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.
The demand for a software-defined radio (SDR) is increasing because it can support variety of frequency bands and modulation techniques. However, a condition of an antenna can become a bottleneck of the communication system using SDR due to less flexibility of the antenna. For example, when the SDR changes the signal frequency dynamically or the communication system faces a disturbance such as human...
A methodology for improving efficiency of wireless power transfer (WPT) systems, derived from the concept of conjugate image impedances, is presented. For accuracy reasons, enhancement of the system efficiency through adjustment of its geometry parameters is based on full-wave electromagnetic (EM) simulation models. Fast WPT system design is realized by means of surrogate-based optimization exploiting...
This paper presents theoretical analysis and experimental results for the optimum impedance matching condition of a rectenna in an EM energy harvester operating at low ambient power densities. The nonlinear behavior around the threshold voltage of the rectifier is analyzed. Closed-form equations for impedance matching and for predicting the dc output power are derived. A medium wave rectenna was designed...
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.