CMOS Integrated Magnetless Circulators Based on Spatiotemporal Modulation Angular-Momentum Biasing release_nmrdxmk4prg4noskj7wvj3eea4

by Ahmed Kord, Mykhailo Tymchenko, Dimitrios Sounas, Harish Krishnaswamy,, Andrea Alù

Released as a article .

2019  

Abstract

In this paper, we introduce the first integrated circuit (IC) implementation of spatiotemporally modulated angular-momentum (STM-AM) biased magnetless circulators. The design is based on a modified current-mode topology which is less sensitive to parasitics and relies on switched capacitors rather than varactors to achieve the desired modulation, thus reducing the circuit complexity and easing its chip-scale realization. We analyze the presented circuit and study its performance in the presence of inevitable non-idealities using an in-house so-called composite Floquet scattering matrix (CFSM) numerical method. We also validate the analysis with simulated and measured results using a standard 180 nm CMOS technology, showing good performance. Compared to previous discrete implementations of STM-AM circulators, the presented CMOS chip reduces the form factor by at least an order of magnitude and occupies a total area of only 36 mm2.
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Type  article
Stage   submitted
Date   2019-02-19
Version   v1
Language   en ?
arXiv  1902.06935v1
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