Publications

Analog Coherent Detection for Energy Efficient Intra-Data Center Links at 200 Gbps Per Wavelength, Hirokawa, Takako, Pinna Sergio, Hosseinzadeh Navid, Maharry Aaron, Andrade Hector, Liu Junqian, Meissner Thomas, Misak Stephen, Movaghar Ghazal, Valenzuela Luis A., et al. , Journal of Lightwave Technology, Volume 39, Number 2, p.520-531, (2021)

Analog Coherent Detection for Energy Efficient Intra-Data Center Links at 200 Gbps Per Wavelength, Hirokawa, Takako, Pinna Sergio, Hosseinzadeh Navid, Maharry Aaron, Andrade Hector, Liu Junqian, Meissner Thomas, Misak Stephen, Movaghar Ghazal, Valenzuela Luis A., et al. , Journal of Lightwave Technology, Volume 39, Number 2, p.520-531, (2021)

A Fully Integrated O-band Coherent Optical Receiver Operating up to 80 Gb/s, Xia, Yujie, Valenzuela Luis, Maharry Aaron, Pinna Sergio, Dwivedi Sarvagya, Hirokawa Takako, Buckwalter James, and Schow Clint , 2021 IEEE Photonics Conference (IPC), p.1-2, (2021)

A 2.85 pJ/bit, 52-Gbps NRZ VCSEL Driver with Two-Tap Feedforward Equalization, Valenzuela, Luis A., Andrade Hector, Hosseinzadeh Navid, Maharry Aaron, Schow Clint L., and Buckwalter James F. , 2020 IEEE/MTT-S International Microwave Symposium (IMS), p.209-212, (2020)

A 50-Gb/s Optical Transmitter Based on Co-design of a 45-nm CMOS SOI Distributed Driver and 90-nm Silicon Photonic Mach-Zehnder Modulator, Hosseinzadeh, Navid, Fang Kelvin, Valenzuela Luis, Schow Clint, and Buckwalter James F. , 2020 IEEE/MTT-S International Microwave Symposium (IMS), p.205-208, (2020)

Analysis and Monolithic Implementation of Differential Transimpedance Amplifiers, Andrade, Hector, Maharry Aaron, Hirokawa Takako, Valenzuela Luis, Pinna Sergio, Simon Stefan, Schow Clint L., and Buckwalter James F. , Journal of Lightwave Technology, Volume 38, Number 16, p.4409-4418, (2020)

A Novel Concept using Derivative Superposition at the Device-Level to Reduce Linearity Sensitivity to Bias in N-polar GaN MISHEMT, Shrestha, Pawana, Guidry Matthew, Romanczyk Brian, Karnaty Rohit R., Hatui Nirupam, Wurm Christian, Krishna Athith, Pasayat Shubhra S., Keller Stacia, Buckwalter James F., et al. , 2020 Device Research Conference (DRC), p.1-2, (2020)

A 0.5-20 GHz RF silicon photonic receiver with 120 dB. Hz2/3 SFDR using broadband distributed IM3 injection linearization, Hosseinzadeh, Navid, Jain Aditya, Ning Kang, Helkey Roger, and Buckwalter J , Proc. IEEE Radio Frequency Integr. Circuits Symp, (2019)

A 0.5-20 GHz RF silicon photonic receiver with 120 dB. Hz2/3 SFDR using broadband distributed IM3 injection linearization, Hosseinzadeh, Navid, Jain Aditya, Ning Kang, Helkey Roger, and Buckwalter J , Proc. IEEE Radio Frequency Integr. Circuits Symp, (2019)

A 1 to 20 GHz silicon-germanium low-noise distributed driver for RF silicon photonic Mach–Zehnder modulators, Hosseinzadeh, Navid, Jain Aditya, Ning Kang, Helkey Roger, and Buckwalter J , Proc. IEEE/MTT-S Int. Microw. Symp., (2019)

