Publications

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Journal Publications

  1. N. Casilli, T. Kaisar, L. Colombo, S. Ghosh, P. X.-L. Feng, and C. Cassella, “Parametric Frequency Divider based Ising Machines“, Physical Review Letters (2024)
  2. H. M. E. Hussein, S. Kim, M. Rinaldi, A. Alu, and C. Cassella, “Passive frequency comb generation at radiofrequency for ranging applications“,  nature communications (2024)
  3. O. Kaya, L. Colombo, P. Simeoni, B. Davaji, M. Rinaldi and C. Cassella, “A Radiofrequency Threshold Temperature Sensor Using a Hf0.5Zr0.5O2 Device and a Microacoustic Piezoelectric Resonant Sensor,” in Journal of Microelectromechanical Systems, doi: 10.1109/JMEMS.2024.3364521.
  4. H. M. E. Hussein, and C. Cassella, “Utilization of SAW Resonators to Enable Identification Capabilities in Subharmonic Tags“, IEEE Internet of Things Journal (2023)
  5. N. Casilli, L. Colombo, and C. Cassella,  “A UHF 1.3 cm2 Passive Subharmonic Tag with a 13 meters Read-Range”, IEEE Microwave and Wireless Technology Letters, (Selected for special Issue on IMS 2023)
  6. M. Yan, H. M. E. Hussein, C. Cassella, M. Rinaldi, and M. Onabajo, “Design and Analysis of an On-chip Current-driven CMOS Parametric Frequency Divider“, IEEE Transactions on Circuits and Systems (2023)
  7. X. Zhao, O. Kaya, M. Pirro, P Simeoni, J. Segovia, and C. Cassella,  “Extending the Linearity of AlScN Contour-Mode-Resonators through Acoustic Metamaterials-based Reflectors“, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control (Spotlight), doi:10.1109/TUFFC.2023.3245809.
  8. X. Zhao, O. Kaya, M. Pirro, M. Assylbekova, L. Colombo, P. Simeoni, and C. Cassella, “A 5.3 GHz Al0.76Sc0.24N Two-Dimensional Resonant Rods Resonator with a kt2 of 23.9%”, IEEE Journal of Microelectromechanical Systems, doi: 10.1109/JMEMS.2022.3178978.
  9. H. M. E. Hussein, M. Rinaldi, M. Onabajo, and C. Cassella, “Capturing and Recording Cold Chain Temperature Violations through Parametric Alarm-Sensor Tags“, Applied Physics Letters 119, 014101 (2021)
  10. H. M. E. Hussein, M. A. A. Ibrahim, M. Rinaldi, M. Onabajo, and C. Cassella, “Reflective Parametric Frequency-Selective Limiters With Sub-dB Loss and μWatts Power Thresholds,” IEEE Transactions on Microwave Theory and Techniques, vol. 69, no. 6, pp. 2989-3000, June 2021, doi: 10.1109/TMTT.2021.3072587.
  11. H. M. E. Hussein, M. Rinaldi, M. Onabajo, and C. Cassella,”Chip-Less and Battery-Less Subharmonic Tags for Wireless Sensing with Parametrically Enhanced Sensitivities and Dynamic Ranges“, Scientific Reports 11, 3782 (2021)
  12. H. M. E. Hussein, M. A. A. Ibrahim, G. Michetti, M. Rinaldi, M. Onabajo, and C. Cassella, “Systematic Synthesis and Design of Ultralow Threshold 2:1 Parametric Frequency Dividers”,  IEEE Transactions on Microwave Theory and Techniques, vol. 68, no. 8, pp. 3497-3509, Aug. 2020.
  13. Pop, Flavius, Herrera, B., Cassella, C., & Rinaldi, M.,”Modeling and Optimization of Directly Modulated Piezoelectric Micromachined Ultrasonic Transducers.” Sensors 21, n.1, p.157, 2021.
