Efficiency enhancement technique for feed-forward amplifier using negative group delay circuit

Kazuhisa Yamauchi; Hifumi Noto; Akira Inoue; Moriyasu Miyazaki

doi:10.1109/IWAT.2008.4511308

Efficiency enhancement technique for feed-forward amplifier using negative group delay circuit

Kazuhisa Yamauchi^*, Hifumi Noto, Akira Inoue, Moriyasu Miyazaki

^*この研究の対応する著者

研究成果: Paper › 査読

抄録

We present a design and an implementation of a multistage negative group delay circuit. It is small in size and has a compact circuit. Each stage of the multistage circuit is composed of three lumped resonators with resisters. To obtain the good reflection, the resonators are arranged in the π circuit. We discuss the principle of the negative group delay circuit and apply the circuit to the feed-forward amplifier. The delay line of the distortion cancellation loop is shortened 40% by connecting the circuit to the driver stage of the error amplifier. The efficiency of the feed-forward amplifier has been improved from 9% to 12%.

本文言語	English
ページ	139-142
ページ数	4
DOI	https://doi.org/10.1109/IWAT.2008.4511308
出版ステータス	Published - 2008
外部発表	はい
イベント	2008 IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, IWAT 2008 - Chiba, Japan 継続期間: 2008 3月 4 → 2008 3月 6

Conference

Conference	2008 IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, IWAT 2008
国/地域	Japan
City	Chiba
Period	08/3/4 → 08/3/6

ASJC Scopus subject areas

人工知能
電子工学および電気工学
電子材料、光学材料、および磁性材料
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10.1109/IWAT.2008.4511308

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author = "Kazuhisa Yamauchi and Hifumi Noto and Akira Inoue and Moriyasu Miyazaki",

year = "2008",

doi = "10.1109/IWAT.2008.4511308",

language = "English",

pages = "139--142",

note = "2008 IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, IWAT 2008 ; Conference date: 04-03-2008 Through 06-03-2008",

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AU - Yamauchi, Kazuhisa

AU - Noto, Hifumi

AU - Inoue, Akira

AU - Miyazaki, Moriyasu

PY - 2008

Y1 - 2008

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AB - We present a design and an implementation of a multistage negative group delay circuit. It is small in size and has a compact circuit. Each stage of the multistage circuit is composed of three lumped resonators with resisters. To obtain the good reflection, the resonators are arranged in the π circuit. We discuss the principle of the negative group delay circuit and apply the circuit to the feed-forward amplifier. The delay line of the distortion cancellation loop is shortened 40% by connecting the circuit to the driver stage of the error amplifier. The efficiency of the feed-forward amplifier has been improved from 9% to 12%.

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T2 - 2008 IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, IWAT 2008

Y2 - 4 March 2008 through 6 March 2008

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Efficiency enhancement technique for feed-forward amplifier using negative group delay circuit

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