A 1 to 20 GHz silicon-germanium low-noise distributed driver for RF silicon photonic Mach–Zehnder modulators, Hosseinzadeh, Navid, Jain Aditya, Ning Kang, Helkey Roger, and Buckwalter J , Proc. IEEE/MTT-S Int. Microw. Symp., (2019)

A 1.5-dB Insertion Loss, 34-dBm P1dB Power Modulator with 46% Fractional Bandwidth in 45-nm CMOS SOI, Hill, C., Hamza A., AlShammary H., and Buckwalter J. F. , 2019 IEEE MTT-S International Microwave Symposium (IMS), June, p.243-246, (2019)

A 1.5-dB Insertion Loss, 34-dBm P1dB Power Modulator with 46% Fractional Bandwidth in 45-nm CMOS SOI, Hill, C., Hamza A., AlShammary H., and Buckwalter J. F. , 2019 IEEE MTT-S International Microwave Symposium (IMS), June, p.243-246, (2019)

A 30-GHz CMOS SOI Outphasing Power Amplifier With Current Mode Combining for High Backoff Efficiency and Constant Envelope Operation, Ning, Kang, Fang Yihao, Hosseinzadeh Navid, and Buckwalter James F. , IEEE Journal of Solid-State Circuits, (2019)

A 52-dB Self-Interference Rejection Receiver using RF Code-Domain Signal Processing, Hamza, Ahmed, AlShammary Hussam, Hill Cameron, and Buckwalter James , 2019 IEEE Custom Integrated Circuits Conference (CICC), p.1–4, (2019)

A 52-dB Self-Interference Rejection Receiver using RF Code-Domain Signal Processing, Hamza, Ahmed, AlShammary Hussam, Hill Cameron, and Buckwalter James , 2019 IEEE Custom Integrated Circuits Conference (CICC), p.1–4, (2019)

A Code-Domain RF Signal Processing Front-end for Simultaneous Transmit and Receive with 49.5 dB Self-Interference Rejection, 12.1 dBm Receive Compression, and 34.3 dBm Transmit Compression, AlShammary, H., Hill C. W., Hamza A., and Buckwalter J. F. , 2019 IEEE Radio Frequency Integrated Circuits Symposium (RFIC), June, p.143-146, (2019)

A Code-Domain RF Signal Processing Front-end for Simultaneous Transmit and Receive with 49.5 dB Self-Interference Rejection, 12.1 dBm Receive Compression, and 34.3 dBm Transmit Compression, AlShammary, H., Hill C. W., Hamza A., and Buckwalter J. F. , 2019 IEEE Radio Frequency Integrated Circuits Symposium (RFIC), June, p.143-146, (2019)

Code-Pass and Code-Reject Filters for Simultaneous Transmit and Receive in 45-nm CMOS SOI, AlShammary, Hussam, Hill Cameron, Hamza Ahmed, and Buckwalter James F. , IEEE Transactions on Microwave Theory and Techniques, Volume 67, Number 7, p.2730–2740, (2019)

Code-Pass and Code-Reject Filters for Simultaneous Transmit and Receive in 45-nm CMOS SOI, AlShammary, Hussam, Hill Cameron, Hamza Ahmed, and Buckwalter James F. , IEEE Transactions on Microwave Theory and Techniques, Volume 67, Number 7, p.2730–2740, (2019)

Energy Efficiency Analysis of Coherent Links for Datacenters, Hirokawa, Takako, Pinna Sergio, Klamkin Jonathan, Buckwalter James F., and Schow Clint L. , 2019 IEEE Optical Interconnects Conference (OI), p.1–2, (2019)

A High Spur-Free Dynamic Range Silicon DC Kerr Ring Modulator for RF Applications, Jain, Aditya, Hosseinzadeh Navid, Wu Xinru, Tsang Hon Ki, Helkey Roger, Bowers John E., and Buckwalter James F. , Journal of Lightwave Technology, Volume 37, Number 13, p.3261–3272, (2019)