  14. X. Zhao, L. Colombo, and C. Cassella, “Aluminum nitride two-dimensional-resonant-rods“, Applied Physics Letters, vol. 116, no. 14, p. 143504, 2020. (Selected as a Featured Article)
  15. Herrera, B., Pop, F., Cassella, C., Rinaldi, M., “Miniaturized PMUT-based Receiver for Underwater Acoustic Networking”, IEEE Journal of Microelectromechanical Systems, 29(5), 832-838, 2020
  16. Pop, F., Herrera, B., Cassella, C., Rinaldi, M., “Enabling Real-Time Monitoring of Introbody Networks Through the Acoustic Discovery Architecture”, IEEE Transactions on Ultrasonic, Ferroelectrics and Frequency Control, 67(11), 2336-2344, 2020
  17. Yu, Y., Michetti, G., Kord, A., Pirro, M., Sounas, D.L., Xiao, Z., Cassella, C., Alù, A. and Rinaldi, M., “Highly-Linear Magnet-Free Microelectromechanical Circulators”,IEEE Journal of Microelectromechanical Systems, 2019.
  18. Yu, Y., Michetti, G., Pirro, M., Kord, A., Sounas, D.L., Xiao, Z., Cassella, C., Alù, A. and Rinaldi, M., 2019.“Radio Frequency Magnet-Free Circulators Based on Spatiotemporal Modulation of Surface Acoustic Wave Filters”,IEEE Transactions on Microwave Theory and Techniques, accepted for publication, 2019
  19. Cassella, C., Michetti, G., Pirro, M., Yu, Y., Kord, A., Sounas, D., Alu, A., Rinaldi, M., “Radio Frequency Angular Momentum Biased Quasi-LTI Nonreciprocal Acoustic Filters”, IEEE Transaction on Ultrasonics, Ferroelectrics and Frequency Control, 2019.
  20. Cassella, C., Segovia, J., “High-kt2 Exceeding 6.4% Through Metal Frames in Aluminum Nitride Two-Dimensional Modal Resonators”, IEEE Transaction on Ultrasonics, Ferroelectrics and Frequency Control, 2018.
  21. Zhu, W. Z., Wu, T., Chen, G., Cassella, C., Assylbekova, M., Rinaldi, M., & McGruer, N. (2018)., “Design and Fabrication of an Electrostatic AlN RF MEMS Switch for Near-Zero Power RF Wake-Up Receivers”, IEEE Sensors Journal, 18(24), 9902-9909, 2018.
  22. Puder, Jonathan M., Jeffrey S. Pulskamp, Ryan Q. Rudy, Cristian Cassella, Matteo Rinaldi, Guofeng Chen, Sunil A. Bhave, and Ronald G. Polcawich. “Rapid Harmonic Analysis of Piezoelectric MEMS Resonators”, IEEE Transaction on Ultrasonics, Ferroelectrics and Frequency Control, 65, no. 6, 979-990,2018.
  23. Cassella, C., Strachan, S., Shaw, Piazza, G., ”Phase Noise Suppression through Parametric Filtering”, Applied Physics Letters 110 (6), 063503, 2017
  24. Z. Qian, V. Rajaram, R. Sungho Kang, T. Wu, C. Cassella, N. McGruer, M. Rinaldi: “Zero Power Infrared Digitizers Based on Plasmonically-enhanced Micromechanical Photoswitches”, Nature Nanotechnology, 2017 (This paper was selected as cover for the Nature Nanotechnology October 2017 issue).
  25. Gibson, B., Qalandar, K., Cassella, C., Piazza, G., Turner, K., ”A study on the effects of release area on the quality factor of contour-mode resonators by laser doppler vibrometry”, IEEE Transaction on Ultrasonics, Ferroelectric and Frequency Control, 2017.
  26. Chen, G., Cassella, C., Qian, Z., Hummel, G., Rinaldi, M., ”Lithographically defined aluminum nitride cross-sectional Lamé mode resonators”, Journal of Micromechanics and Microengineering 27 (3), 034003, 2017.
  27. Cassella, C., Oliva, N., Soon, J., Srinivas, M., Singh, N., Piazza, G.,”Super High Frequency Aluminum Nitride Two-Dimensional Mode Resonators with kt2 exceeding 4.9%”, IEEE Microwave and Wireless Components Letters, 27 (2), 105-107, 2017.
  28. Cassella, C., Chen.G, Qian,Z.,Hummels, G.,Rinaldi,M.,“ Radio Frequency Passive Components Based on Aluminum Nitride Cross-Sectional Lamé Mode MEMS Resonators”, IEEE Transaction on Electron-Devices (T-ED), 64 (1), 237-243, 2016.
