1.7 GHz/2.1 GHz dual-band feed-forward amplifier

2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI:10.1109/RWS.2006.1615145

Y. Suzuki, S. Narahashi

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引用次数: 1

Abstract

This paper proposes a new feed-forward amplifier configuration that simultaneously compensates for the intermodulation distortion components in each band, when signals of different frequency bands are input. The signal cancellation loop and distortion cancellation loop in the proposed feed-forward configuration have a filter and vector regulator for each band. The filter only selects the desired frequency band component from the input signals. Employing the filters means that the whole bandwidth of the input signals is converted to an operable bandwidth for the vector regulators. Therefore, the vector regulator can sufficiently adjust the amplitude and phase of the selected frequency band component. The proposed configuration achieves sufficient intermodulation distortion compensation for each band. A 1.7 GHz/2.1 GHz dual-band, 1-W class feed-forward amplifier is investigated. The third-order intermodulation distortion is less than -70 dBc when the output power is 22 dBm for each band. The saturation output power at 1.7 GHz and 2.1 GHz is 28 dBm and 30 dBm, respectively. These experimental results confirm the validity of the proposed feed-forward amplifier configuration.

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1.7 GHz/2.1 GHz双频前馈放大器

本文提出了一种新的前馈放大器结构，当输入不同频带的信号时，可以同时补偿各频带的互调失真分量。在所提出的前馈配置中的信号消除环和失真消除环对每个频带都具有滤波器和矢量调节器。滤波器仅从输入信号中选择所需的频带分量。采用滤波器意味着输入信号的整个带宽被转换为矢量调节器的可操作带宽。因此，矢量调节器可以充分调节所选频段分量的幅度和相位。所提出的配置实现了对每个频带充分的互调失真补偿。研究了一种1.7 GHz/2.1 GHz双频、1w级前馈放大器。当输出功率为22 dBm时，三阶互调失真小于-70 dBc。1.7 GHz和2.1 GHz的饱和输出功率分别为28dbm和30dbm。实验结果证实了所提出的前馈放大器结构的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2006 IEEE Radio and Wireless Symposium

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