A High Spur-Free Dynamic Range Silicon DC Kerr Ring Modulator for RF Applications, Jain, Aditya, Hosseinzadeh Navid, Wu Xinru, Tsang Hon Ki, Helkey Roger, Bowers John E., and Buckwalter James F. , Journal of Lightwave Technology, Volume 37, Number 13, p.3261–3272, (2019)

A Linear Microwave Electro-Optic Front End With SiGe Distributed Amplifiers and Segmented Silicon Photonic Mach-Zehnder Modulator, Hosseinzadeh, Navid, Jain Aditya, Ning Kang, Helkey Roger, and Buckwalter James F. , IEEE Transactions on Microwave Theory and Techniques, (2019)

A Linear Microwave Electro-Optic Front End With SiGe Distributed Amplifiers and Segmented Silicon Photonic Mach-Zehnder Modulator, Hosseinzadeh, Navid, Jain Aditya, Ning Kang, Helkey Roger, and Buckwalter James F. , IEEE Transactions on Microwave Theory and Techniques, (2019)

Monolithically-Integrated 50 Gbps 2pJ/bit Photoreceiver with Cherry-Hooper TIA in 250nm BiCMOS Technology, Andrade, Hector, Hirokawa Takako, Maharry Aaron, Rylyakov Alexander, Schow Clint L., and Buckwalter James F. , Optical Fiber Communication Conference, p.M3A–5, (2019)

A Novel Architecture for a Two-Tap Feed-Forward Optical or Electrical Domain Equalizer using a Differential Element, Maharry, Aaron, Andrade Hector, Hirokawa Takako, Buckwalter James F., and Schow Clint L. , 2019 IEEE Photonics Conference (IPC), p.1–2, (2019)

Virtual-Source Modeling of N-polar GaN MISHEMTS, Karnaty, Rohit R., Guidry Matthew, Shrestha Pawana, Romanczyk Brian, Hatui Nirupam, Zheng Xun, Wurm Christian, Li Haoran, Keller Stacia, Mishra Umesh K., et al. , 2019 IEEE BiCMOS and Compound semiconductor Integrated Circuits and Technology Symposium (BCICTS), p.1-4, (2019)

A 30.9 dBm, 300 MHz 45-nm SOI CMOS Power Modulator for Spread-Spectrum Signal Processing at the Antenna, Hill, Cameron, Levy Cooper S., AlShammary Hussam, Hamza Ahmed, and Buckwalter James F. , 2018 IEEE/MTT-S International Microwave Symposium-IMS, p.423–426, (2018)

A 30.9 dBm, 300 MHz 45-nm SOI CMOS Power Modulator for Spread-Spectrum Signal Processing at the Antenna, Hill, Cameron, Levy Cooper S., AlShammary Hussam, Hamza Ahmed, and Buckwalter James F. , 2018 IEEE/MTT-S International Microwave Symposium-IMS, p.423–426, (2018)

Code Selective Filters in CMOS Processes for Full Duplex Communication and Interference Mitigation, Al-Shammary, Hussam, Hill Cameron, Hamza Ahmad, Rincon Fernando, and Buckwalter James F. , (2018)

Code Selective Filters in CMOS Processes for Full Duplex Communication and Interference Mitigation, Al-Shammary, Hussam, Hill Cameron, Hamza Ahmad, Rincon Fernando, and Buckwalter James F. , (2018)

Linear Ring Modulators with DC Kerr Phase Shifters, Jain, Aditya, Wu Xinru, Bowers John E., Helkey Roger, and Buckwalter James , 2018 IEEE Avionics and Vehicle Fiber-Optics and Photonics Conference (AVFOP), p.1–2, (2018)

RF silicon photonics for wideband, high dynamic range microwave and millimeter-wave signal processing, Hosseinzadeh, Navid, Jain Aditya, Helkey Roger, and Buckwalter James F. , 2018 IEEE 18th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF), p.41–44, (2018)

