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

^*Corresponding author for this work

Research output: Contribution to conference › Paper › peer-review

Abstract

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%.

Original language	English
Pages	139-142
Number of pages	4
DOIs	https://doi.org/10.1109/IWAT.2008.4511308
Publication status	Published - 2008
Externally published	Yes
Event	2008 IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, IWAT 2008 - Chiba, Japan Duration: 2008 Mar 4 → 2008 Mar 6

Conference

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

ASJC Scopus subject areas

Artificial Intelligence
Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials
Communication

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10.1109/IWAT.2008.4511308

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Efficiency enhancement technique for feed-forward amplifier using negative group delay circuit. / Yamauchi, Kazuhisa; Noto, Hifumi; Inoue, Akira et al.

2008. 139-142 Paper presented at 2008 IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, IWAT 2008, Chiba, Japan.

Research output: Contribution to conference › Paper › peer-review

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year = "2008",

doi = "10.1109/IWAT.2008.4511308",

language = "English",

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

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ASJC Scopus subject areas

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