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 paper focuses on a variety of issues related to energy harvesting techniques and their possible application in self-powered wireless sensor network (WSN) environments. Three different sources have been considered for the harvesting, including electromagnetic, solar and thermal energy. First, the results of a measurement campaign carried out in different urban environments are presented and discussed;...
In this paper, a retro-directive RFID topology is proposed, in order to improve the range of passive RFID tags. The use of a paper substrate permits to obtain low-cost, flexible and easy-to-fabricate circuits. First, the single element of the retro-directive array is proposed, consisting of a dipole with an inductive loop that guarantees the desired impedance matching between the antenna and the RFID...
A novel active antenna array, based on substrate integrated waveguide technology, is designed and demonstrated. The array is based on cavity-backed antenna oscillators, and the coupling is obtained by properly connecting the cavities. Accurate control of both amplitude and phase of the coupling is achieved. The most significant result of this novel array is the possibility to obtain beam-scanning...
This work presents the design and implementation of a 927 MHz radio frequency beacon in coplanar waveguide technology, which scavenges through solar energy the power necessary for operation. Starting from a folded-slot antenna topology, a reflection-type oscillator is designed by combining full-wave and nonlinear analyses. Properly placed solar cells and a regulator are used to bias the device by...
This paper presents an investigation of the fabrication tolerance in waveguide filters operating at 30 GHz and implemented in Substrate Integrated Waveguide (SIW) technology. Millimeter-wave filters are getting more and more attention in the literature, as the interest towards applications in this frequency band grows. Moreover, SIW technology appears as a very promising candidate for the realization...
This work presents 2×2 and 4×4 array topologies for millimeter-wave operation, realized in High Temperature Co-fired Ceramics (HTCC) and High Thermal Coefficient Expansion (HITCE) technologies. The arrays, operating around 60 GHz, have as their main application target the ultra-high data-rate wireless communication in LOS (line-of-sight) condition, operating in the worldwide-available 60 GHz band...
This paper presents the design of a reflectarray based on coupled oscillators, whose elements are active cavity-backed antenna oscillators. The cavity backed topology, implemented in Substrate Integrated Waveguide (SIW) technology, allows for a compact, single substrate implementation, and provides a means for the suppression of the undesired surface-wave modes and for heat dissipation. The coupling...
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.