  29. Cassella, C., Chen.G, Qian,Z.,Hummels, G.,Rinaldi,M.,“Cross-Sectional Lame Mode Ladder Filters for UHF wideband applications”, Electron Device Letter, IEEE, 37 (5), 681-683, 2016.
  30. Cassella, C., Hui,Y., Qian,Z., Rinaldi,M.,“Aluminum Nitride Cross-Sectional Lame Mode Resonators”, Microelectromechanical Systems, Journal of, IEEE, 25 (2), 275-285, 2016 (identified as a paper of excellent quality, hence being highlighted as a JMEMS RightNow-Paper to a large community of readers and being released as open access for a limited time).
  31. Cassella, C., and Piazza, G., “AlN Two-Dimensional Mode Resonators for Ultra-High-Frequency Filtering Application”, Electron Device Letters, IEEE 36.11: 1192-1194, 2015.
  32. Cassella, C., and Piazza, G., “Quality Factor Dependence on the Inactive Regions in AlN Contour-Mode Resonators”, Microelectromechanical Systems, Journal of, IEEE, 24.5: 1575-1582, 2015.
  33. Cassella, C., and Piazza, G.. “Low phase-noise autonomous parametric oscillator based on a 226.7 MHz AlN contour-mode resonator.” Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, IEEE, 62.4: 617-624, 2015.
  34. Segovia-Fernandez, J., Cremonesi, M., Cassella, C., Frangi, A., & Piazza, G. “Anchor Losses in AlN Contour Mode Resonators.”, IEEE Journal of Microelectromechanical Systems, 24.2: 265-275, 2015 (identified as a paper of excellent quality, hence being highlighted as a JMEMS RightNow-Paper to a large community of readers and being released as open access for a limited time).

Conference Publications

  1. X. Zhao, J.M. De Ponti, T. Maggioli, M. Colangelo, R. Craster, and C. Cassella, “TOPOLOGICALLY PROTECTED FANO RESONANCE IN A 80 MHZ SC-DOPED ALN THIN FILM RESONATOR WITH A QUALITY FACTOR LARGER THAN 10K”, The Hilton Head 2024 Solid-State Sensors, Actuators & Microsystems Workshop (Hilton Head Workshop 2024). (Late News)
  2. S. Quaresima, G.Giribaldi, V. Petrov, J. Jornet, B. Davaji, L. Colombo, M. Rinaldi, C. Cassella, “On-chip mmWave Antennas on a Piezoelectric ScAlN-Si Platform for 6G-grade Internet of Things”, 2024 IEEE International Symposium on Antennas and Propagation (IEEE APS/URSI 2024)
  3. T. Maggioli, X. Zhao, C. Cassella, M. Colangelo, “Detection of sub-threshold events in a superconducting nanowire using an acoustic resonator”, The Applied Superconductivity Conference (ASC 2024)
  4. H. M. E. Hussein, F. B. Ayed, A. Venditti, P. Simeoni, C. Cassella, M. Rinaldi, “A PARAMETRIC FREQUENCY COMB GENERATOR IMPROVING BY 10X THE LIMIT-OF-DETECTION OF 120 MHZ ALSCN-BASED IR DETECTORS”, The Hilton Head 2024 Solid-State Sensors, Actuators & Microsystems Workshop (Hilton Head Workshop 2024).
  5. H. M. E. Hussein, O. M. O. Abdalla, P. Simeoni, L. Colombo, A. Corigliano, M. Rinaldi, and C. Cassella, “Far-Field Acoustic Sensing via pMUT-Based Subharmonic Tags: A Battery-Free Approach for Hybrid RF-Ultrasound Wireless Sensor Networks”, The 37th International Conference on Micro Electro Mechanical Systems (IEEE MEMS 2024).
  6. L. Colombo, J. Guida, N. Casilli, R. Tetro, M. Galanko, S. Bedair, C. Cassella, S. Ghosh, and M. Rinaldi,  “Monolithic Integration of X-Cut Leaky SAWs and Electrically Small Antennas for RF Passive Wireless Sensors”, The 2023 IEEE International Ultrasonics Symposium in Montreal, Canada (IUS 2023).
