A Novel Distortion Compensation Technique Using an Active Inductor (Special Issue on Low Distortion Technology for Microwave Devices and Circuits)
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概要
- 論文の詳細を見る
This paper presents a novel distortion compensation technique using an active inductor. First, we describe the input-reflection-coefficient characteristics of a GaAs MESFET active inductor when input power increases, We show that the inductor exhibits positive amplitude deviation and negative/positive phase deviation as the input power increases when the biases of the FETS are set appropriately. The chip size of the fabricated active inductor is less than 0.52 mm^2. Then, we show that third-order intermodulation is improved when the active inductor is used as a predistortion linearizer. Third-order intermodulation was improved over the output range from 14 dBm to 25 dBm, and at the output of 15 dBm, third-order intermodulation was improved approximately by 9 dB when the predistortion linearizer was introduced. The active inductor can thus function as a miniaturized predistortion linearizer by using it in the input matching circuit of a power amplifier. This technique can be applied in the miniaturization of wireless communication devices.
- 社団法人電子情報通信学会の論文
- 1999-05-25
著者
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MURAGUCHI Masahiro
NTT Network Innovation Labs.
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Muraguchi Masahiro
Ntt Network Laboratories
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HAYASHI Hitoshi
NTT Network Innovation Laboratories
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Hayashi Hitoshi
Ntt Network Laboratories
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