RF silicon photonics for wideband, high dynamic range microwave and millimeter-wave signal processing, Hosseinzadeh, Navid, Jain Aditya, Helkey Roger, and Buckwalter James F. , 2018 IEEE 18th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF), p.41–44, (2018)

RF Watt-Level Low-Insertion-Loss High-Bandwidth SOI CMOS Switches, Hill, Cameron, Levy Cooper S., AlShammary Hussam, Hamza Ahmed, and Buckwalter James F. , IEEE Transactions on Microwave Theory and Techniques, Volume 66, Number 12, p.5724–5736, (2018)

RF Watt-Level Low-Insertion-Loss High-Bandwidth SOI CMOS Switches, Hill, Cameron, Levy Cooper S., AlShammary Hussam, Hamza Ahmed, and Buckwalter James F. , IEEE Transactions on Microwave Theory and Techniques, Volume 66, Number 12, p.5724–5736, (2018)

A Series $${$N$}$ $-Path Code Selective Filter for Transmitter Rejection in Full-Duplex Communication, Hamza, Ahmed, AlShammary Hussam, Hill Cameron, and Buckwalter James F. , IEEE Microwave and Wireless Components Letters, Volume 29, Number 1, p.38–40, (2018)

A Series $${$N$}$ $-Path Code Selective Filter for Transmitter Rejection in Full-Duplex Communication, Hamza, Ahmed, AlShammary Hussam, Hill Cameron, and Buckwalter James F. , IEEE Microwave and Wireless Components Letters, Volume 29, Number 1, p.38–40, (2018)

Sources of RF intermodulation distortion in silicon photonic modulators, Hosseinzadeh, Navid, Jain Aditya, Helkey Roger, and Buckwalter James , 2018 IEEE Avionics and Vehicle Fiber-Optics and Photonics Conference (AVFOP), p.1–2, (2018)

Sources of RF intermodulation distortion in silicon photonic modulators, Hosseinzadeh, Navid, Jain Aditya, Helkey Roger, and Buckwalter James , 2018 IEEE Avionics and Vehicle Fiber-Optics and Photonics Conference (AVFOP), p.1–2, (2018)

A λ/4-lnverted N-path Filter in 45-nm CMOS SOI for Transmit Rejection with Code Selective Filters, AlShammary, Hussam, Hill Cameron, Hamza Ahmed, and Buckwalter James F. , 2018 IEEE/MTT-S International Microwave Symposium-IMS, p.1370–1373, (2018)

A λ/4-lnverted N-path Filter in 45-nm CMOS SOI for Transmit Rejection with Code Selective Filters, AlShammary, Hussam, Hill Cameron, Hamza Ahmed, and Buckwalter James F. , 2018 IEEE/MTT-S International Microwave Symposium-IMS, p.1370–1373, (2018)

A compact, 37% fractional bandwidth millimeter-wave phase shifter using a wideband lange coupler for 60-GHz and E-band systems, Hosseinzadeh, Navid, and Buckwalter James F. , 2017 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS), p.1–4, (2017)

Forward bias operation of silicon photonic Mach Zehnder modulators for RF applications, Chao, Rui Lin, Shi Jin Wei, Jain Aditya, Hirokawa Takako, Khope Akhilesh S. P., Schow Clint, Bowers JE, Helkey Roger, and Buckwalter James F. , Optics express, Volume 25, Number 19, p.23181–23190, (2017)

Forward bias operation of silicon photonic Mach Zehnder modulators for RF applications, Chao, Rui Lin, Shi Jin Wei, Jain Aditya, Hirokawa Takako, Khope Akhilesh S. P., Schow Clint, Bowers JE, Helkey Roger, and Buckwalter James F. , Optics express, Volume 25, Number 19, p.23181–23190, (2017)