  7. N. Casilli, H. Hussein, T. Kaisar, R. Tetro, L. Colombo, P. X.-L. Feng, and C. Cassella,  “An Ising Tag with a LiNbO3 Resonator for Temperature Threshold Sensing”, The Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum in Toyama, Japan (IFCS 2023). (EFTF-IFCS 2023 Best Student Paper Award Winner)
  8. N. Casilli, L. Colombo, and C. Cassella,  “A UHF 1.3 cm2 Passive Subharmonic Tag with a 13 meters Read-Range”, The IEEE International Microwave Symposium in San Diego, California (IMS 2023).(Selected as a Top 50 paper for submission in Microwave and Wireless Technology Letters)
  9. N. Casilli, O. Kaya, T. Kaisar, B. Davaji, P. X.-L. Feng, and C. Cassella, “Nonvolatile State Configuration of Nano-Watt Parametric Ising Spins Through Ferroelectric Hafnium Zirconium Oxide MEMS Varactors”, The 36th International Conference on Micro Electro Mechanical Systems (IEEE MEMS 2023).
  10. O. Kaya, L. Colombo, B. Davaji, and C. Cassella, “A Non-volatile Threshold Sensing System Using a Ferroelectric Hf0.5Zr0.5O2 Device and a LiNbO3 Microacoustic Resonator”, The 36th International Conference on Micro Electro Mechanical Systems (IEEE MEMS 2023). (Selected as a finalist for the Best Student Paper Award)
  11. H. M. E. Hussein and C. Cassella, “A CMOS-Compatible Signal-To-Noise Enhancer Enabling a Filter-less 14.5 dB C/IMD Boost in Slowly Modulated LTV RF Circuits“, The European Microwave Conference (EuMW 2022).
  12. O. Kaya, X. Zhao, and C. Cassella, “Frequency Reprogrammable Al0.7Sc0.3N Acoustic Delay Line with up to 13.5 % Bandwidth”, The 2022 Joint Conference of the European Frequency & Time Forum and the IEEE International Frequency Control Symposium (EFTF-IFCS 2022).(EFTF-IFCS 2022 Best Student Paper Award Finalist)
  13. X. Zhao, O. Kaya, M. Pirro, S. Kang, and C. Cassella, “Improving Thermal Linearity and Quality Factor of Al72Sc28N Contour Mode Resonators Using Acoustic Metamaterials Based Lateral Anchors”, The 2022 Joint Conference of the European Frequency & Time Forum and the IEEE International Frequency Control Symposium (EFTF-IFCS 2022).(EFTF-IFCS 2022 Best Student Paper Award Winner)
  14. O. Kaya, X. Zhao and C. Cassella, “An Aluminum Scandium Nitride (Al0.64Sc0.36N) Two-Dimensional-Resonant-Rods Delay Line with 7.5% Bandwidth and 1.8 dB Loss”, The 35th International Conference on Micro Electro Mechanical Systems (IEEE MEMS 2022).
  15. H. M. E. Hussein, L. Colombo and C. Cassella, “A LINBO3-Based Subharmonic Tag For Passive And Far-Field Identification“, The 35th International Conference on Micro Electro Mechanical Systems (IEEE MEMS 2022).
  16. X. Zhao, O. Kaya, M. Pirro, G. Michetti, C. Colombo, and C. Cassella, “An Ultra-Low Impedance 4.8 GHz Al72Sc28N Resonant Rods Resonator With a Record kt2 of 21.2%“, IEEE International Microwave Filter Workshop (IMFW 2021).
  17. H. M. E. Hussein, L. Colombo and C. Cassella, “Parametric Acoustic-Based Passive Transponders for ultra-Sensitive Temperature and Temperature-Threshold Sensing“, the European Frequency and Time Forum and the IEEE International Frequency Control Symposium (EFTF-IFCS 2021). (EFTF-IFCS 2021 Best Student Paper Award Winner)
  18. H. M. E. Hussein and C. Cassella, “A 2.3 GHz −10.8 dBm Threshold Parametric Frequency Selective Limiter with 1.7 dB Loss“, the International Microwave Symposium (IMS 2021) (Selected as a finalist for the 3MT competition)
  19. H. M. E. Hussein and C. Cassella, “Giant Sensitivity through Fully-Passive and Chip-Less Parametric Temperature Sensors“, 2020 IEEE Sensors, Rotterdam, Netherlands, 2020, pp. 1-4.
