Date & Time: Monday, 18 January, 2021, 8:00 am – 11:30 am Eastern
1) 6G Research: Challenges and opportunities
In order to greatly increase the data rate, mm-wave 6G must embrace element level digital beamforming in order to achieve the performance of sub-6 GHz links. However, the wider bandwidth at mm-wave frequencies (400 MHz, 800 MHz, 1200 MHz), and the much smaller space available per unit cell, results in formidable challenges for mm-wave digital beamforming arrays. Along with many other aspects related to 6G, this workshop will discuss the advances in ADCs, PAs and transceivers required to achieve digital beamforming for 6G.
Digital Beamforming for 6G: Much More than THz Links
Gabriel M. Rebeiz, UC-San Diego
Terahertz for 6G: Opportunities and Challenges
Gary Xu, Samsung Research
Emerging AI Processing for 6G Radios
Young-Kai (Y.K), DARPA
100-300GHz Wireless: Transistors, ICs, Packages and Systems.
Mark Rodwell, UC-Santa Barbara
Bridging the Gap between Antennas and AI - a 6G Vision
Bodhisatwa Sadhu, IBM T.J. Watson Research
2) 5G Power Amplifiers
The growing demand for high data rate, longer battery life and low latency is pushing the transition from 4G Long-Term Evolution (LTE) to 5G. There is a partition of the 4G/5G RF systems using advanced low feature nodes for 4G/5G modems and transceivers and the other RF and analog functions being integrated into several Front End Modules (FEMs). The FEMs will integrate power amplifiers, switches, couplers, tuners and active acoustic filters. These will cover more than 50 LTE bands from 600MHz to 6GHz as well mmWave. The workshop will cover practical design aspects for 5G FEMS with emphasis for power amplifiers as well the technologies involved into these designs.
Sub-6GHz 5G Front End Modules for Cellular Applications
Florinel Balteanu, Skyworks
Power Amplifiers for 5G mmwave and Automotive Radar
Shafi Syed, GLOBALFOUNDRIES
Recent Advances in Microwave Power Amplifiers
Pre-Layout Electro-Thermal Co-Simulation for Accurate Estimation of Thermal Coupling in Power Amplifiers
Ted Anderson, GLOBALFOUNDRIES
3) Reflectionless Filters
Filters are fundamental signal processing electric components and therefore are crucial building blocks in modern RF/wireless systems. Filters are frequency-selective networks, which are used to remove undesirable-frequency portions of input signals that do not fall within their passband. All filters, ideally, behave like transparent networks to signals with frequency components inside their passband(s). However, not all filters act similarly in their stopband(s). Reﬂectionless ﬁlters are a class of networks which ideally exhibit like always-matched circuits at all ports and at all frequencies. In reﬂectionless ﬁlters, input signals are transferred to another port if they fall inside the passband(s) or are absorbed if appear inside the stopband(s). Hence, all ports’ reflection coefficients are always zero. This has led to a resurgence of modern development eﬀorts in absorptive ﬁltering that spans a wide range of approaches and technologies. This workshop review the basics of reflectionless filters and provide examples of recent developments.
Coupled-Ladder Topologies for Reflectionless Filters
Matt Morgan, National Radio Astronomy Observatory
Avoiding RF Isolators: Reflectionless Microwave Filtering Components for Advanced RF Front-Ends
Roberto Gomez-Garcia, University of Alcalá & Dimitra Psychogiou, University of Colorado-Boulder
Rigorous design methods for reflectionless filters
Juseop Lee & Jongheun Lee, Korea University
Joint ARFTG-RWW 2021 Workshop
Date & Time: Friday 22 January, 2021, 8:00-12:00 am Eastern
4) Modeling and Design Tools for Accelerated Design of 5G GaN PAs
Organizer: Nicholas Miller, AFRL
This workshop will review advances in the nonlinear device modeling and characterization of GaN HEMTs to support the accelerated design of 5G base stations. Both the extraction of ASM-HEMT and MIT Source based model will be discussed. Comparison of measurements with NVNA large-signal measurement results will be reported. Characterization and modeling of traps will be discussed. Finally an embedding ASM-HEMT model for the accelerated design of GaN PAs will be presented.
Physics-based compact modeling of charge transport in ultra-scaled GaN HEMTs for RF applications
Shaloo Rakheja, University of Illinois
From Poisson Equation to Power Amplifiers: Accurate Non-linear RF Models for GaN with Physics-based ASM-HEMT compact model
Sourabh Khandelwal, University of Florida
GaN HEMT Modeling for RF Applications using Advanced Circuit Extraction Tools and Fermi Kinetics Transport
Nicholas Miller, Air Force Research Laboratory
ASM-HEMT Embedding Model for Accelerated Design of PAs
Miles Lindquist, P. Roblin and N. Miller, Ohio State University and AFRL
MVSG modeling framework to enable GaN device-circuit co-design for PA applications
Ujwal Radhakrishna, Texas Instrumentso
5) Technology for CubeSats and COTS for Space
CubeSats contributed significantly to the success of “New Space” by setting standards in dimensions, as well as a more recent effect by defining electrical interface standards. By this way launcher adaptors, as well as subsystems or components from different suppliers can be used and integrated at limited efforts. Thus a broad spectrum of parts is available to the CubeSat community and developers can focus on their specific specialties.
CubeSats typically employ commercial of the shelf (COTS) components, taking advantage of most recently technology innovations and extreme miniaturization. Nevertheless, this cannot be done in a naïve way, as the unavoidable space radiation affects the electronics. Appropriate means need to be implemented in order to guarantee required availability and lifetime for the satellites. Here redundancy concepts in combination with fault detection, identification and recovery (FDIR) algorithms based on advanced filtering and control methods are supporting implementation of a reliable system, compensating the higher noise susceptibility of miniaturized systems.
Nowadays functionalities like orbit control by miniature propulsion systems and precise attitude control become available at CubeSat level. This enables data acquisition via distributed, networked sensor systems self-organized in a formation. Related technologies used (relative navigation, inter-satellite links, etc.) and technology perspectives enabled by such formations will be outlined.
In this workshop, realization of the above principles in concrete missions of the last 15 years will be outlined by earlier missions like UWE-1 (launched 2005; objective: internet in space), UWE-2 (2009; attitude and orbit determination), UWE-3 (2013; attitude control), UWE-4 (2018; position and orbit control), NetSat-1 to -4 (2020; formation demonstration) and future application missions based on formation principles like TOM (2021; 3 satellites for Earth observation by photogrammetric methods), CloudCT (2022; 10 satellites for characterizing the interior of clouds by computed tomography methods).
Technology for CubeSats and COTS for Space
Prof. Dr. Schilling, Robotics and Telematics at University Würzburg