An optimized Doherty power amplifier using an unequal quadrature input splitter

Sung Chan Jung; Yao Xi; Hyunchul Park; Sung Wook Kwon; Juho Van; Kyung Hoon Lim; Min Su Kim; Hanjin Cho; Jong Hyuk Jeong; Youngoo Yang

doi:10.1002/mop.23420

An optimized Doherty power amplifier using an unequal quadrature input splitter

Sung Chan Jung
, Yao Xi
, Hyunchul Park
, Sung Wook Kwon
, Juho Van
, Kyung Hoon Lim
, Min Su Kim
, Hanjin Cho
, Jong Hyuk Jeong
, Youngoo Yang

Department of Electronic and Electrical Engineering

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

7 Scopus citations

Abstract

In this article, we present an optimized Doherty power amplifier using an unequal quadrature input splitter and bias control for the peaking amplifier. The linearity and efficiency performances of the Doherty power amplifier were experimentally optimized by means of unequal quadrature input power splitters, which drive unbalanced input power between the carrier and peaking amplifiers. The bias points of the peaking amplifier were also adjusted for each input splitter. A high power-added efficiency of 33.68% and an output power of 33.95 dBm were achieved for a down-link wide-band code division multiple access signal excitation at a given adjacent channel leakage-power ratio of -30 dBc. This was a significant improvement by 2.75% and 8.22% points from the conventional Doherty and class-AB amplifiers, respectively.

Original language	English
Pages (from-to)	1536-1539
Number of pages	4
Journal	Microwave and Optical Technology Letters
Volume	50
Issue number	6
DOIs	https://doi.org/10.1002/mop.23420
State	Published - Jun 2008

Keywords

Doherty amplifier
Load impedance modulation
Quadrature splitter

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10.1002/mop.23420

Cite this

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title = "An optimized Doherty power amplifier using an unequal quadrature input splitter",

abstract = "In this article, we present an optimized Doherty power amplifier using an unequal quadrature input splitter and bias control for the peaking amplifier. The linearity and efficiency performances of the Doherty power amplifier were experimentally optimized by means of unequal quadrature input power splitters, which drive unbalanced input power between the carrier and peaking amplifiers. The bias points of the peaking amplifier were also adjusted for each input splitter. A high power-added efficiency of 33.68\% and an output power of 33.95 dBm were achieved for a down-link wide-band code division multiple access signal excitation at a given adjacent channel leakage-power ratio of -30 dBc. This was a significant improvement by 2.75\% and 8.22\% points from the conventional Doherty and class-AB amplifiers, respectively.",

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T1 - An optimized Doherty power amplifier using an unequal quadrature input splitter

AU - Jung, Sung Chan

AU - Xi, Yao

AU - Park, Hyunchul

AU - Kwon, Sung Wook

AU - Van, Juho

AU - Lim, Kyung Hoon

AU - Kim, Min Su

AU - Cho, Hanjin

AU - Jeong, Jong Hyuk

AU - Yang, Youngoo

PY - 2008/6

Y1 - 2008/6

N2 - In this article, we present an optimized Doherty power amplifier using an unequal quadrature input splitter and bias control for the peaking amplifier. The linearity and efficiency performances of the Doherty power amplifier were experimentally optimized by means of unequal quadrature input power splitters, which drive unbalanced input power between the carrier and peaking amplifiers. The bias points of the peaking amplifier were also adjusted for each input splitter. A high power-added efficiency of 33.68% and an output power of 33.95 dBm were achieved for a down-link wide-band code division multiple access signal excitation at a given adjacent channel leakage-power ratio of -30 dBc. This was a significant improvement by 2.75% and 8.22% points from the conventional Doherty and class-AB amplifiers, respectively.

AB - In this article, we present an optimized Doherty power amplifier using an unequal quadrature input splitter and bias control for the peaking amplifier. The linearity and efficiency performances of the Doherty power amplifier were experimentally optimized by means of unequal quadrature input power splitters, which drive unbalanced input power between the carrier and peaking amplifiers. The bias points of the peaking amplifier were also adjusted for each input splitter. A high power-added efficiency of 33.68% and an output power of 33.95 dBm were achieved for a down-link wide-band code division multiple access signal excitation at a given adjacent channel leakage-power ratio of -30 dBc. This was a significant improvement by 2.75% and 8.22% points from the conventional Doherty and class-AB amplifiers, respectively.

KW - Doherty amplifier

KW - Load impedance modulation

KW - Quadrature splitter

UR - https://www.scopus.com/pages/publications/43049149446

U2 - 10.1002/mop.23420

DO - 10.1002/mop.23420

M3 - Article

AN - SCOPUS:43049149446

SN - 0895-2477

VL - 50

SP - 1536

EP - 1539

JO - Microwave and Optical Technology Letters

JF - Microwave and Optical Technology Letters

IS - 6

ER -

An optimized Doherty power amplifier using an unequal quadrature input splitter

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Keywords

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