  20. X. Zhao and C. Cassella, “Slow Waves in Metamaterial Two-Dimensional-Resonant-Rods (2DRRs) Delay Lines“, IEEE International Ultrasonics Symposium (IUS) 2020
  21. X. Zhao and C. Cassella, “A Comparative Study on the Performance of Aluminum Nitride Thickness- and quasi-Thickness Extensional Mode Resonators“, IEEE International Ultrasonics Symposium (IUS) 2020
  22. Garibaldi, G., Colombo, L., Bersano, F., Cassella, C., Rinaldi, M., “Investigation on the Impact of Scandium-doping on the kt2of ScxAl1-xN Cross-sectional Lamé Mode Resonators”,IEEE International Ultrasonic Symposium, 2020.
  23. Colombo, L., Michetti, G., Pirro, M., Cassella,C., Piazza, G., Rinaldi, M., “Zero Power X-cut LiNbO3 MEMS-based Radio Frequency Rectifier”,IEEE International Frequency Control Symposium, 2020.
  24. Colombo, L., Michetti, G., Pirro, M., Cassella, C., Piazza, G., Rinaldi, M., “Optimization of a Series-Parallel MEMS Resonators Configuration for Passive Voltage Amplification in Wake-Up Radios”,IEEE International Frequency Control Symposium, 2020.
  25. X. Zhao, B. Herrera and C. Cassella, “Record-High KT2 Exceeding 7.4% Through Low-Impedance Lithographically Defined Resonant Rods in Aluminum Nitride Thin Plates” 2020 IEEE 33rd International Conference on Micro Electro Mechanical Systems (MEMS), Vancouver, BC, Canada, 2020, pp. 1278-1280.
  26. Pop, F., Herrera, B., Cassella, C., & Rinaldi, M., “Novel Phased-Array Platform based on Directly Modulated Ultrasonic Transducers.”2019 IEEE International Ultrasonics Symposium (IUS), 2019.
  27. Herrera, B., Pop, F., Cassella, C., & Rinaldi, M. (2019, October)., “PMUT-Enabled Underwater Acoustic Source Localization System.”, 2019 IEEE International Ultrasonics Symposium (IUS), 2019.
  28. Herrera, B., Pop, F., Cassella, C., & Rinaldi, M., “AlN PMUT-based ultrasonic power transfer links for implantable electronics. 2019 20th IEEE International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII), 2019.
  29. Cassella, C., Pirro, M., Michetti, G., Rinaldi, M., “Ultra-High-Isolation Nonreciprocal Acoustic Filter”, IEEE International Microwave Symposium (IMS), 2019 (accepted for publication).
  30. Zhao, X., Cassella, C., “On the Coupling Coefficient of AlScN-based Piezoelectric Acoustic Resonators“, IEEE International Frequency Control Symposium, 2019 (accepted for publication).
  31. Flavius Pop, Bernard Herrera, William Zhu, Meruyert Assylbekova, Cristian Cassella, Nicole McGruer, Matteo Rinaldi, “Zero-Power Acoustic Wake-Up Receiver Based On DMUT Transmitter, PMUTs Arrays Receivers and MEMS Switches For Intrabody Links”, IEEE Transducers-Eurosensors, 2019 (accepted for publication).
  32. Bernard Herrera, Flavius Pop, Cristian Cassella, Matteo Rinaldi, “AlN PMUT-Based Ultrasonic Power Transfer Links for Implantable Electronics”, IEEE Transducers-Eurosensors, 2019 (accepted for publication).
  33. F. Pop, B. Herrera, C. Cassella and M. Rinaldi, “pMUT-based Real-Time (RT) Acoustic Discovery Architecture (ADA) for Intrabody Networks (IN)”, IEEE International Frequency Control Symposium, 2019 (accepted for publication), (Finalist in the Student Best Paper Competition).
  34. F. Pop, B. Herrera, C. Cassella and M. Rinaldi, “Direct Modulation Piezoelectric Micro-Machined Ultrasonic Transducer System (DMUT)”, IEEE MicroElectroMechanical Systems (MEMS), 2019.
