Erkki Salonen

TL;DR: In this paper, the overall spectra of the compact active sources are shown to be well represented by continuous-curvature functions such as parabolas, and the spectra are consistent with models involving continuous particle injection (with synchrotron losses) or first-order Fermi acceleration (with escape and synchoretron losses), but not with models using relativistic Maxwellian electron distributions.

TL;DR: In this article, a new method for cloud attenuation calculation on an earth-satellite link is presented, which uses temperature and humidity profiles as input parameters, and has been applied to radiosonde measurements and to the gridded data of the numerical analyses of ECMWF.

TL;DR: Study of possibilities to construct a flexible, lightweight and mechanically robust textile antenna for dual-band satellite use: Iridium and GPS and the developed antenna solution allows integration into clothing.

TL;DR: In this article, the authors compared the prediction models for tropospheric scintillation on Earth-satellite paths from Karasawa, Yamada, and Allnutt (1988) and the ITU-R with measurement results from satellite links in Europe, the United States, and Japan at frequencies from 7 to 30 GHz and elevation angles of 3 to 33/spl deg.

TL;DR: In this paper, a tuning circuit, comprising an RF switch and discrete passive components, has been completely integrated into the antenna element, which is thus free of dc wires, and the proposed tuning method has been demonstrated with a dual-band PIFA capable of operating in four frequency bands.