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Proceedings Paper

Automated cancellation of harmonics using feed-forward filter reflection for radar transmitter linearization
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Paper Abstract

Microwave power amplifiers often operate in the nonlinear region to maximize efficiency. However, such operation inevitably produces significant harmonics at the output, thereby degrading the performance of the microwave systems. An automated method for canceling harmonics generated by a power amplifier is presented in this paper. Automated tuning is demonstrated over 400 MHz of bandwidth with a minimum cancellation of 110 dB. The intended application for the harmonic cancellation is to create a linear radar transmitter for the remote detection of non-linear targets. The signal emitted from the non-linear targets is often very weak. High transmitter linearization is required to prevent the harmonics generated by the radar itself from masking this weak signal.

Paper Details

Date Published: 29 May 2014
PDF: 10 pages
Proc. SPIE 9077, Radar Sensor Technology XVIII, 907703 (29 May 2014); doi: 10.1117/12.2051431
Show Author Affiliations
Kyle A. Gallagher, The Pennsylvania State Univ. (United States)
Gregory J. Mazzaro, The Citadel (United States)
Ram M. Narayanan, The Pennsylvania State Univ. (United States)
Kelly D. Sherbondy, U.S. Army Research Lab. (United States)
Anthony F. Martone, U.S. Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 9077:
Radar Sensor Technology XVIII
Kenneth I. Ranney; Armin Doerry, Editor(s)

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