  35. B. Herrera, F. V. Pop, C. Cassella, M. Rinaldi, “Frequency Agile PMUT-based Ultrasonic Communication Links”, IEEE MicroElectroMechanical Systems (MEMS), 2019.
  36. M. Pirro, C. Cassella, G. Michetti and M. Rinaldi “Low loss non reciprocal filter for miniaturized RF-front-end platforms”, IEEE International Frequency Control Symposium (IFCS), 2019 (accepted for publication), (Finalist in the Student Best Paper Competition).
  37. Segovia J., C Cassella, “Active and Inactive Frames Improve Figure of Merit of Two Dimensional Mode Resonators”, IEEE International Ultrasonic Symposium, 2018.
  38. G Michetti, C Cassella, F Pop, M Pirro, A Kord, D Sounas, A Alú, M Rinaldi, “A Quasi-LTI Frequency-Selective SAW Circulator”, IEEE International Ultrasonic Symposium, 2018 (Finalist in the Student Best Paper Competition).
  39. M Pirro, C Cassella, G Michetti, G Chen, P Kulik, Y Yu, M Rinaldi, “Novel topology for a non-reciprocal MEMS filter”, IEEE International Ultrasonic Symposium, 2018.
  40. Demirors E, Shi J, Duong A, Dave N, Guida R, Herrera B, Pop F, Chen G, Cassella C, Tadayon S, Rinaldi M.,”The SEANET project: Toward a programmable internet of underwater things.”, IEEE Underwater Communications and Networking Conference (UComms), 2018
  41. G. Chen, C. Cassella, T. Wu, and M. Rinaldi, “Single-Chip Multi-Frequency Wideband Filters Based on Aluminum Nitride Cross-Sectional Lame Mode Resonators with Thick and Apodized Electrodes”, IEEE MicroElectroMechanical Systems (MEMS), 2018.
  42. C. Cassella, M. Assylbekova, W. Z. Zhu, G. Chen, P. Kulik, G. Michetti, N. McGruer and M. Rinaldi, “750 MHz Zero-Power MEMS-Based Wake-Up Receiver With -60 dBm Sensitivity”, Hilton Head Workshop, 2018.
  43. [15] T. Wu, G. Chen, C. Cassella, W. Zhu, M. Assylbekova, M. Rinaldi, N. McGruer, “Design and Fabrication of AlN RF MEMS Switch for Near-Zero Power RF Wake-Up Receivers”, IEEE Sensors, 2017.
  44. K.L. Foster, B. Gibson, K.R. Qalandar, G. Piazza, C. Cassella, “Quality Factor and Phase Noise Improvements in MEMS Resonators and Oscillators”, IEEE Frequency Control Symposium, 2017.
  45. Yao Yu, Dimitrios Sounas, Cristian Cassella, Zhenyun Qian, Ahmed Kord, Andrea Alu and Matteo Rinaldi, “Microelectromechanical Resonant Circulator (MIRC) based on Modulating MEMS Resonators Using RF Switches”, Napa workshop 2017.
  46. Guofeng Chen, Cristian Cassella, Tao Wu, Zhenyun Qian, and Matteo Rinaldi, “Aluminum Nitride Cross-Sectional Lamé-Mode Resonators with Figure-of-Merit >134 and Frequency tunability of 70 mhZ/µM”, Napa workshop 2017.
  47. Rajaram, V., Qian, Z., Kang, S., Cassella, C., McGruer, N., Rinaldi, M., “Microelectromechanical Detector Of Infrared Spectral Signatures With Near-Zero Standby Power Consumption”, IEEE Transducers, 2017.
  48. Cassella, C., Chen, G., Wu, T, “Low Impedance Arrays Of Coupled Cross-Sectional Lamé Mode Resonators With High Figure Of Merit In Excess Of 100”, IEEE Transducers, 2017.
  49. Cassella, C., Wu, T.,Zhu, W.,Hummel, G., McGruer, N., Rinaldi, M., “Fully Passive Microelectromechanical Near Zero Power Wake Up Receiver for Ultra Low Power Applications”, GOMACTech, 2017.
  50. Qian, Z., Kang, S., Rajaram, V., Cassella, C.,Mcgruer, N., Rinaldi, M., “Light-Actuated Micromechanical Relays for Zero-Power Infrared Detection”, GOMACTech, 2017.
