Davis Advanced RF Technologies Lab

Home | People-Openings | Teaching | Research-Publications | UAV Lab | Outreach | Facilities | Resources |

News

» [07 Mar 2017] » DART Lab Awarded NSF STTR Phase II Project on Developing a Radar-based Wearable Heart Health Monitoring Device
» [08 Nov 2016] » DART Lab to Participate in DARPA SPAR program
» [24 Aug 2016] » DART Lab Awarded a Humanitarian Innovation Fund Grant on Developing Autonomous Aerial Vehicles for Unexploded Ordnance Detection
» [27 Jan 2016] » DART Lab Awarded a Catalyst Foundation Supplementary Grant on Developing an Extremely Low Power RF Wake-up Front-end
» [01 Nov 2015] » DART Lab to Participate in DARPA N-Zero program
» [16 Jun 2015] » James Chen awarded IEEE MTT-S Undergraduate Fellowship

email | GitHub

Welcome to the website of the Davis Advanced RF Technologies (DART) lab

We are a group of researchers with a keen interest in many exciting areas of high frequency electronics. Our research interests include:

Critical to our scientific research efforts is a pursuit of fundamental understanding of the physics and engineering principles of high frequency electronics. A major mission of our work is to formulate and disseminate such understanding through university education as well as community outreach.

