Assistant Professor – Electrical Engineering Department
Sharif University of Technology, Tehran, Iran
Millimeter-wave System-in-Package Design and Diagnosis
Diagnosis of complex microwave and millimeter-wave systems is an important step in product design for industrial application, which requires a significant amount of time and money. This is more critical for System- in-Package (SiP) applications, where a high component integration density increases the risk of failure. This talk presents a sequence of affordable methods applied to diagnose a millimeter-wave system-in-package. The module used in this work is a 60 GHz transceiver with a waveguide interface, designed to transmit 8 dBm of saturated power. The first measured output power was 3 to 6 dB below the desired value over the 60 GHz band. Thus, all parts of the module were thoroughly investigated to detect the cause of power drop. Using powerful 3D EM simulation tools, power leakage and cavity modes in the module structures are identified and verified by S-parameter measurements. Scanning Electron Microscopy imaging is used to capture high–resolution images of the substrate cross section and compare it with the dimensions used in design phase. Moreover, Focused Ion Beam (FIB) milling is used to isolate the 60 GHz die from the rest of the package and measure its performance. At the end an algorithm is proposed for the diagnosis and fault detection of mm-wave system-in-packages.
Dr. Mohammad Fakharzadeh (SM’12) received the M.Sc. degree in electrical engineering from Sharif University of Technology, Tehran, Iran, in 2002 and the PhD degree in electrical engineering from the University of Waterloo, ON, Canada, in 2008 with the outstanding achievement in graduate studies. He is currently an Assistant Professor in the Electrical Engineering department, Sharif University of Technology, Tehran, Iran, developing low-cost phased array transceivers and millimeter-wave imaging systems. Prior to that he was managing the antenna and packaging group at Peraso Technologies, Toronto, ON, Canada, designing millimeter-wave solutions for portable electronic devices and small cell backhaul. He has more than 15 years of experience in design and implementation of phased-array antenna systems and millimeter-wave technology, particularly novel antenna and package design. He has authored over 50 scientific papers and 10 US patents. Dr. Fakharzadeh is the recipient of the 2011 NSERC post-doctoral fellowship award.
Invited by professor S. Safavi-Naeini.