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Research Article
A 1.2- to 3-GHz tunable feedforward amplifier using broadband distributed phase shifters
Article first published online: 22 NOV 2011
DOI: 10.1002/mop.26445
Copyright © 2011 Wiley Periodicals, Inc.
Additional Information
How to Cite
Wu, S., Xiao, J., Cha, H., Jo, S. and Kim, H. (2012), A 1.2- to 3-GHz tunable feedforward amplifier using broadband distributed phase shifters. Microw. Opt. Technol. Lett., 54: 250–254. doi: 10.1002/mop.26445
Publication History
- Issue published online: 22 NOV 2011
- Article first published online: 22 NOV 2011
- Manuscript Received: 12 APR 2011
Funded by
- Kyungpook National University internal fund
- Abstract
- Article
- References
- Cited By
Keywords:
- broadband;
- feedforward;
- phase shifter;
- transmission line;
- distributed;
- nonlinear transmission line
Abstract
In this article, we demonstrate a broadband tunable feedforward amplifier design.For any frequency between 1.2 and 3 GHz, the third order intermodulation distortion (IMD) is reduced up to 18dB and the circuit maintains the spurious free dynamic range over 60 dBc at the output. This technique utilizes the combination of a broadband distributed-element phase shifter (DPS) and a radio frequency feedforward approach to achieve a wideband linearization. The key element is a low-loss, broadband and 360° changeable DPS. Because of its broadband tunable IMD cancellation capability, the proposed design will be very useful in multimode and multi channel wireless communication systems where the high power output with minimized distortion is needed. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:250–254, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26445