iMAPS New England's 47th Symposium
Technical Chairs: Michael Johnson, MACOM & Dave Saums, DS&A


Thursday, February 18, 2021 from 1:00 PM to 3:00 PM EST
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This is an online event. 



Harvey Smith 
iMAPS-New England 
(508) 826-6033

iNE 47th Symposium Virtual Session C 

February 18, 2021, 1:00-3:00 pm

via ZOOM

There is No-Charge for Attending ... But, Registration With a Valid E-Mail Address is Required..!!

Session C
"RF and Microwave Part II"
Session Chairs
Tom Terlizzi & Chandra Gupta


Final Technical Program

“Advanced mm-wave phased array design”
Dr Jussi Säily, VTT Technical Research Centre of Finland

Abstract: In order to take advantage of the full capability of 5G millimetre wave systems, beam forming is required on both sides of the radio link. Typically a phased array antenna panel consists of several hundreds of antenna elements each having their own power amplifier (PA) and low noise amplifier (LNA). This requires high component integration level into so-called core chips having four or more antenna connections. Commonly used IC technologies are CMOS and SiGe. The antenna element size at millimetre wavelengths (>30 GHz) is small thus enabling large scale antenna arrays and separate TX and RX arrays. Components and antenna elements are integrated together on a low-loss printed circuit board (PCB). Thermal dissipation of the antenna array can be hundreds of watts so advanced thermal management methods must be applied. In this presentation the basic concepts and some 5G and beyond phased antenna array integration examples (both commercial and research) are discussed for different frequencies between 28 - 150 GHz.

“RF Integration - New Highly Integrated Transceiver with RF Front End (RFFE)”
Larry Hawkins, Richardson RFPD, Geneva, IL

Abstract:  Engineers always have the goal to make things smaller, lower power, and higher performance.  They also tend to lack time and resources.  The engineering team at Richardson RFPD has teamed with Analog Devices to introduce a new highly integrated transceiver and have built a RFFE to interface with it.  Our goal is to provide engineers with a small, low power, high performance starting point for their own design to reduce their design time and the amount of resources they need to do the design.

“Electromagnetic Absorber Performance and Testing”
William W Wallace, Cumming Microwave Corporation, Avon, MA

Abstract:  Information concerning the areas of use and performance of Electromagnetic Absorbing material will be covered.  The presentation will include computational electromagnetic (CEM) results and animations detailing the absorption of an incoming plane wave as well as addressing the current measurement standards and material requirements.  Limitations of absorber materials are often seen at high power levels due to the induced thermal load, this too will be addressed in terms of absorbers that are available on the market today.  Also discussed will be more exotic materials not currently produced, including electro restrictive materials.

“Thermal Considerations for High Power GaN RF Amplifiers”
Manuel Romero, Cree/Wolfspeed, Durham, NC

Abstract: The reliability of high-power GaN HEMTs, employed in high power amplifiers, is driven by peak temperatures within the base semiconductor technology. As such, the design engineer must carefully consider the thermal environment presented to a high-power amplifier. This talk will discuss how peak temperatures in the GaN HEMT’s semiconductor translate to its reliability. Thermal properties of leading semiconductor substrates, silicon carbide and silicon, will be compared and the concept of thermal resistance will be introduced. The effect of transistor packaging as well as the importance of proper transistor assembly will also be discussed. Finally, a practical RF high power example will be presented.

SCHEDULE (times approximate)

                    12:45 PM        Check-In to ZOOM Meeting using e-mailed instructions
                      1:00 PM        Introduction - Michael Johnson and Dave Saums

There is NO Charge for attending this meeting however, you must register in advance. You will receive an acknowledgement immediately upon completing the registration form and then, just prior to the meeting, you'll receive an e-mail with log-in instructions, the URL and Password for the Session. We suggest installing the ZOOM Desktop App in advance. 

If you don't receive e-mail instructions or have any questions/issues
contact Harvey Smith: