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 this paper, a long slot antenna of conical radiation beam is presented, which is based on the substrate integrated waveguide (SIW). The antenna consists of a pair of tapered long slots etched out of both the top and bottom broad walls of a substrate integrated waveguide to produce the conical radiation beam. Experiment results of the fabricated antenna show that the realized beam-pointing angle...
This paper presents the development of high-frequency ultrasonic annular arrays. A high-frequency six-ring annular array was successfully fabricated with the DRIE dry-etching. The array has a total aperture of 1.3 mm and six equal area (0.25 mm2 ) rings separated by 16-??m kerfs. The simulations prove its capability of dynamic focusing and its improved lateral resolution. The measured results of the...
A node-by-node joint multi-user iterative decoding strategy, instead of the detector-decoder loop strategy, is proposed based on the factor graph representation of the LDPC-coded IDMA system. To analyse the proposed iterative decoding process, a Gaussian approximation based density evolution algorithm is designed. The degree distributions of LDPC codes are optimised for the IDMA system when the system...
Flat-top spectral response from cascaded subwavelength resonant filters is demonstrated experimentally with much flatter passband and sharper rolloff than for a single filter. The ratio of 10 dB to 3 dB bandwidth is reduced from 3 for a single filter to 1.53.
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.