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, the dependency of the gain on the distance from an antenna array with elements in a numerical compact range and the deviation in gain by offsetting the reference antenna (REF) are evaluated by simulation and experiment, respectively.
Large channel capacity is achieved by Multi-Input Multi-Output (MIMO) technology with multi-antenna at the transmitter and receiver side, and many studies to maximize the channel capacity have been performed [1], [2]. In indoor wireless communications for small area as typified by femtocell and wireless LAN, the channel capacity has been reported to be enhanced by directional antennas and multi-polarization...
This paper first presents experimental results of indoor 2x2 MIMO channel characteristics when a vertically and horizontally polarized dual-polarized antenna (VH antenna) is used in a base station. Two terminal-antenna cases are considered in this paper. One is the VH antenna case, and the other has two vertically polarized antennas (VV antennas). Then MIMO performance is investigated based on the...
In multiple-input multiple-output (MIMO) systems, orthogonal polarization is utilized to achieve small mutual coupling and low spatial correlation. We present the 4 times 4 MIMO channel measurements in the line-of-sight (LOS) environment in a small room. We reveal the difference of the channel capacity dependent on receiving positions by comparison of the vertical polarized antenna configuration (V)...
A dipole antenna in a borehole may be placed away from the center of the borehole, and this eccentricity produces additional complicated electromagnetic fields, which may influence borehole radar signals. In this paper, we analyze an eccentric dipole antenna in a borehole for borehole radars. Our approach is an extended version of the pseudoanalytical formulation that was previously applied for analyzing...
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.