Waveform Analysis of Microwave Pulses Emitted in Association with Hypervelocity Impacts
Summary :
Though microwave emissions in association with hypervelocity impacts have been confirmed experimentally, the emission characteristics and the emission mechanism have not yet been made clear. For example, whether the emission is noise or a coherent signal is not known. In this paper, two kinds of analyses, output waveform analysis and spectral analysis, are discussed. Regarding output waveform analysis, microwave pulses are simulated on the basis of a microcrack model in consideration of discharge current, and are compared with experimental pulses in terms of the pulse shape and width. Regarding spectral analysis, the intensity and phase of waveforms are calculated in the frequency domain to examine the frequency characteristics. The spectral intensity is nearly flat and the phase has coherency. Accordingly, the microwave emission is not noise but a sequence of independent pulses.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E90-B No.9 pp.2382-2386
- Publication Date
- 2007/09/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1093/ietcom/e90-b.9.2382
- Type of Manuscript
- Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation)
- Category
- Sensing
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Keyword
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Shigeo CHIBA, Eriko SOMA, Tadashi TAKANO, "Waveform Analysis of Microwave Pulses Emitted in Association with Hypervelocity Impacts" in IEICE TRANSACTIONS on Communications,
vol. E90-B, no. 9, pp. 2382-2386, September 2007, doi: 10.1093/ietcom/e90-b.9.2382.
Abstract: Though microwave emissions in association with hypervelocity impacts have been confirmed experimentally, the emission characteristics and the emission mechanism have not yet been made clear. For example, whether the emission is noise or a coherent signal is not known. In this paper, two kinds of analyses, output waveform analysis and spectral analysis, are discussed. Regarding output waveform analysis, microwave pulses are simulated on the basis of a microcrack model in consideration of discharge current, and are compared with experimental pulses in terms of the pulse shape and width. Regarding spectral analysis, the intensity and phase of waveforms are calculated in the frequency domain to examine the frequency characteristics. The spectral intensity is nearly flat and the phase has coherency. Accordingly, the microwave emission is not noise but a sequence of independent pulses.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e90-b.9.2382/_p
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@ARTICLE{e90-b_9_2382,
author={Shigeo CHIBA, Eriko SOMA, Tadashi TAKANO, },
journal={IEICE TRANSACTIONS on Communications},
title={Waveform Analysis of Microwave Pulses Emitted in Association with Hypervelocity Impacts},
year={2007},
volume={E90-B},
number={9},
pages={2382-2386},
abstract={Though microwave emissions in association with hypervelocity impacts have been confirmed experimentally, the emission characteristics and the emission mechanism have not yet been made clear. For example, whether the emission is noise or a coherent signal is not known. In this paper, two kinds of analyses, output waveform analysis and spectral analysis, are discussed. Regarding output waveform analysis, microwave pulses are simulated on the basis of a microcrack model in consideration of discharge current, and are compared with experimental pulses in terms of the pulse shape and width. Regarding spectral analysis, the intensity and phase of waveforms are calculated in the frequency domain to examine the frequency characteristics. The spectral intensity is nearly flat and the phase has coherency. Accordingly, the microwave emission is not noise but a sequence of independent pulses.},
keywords={},
doi={10.1093/ietcom/e90-b.9.2382},
ISSN={1745-1345},
month={September},}
Copy
TY - JOUR
TI - Waveform Analysis of Microwave Pulses Emitted in Association with Hypervelocity Impacts
T2 - IEICE TRANSACTIONS on Communications
SP - 2382
EP - 2386
AU - Shigeo CHIBA
AU - Eriko SOMA
AU - Tadashi TAKANO
PY - 2007
DO - 10.1093/ietcom/e90-b.9.2382
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E90-B
IS - 9
JA - IEICE TRANSACTIONS on Communications
Y1 - September 2007
AB - Though microwave emissions in association with hypervelocity impacts have been confirmed experimentally, the emission characteristics and the emission mechanism have not yet been made clear. For example, whether the emission is noise or a coherent signal is not known. In this paper, two kinds of analyses, output waveform analysis and spectral analysis, are discussed. Regarding output waveform analysis, microwave pulses are simulated on the basis of a microcrack model in consideration of discharge current, and are compared with experimental pulses in terms of the pulse shape and width. Regarding spectral analysis, the intensity and phase of waveforms are calculated in the frequency domain to examine the frequency characteristics. The spectral intensity is nearly flat and the phase has coherency. Accordingly, the microwave emission is not noise but a sequence of independent pulses.
ER -
English
