellation," IEEE Topical Meeting on Silicon Monolithic Circuits in RF Systems (SiRF), pp. 217-220, San Diego, CA, 2009. (Abstract) 
  Best Student Paper Award.  
• A. M. El-Gabaly and C. E. Saavedra, "A Low-Voltage Fully Integrated 5 GHz Low Noise Amplifier in 0.18 μm CMOS,"
  URSI General Assembly, Paper Number: DP1.8, Chicago, USA, August 2008. (pdf file)
  
• B. R. Jackson and C. E. Saavedra, "A 3 GHz CMOS Quadrature Oscillator Using Active Superharmonic Coupling," European Microwave Conference and European Microwave Integrated Circuits Conference, pp. 1109-1112, Munich, Germany, October 2007. (pdf file)
• You Zheng and C. E. Saavedra, "Compact CMOS VCO using a Transistor for Frequency Control," ANTEM/URSI International Symposium on Antenna Technology and Applied Electromagnetics, pp. 115-118, Montréal, Canada, July 2006. (pdf file)

Active Circulators and Quasi-Circulators

• C. E. Saavedra and Stanley Ho, "Optical Quasi-Circulator using Power Couplers and Optical Amplifiers," IEEE Photonics Technology Letters, Vol. 22, No. 9, 604-606, May 2010. (pdf file)
• You Zheng and C. E. Saavedra, "Active Quasi-Circulator MMIC using OTA's"  IEEE Microwave and Wireless Components Letters, Vol. 19, No. 4, pp. 218-220, April 2009. (pdf file)
• You Zheng and C. E. Saavedra, "An Ultra-Compact CMOS Variable Phase Shifter for 2.4 GHz ISM Applications,"  IEEE Transactions on Microwave Theory and Techniques, Vol. 56, No. 6, pp. 1349-1354, June 2008.
• C. E. Saavedra and You Zheng, "Active Quasi-Circulator Realization with Gain Elements and Slow-Wave Couplers," IET Microwaves, Antennas and Propagation, Vol. 1, No. 5, pp. 1020-1023, 2007. (pdf file)

Modulators and Demodulators

• J. Xu, C. E. Saavedra and G. Chen, "5.4 GHz Reconfigurable Quadrature Amplitude Modulator using Very High-Speed OTA's," IEEE International Microwave Symposium, Baltimore, USA, June 2011. (pdf file)
• A. M. El-Gabaly and C. E. Saavedra, "Compact Low-Power 2.4 GHz QPSK Modulator in CMOS," Microwave and Optical Technology Letters, Vol.51, No. 5, pp. 1344-1348, May 2009. (pdf file)
• B. R. Jackson and C. E. Saavedra, “2.4 GHz Direct-Digital Binary Phase Shift Keying Modulator using a MEMS Switch,” Electronics Letters, Vol. 40, No. 24, pp. 1539-1540, Nov. 2004. (pdf file)
• You Zheng and C. E. Saavedra, "Coherent BPSK Demodulator MMIC using an Anti-Parallel Synchronization Loop,"
  IEEE Radio Frequency Integrated Circuits (RFIC) Symposium, pp. 657-660, Honolulu, Hawaii, 2007. (pdf file)
• A. M. El-Gabaly, B. R. Jackson, and C. E. Saavedra, "An L-Band Direct-Digital QPSK Modulator in CMOS," URSI International Symposium on Signals, Systems, and Electronics (ISSSE), pp. 563-566, Montréal, Canada, July 2007. (pdf file)
• B. R. Jackson, You Zheng and Carlos E. Saavedra, "A CMOS Direct-Digital BPSK Modulator using an Active Balun and Common-Gate Switches," IEEE International Symposium on Circuits and Systems (ISCAS), pp. 2534-2537, New Orleans, USA, May 2007. (pdf file)
• C. E. Saavedra and You Zheng, "A BPSK Modulator using a Ring Hybrid and HFET Switches," IEICE/IEEE Asia-Pacific Microwave Conference, pp. 1665-1668, Yokohama, Japan, December 2006. (pdf file)
• B. R. Jackson and C. E. Saavedra, “Frequency Shift Keying (FSK) Modulator using a MEMS Switch,” XII IBERCHIP Workshop, pp. 234-237, San José, Costa Rica, March 2006.
• You Zheng and C. E. Saavedra, “A Pulse-Width Modulator using a Phase-Locked Loop Variable Phase Shifter,” IEEE International Symposium on Circuits and Systems (ISCAS), pp. 3639-3642, Kobe, Japan, May 2005. (pdf file)
• You Zheng and C. E Saavedra, “A BPSK Demodulator Circuit using an Anti-Parallel Synchronization Loop,” IEEE International Symposium on Circuits and Systems (ISCAS),pp. 5433-5436, Kobe, Japan, May 2005. (pdf file)
• A. Tan and C. E. Saavedra, “A Binary Phase Shift Keying Demodulator using Pulse Detection,” IEEE International Conference on Electrical and Electronics Engineering, pp. 49-52, September 2004. (pdf file)
• C. E. Saavedra, M. J. Vaughan, and R. C. Compton, “An M-PSK Modulator for Quasi-Optical Wireless Array Applications,” IEEE International Microwave Symposium Digest, pp. 1243-1246, 1996. (pdf file)

