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A Compact Self-similar Power Combining Topology

Sengupta, Kaushik and Hajimiri, Ali (2010) A Compact Self-similar Power Combining Topology. In: 2010 IEEE MTT-S International Microwave Symposium Digest (MTT). IEEE MTT-S International Microwave Symposium . IEEE , pp. 244-247. ISBN 978-1-4244-7732-6.

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A compact, modular 16-way combiner is presented which is based on a self-similar combiner topology. The combiner achieves a simulated passive efficiency of 38% at 77 GHz in a standard 90nm process with 1.49 µm thick AI top metal. A 77 GHz power amplifier is built based on the combiner, combining the output power of 16 stages to achieve a P_(sat) of 11.4dBm, small signal gain of 9.4dB, and a 3dB bandwidth of more than 11 GHz on a 0.7V supply, with the optimal MAG for the technology being approximately 5dB at 77 GHz. The power amplifier is unconditionally stable with the K factor exceeding 3.8 between 50-90 GHz. The entire architecture is based on a modular power splitting and combining network that makes the design flexible and scalable. To the best of the authors' knowledge, this is the highest P_(sat) reported at 77 GHz in CMOS with a sub 1V quiescent V_(ds).

Item Type:Book Section
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URLURL TypeDescription DOIArticle
Hajimiri, Ali0000-0001-6736-8019
Additional Information:© 2010 IEEE. Issue Date: 23-28 May 2010. Date of Current Version: 23 July 2010.
Subject Keywords:CMOS; Millimeter wave; power amplifier; power combining; self-similar; 77 GHz
Series Name:IEEE MTT-S International Microwave Symposium
Record Number:CaltechAUTHORS:20110413-085620030
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Official Citation:Sengupta, K.; Hajimiri, A.; , "A compact self-similar power combining topology," Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International , vol., no., pp.1, 23-28 May 2010 doi: 10.1109/MWSYM.2010.5516963 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23305
Deposited By: Tony Diaz
Deposited On:26 May 2011 18:59
Last Modified:09 Mar 2020 13:18

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