An analog linearizer using second harmonic signal mixing operation

被引：0

作者：

Jeon, Ki Kyung ^{[1
]}

Kim, Ell-Kou ^{[1
]}

Kim, Young ^{[1
]}

机构：

[1] Kumoh Natl Inst Technol, Sch Elect Engn, Gyungbuk, South Korea

来源：

2005 ASIA-PACIFIC MICROWAVE CONFERENCE PROCEEDINGS, VOLS 1-5 | 2005年

关键词：

mixer; predistorter; power amplifier; second harmonic signal;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, a predistortion linearizing method using second harmonic signals down-conversion mixing operation is proposed. The harmonic generator, which is used small signal transistor with abnormal bias condition, generates the second harmonic signals. To generate IMD3 signals, we are used the extracted signal as mixing signal source. These signals are combined fundamental signals with out of phase. As a result, this predistoter is suppressed the intermodulation distortion signals of power amplifier effectively. The suggested predistorter has been manufactured to operate In Cellular base-station transmitting band (869-894MHz). The test results show that IMD3 Is improved about 25dB for CW two-tone signals. For an IS-95 CDMA signal amplification, it's Improved the adjacent channel power ratio(ACPR) more than 7.5dB and 6.4dB at +/- 750KRz and +/- 1.98MHz offset frequency.

引用

页码：1171 / 1174

页数：4

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