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Numerical Study on Frequency Up-conversion in USPR using MATLAB
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 Title & Authors
Numerical Study on Frequency Up-conversion in USPR using MATLAB
Roh, Young-Su;
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 Abstract
In this paper, the O-mode ultrashort-pulse reflectometry (USPR) millimeter-wave signals that propagate into the plasma and cover a frequency bandwidth of 33-158 GHz are examined numerically using MATLAB. Two important processes are involved in the computation: the propagation of the USPR impulse signal through a waveguide and the frequency up-conversion using millimeter-wave mixers. These mixers are limited to intermediate frequency signals that are less than 500 mV; thus, it is necessary to disperse the impulse signal into a chirped waveform using the waveguide. The stationary phase method is utilized to derive a closed-form formula for a chirped waveform under the assumption that the USPR impulse is Gaussian. In the process of frequency up-conversion, the chirped waveform is mixed with the mixer LO signal, and the lower frequency components of the RF signal are removed using high pass filters.
 Keywords
Chirped waveform;Frequency bandwidth;Frequency up-conversion;Method of stationary phase;Ultrashort-pulse reflectometry;
 Language
English
 Cited by
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Reconstruction of the Electron Density Profile in O-mode Ultrashort Pulse Reflectometry using a Two-dimensional Finite Difference Time Domain,;

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Improvement of Power Spectrum in Ultrashort Pulse Reflectometry Signals Using Three Chirp Configuration,;

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1.
Improvement of Power Spectrum in Ultrashort Pulse Reflectometry Signals Using Three Chirp Configuration, Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 2014, 28, 3, 51  crossref(new windwow)
2.
Reconstruction of the Electron Density Profile in O-mode Ultrashort Pulse Reflectometry using a Two-dimensional Finite Difference Time Domain, Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 2013, 27, 7, 52  crossref(new windwow)
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