A Compact MIMO DRA Antenna

Multiple input, multiple output (MIMO) is an antenna technology for wireless communications in which multiple antennas are used at both the source (transmitter) and the destination (receiver). The antennas at each end of the communications circuit are combined to minimize the errors and to optimize the data speed. MIMO-based antennas are of interest in relation to communication such as digital TV, wireless LAN and mobile communications. MIMO arrangements are of particular interest for other communication devices. When applying a dielectric resonator antenna (DRA) type in a MIMO system and using it for the transmission of two or more signals using the same frequency, high coupling often occurs between the different antenna signals. The occurrence of the coupling may seriously degrade the performance of such an antenna. Thus, it would be beneficial to provide a DRA that can be used to simultaneously transmit and receive more than one signal at the same frequency. Also, where the incidence of coupling between these antennas, signals is reduced. DAR offers several advantages such as wide bandwidth, small size, ease of fabrication and high radiation efficiency. This paper presents characteristics of DRA antenna for 2.6 GHz (UMTS band 7).