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Shaping the Power Spectrum of Ultra-Wideband Radio-Frequency Signals

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3 Author(s)
McKinney, J.D. ; Naval Res. Lab., Washington, DC ; Lin, I.S. ; Weiner, A.M.

We demonstrate the ability to tailor the power spectrum of ultra-wideband (UWB) RF waveforms via a photonics-based electromagnetic pulse shaper. We describe and experimentally demonstrate a waveform design methodology that allows us to achieve desirable power spectrum properties, such as broad bandwidth and minimal spectral ripple. As one example, we generate a 115% fractional-bandwidth impulsive waveform which spans the 3-10-GHz band, with ripple below plusmn1.5 dB over a 5-GHz band. Furthermore, by treating the RF spectral phase as a design parameter, we demonstrate how to achieve increased power spectral density. We illustrate the spectral design capabilities of our technique by presenting a variety of tailored UWB waveforms (including impulses, chirped signals, and arbitrary waveforms) with bandwidths that range from ~4 to 8 GHz

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:54 ,  Issue: 12 )

Date of Publication:

Dec. 2006

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