Autor: Anlage, S. M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Aspects of the Scattering and Impedance Properties of Chaotic Microwave Cavities
Autorzy:: Hemmady, S.
Zheng, X.
Antonsen, T.
Ott, E.
Anlage, S. M.
Powiązania:: https://bibliotekanauki.pl/articles/2044605.pdf
Data publikacji:: 2006-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 05.45.Mt
03.65.Nk
11.55.-m
03.50.De
84.40.-x
84.40.Az
Opis:: We consider the statistics of the impedance Z of a chaotic microwave cavity coupled to a single port. We remove the non-universal effects of the coupling from the experimental Z data using the radiation impedance obtained directly from the experiments. We thus obtain the normalized impedance whose probability density function is predicted to be universal in that it depends only on the loss (quality factor) of the cavity. We find that impedance fluctuations decrease with increasing loss. The results apply to scattering measurements on any wave chaotic system.
Źródło:: Acta Physica Polonica A; 2006, 109, 1; 65-71
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: New Results in Chaotic Time-Reversed Electromagnetics: High Frequency One-Recording-Channel Time-Reversal Mirror
Autorzy:: Anlage, S. M.
Rodgers, J.
Hemmady, S.
Hart, J.
Antonsen, T. M.
Ott, E.
Powiązania:: https://bibliotekanauki.pl/articles/2047818.pdf
Data publikacji:: 2007-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 03.50.De
05.45.Mt
41.20.Jb
42.65.Hw
Opis:: We experimentally demonstrate a new electromagnetic one-recording-channel time-reversal mirror that can operate at high frequencies and high bandwidths. The experiments are carried out in a 1 m$\text{}^{3}$ ray-chaotic enclosure using two simple antennas. The input is a 7.0 GHz signal that is amplitude modulated with a 60 ns long pulse. The time-reversal focused signal has a peak-signal-to-noise ratio of about 9 dB, and is very sensitive to small perturbations to the ray-chaotic enclosure. The results are consistent with expectations for single-recording-channel time-reversal mirrors, and establish a new platform for study of fundamental issues in time-domain wave chaos, as well as novel applications.
Źródło:: Acta Physica Polonica A; 2007, 112, 4; 569-574
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Chaotic Time-Reversed Acoustics: Sensitivity οf the Loschmidt Echo to Perturbations
Autorzy:: Taddese, B.
Johnson, M.
Hart, J.
Antonsen, T.
Ott, E.
Anlage, S.
Powiązania:: https://bibliotekanauki.pl/articles/1585110.pdf
Data publikacji:: 2009-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 03.55.Kk
05.45.Mt
43.58.+z
43.60.+d
Opis:: We experimentally demonstrate a new acoustic sensor based on the concept of quantum mechanical scattering fidelity and the Loschmidt echo applied to classical acoustic waves in air. The sensor employs a one-recording-channel time-reversal mirror that exploits spatial reciprocity to sensitively measure the classical analog of the scattering fidelity of an enclosed region. The experiments are carried out in a stairwell using a simple speaker and microphone. The input is a 7.0 kHz signal that is amplitude modulated with a 1 ms long pulse. We examine the sensitivity of the time-reversed reconstructed pulse to phase noise, long term drift, and to typical perturbations caused by the rotation of an object in the scattering environment.
Źródło:: Acta Physica Polonica A; 2009, 116, 5; 729-732
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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