Predistortion Linearizer for Wideband AM/PM Cancelation With Left-Handed Delay Line
| Autor: | Kaixue Ma, Hongxi Yu, Kiat Seng Yeo, Jun Li, Thangarasu Bharatha Kumar, Xin Xu, Dawei Zhang |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
business.industry 020208 electrical & electronic engineering Electrical engineering Phase (waves) 020206 networking & telecommunications 02 engineering and technology Integrated circuit Condensed Matter Physics Predistortion Power (physics) law.invention Linearizer Transmission line law Distortion 0202 electrical engineering electronic engineering information engineering Electronic engineering Electrical and Electronic Engineering Wideband business |
| Zdroj: | IEEE Microwave and Wireless Components Letters. 27:794-796 |
| ISSN: | 1558-1764 1531-1309 |
| DOI: | 10.1109/lmwc.2017.2734760 |
| Popis: | In this letter, a modified predistortion linearizer model is proposed to enable wideband synthesis of phase predistortion function. Additional time delay based on an artificial left-handed transmission line is introduced in the model to characterize the frequency-dependent phase conversion function, which can be utilized for wideband cancelation of the AM/PM distortion in microwave power amplifiers. Based on the proposed model, a microwave monolithic integrated circuit predistorter is designed to generate both positive gain and phase conversion according to the input power, and to realize increasing phase conversion as frequency increases. Large signal measurement of the design is performed at 20, 20.75, and 21.5 GHz. Result shows that +4.8-dB gain conversion is achieved, while phase conversion increases from +12.9° to +30.8° as frequency increases from 20 to 21.5 GHz. |
| Databáze: | OpenAIRE |
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