Advances in Radio Science Radiation Pattern Analysis of Antenna Systems for MIMO and Diversity Configurations
نویسنده
چکیده
Multiple-input multiple-output (MIMO) antenna systems and antenna configurations for wideband multimode diversity rank among the emerging key technologies in next generation wireless communication systems. The analysis of such transmission systems usually neglects the influences of real antenna radiation characteristics as well as the influences of mutual coupling in a multielement antenna arrangement. Nevertheless, to achieve a detailed description of diversity gain and channel capacity by using several transmitand receive antennas in a wireless link, it is essential to take all those effects into account. The expansion of the radiation fields in terms of spherical eigenmodes allows an analytical description of the antenna radiation characteristics and accounts for all the coupling effects in multielement antenna configurations. Therefore the radiation pattern analysis by spherical eigenmode expansion provides an efficient alternative to establish an analytical approach in the calculation of envelope correlation or channel capacity.
منابع مشابه
Conical Conformal Antenna Design using the CPM Method for MIMO Systems
Abstract- In this article, the design of conformal antennas has been discussed using the characteristic modes (CM) method. For this purpose, the vector wave function(VWF) has been utilized to achieve a two-dimensional mapping of the conformal antenna. In designing and analyzing of cone-shaped antennas applicable for multi-input multi-output (MIMO) systems, the most important goal is to achieve ...
متن کاملRecent Advances in Metamaterial Antennas
Some recent advances done by the author and his collaborators in the field of antennas and antenna arrays are presented. These include: multiband systems, an infinite-wavelength antenna array series feeding network, a true time delay system allowing beam squint free scanning, a pencil-beam full-space scanning array, a beam-forming system based on active aperture discretization, a MIMO dynamic r...
متن کاملAn antenna solution for MIMO channels: the switched parasitic antenna
We investigate the switched parasitic antenna (SPA), which is a novel technique for electronically directing the radiation pattern, in a MIMO system. The correlation between the received signal modes are shown to be sufficiently low to yield a diversity gain. The capacity limit using the SPA is investigated for different SPA configurations and it is found that the capacity is comparable with an...
متن کاملSimulation study of Four Element MIMO Antenna System with Pattern and Polarization Diversity
In this paper, two configurations of previous work are extensively studied, namely pattern diversity and hybrid (pattern and polarization) diversity configuration. The first configuration provides the pattern diversity whereas second configuration provides both the pattern as well as the polarization diversity which helps to mitigate the multipath propagation effect. Both the configurations are...
متن کاملDesign of Reconfigurable Parasitic Antenna for Single RF Chain MIMO Systems
Abstract— In recent years parasitic antenna play major role in MIMO systems because of their gain and spectral efficiency. In this paper, single RF chain MIMO transmitter is designed using reconfigurable parasitic antenna. The Spatial Modulation (SM) is a recently proposed scheme in MIMO scenario which activates only one antenna at a time. The SM entirely avoids ICI and IAS, and only requires a...
متن کامل