Articles

April 19, 2022

Linear Polarization Control for Shared Aperture SATCOM Systems at Ku-Band

This paper presents a new phase-shifting duplexer architecture for passive linear polarization control. The duplexer is based on reflective-type phase shifters employing Lange couplers and back-to-back varactor diode configuration, allowing simultaneous polarization rotation, low insertion loss, and high TX-RX isolation...

By Nimrod Ginzberg, Dror Regev, Asher Madjar, Emanuel Cohen

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April 19, 2022

Electronic Quadrature Hybrid Duplexer for Wireless Simultaneous Transmit Receive Operation

This article presents a new four-port electronic device – the directional quadrature hybrid isolator (DQHI). The topology of this duplexer is similar to the four-arm quadrature hybrid (QH) except for a 90° non-reciprocal phase shifter (NRPS) replacing one of the...

By Dror Regev, Erez Zolkov, Nimrod Ginzberg, Shimi Shilo, Doron Ezri, Emanuel Cohen

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April 15, 2022

Universal Virtual Lab: A Fast and Accurate Simulation Tool for Wideband Nonlinear DWDM Systems

We introduce the concept of the universal virtual lab, an extension to the virtual lab platform of [Golani et al. 2016], enabling a fast and accurate simulation of wideband nonlinear DWDM systems. The universal virtual lab is compliant with non-ideal...

By David Dahan, Michael Zarubinsky, Yunhua Liang, Ori Golani, Mark Shtaif

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January 20, 2022

High Performance Parallel I/O and In-Situ Analysis in the WRF Model with ADIOS2

As the computing power of large-scale HPC clusters approaches the Exascale, the gap between compute capabilities and storage systems is ever widening. In particular, the popular High Performance Computing (HPC) application, the Weather Research and Forecasting Model (WRF) is being...

By Michael Laufer, Erick Fredj

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October 21, 2021

A Four-Element 5–6-GHz CMOS Quadrature Balanced Full-Duplex MIMO Transmitter With Wideband Digital Interference Cancellation

This work presents a 5–6 GHz full-duplex (FD) multiple-input and multiple-output (MIMO) transmitter front-end based on a quadrature balanced power amplifier (QBPA) topology and wideband digital interference cancellation. The proposed architecture benefits from low implementation complexity and is compatible with...

By Nimrod Ginzberg, Dror Regev, Rani Keren, Shimi Shilo, Doron Ezri, Emanuel Cohen

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October 8, 2021

Analysis and Design of Quasi-Circulating Quadrature Hybrid for Full-Duplex Wireless

This article presents a new electronic device – the four-port quasi-circulating quadrature hybrid (QCQH), which combines desirable features of electronic circulators and quadrature hybrids. The QCQH comprises three quarter-wavelength transmission lines and a 90° non-reciprocal phase shifter (NRPS) and is...

By Dror Regev, Erez Zolkov, Nimrod Ginzberg, Rani Keren, Shimi Shilo, Doron Ezri, Emanuel Cohen

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August 19, 2021

A 65 nm CMOS Quadrature Balanced Switched-Capacitor Power Amplifier for Full- and Half-Duplex Wireless Operation

This article proposes a multi-mode wireless transmitter for full-duplex (FD) and half-duplex (HD) operation based on a quadrature balanced switched-capacitor power amplifier (QB-SCPA) architecture in 65 nm CMOS. The QB-SCPA provides inherent passive transmit–receive (TX–RX) isolation along with an embedded...

By Nimrod Ginzberg, Dror Regev, Rani Keren, Emanuel Cohen

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June 6, 2021

Universal Virtual Lab: A Fast and Accurate Simulation Method for Nonlinear DWDM Systems

We present a fast, accurate and highly parallel-processed simulation method for BER assessments of nonlinear DWDM systems based on the time-varying NLIN model with estimation errors below 0.1 dBQ and speedup factors reaching over one thousand. © 2021 The Authors.

By David Dahan, Michael Zarubinsky, Yunhua Liang, Ori Golani, Mark Shtaif

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May 27, 2021

Smartphone Location Recognition with Unknown Modes in Deep Feature Space

Smartphone location recognition aims to identify the location of a smartphone on a user in specific actions such as talking or texting. This task is critical for accurate indoor navigation using pedestrian dead reckoning. Usually, for that task, a supervised...

By Nati Daniel, Felix Goldberg, Itzik Klein

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