Filters

• You Zheng and C. E. Saavedra, "Ultra-Compact MMIC Active Bandpass Filter with a Wide Tuning Range," Electronics Letters, Vol. 44, No. 6, pp. 424-425, March 2008. (pdf file)
• C. E. Saavedra, "Microstrip Multiplexer with Compact In-Line Feed Structure," Microwave and Optical Technology Letters, Vol. 49, No. 12, pp. 3128-3130, 2007. (pdf file)
• Joseph Fraresso and C.E. Saavedra, “Narrowband Bandpass Filter Exhibiting Harmonic Suppression,” Electronics Letters, Vol. 39, No. 16, pp. 1189-1190, August 2003. (pdf file)
• C. E. Saavedra, “A Microstrip Ring Resonator using Quarter Wave Couplers,” Electronics Letters, Vol. 37, No. 11, pp.694-695, May 2001. (pdf file)
• B. R. Jackson and C. E. Saavedra, “Variable MEMS Capacitors for Millimeter-Wave Integrated Circuit Filtering Applications,” XV IBERCHIP Workshop, pp. 467-470, Buenos Aires, Argentina, March 2009. (pdf file)
• C. E. Saavedra, "Diplexer using a Circulator and Interchangeable Filters," IEEE Int. Carib. Conf. Devices, Circuits, and Systems, Cancun, Mexico, April 2008. (pdf file)
• C. E. Saavedra, “Reconfigurable Bandpass Filter Structure using an SPDT MEMS Switch,” European Microwave Conference (EuMC),pp. 557-560, Paris, France, October 2005. (pdf file)
• G. F. Perez-Sanchez, A. Morales-Acevedo, B. R. Jackson, and C. E. Saavedra, "Thin Film Bulk Acoustic Wave Resonators for their Application in Microwave Filters," IEEE Int. Conf. on Electrical and Electronics Eng., pp. 353-356, Mexico City, Mexico, September 2007.
  
• C. E. Saavedra, A. Morales-Acevedo, B. R. Jackson, “Microwave Bandpass Filters using Zinc Oxide Resonator Membranes,” XIV International Materials Research Congress, Cancún, México, August 2005. (Poster)
• C. E. Saavedra, “Compact Low-Pass Filter using a Slow-Wave Structure,” 45th IEEE Midwest Symposium on Circuits and Systems, Tulsa, Oklahoma, USA, August 2002.
• J. Sewter and C. E. Saavedra, “Microstrip Ring Resonator using Slow Wave Structure Exhibiting Harmonic Suppression,” International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM), Montréal, Canada, pp. 153-155, July 2002. (pdf file)

Phase Shifters and Phase Control

• You Zheng and C. E. Saavedra, "Full 360º Vector-Sum Phase Shifter for Microwave System Applications," IEEE Transactions on Circuits and Systems I: Regular Papers, to appear in 2010. (pdf file)
• Gideon Yong and C. E. Saavedra, "A Fully Integrated S-Band Vector Phase Shifter in CMOS Technology," IEEE Topical Meeting on Silicon Monolithic Circuits in RF Systems (SiRF), pp. 45-48, San Diego, California, 2009. (pdf file)
• Gideon Yong and C. E. Saavedra, “A Wideband Feedback Compensated Quadrature Generator,”  IEEE Sarnoff Symposium, Princeton, New Jersey, USA, April 2009. (pdf file)
• You Zheng and C. E. Saavedra, "An Ultra-Compact CMOS Variable Phase Shifter for 2.4 GHz ISM Applications,"  IEEE Transactions on Microwave Theory and Techniques, Vol. 56, No. 6, pp. 1349-1354, June 2008. (pdf file)
• Gideon Yong and C. E. Saavedra, "A Compact Capacitor-Compensated Wideband Balun in CMOS Technology," 24th Biennial Symposium on Communications, pp. 306-309, Kingston, Ontario, Canada, June 2008. (pdf file)
• Yang Zhang and C. E. Saavedra, “A Voltage-Variable Time Delay Element for Random Bit Waveforms,” IEEE ICCDCS, Punta Cana, Dom. Republic, pp. 183-187, November 2004. (pdf file)
• Yang Zhang and C. E. Saavedra, ”A Nonoverlapping Clock Generator Circuit using Bipolar Differential Pairs,” IEEE ICCDCS, Punta Cana, Dom. Republic, pp. 330-333, November 2004. 
• You Zheng and C. E. Saavedra, “A 0 ° to 180 ° Variable Phase Shifter using Frequency Multiplication,” IEEE International Conference on Electrical and Electronics Engineering, pp. 601-604, September 2004.
• Yang Zhang and C. E. Saavedra, "A Voltage-Variable Time Delay Element for Clock Waveforms," IEEE Canadian Conference on Electrical and Computer Engineering, pp. 551-554, Niagara Falls, Canada, May 2004.