A postdoc researcher position is available immediately. More details can be found here .
A Ph.D. position is available for Fall 2017. Strong analytical capabilities and a background in analog and/or radio frequency IC are preferred.
  1. Bo Yu, Yu Ye, Xuan Ding, Xiaoguang Liu, Jane Q. Gu, "Sub-THz Interconnect for Planar Chip-to-Chip Communications,"
  2. Yuhao Liu, Yusha Bey, Xiaoguang Liu, "High-Power High-Isolation RF-MEMS Switches with Enhanced Hot-switching Reliability Using A Shunt Protection Technique,"
  3. Jeronimo Segovia-Fernandez, James Do, Xiaonan Jiang, Yuhao Liu, Julius M. Tsai, Hooman Rashtian, Xiaoguang Liu, David A. Horsley, "Monolithic AlN MEMS-CMOS Resonant Transformer for Wake-up Receivers,"
  4. Yingsong Li, Songjie Bi, Xiaoguang Liu, "A Modified Bow-Tie Antenna for Contact-Based Heartbeats Detection Applications,"
  5. Kai Yu, Xiaoguang Liu, Yingsong Li, "Mutual Coupling Reduction of Microstrip Patch Antenna Array Using Modified Split Ring Resonator Metamaterial Structures,"
  6. Kai Yu, Yingsong Li, Xiaoguang Liu, "A High Gain Patch Antenna Using Near Zero-Index Metamaterial Coating,"
  7. Scott Block, Xiaonan Jiang, Can Cui, Jeronimo Segovia Fernandez, Rajeevan Amirtharajah, David Horsley, Hooman Rashtian, Xiaoguang Liu, "A 100-nW CMOS Wake-Up Receiver with -60dBm Sensitivity Using AlN High-Q Piezoelectric Resonators,"
  8. Md. Naimul Hasan, Xiaoguang Liu, "Tunable RF Front-end Filter with Wideband Blocker Suppression for Multi-Standard Applications,"
  9. Hao Wang, Daniel Kuzmenko, Bo Yu, Yu Ye, Jane Gu, Hooman Rashtian, Xiaoguang Liu, "A Compact 213-GHz CMOS Fundamental Oscillator with 0.56 mW Output Power and 3.9% Efficiency using a Capacitive Transformer,"
  10. Bo Yu, Yu Ye, Xuan Ding, Xiaoguang Liu, Jane Gu, "Dielectric Waveguide Based Multi-Mode sub-THz Interconnect Channel for High Data-Rate High Bandwidth-Density Planar Chip-to-Chip Communication,"
  11. Bo Yu, Yu Ye, Xuan Ding, Xiaoguang Liu, Jane Gu, "High Energy-Efficiency High Bandwidth-Density Sub-THz Interconnect for the Last-Centimeter Chip-to-Chip Communications,"
  12. Md Naimul Hasan, Mahmoud Nafe, Xiaoguang Liu, "Design of All Passive Blocker-Tolerant Reconfigurable RF Front-end Filter,"
  13. Hao Wang, Akash Anand, Xiaoguang Liu, "A Miniature 800-1100-MHz Tunable Filter with High-Q Ceramic Coaxial Resonators and Commercial RF-MEMS Tunable Digital Capacitors,"
  14. Y. Wang, B. Tobias, Y.-T. Chang, J.-H. Yu, M. Li, F. Hu, M. Chen, M. Mamidanna, T. Phan, A.-V. Pham, J. Gu, X. Liu, Y. Zhu, C.W. Domier, L. Shi, E. Valeo, G.J. Kramer, D. Kuwahara, Y. Nagayama, A. Mase, and N.C. Luhmann Jr., "Millimeter-wave Imaging of Magnetic Fusion Plasmas, Technology Innovations Advancing Physics Understanding,"
  15. Md. Naimul Hasan, Jane Q. Gu, and Xiaoguang Liu, "Tunable Blocker-Tolerant RF Front-end Filter with Dual Adaptive Notches for Reconfigurable Receivers,"
  16. Akash Anand and Xiaoguang Liu, "Reconfigurable Planar Capacitive Coupling in Substrate-Integrated Coaxial-Cavities Filters,"
  17. Yuhao Liu, Yusha Bey, and Xiaoguang Liu, "Extension of the Hot-Switching Reliability of RF-MEMS Switches Using A Series Contact Protection Technique,"
  18. Fengqi Hu, Meijiao Li, Calvin W. Domier, Xiaoguang Liu, Neville C. Luhmann, Jr., "Microwave Imaging Radar Reflectometer System Utilizing Digital Beam Forming,"
  19. Bo Yu, Yu Ye, Xiaoguang Liu, and Qun Jane Gu, "Microstrip line based sub-THz interconnect for high energy-efficiency chip-to-chip communications,"
  20. Bo Yu, Yu Ye, Xiaoguang Liu, and Qun Jane Gu, "Sub-THz interconnect channel for planar chip-to-chip communication,"
  21. Bo Yu, Yuhao Liu, Yu Ye, Xiaoguang Liu, and Qun Jane Gu, "Low-loss and Broadband G-Band Dielectric Interconnect for Chip-to-Chip Communication,"
  22. Md. Naimul Hasan, Jane Q. Gu, and Xiaoguang Liu, "Tunable Blocker-Tolerant RF Front-end Filter with Dual Adaptive Notches for Reconfigurable Receivers,"
  23. Md. Naimul Hasan, Qun Jane Gu, and Xiaoguang Liu, "Reconfigurable Blocker-Tolerant RF Front-End Filter with Tunable Notch for Active Cancellation of Transmitter Leakage in FDD Receivers,"
  24. James T. S. Do and Xiaoguang Liu, "A High-Q W Band Tunable Bandpass Filter,"
  25. James Chen, Marvin D. Benge, Akash Anand, Hjali Sigmarsson, and Xiaoguang Liu, "An Evanescent-Mode Tunable Dual-band Filter with Independently-Controlled Center Frequencies,"