  51. Cassella, C., Chen.G, Qian,Z.,Hummels, G.,Rinaldi,” Unprecedented Figure Of Merit In Excess Of 108 in 920 Mhz Aluminum Nitride Cross-Sectional Lamé Mode Resonators Showing kt2 in Excess of 6.2%”, Hilton Head Workshop, 2016.
  52. Cassella, C., Chen.G, Qian,Z.,Hummels, G.,Rinaldi,” 920 Mhz Aluminum Nitride Cross-Sectional Lamé Mode Piezoelectric MEMS Transformers with High Open-Circuit Voltage Gain in Excess of 39”, Hilton Head Workshop, 2016.
  53. Cassella, C. and Piazza, G., “Thick Aluminum Nitride Contour-Mode Resonators Mitigate Thermoelastic Damping”, IEEE International Frequency Control Symposium (IFCS), 2016.
  54. Cassella, C. et al., “Cross-Sectional Lame Mode Filters for UHF Wideband Applications”, IEEE International Frequency Control Symposium (IFCS), 2016.
  55. Chen, G., Cassella, C. and Rinaldi, M., “Aluminum Nitride Cross-Sectional Lame Mode Resonators with 260 MHz Lithographic Tuning Capability and High kt2>4%”, IEEE International Frequency Control Symposium (IFCS), 2016.
  56. Cassella,C., Rinaldi, M.,” Cross-Sectional Lamé Mode Contiguous Filters For Next-Generation LTE-Advanced Platforms”, IEEE International Microwave Symposium (IMS), 2016.
  57. Cassella,C., Qian,Z.,Hummels,G.,Rinaldi,M.,“1.02 GHz Aluminum Nitride Cross-Sectional Lame Mode with high kt2 exceeding 4.6%”, In Micro Electro Mechanical Systems (MEMS), 2015.
  58. J. Segovia-Fernandez, C. Xu, C. Cassella, G. Piazza, “An alternative technique to Perfectly Matched Layers to model anchor losses in MEMS resonators with undercut suspensions”, Solid-State Sensors, Actuators and Microsystems, Transducers, 2015.
  59. Gibson, B., Cassella, C., Qalandar, K., Turner, K., Piazza, G., “Analysis of the Impact of Release Area on the Quality Factor of Contour-Mode Resonators by Laser Doppler Vibrometry”, IEEE Frequency Control Symposium, 2015.
  60. Cassella, C., Miller, N., Segovia-Fernandez, J., & Piazza, G. (2014, January). “Parametric filtering surpasses resonator noise in ALN contour-mode oscillators.” In IEEE Micro Electro Mechanical Systems (MEMS), 2014.
  61. [33] Cassella, C., Cremonesi, M., Frangi, A. , Piazza, G., “Q optimization via quarter wave acoustic transformers in the body of AlN contour-mode resonators”, Hilton Head Workshop, 2014.
  62. Cremonesi, M., Frangi, A., Cassella, C., Piazza, G., “Enhancement of Quality Factor of AlN Contour-Mode Resonators by Acoustical Reflection: Numerical Design and Experimental Investigation”, In IEEE Eurosensors, 2014.
  63. Cassella, C., Segovia-Fernandez, J., Piazza, G., Cremonesi, M., & Frangi, A. (2013, July). “Reduction of anchor losses by etched slots in aluminum nitride contour mode resonators.” In IEEE European Frequency and Time Forum & International Frequency Control Symposium (EFTF/IFC), 2013.
  64. Segovia-Fernandez, J., Cassella, C., and Piazza, G.. “Close-in phase noise reduction in an oscillator based on 222 MHz non-linear contour mode AlN resonators.” European Frequency and Time Forum & International Frequency Control Symposium (EFTF/IFC), 2013 Joint. IEEE, 2013 (Best-Paper-Award).
  65. Segovia-Fernandez, J., Cremonesi, M., Cassella, C., Frangi, A., & Piazza, G. (2013, June). “Experimental study on the impact of anchor losses on the quality factor of contour mode AlN resonators.” In IEEE Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013.
  66. Cassella, C., Segovia-Fernandez, J., and Piazza, G.,. “Segmented electrode excitation of aluminum nitride contour mode resonators to optimize the device figure of merit.” IEEE Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013.
