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.
The Precision Array for Probing the Epoch of Reionization (PAPER) is a focused experiment aimed at detecting the spatial power spectrum of neutral hydrogen emission during the Epoch of Reionization (EoR). PAPER is an interferometer operating from 100 – 200 MHz at the site of the future Square Kilometre Array (SKA) site in South Africa. The PAPER antennas measure linear polarization and the correlator...
This paper presents a single feed small size multi-frequency band antenna. The antenna is composed of several folded conducting strips and an L-shaped ground plane. Simulated and measured results show that in addition to a lower frequency band for 700 MHz band wireless applications, the antenna can operate at higher frequency bands of GSM/800/900/1800/1900 and UMTS 2100 and the antenna feature high...
We are developing a Transition-edge Hot-electron Microbolometer (THM) with the capacity to make sensitive and broadband astrophysical observations over frequencies ranging from 30-300 GHz (10-1 mm). This micron-sized bolometer consists of a superconducting bilayer Transition-Edge Sensor (TES) and a thin-film absorber. The THM employs the decoupling between electrons and phonons at low temperatures...
We analyze the performance of a multi-input multiple-output (MIMO) system using an electromagnetic-based model. The analysis include the effects of the number of antennas and the signal-to-noise ratio. The analyzed scenarios are for a macrocell environment, where the channel matrix is obtained using the field solutions from our electromagnetic-based model. The instant capacity in bits/sec/Hz is computed...
A numerical analysis approach for link-level simulations of a multi-antenna system (MIMO) is presented. The analysis is done in an urban microcell environment. We adopt a hybrid electromagnetic-based approach to simulate this environment. The link-level error rate performance simulation and the instant capacity are computed, respectively. Comparisons are made with the measurement-based spatial channel...
Multiple-input multiple-output (MIMO) correlation matrices for high, medium, and low correlation antenna configurations are proposed. Typical microcell scenarios are adopted for simulations using an electromagnetic-based approach for full-wave field solutions. The MIMO correlation coefficients are obtained by the post-processing of these field solutions. The proposed correlation matrices are used...
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.