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 recent years, ultra wideband (UWB) technology has been drawing attention as a promising technology in order to materialize ubiquitous network. The third-generation (3G) and the fourth-generation (4G) smartphones which employ the UWB technology have been hot. This study reports on a multiband antenna, which covers 800 MHz for 4G, 2.0 GHz for 3G and 3.1–10.6 GHz for UWB, built into such a smart phone...
Ultra wideband (UWB) technology draws attention as a promising technology in order to materialize ubiquitous network. However, it is difficult to obtain the ultra-wideband antenna that performs excellent over a broad frequency band from 3.1 GHz to 10.6 GHz in UWB radio communication. From a view point of cost, production, and miniaturization of devices, ultra-wideband antenna with a feeder line should...
In this paper, a half-sized unbalanced dipole antenna with fan-shaped and trapezoidal elements on a printed circuit board is proposed. The VSWR and radiation patterns of the proposed antenna were investigated. As a result, VSWR characteristics less than 2.0 and a relative bandwidth of 110 % over the frequency band of 3.1 GHz to 10.8 GHz were obtained from measurements. Radiation patterns similar to...
In recent years, ultra-wideband (UWB) technology has drawn considerable attention as a promising option for the development of ubiquitous networks. In comparison with a conventional narrowband antenna system, the development of an electronic device with a built-in broadband antenna is more difficult because antenna performance must be ensured over the entire UWB frequency band. Previously, we proposed...
In recent years, ultra-wideband (UWB) technology has received considerable attention as a promising technology for realizing ubiquitous networks. In comparison with conventional narrowband antennas, it is more difficult to construct a broadband antenna in electronic equipment because it is necessary to ensure antenna performance over the entire UWB frequency band. In this study, we investigated an...
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.