  67. Piazza, G., Tazzoli, A., Miller, N., Segovia, J., Cassella, C., Koo, J., … & Palmer, T. (2013, July). “Dynamics of microscale thin film AlN piezoelectric resonators enables low phase noise UHF frequency sources.”, (IEEE EFTF/IFC), 2013.
  68. Tazzoli, A., Piazza, G., Rinaldi, M., Segovia, J., Cassella, C., Otis, B., … & Felmetsger, V. (2012, May). Piezoelectric nonlinear nanomechanical temperature and acceleration insensitive clocks. In SPIE Defense, Security, and Sensing (pp. 83730A-83730A). International Society for Optics and Photonics, 2012.

Patents

  1. Cristian Cassella, Matteo Rinaldi, Hussein M. E. Hussein, “Subharmonic Tags For Remote Continuous and Threshold Sensing”
  2. Cristian Cassella, Nicolas Casilli, Onurcan Kaya, Philip X.-L. Feng, and Tahmid Kaisar filed a U.S. Provisional Patent Application-63/429,094 titled “Nonvolatile State Configuration of Nano-Watt Parametric Ising Spins through Ferroelectric Varactors for Quantum-like Optimization and Computation“
  3. Cristian Cassella, Nicolas Casilli, and Luca Colombo filed a U.S. Provisional Patent Application-63/419,683 titled “Single Antenna Subharmonic Tags“
  4. Cristian Cassella and Hussein Hussein filed a U.S. Provisional Patent Application-63/342,037 titled “Subharmonic Tags for Localization, Ranging and Navigation in GPS-denied Environments“.
  5. Matteo Rinaldi and Cristian Cassella “Piezoelectric Cross-Sectional Lame Mode Transformer“, Northeastern University, Boston (MA), US Patent No. 11,158,783.
  6. Cristian Cassella and Onurcan Kaya filed a U.S. Provisional Patent Application-63/249,569 titled Two-Dimensional Resonant Rods-Based Delay Line With High Bandwidth.
  7. C.Cassella, Hussein, H., “Ultra-High-Frequency Subharmonic Tags for Passive and Far-Field Identification”, US Provisional Patent Application No. 63/257,075
  8. C.Cassella, X. Zhao, “Two-Dimensional Rod Resonator for RF filtering”, US Non-Provisional Patent Application No. 17/097,289, 2020
  9. C.Cassella, “High Quality Factor Integrated Acoustic Resonant Metamaterials with Giant Frequency Tuning Range”, Non-Provisional Patent Application No. CT/US2020/047638, 2020
  10. C.Cassella, Hussein, H., “Acoustic-Based Passive Transponder System for Continuous Sensing and Threshold Sensing”, US Provisional Patent Application No. 63/116,958, 2020
  11. M.Rinaldi, C.Cassella, ZhenyunQian, Yu Hui, “Nano-and Micro-Electromechanical Resonators”, Northeastern University, Boston (MA), US Patent Application No. 14969,948. Awarded on 04/01/2016.
  12. M.Rinaldi, N. McGruer, A.Duwel, M.Weinberg, R.Egri, C.Cassella, Northeastern University/Dreper, Boston (MA), “Zero-Power Radio Frequency Receiver”, US Patent Application No. 15/290,972 . Awarded on 10/10/2017.
  13. C.Cassella, M.Rinaldi, “Cross-sectional Lame mode piezoelectric transformer”, Northeastern University, Boston (MA), US Patent Application No. 16/056447.
  14. C.Cassella, G. Piazza, “Two-Dimensional-Mode-Resonators for Frequency Generation and Filtering Applications”, Carnegie Mellon University, Pittsburgh (PA), US Patent Application No. 25296510. Awarded on 08/09/2020
  15. C.Cassella, M. Rinaldi, A.Alu, A. Kord, D. Sounas, “MicroElectromechanical Magnetofree Circulator”, Northeastern University, Boston (MA), and University of Texas, Austin (TX), No. 18/0138889A1.

Books

  1. C.Cassella, “Techniques For Phase Noise Evasion In VHF MEMS Oscillators: Novel Linear And Nonlinear Approaches Towards More Efficient Radio-Frequency Front-Ends”, Lambert Publishing (2016).