  26. Akash Anand and Xiaoguang Liu, "Metallic Air Cavities Integrated with Surface Mount Tuning Components for Tunable Evanescent-Mode Resonators,"
  27. Dimitrios Peroulis, Akash Anand, Joshua Azariah Small, Xiaoguang Liu, Muhammad Shoaib Arif, Mihal Sinani, "Tunable cavity resonator having a post and variable capacitive coupling,"
  28. Songjie Bi, Juan Zeng, Marzhan Bakbalanova, and Xiaoguang Liu, "Contact-Based Radar Measurement Of Cardiac Motion - A Position And Polarization Study,"
  29. Hooman Rashtian, Jane Q. Qun, and Xiaoguang Liu, "A 200-GHz Triple-push Oscillator in 65-nm CMOS with Design Techniques for Enhancing DC-to-RF Efficiency,"
  30. Bo Yu, Yuhao Liu, Yu Ye, Junyan Ren, Xiaoguang Liu, and Qun Jane Gu, "High Efficiency Micromachined Sub-THz Channels for Low Cost Interconnect for Planar Integrated Circuits,"
  31. Young Seek Cho, Himanshu Joshi, Xiaoguang Liu, Hjalti H. Sigmarsson, William J. Chappell, and Dimitrios Peroulis, "Development of 6–12 GHz evanescent–mode two–pole low–loss tunable bandpass filter,"
  32. Dimitrios Peroulis, Adam Fruehling, Joshua Azariah Small, Xiaoguang Liu, Wasim Irshad, Muhammad Shoaib Arif, "Tunable Cavity Resonator Including A Plurality of MEMS Beams,"
  33. Md. Naimul Hasan, Sudhir Aggarwal Qun Jane Gu, and Xiaoguang Liu, "Tunable N-Path RF Front-end Filter with an Adaptive Integrated Notch for FDD/Co-Existence,"
  34. Yuhao Liu, Hao Wang, Yusha Bey, and Xiaoguang Liu, "A Novel RF-MEMS Shunt Capacitive Switch Design for Dielectric Charging Mitigation,"
  35. Meijiao Li and Calvin Domier and Xiaoguang Liu and Neville Luhmann, "Wide Band MM-Wave, Double-sided Printed Bow-Tie Antenna for Phased Array Applications,"
  36. Qianteng Wu, and Xiaoguang Liu, "A 3.4-3.6-GHz High Efficiency Gallium Nitride Power Amplifier Using Bandpass Output Matching Network,"
  37. Himanshu Joshi, Hjalti Hreinn Sigmarsson, Dimitrios Peroulis, William J Chappell, Xiaoguang Liu, "Tunable Evanescent-Mode Cavity Filter,"
  38. Danqing Fu, Yusha A. Bey, Calvin Domier, Jr. Neville C. Luhmann, and Xiaoguang Liu, "A Q-Band RF-MEMS Tapered True Time Delay Line for Fusion Plasma Diagnostics Systems,"
  39. Akash Anand, and Xiaoguang Liu, "Capacitively Coupled Coaxial-Cavity Bandstop Filters with Tunable Center Frequency and Bandwidth,"
  40. Xiaoguang Liu, "Tunable RF and Microwave Filters,"
  41. Songjie Bi and Dennis Matthews and Xiaoguang Liu, "An experimental study of 2-D cardiac motion pattern based on contact radar measurement,"
  42. James T. Do, and Xiaoguang Liu, "A 75-110GHz Micro-Machined High-Q Tunable Filter,"
  43. Chan Ho Kim, Kai Chang, and Xiaoguang Liu, "Varactor Tuned Ring Resonator Filter With Wide Tunable Bandwidth,"
  44. Qi Jiang, Danqing Fu, Fengqi Hu, Meijiao Li, Calvin W. Domier, Xiaoguang Liu, Neville C. Luhmann, "Mixer and beamforming advances in millimeter-wave imaging,"
  45. Md. Naimul Hasan, Sudhir Aggarwal Qun Jane Gu, and Xiaoguang Liu, "Reconfigurable N-path RF front-end filter with improved blocker rejection,"
  46. Joshua Small, Adam Fruehling, Anurag Garg, Xiaoguang Liu, and Dimitrios Peroulis, "Real-time DC-dynamic biasing method for switching time improvement in severely underdamped fringing-field electrostatic MEMS actuators,"
  47. Yuhao Liu, Yusha Bey, and Xiaoguang Liu, "Single-Actuator Shunt-Series RF-MEMS Switch,"
  48. Bo Yu, Yuhao Liu, Xing Hu, Xiaoxin Ren, Xiaoguang Liu, and Qun Jane Gu, "Micromachined Sub-THz Interconnect Channels for Planar Silicon Processes,"
  49. Bo Yu, Yuhao Liu, Xing Hu, Xiaoxin Ren, Xiaoguang Liu, and Qun Jane Gu, "Micromachined Silicon Channels for THz Interconnect,"
  50. Akash Anand, and Xiaoguang Liu, "Substrate-Integrated Coaxial-Cavity Filter With Tunable Center Frequency and Reconfigurable Bandwidth,"
  51. Akash Anand, Yuhao Liu, and Xiaoguang Liu, "Substrate Integrated Octave-Tunable Bandstop Filter with Surface Mount Varactors,"
  52. Yuhao Liu, Akash Anand, and Xiaoguang Liu, "Design of Low Phase-Noise Voltage-Controlled Oscillator Using Tunable Evanescent-Mode Cavity,"
  53. Akash Anand, Joshua Small, Dimitrios Peroulis, and Xiaoguang Liu, "Theory and Design of Octave Tunable Filters with Lumped Tuning Elements,"
  54. Akash Anand, Joshua Small, Muhammad Shoaib Arif, Michael Sinani, Dimitrios Peroulis, and Xiaoguang Liu, "A Novel High-Qu Octave-Tunable Resonator with Lumped Tuning Elements,"
