The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
DESHIMA (Deep Spectroscopic High-redshift Mapper) is an instrument aiming at efficiently making spectroscopic redshift measurements of sub-mm wave galaxies (SMGs), thereby providing about the formation and the evolution of stars and galaxies. The aim of this work is to provide a preliminary study into the design of a wideband leaky lens antenna coupled quasi-optical system within a 1:3 bandwidth....
A novel method allowing for reduction of coupling between vertically placed radiating elements in antenna arrays has been proposed. It has been shown, that appropriate offsetting the antenna array elements from the array symmetry axis allows to improve isolation between adjacent elements, which results in improvement of the obtained radiation pattern. The theoretical investigation has been performed...
Antenna related questions for wideband amplitude-only (AO) direction finding (DF) systems at lower millimeter-wave frequencies are addressed. Phased-array and non-array squinted antenna topologies are researched and important conclusions are drawn. Theory based on ideal beams is used to assess effects of misbalances and experiments with fabricated prototypes operating over 18–45GHz range are used...
This paper presents a wideband measurement and characterization of a tropical forested channel. Complex channel impulse response measurements were carried out at 240 MHz for static transmit and receive antennas. Measured power delay profiles indicate significant multipath components following the dominant propagating wave. Relevant parameters such as RMS delay spread, Rician K factor et al. have been...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.