Frequency Dividers

• C. E. Saavedra, “A Microwave Frequency Divider using an Inverter Ring and Transmission Gates,” IEEE Microwave and Wireless Components Letters, Vol. 15, No. 5, pp. 330-332, May 2005. (pdf file)
• C. E. Saavedra, “A Microwave Divide-by-Four Frequency Divider using an Inverter Ring,” 22nd Biennial Symposium on Communications, pp. 418-420, Kingston, Canada, June 2004.
• C. E. Saavedra, “A Frequency Divider with Variable Division Ratio,” IEEE International Conference on Electrical and Electronics Engineering, pp. 605-609, September 2004.

Phase Locked Loops and related circuits

• Gideon Yong and C. E. Saavedra, "A Wideband Quadrature Generator IC using a Varactor-Compensated Feedback Network," Analog Integrated Circuits and Signal Processing, Vol. 63, No. 2, pp. 161-167, 2010. (pdf file)
• Gideon Yong and C. E. Saavedra, "A Fully Integrated S-Band Vector Phase Shifter in CMOS Technology," IEEE Topical Meeting on Silicon Monolithic Circuits in RF Systems (SiRF), pp. 45-48, San Diego, California, 2009. (pdf file)
• You Zheng and C. E. Saavedra, "Coherent BPSK Demodulator MMIC using an Anti-Parallel Synchronization Loop,"
  IEEE Radio Frequency Integrated Circuits (RFIC) Symposium, pp. 657-660, Honolulu, Hawaii, 2007. (pdf file)
• You Zheng and C. E. Saavedra, “A Pulse-Width Modulator using a Phase-Locked Loop Variable Phase Shifter,” IEEE International Symposium on Circuits and Systems (ISCAS), pp. 3639-3642, Kobe, Japan, May 2005. (pdf file)
• You Zheng and C. E Saavedra, “A BPSK Demodulator Circuit using an Anti-Parallel Synchronization Loop,” IEEE International Symposium on Circuits and Systems (ISCAS),pp. 5433-5436, Kobe, Japan, May 2005. (pdf file)
• C. E. Saavedra, M. J. Vaughan, and R. C. Compton, “An M-PSK Modulator for Quasi-Optical Wireless Array Applications,” IEEE International Microwave Symposium Digest, pp. 1243-1246, 1996. (pdf file)

Attenuators

• C. E. Saavedra and B. R. Jackson, "Voltage-Variable Attenuator MMIC using Phase Cancellation," IEE Proceedings Circuits, Devices, and Systems, Vol. 153, No. 5, pp. 442-446, October 2006. (pdf file)
• C. E. Saavedra and You Zheng, “Ring-Hybrid Microwave Voltage-Variable Attenuator using HFET Transistors,”  IEEE Transactions on Microwave Theory and Techniques, Vol. 53, No. 7, pp. 2430-2434, July 2005. (pdf file)
• You Zheng and C. E. Saavedra, "A Bipolar Voltage Variable Attenuator for Radio Frequency Applications," IEEE Canadian Conference on Electrical and Computer Engineering, pp. 95-98, Niagara Falls, Canada, May 2004. (pdf file)

Spatial Power Combining

• C. E. Saavedra, W. Wright, and R. C. Compton, “A Circuit, Waveguide, and Spatial Power Combiner for Millimeter-Wave Amplification,” IEEE Transactions on Microwave Theory and Techniques, Vol. 47, pp. 605-613, May 1999. (pdf file)
  
