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

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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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