  55. Eric Naglich, Xiaoguang Liu, Dimitrios Peroulis, and William Chappell, "MEMS-Tunable Highly-Loaded Cavity Bandstop Filters for X Band and Beyond,"
  56. Joshua S. Benjestorf, and Xiaoguang Liu, "Non-Mating Connector (NMC) for USB 3.0 - A Quality Waterproof Connection,"
  57. Akash Anand, Joshua Small, Hjalti Sigmarsson, and Xiaoguang Liu, "Tunable RF Filters Based on Radially Loaded Evanescent-mode Cavity Resonators,"
  58. Kenle Chen, Xiaoguang Liu, and Dimitrios Peroulis, "Widely-Tunable High-Efficiency Power Amplifier with Ultra-Narrow Instantaneous Bandwidth,"
  59. Joshua Small, Adam Fruehling, Anurag Garg, Xiaoguang Liu, and Dimitrios Peroulis, "DC-dynamic biasing for >50 switching time improvement in severely under-damped fringing-field electrostatic MEMS actuators,"
  60. Joshua Small, Wasim Irshad, Adam Fruehling, Anurag Garg, Xiaoguang Liu, and Dimitrios Peroulis, "Electrostatic fringing-field actuation for pull-in free RF-MEMS analogue tunable resonators,"
  61. Xiaoguang Liu, Eric Naglich, and Dimitrios Peroulis, "Non-linear Effects in MEMS Tunable Bandstop Filters,"
  62. Xiaoguang Liu, Linda P. B. Katehi, William J. Chappell, and Dimitrios Peroulis, "Power Handling of High-Q MEMS Tunable Evanescent-mode Resonators and Filters,"
  63. Xiaoguang Liu, Adam Fruehling, Linda Katehi, William J. Chappell, and Dimitrios Peroulis, "Capacitive Monitoring of Electrostatic MEMS Tunable Evanescent-mode Cavity Resonators,"
  64. Xiaoguang Liu, Joshua Small, David Berdy, Linda Katehi, William J. Chappell, and Dimitrios Peroulis, "Impact of Mechanical Vibration on the Performance of RF MEMS Evanescent-mode Tunable Resonators,"
  65. Xiaoguang Liu, and Dimitrios Peroulis, "Tunable 3-D MEMS Components for Reconfigurable RF Front-Ends,"
  66. Muhammad S. Arif, Xiaoguang Liu, Wasim Irshad, William J. Chappell, and Dimitrios Peroulis, "A High-Q Magnetostatically-tunable All-silicon Evanescent Cavity Resonator,"
  67. Kenle Chen, Xiaoguang Liu, William J. Chappell, and Dimitrios Peroulis, "Integrated Design of Power Amplifier and Narrowband Filter using High-Q Evanescent-Mode Cavity Resonator,"
  68. Xiaoguang Liu, Kenle Chen, Linda P. B. Katehi, William J. Chappell, and Dimitrios Peroulis, "System-level Characterization of Bias Noise Effects on Electrostatic RF MEMS Tunable Filters,"
  69. Kenle Chen, Xiaoguang Liu, Andrew Kovacs, and Dimitrios Peroulis, "Anti-Biased Electrostatic RF MEMS Varactors and Filters,"
  70. Xiaoguang Liu, Linda P. B. Katehi, and Dimitrios Peroulis, "Novel Dual-Band Microwave Filter using Dual-Capacitively-Loaded Cavity Resonators,"
  71. Xiaoguang Liu, Linda P. B. Katehi, William J. Chappell, and Dimitrios Peroulis, "High-Q Tunable Microwave Cavity Resonators and Filters using SOI-based RF MEMS Tuners,"
  72. Wesley N. Allen, Xiaoguang Liu, and Dimitrios Peroulis, "Hermetically-Sealed Evanescent-mode Resonators Utilizing Packaging as Cavities,"
  73. Xiaoguang Liu, Linda P. B. Katehi, and Dimitrios Peroulis, "Non-toxic Liquid Metal Microstrip Resonators,"
  74. Xiaoguang Liu, Linda P. B. Katehi, William J. Chappell, and Dimitrios Peroulis, "Power Handling Capability of High-Q Evanescent-mode RF MEMS Resonators with Flexible Diaphragm,"
  75. Wesley N. Allen, Joshua Small, Xiaoguang Liu, and Dimitrios Peroulis, "Bandwidth-optimal Single Shunt-capacitor Matching Networks for Parallel RF Loads of Q >1,"
  76. Joshua Small, Xiaoguang Liu, and Dimitrios Peroulis, "Electrostatically Tunable Analog Single Crystal Silicon Fringing Field MEMS Varactors,"
  77. Anurag Garg, Joshua Small, Ajit Mahapatro, Xiaoguang Liu, and Dimitrios Peroulis, "Impact of Sacrificial Layer Type on Thin Film Metal Residual Stress,"
  78. Xiaoguang Liu, Linda P. B. Katehi, William J. Chappell, and Dimitrios Peroulis, "A 3.4-6.2 GHz Continuously Tunable Electrostatic MEMS Resonator with Quality Factor of 460-530,"
  79. Anurag Garg, Joshua Small, Xiaoguang Liu, and Dimitrios Peroulis, "Post-release Displacement Uncertainty of Micro-Cantilevers due to Anchor Over/Under Etching,"
  80. Xin Wang, Hao-Han Hsu, Xiaoguang Liu, Wesley N. Allen, Linda P. B. Katehi, and Dimitrios Peroulis, "Frequency- and Time- Domain Adaptive RF Front-ends and Antennas,"
  81. Xiaoguang Liu, Linda P. B. Katehi, and Dimitrios Peroulis, "MEMS Liquid Metal Through-Wafer Microstrip to Microstrip Transition,"