• C. E. Saavedra, W. Wright, K. Y. Hur, and R. C. Compton, “A Millimeter-Wave Quasi-Optical Amplifier Array using Inclined-Plane Horn Antennas,” IEEE Microwave and Guided Wave Letters, Vol. 8, pp. 81-83, February 1998. (pdf file)
• C. E. Saavedra, W. Wright, and R. C. Compton, “A passive horn structure with transitions to microstrip for quasi-optical amplifier arrays,” SPIE Proceedings, vol. 3465, pp. 373-382, San Diego, California, July 1998. (pdf file)
• C. E. Saavedra, M. J. Vaughan, and R. C. Compton, “An M-PSK Modulator for Quasi-Optical Wireless Array Applications,” IEEE International Microwave Symposium Digest, pp. 1243-1246, 1996. (pdf file)

Semiconductor Devices

• G. F. Perez-Sanchez, A. Morales-Acevedo, B. R. Jackson, and C. E. Saavedra, "Thin Film Bulk Acoustic Wave Resonators for their Application in Microwave Filters," IEEE Int. Conf. on Electrical and Electronics Eng., pp. 353-356, Mexico City, Mexico, September 2007.
• C. E. Saavedra, A. Morales-Acevedo, B. R. Jackson, “Microwave Bandpass Filters using Zinc Oxide Resonator Membranes,” XIV International Materials Research Congress, Cancún, México, August 2005. (Poster)
• C. E. Saavedra, et. al. “Hole Barrier Bipolar Transistors using InGaP/GaAs,” 19th Workshop on Compound Semiconductors and Integrated Circuits in Europe, Stockholm, Sweden, May 1995.
  
• M. Shur, B. Gelmont, C. Saavedra, and G. Kelner, “Potential of wide bandgap semiconductor devices for high-temperature applications,” Institute of Physics Conference, Ser. No. 137, pp. 465-470, 1993. (pdf file) 

Lectures and/or Invited Talks

• "Layout Techniques for IC Design," three-day workshop delivered at CINVESTAV, Guadalajara, México, December 7 to 9, 2010.
• "CMOS RF Integrated Circuits for Broadband Wireless Communications," IBM Microelectronics, Hopewell Junction, New York, USA, October 11, 2010.
• "Front-End RF Integrated Circuits for Communications Applications" Universidade de São Paulo, Brazil, September, 2010.
• "Advances in Mixer Design: Subharmonic Mixers and Applications," Plenary Talk, joint IEEE Col. Workshop on Electron Devices and IEEE Col. Workshop on Circuits and Systems, Bogotá, Colombia, October 6, 2009.
• "Frequency Multipliers: Design Techniques and Applications," CMOS-ET Workshop, Vancouver, Canada, Sept. 24, 2009.
• "Advances in CMOS Subharmonic Mixers," University of British Columbia, Vancouver, Canada, September 24, 2009.
  
• "CMOS Subharmonic Mixers and Applications," International Microwave Symposium WME workshop, Boston, MA,
  June 8, 2009.
• "Wideband RF Integrated Circuits for Wireless Applications," SiGe Semiconductor, Ottawa, Canada, April 21, 2009.
• "Oscillation and Mixing Circuits using Harmonic Signals," Communications Research Centre (CRC), Ottawa, Canada,
  February 20, 2008.
• "Front-End Microwave Circuits and Sytems," Universiteit Twente, Enschede, The Netherlands, December 14, 2006.
  
• "Microelectronic Circuits for Microwave Communications using CMOS Technology," Universidad del Valle, Santiago de Cali, Colombia, July 14, 2006.
  
• "Microelectronic Circuits for Microwave Communications using CMOS Technology," Universidad de Los Andes, Bogotá, Colombia, July 6, 2006.
  
• "Microwave MEMS and CMOS Integrated Circuits for Communications and Telemetry," Gennum Corporation, Burlington, Ontario, Canada, May 26, 2006.
  
• “Negative Index of Refraction Metamaterials and their Applications,” Universidad Autonoma del Estado de Hidalgo, México, August 26, 2005.
• “3 GHz to 9 GHz Silicon Germanium Frequency Tripler,” IBM Microelectronics, Hopewell Junction, NY, USA, December 2004.
  
• “Active and Passive Millimeter-Wave Circuits for Wireless Technology,” Rensselaer Polytechnic Institute, Troy, New York, USA, March 2000.
  
• “Active and Passive Millimeter-Wave Circuits for Wireless Technology,” Department of Electrical Engineering and Computer Science, Syracuse University, Syracuse, New York, March 2000.
  
• "Millimeter-Wave Gratings and Horns for Amplifier Array Applicatons," Cornell Nanofabrication Facility Annual Affiliates Meeting, Ithaca, New York, October 1997.
  
• “InGaP/GaAs Hole Barrier Bipolar Transistors,” Fraunhofer Institute for Applied Solid State Physics, Freiburg, Germany, May 1995.