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, we propose a new method to design a beam-scanning sparse array with minimum spacing constraint. The proposed method consists of two optimization steps. In the first step, an iterative reweighted L1-norm optimization is used to obtain an initial sparse array without minimum spacing constraint. In the second step, we carry on a series of element combination and perturbations to meet the...
In this paper, the propagation characteristics of UWB (Ultra-wideband) signal in the indoor NLOS (Non-Line-of-Sight) environment are discussed based on the time-domain ray tracing method. Propagation characteristics are analyzed by considering of multipath propagation mechanisms including direct ray, reflection and transmission, such as the time-domain normalized electric field intensity, instantaneous...
We propose an antenna gain pattern estimation method for broad band antennas. We have already reported a method for estimating the far field gain using an amplitude center modified Friis transmission formula. This equation can estimate the far field gain using near field S21(ω) measurement for two difference antenna distance. In this paper, we propose a far field gain pattern estimation method using...
The 60GHz band millimeter-wave propagation characteristics are simulated and analyzed using the method of ray tracing method in the indoor complex environment. The propagation characteristics in the line-of-sight(LOS) and non-line-of-sight(NLOS) environment are discussed. The effect of the polarization and the roughness on the root-mean-square(RMS) delay spread are analyzed. Results of the study can...
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.