辛皓

访问学者

E-mail

This email address is being protected from spambots. You need JavaScript enabled to view it.

Visiting Time

2012-03-10 —— 2012-07-10

Research Interests

His primary research interests are in the area of microwave / millimeter wave / THz devices, circuits, antennas and their applications in wireless communication and sensing systems.


Biography

Aug. 2005:

Present: Assistant Professor, Electrical and Computer Engineering Dept. and Physics  Dept., the University of Arizona.  Current research focus is in the area of microwave technologies and solid state physics, including solid state devices and circuits, antennas, passive circuits, properties and applications of new materials such as electromagnetic band gap crystals and carbon nanotubes. 

 

Nov. 2003 – Aug. 2005:

Sr. Multi-Disciplined Principal Engineer at Radar and RF Center and  Advanced Programs / DARPA New Business of Raytheon Missile Systems, Tucson, Arizona. 

             

2000-2003:

Member of technical staff at Rockwell Scientific Company.

• Lead and managed (as program manager and/or principle investigator) research

   effort in electromagnetic band gap structures, monolithic microwave and millimeter wave circuits, microwave and millimeter wave antennas, and their applications in communication and sensor systems.  Lead and managed various government R & D programs including Future Combat System – Communications, Intelligent RF Front-End Systems, etc.  Lead and managed sub-contracting programs for various external industrial companies including Rockwell Collins, Raytheon, TRW, and Boeing. 

• Lead and/or participated in marketing efforts for numerous government and commercial

   contracts.  Member of various internal technology panels including communication technology panel and nano-technology panel.

• Demonstrated first millimeter wave phase shifter and phased array antenna prototype based on innovative electromagnetic band gap structures.

• Demonstrated first tunable millimeter wave band-stop and band-pass filter based on innovative electromagnetic band gap structures

• Designed and characterized various III-V semiconductor devices and microwave circuits based on GaAs PHEMT, GaAs Schottky diode,  InP HEMT, InP HBV, Ferro-electric materials, etc.

• Built, tested, and modeled innovative power harvesting devices based on nano-scale ferro- magnetic materials

 

1997-2000:

Research assistant at MIT physics department and Lincoln Laboratory

•  Measured and modeled nonlinearity of microwave properties of YBCO thin films, including surface impedance, harmonic generation and inter-modulation at 1 – 20 GHz using fundamental and overtone modes of microwave stripline-resonators. 

•  Modeled and measured a microwave phase-shifting device made of a transmission line containing 300 high-TC Josephson junctions in series at 1 – 20 GHz.

•  Investigated microwave resistance and reactance of bi-crystal grain boundary Josephson junctions as a function of dc and rf (4.4 GHz) magnetic fields in a microstrip-resonator setup. Built an oscillator with a microstrip resonator containing a grain boundary Josephson junction.   

•  Designed and fabricated a stripline-resonator with fundamental center frequency of 1.8 GHz and a high power handling (up to 40 dBm) sapphire dielectric-resonator operating at mode TE011 (10.7 GHz) to study the etching/patterning effect on the microwave surface impedance of YBCO thin films.  Measured the microwave surface impedance from 1.8 to 12 GHz by frequency and time domain methods using both types of resonator.  Simulated and compared effects of current distributions on the quality factors for both types of resonator.       

1996-1997:

Part-time technical support of GIS/TRANS, Inc. Improved productivity and payroll database using EXCEL.

1995-1997:

Research assistant at MIT physics department and Lawrence Livermore National Laboratory, worked on a cryogenic microwave cavity experiment searching for dark matter axion.

•  Worked with large tunable microwave cavity at 0.3-1 GHz at 1.5 K. 

•  Experiences also including Monte-Carlo simulation, signal processing, data analysis and electronic hardware.

1997-1998:

Teaching Assistant of Physics of Solids at MIT EECS department.

1995-1996:

Teaching Assistant of Electricity and Magnetism at MIT physics department.

1992-1995:

Research Assistant of Experiment-852 at Brookhaven National Laboratory  (Searching for Exotic Mesons). Experiences including: Electronics, detector building and data analyzing.

1993-1994:

Software designer and programmer for a NSF education project "SIMCALC" at UMASS Dartmouth.

Personal CV