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.
In ultra low power RF energy harvesting circuits, it is required that incident power is handled efficiently. One such requirement is to avoid re-radiation of higher order harmonics generated in the single or two diode rectenna. In this paper, a ground slot is proposed to eliminate the higher order harmonic resonance, while ensuring a fixed fundamental resonance at 2.1 GHz, and circular polarization...
This paper presents a novel wireless power transmission system consisting of tightly coupled microstrip line resonators. Half wavelength strip line resonators are arrayed on the substrate and are electromagnetically coupled by the parasitic resonator place above the bottom resonators. This overlay resonators are used as microwave transmission system. The power transmission from this one-dimensional...
A sensor power supply is proposed, comprising an antenna, rectifier and accumulator. For the rectifier, we modified the Greinacher's rectifying circuit to achieve tunable input response for channel selection in the Digital TV (DTV) band and higher RF-to-DC conversion efficiency desired for DTV energy-harvesting given at least ™5 dBm power incidence. Channel selection is implemented by four input matching...
This paper describes the design and development of a cellular near-field power harvesting circuit. Its potential to independently power sensor systems without batteries is demonstrated and discussed. As universal criteria to decide which batteries in sensor systems can be directly replaced by the proposed power harvesting circuit, discharge characteristics of Lithium and Alkaline batteries were investigated...
Wireless sensor networks often suffer from battery power drain below threshold values. If the battery is not replaced, the sensor node expires. To remedy the situation, we propose a system design that allows for instance an nRF401 radio to wake up and transmit data above its threshold battery level of 2.7 V. The proposed cellular energy-harvesting circuit (rectenna) basically consists of a receiving...
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.