Sensing of stochastic waves with logarithmic periodic linear antenna arrays
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Time-domain electromagnetic interference (EMI) measurement systems sample the broad-band EMI signal with GHz sampling rates and compute the EMI spectrum by digital signal processing. This yields not only a reduction of the measurement time by three to four orders of magnitude but also excellent broadband pulse transfer characteristics. In order to fully exploit the broadband performance of modern time-domain EMI measurement systems for measurements of radiated EMI, broadband antennas with excellent pulse transfer characteristics are required. In this work we investigate the broadband direction characteristics of logarithmic periodic linear antennas for electromagnetic interference sensing. We compute the directivity of linear logarithmic antenna arrays for stochastic plane waves by delay time synthesis for stochastic plane waves with Gaussian and rectangular spectra. For stationary signals the sensor beams can be formed on the basis of the autocorrelation functions of all pairs of sensor element signals. For sensing incident stationary stochastic signals, the correlation functions of the antenna elements only need to be measured pairwise. © 2012 IEEE.
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Russer, J; Jirauschek, C; Szakmany, G; Schmidt, M; Orlov, A; Bernstein, G; Porod, W; Lugli, P; Russer, P (IEEE Microwave Theory and Techniques Society, 2015)Infrared (IR) detectors for the long-wave infrared range (LWIR) based on nanostructured thermocouples exhibit response times in the order of picoseconds and will open new areas of applications in THz broadband communication ...
Szakmany GP; Orlov AO; Bernstein GH; Porod W; Bareiss M; Lugli P; Russer JA; Jirauschek C; Russer P; Ivrlac MT; others (VDE-Verlag, 2014)Infrared detectors for the long-wave infrared range (lwir) are of special interest due to their ability to detect blackbody radiation of objects at room temperature. Such detectors are attractive candidates for various ...
Russer J; Scarpa G; Lugli P; Russer P (IEEE, 2011)A method for a stochastic treatment of noisy electromagnetic fields is presented. A complete description of stochastic electromagnetic fields is given by the autocorrelation spectrum of the different field variables and ...