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.
This work proposes a novel version of folded reflectarray antennas that allows beam-steering by adjusting the reflection properties of the polarizing grid on top of the antenna. The necessary degree of freedom is introduced by combining the polarizing grid with narrow patches acting as reflection phase shifters. Hence, this approach is interesting for reconfigurable concepts based on RF MEMS or Liquid...
In this paper, a method for design and optimization of folded reflectarray antennas is proposed based on Particle Swarm Optimization (PSO). In addition to such a powerful optimization algorithm, two further requirements have to be fulfilled. The first one is a good and fast algorithm for the exact prognosis of the farfield radiation diagram, resulting from a specific element configuration on the reflector...
In this paper, single-layer coupled FSS reflection type-structures for reflectarrays are investigated resulting in an increased phase range and smaller slope of the phase angle as a function of structure size. Their improved performance is also demonstrated with three test reflectarray antennas using the novel structures.
In this paper the hybrid integration of an FCC-compliant fifth-order Gaussian derivative impulse generator IC together with a compact ultra-wideband Vivaldi antenna is presented. The setup results in a compact FCC-compliant impulse UWB transmitter. Measurements of the impulse shape in time and spectral domain are shown. With this transmitter a movement detection and the precise measurement of the...
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.