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.
A parallel feeding circuit is usually adopted to increase impedance bandwidth, in return for achieving wide bandwidth, radiation efficiency diminishes at special frequency usually. The reason of efficiency null exist was presented by analyzing the current mode in feeding structure. This study has important implications to designs of efficiency enhanced wideband antenna using magnetic coupling with...
This paper proposes a new wireless information and power transfer (WIPT) system based on frequency splitting phenomenon. Three resonant frequencies appear in a four coils WPT system within certain distance under specific circuit parameters. Noticeably, the middle resonant frequency remains constant regardless of coupling coefficient change. This advantage provides a stable carrier frequency for communication...
Wireless embedded sensors are ideally suitable for monitoring concrete structures because of their small size and ability to measure various quantities inside concrete. Wireless power transmission for such sensors embedded in plain/reinforced concrete slab is studied here. The return loss and transmission loss of dipole and patch antennas are studied at typical RFID frequencies. Also, the antennas'...
A novel ultra-wideband bandpass filter based on a cross-shaped triple-mode microstrip resonator is proposed in this paper. The cross-shaped resonator is realized by loading two open-stubs at the center of a microstrip resonator. Circuit model for the resonator is studied and analysised. Resonance of Even and odd modes of the resonator can be fully controlled by changing the length of the resonator...
In this paper, a microstrip bandpass filter is proposed for wireless communication. This filter is realized by using fractal shaped resonator which is etched on the bottom metal layer of the microstrip. The resonant characteristic of the fractal shaped defected grounded structure resonator is studied. Couplings between the defected grounded structure resonators and input/output port is also extracted...
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.