A load network for doherty amplifiers using an optimized impedance transformer

Sung Chan Jung; Kyoung Hoon Lim; Hyun Chul Park; Renato Negra; Min Su Kim; Fadhel M. Ghannouchi; Youngoo Yang

doi:10.1002/mop.24657

A load network for doherty amplifiers using an optimized impedance transformer

Sung Chan Jung
, Kyoung Hoon Lim
, Hyun Chul Park
, Renato Negra
, Min Su Kim
, Fadhel M. Ghannouchi
, Youngoo Yang

Department of Electronic and Electrical Engineering

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We propose a load network, consisting of an optimized impedance transformer, for a Doherty amplifier. This load network allows the carrier and peaking amplifiers to have different load impedance. This results in better IM3 cancellation. Using a four-carrier down-link WCDMA signal, we achieved 0.95 dB higher output power level and 2.21% higher power-added efficiency compared to a conventional Doherty amplifier at an ACLR level of -30 dBc.

Original language	English
Pages (from-to)	2502-2504
Number of pages	3
Journal	Microwave and Optical Technology Letters
Volume	51
Issue number	10
DOIs	https://doi.org/10.1002/mop.24657
State	Published - Oct 2009

Keywords

Doherty amplifier
IM3 cancellation
Impedance transformer
Load network
Offset line

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10.1002/mop.24657

Cite this

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title = "A load network for doherty amplifiers using an optimized impedance transformer",

abstract = "We propose a load network, consisting of an optimized impedance transformer, for a Doherty amplifier. This load network allows the carrier and peaking amplifiers to have different load impedance. This results in better IM3 cancellation. Using a four-carrier down-link WCDMA signal, we achieved 0.95 dB higher output power level and 2.21\% higher power-added efficiency compared to a conventional Doherty amplifier at an ACLR level of -30 dBc.",

keywords = "Doherty amplifier, IM3 cancellation, Impedance transformer, Load network, Offset line",

author = "Jung, \{Sung Chan\} and Lim, \{Kyoung Hoon\} and Park, \{Hyun Chul\} and Renato Negra and Kim, \{Min Su\} and Ghannouchi, \{Fadhel M.\} and Youngoo Yang",

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AU - Jung, Sung Chan

AU - Lim, Kyoung Hoon

AU - Park, Hyun Chul

AU - Negra, Renato

AU - Kim, Min Su

AU - Ghannouchi, Fadhel M.

AU - Yang, Youngoo

PY - 2009/10

Y1 - 2009/10

N2 - We propose a load network, consisting of an optimized impedance transformer, for a Doherty amplifier. This load network allows the carrier and peaking amplifiers to have different load impedance. This results in better IM3 cancellation. Using a four-carrier down-link WCDMA signal, we achieved 0.95 dB higher output power level and 2.21% higher power-added efficiency compared to a conventional Doherty amplifier at an ACLR level of -30 dBc.

AB - We propose a load network, consisting of an optimized impedance transformer, for a Doherty amplifier. This load network allows the carrier and peaking amplifiers to have different load impedance. This results in better IM3 cancellation. Using a four-carrier down-link WCDMA signal, we achieved 0.95 dB higher output power level and 2.21% higher power-added efficiency compared to a conventional Doherty amplifier at an ACLR level of -30 dBc.

KW - Doherty amplifier

KW - IM3 cancellation

KW - Impedance transformer

KW - Load network

KW - Offset line

UR - https://www.scopus.com/pages/publications/68349133929

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DO - 10.1002/mop.24657

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JO - Microwave and Optical Technology Letters

JF - Microwave and Optical Technology Letters

IS - 10

ER -

A load network for doherty amplifiers using an optimized impedance transformer

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Keywords

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