Supply-Scaling for Efficiency Enhancement in Distributed Power Amplifiers

Distributed amplifiers (DAs) feature large bandwidth but relatively low gain and power efficiency. This paper presents a supply-scaling technique to improve the efficiency of a mm-wave DA while maintaining a broadband 50\Omega match. An analysis of interstage load modulation and the effects of shunt...

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Published in:IEEE journal of solid-state circuits 2016-09, Vol.51 (9), p.1994-2005
Main Authors: Fang, Kelvin, Levy, Cooper S., Buckwalter, James F.
Format: Article
Language:English
Subjects:
Bandwidth
Bandwidths
Distributed amplifiers
Impedance
millimeter-wave amplifiers
Modulation
Power generation
Power transmission lines
SiGe BiCMOS
Silicon
Transistors
wideband power amplifiers
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cited_by cdi_FETCH-LOGICAL-c402t-a58fa2d110d731571748de54df42521d9505f9c5ce7dcc954fb638d2318a57483
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container_end_page 2005
container_issue 9
container_start_page 1994
container_title IEEE journal of solid-state circuits
container_volume 51
creator Fang, Kelvin
Levy, Cooper S.
Buckwalter, James F.
description Distributed amplifiers (DAs) feature large bandwidth but relatively low gain and power efficiency. This paper presents a supply-scaling technique to improve the efficiency of a mm-wave DA while maintaining a broadband 50\Omega match. An analysis of interstage load modulation and the effects of shunt dc-feed inductors on distributed operation is provided. A single-ended, eight-stage DA is designed in a 90 nm SiGe BiCMOS process. The fabricated amplifier has a gain of 12 dB over a 3 dB bandwidth from 14-105 GHz. The measured peak output power is 17 dBm with a peak power-added efficiency (PAE) of 12.6% at 50 GHz and 3 dB power bandwidth greater than 70 GHz. The DA occupies an area of 2.65 mm × 0.57 mm, and total dc power consumed from four scaling voltage supplies is 297 mW.
doi_str_mv 10.1109/JSSC.2016.2584639
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source IEEE Electronic Library (IEL) Journals
subjects Bandwidth
Bandwidths
Distributed amplifiers
Impedance
millimeter-wave amplifiers
Modulation
Power generation
Power transmission lines
SiGe BiCMOS
Silicon
Transistors
wideband power amplifiers
title Supply-Scaling for Efficiency Enhancement in Distributed Power Amplifiers
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