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Programmable Active Mirror: A Scalable Decentralized Router

Fikes, Austin and Khial, Parham P. and Nooshabadi, Samir and Hajimiri, Ali (2021) Programmable Active Mirror: A Scalable Decentralized Router. IEEE Transactions on Microwave Theory and Techniques, 69 (3). pp. 1860-1874. ISSN 0018-9480.

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This work proposes and demonstrates the scalable router array that eliminates the internal centralization of conventional arrays, unlocking scalability, and the potential for a system composed of spatially separated elements that do not share a common timing reference. Architectural variations are presented, and their specific tradeoffs are discussed. The general operation, steering capabilities, signal and noise considerations, and timing control advantages are evaluated through analysis, simulation, and measurements. An element-level CMOS radio frequency integrated circuit (RFIC) is developed and used to demonstrate a four-element 25 GHz prototype router. The RFIC’s programmable true time delay (TTD) control is used to correct path-length-difference-induced intersymbol interference (ISI) and improve a rerouted 270-Mb/s 64-QAM constellation from a completely scrambled state to an EVM of 4% rms (−28 dB). The prototype scalable router’s concurrent dual-beam capabilities are demonstrated by simultaneously steering two full power beams at 24.9 and 25 GHz in two different directions in a free-space electromagnetic setup.

Item Type:Article
Related URLs:
URLURL TypeDescription
Fikes, Austin0000-0003-4889-5782
Khial, Parham P.0000-0002-3242-8541
Hajimiri, Ali0000-0001-6736-8019
Additional Information:© 2020 IEEE. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. Manuscript received August 28, 2020; revised November 13, 2020; accepted November 16, 2020. Date of publication December 22, 2020; date of current version March 4, 2021. The authors would like to thank B. Abiri for his contribution to the integrated circuit digital interface and the members of the Caltech Holistic Integrated Circuits Lab for their help in determining a clear and complete approach for presenting this material.
Subject Keywords:Aperture, integrated circuits, phased array, scalable relay, true time delay (TTD)
Issue or Number:3
Record Number:CaltechAUTHORS:20210113-163505538
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Official Citation:A. Fikes, P. P. Khial, S. Nooshabadi and A. Hajimiri, "Programmable Active Mirror: A Scalable Decentralized Router," in IEEE Transactions on Microwave Theory and Techniques, vol. 69, no. 3, pp. 1860-1874, March 2021, doi: 10.1109/TMTT.2020.3042516
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107469
Deposited By: George Porter
Deposited On:14 Jan 2021 18:40
Last Modified:08 Mar 2021 19:54

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