Forward bias optimization of a silicon photonic modulator for analog application, Jain, Aditya, Chao Rui Lin, Shi Jin Wei, Schow Clint, Bowers JE, Helkey Roger, and Buckwalter James , 2017 IEEE Avionics and Vehicle Fiber-Optics and Photonics Conference (AVFOP), p.47–48, (2017)

A 45-GHz Si/SiGe 256-QAM transmitter with digital predistortion, Wu, Po-Yi, Liu Youjiang, Hanafi Bassel, Dabag Hayg, Asbeck Peter, and Buckwalter James , 2015 IEEE MTT-S International Microwave Symposium, p.1–3, (2015)

$ Q $-Band Spatially Combined Power Amplifier Arrays in 45-nm CMOS SOI, Hanafi, Bassel, Guerbuez Ozan, Dabag Hayg, Buckwalter James F., Rebeiz Gabriel, and Asbeck Peter , IEEE Transactions on Microwave Theory and Techniques, Volume 63, Number 6, p.1937–1950, (2015)

Transmission of signals with complex constellations using millimeter-wave spatially power-combined CMOS power amplifiers and digital predistortion, Dabag, Hayg-Taniel, Hanafi Bassel, Gürbüz Ozan D., Rebeiz Gabriel M., Buckwalter James F., and Asbeck Peter M. , IEEE Transactions on Microwave Theory and Techniques, Volume 63, Number 7, p.2364–2374, (2015)

Spatially power-combined W-band power amplifier using stacked CMOS, Jayamon, Jefy, Gurbuz Ozan, Hanafi Bassel, Agah Amir, Buckwalter James, Rebeiz Gabriel, and Asbeck Peter , 2014 IEEE Radio Frequency Integrated Circuits Symposium, p.151–154, (2014)

Active millimeter-wave phase-shift Doherty power amplifier in 45-nm SOI CMOS, Agah, Amir, Dabag Hayg-Taniel, Hanafi Bassel, Asbeck Peter M., Buckwalter James F., and Larson Lawrence E. , IEEE Journal of Solid-State Circuits, Volume 48, Number 10, p.2338–2350, (2013)

Analysis and design of stacked-FET millimeter-wave power amplifiers, Dabag, Hayg-Taniel, Hanafi Bassel, Golcuk Fatih, Agah Amir, Buckwalter James F., and Asbeck Peter M. , IEEE Transactions on Microwave Theory and Techniques, Volume 61, Number 4, p.1543–1556, (2013)

A W-band stacked FET power amplifier with 17 dBm P sat in 45-nm SOI MOS, Jayamon, Jefy, Agah Amir, Hanafi Bassel, Dabag Hayg, Buckwalter James, and Asbeck Peter , 2013 IEEE Radio and Wireless Symposium, p.256–258, (2013)

A 34% PAE, 18.6 dBm 42–45GHz stacked power amplifier in 45nm SOI CMOS, Agah, Amir, Dabag Hayg, Hanafi Bassel, Asbeck Peter, Larson Lawrence, and Buckwalter James , 2012 IEEE Radio Frequency Integrated Circuits Symposium, p.57–60, (2012)

A 45GHz Doherty power amplifier with 23% PAE and 18dBm output power, in 45nm SOI CMOS, Agah, Amir, Hanafi Bassel, Dabag Hayg, Asbeck Peter, Larson Lawrence, and Buckwalter James , 2012 IEEE/MTT-S International Microwave Symposium Digest, p.1–3, (2012)

Modeling and analysis of power distribution networks in 3-D ICs, Hu, Xiang, Du Peng, Buckwalter James F., and Cheng Chung-Kuan , IEEE Transactions on Very Large Scale Integration (VLSI) Systems, Volume 21, Number 2, p.354–366, (2012)

A Q-band amplifier implemented with stacked 45-nm CMOS FETs, Pornpromlikit, Sataporn, Dabag Hayg-Taniel, Hanafi Bassel, Kim Joohwa, Larson Lawrence E., Buckwalter James F., and Asbeck Peter M. , 2011 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS), p.1–4, (2011)

Prediction and comparison of high-performance on-chip global interconnection, Zhang, Yulei, Hu Xiang, Deutsch Alina, A Engin Ege, Buckwalter James F., and Cheng Chung-Kuan , IEEE Transactions on Very Large Scale Integration (VLSI) Systems, Volume 19, Number 7, p.1154–1166, (2010)

Crosstalk equalizer, Buckwalter, James, and Hajimiri Seyed Ali , (2009)

Prediction of high-performance on-chip global interconnection, Zhang, Yulei, Hu Xiang, Deutsch Alina, Engin A, Buckwalter James F., and Cheng Chung-Kuan , Proceedings of the 11th international workshop on System level interconnect prediction, p.61–68, (2009)

Deterministic jitter equalizer, Buckwalter, James, Hajimiri Seyed Ali, and Analui Behnam , (2008)

Analysis and equalization of data-dependent jitter, Buckwalter, James F., and Hajimiri Ali , IEEE Journal of Solid-State Circuits, Volume 41, Number 3, p.607–620, (2006)

Cancellation of crosstalk-induced jitter, Buckwalter, James F., and Hajimiri Ali , IEEE journal of solid-state circuits, Volume 41, Number 3, p.621–632, (2006)

An integrated subharmonic coupled-oscillator scheme for a 60-GHz phased-array transmitter, Buckwalter, James F., Babakhani Aydin, Komijani Abbas, and Hajimiri Ali , IEEE Transactions on Microwave Theory and Techniques, Volume 54, Number 12, Pa, p.4271–4280, (2006)

Phase and amplitude pre-emphasis techniques for low-power serial links, Buckwalter, James F., Meghelli Mounir, Friedman Daniel J., and Hajimiri Ali , IEEE Journal of solid-state circuits, Volume 41, Number 6, p.1391–1399, (2006)

Quadrature Subharmonic Coupled Oscillators for a 60GHz SiGe Scalable Phased Array, Buckwalter, James F., Babakhani Aydin, Komijani Abbas, and Hajimiri Ali , 2006 IEEE MTT-S International Microwave Symposium Digest, p.822–825, (2006)

Crosstalk-induced jitter equalization, Buckwalter, James, and Hajimiri Ali , Proceedings of the IEEE 2005 Custom Integrated Circuits Conference, 2005., p.409–412, (2005)

Data-dependent jitter in serial communications, Analui, Behnam, Buckwalter James F., and Hajimiri Ali , IEEE Transactions on Microwave Theory and Techniques, Volume 53, Number 11, p.3388–3397, (2005)

Estimating data-dependent jitter of a general LTI system from step response, Analui, Behnam, Buckwalter James, and Hajimiri Ali , IEEE MTT-S International Microwave Symposium Digest, 2005., p.4–pp, (2005)

A 10Gb/s data-dependent jitter equalizer, Buckwalter, James, and Hajimiri Ali , Proceedings of the IEEE 2004 Custom Integrated Circuits Conference (IEEE Cat. No. 04CH37571), p.39–42, (2004)

An active analog delay and the delay reference loop, Buckwalter, James, and Hajimiri Ali , 2004 IEE Radio Frequency Integrated Circuits (RFIC) Systems. Digest of Papers, p.17–20, (2004)

Data-dependent jitter and crosstalk-induced bounded uncorrelated jitter in copper interconnects, Buckwalter, James, Analui Behnam, and Hajimiri Ali , 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No. 04CH37535), Volume 3, p.1627–1630, (2004)

Predicting data-dependent jitter, Buckwalter, James, Analui Behnam, and Hajimiri Ali , IEEE Transactions on Circuits and Systems II: Express Briefs, Volume 51, Number 9, p.453–457, (2004)

Synchronization design of a coupled phase-locked loop, Buckwalter, James F., Heath Ted H., and York Robert A. , IEEE transactions on microwave theory and techniques, Volume 51, Number 3, p.952–960, (2003)