A New Symmetric Multimodal MIMO Antenna with Reduction of Modal Correlation Coefficient Using TCM

摘要

Today, multimode antennas for MIMO (multiple-input multiple-output) systems have been used extensively to develop capacity or to improve the quality of WIFI. Due to the orthogonality of characteristic modes, the theory of characteristic modes used to achieve minimum interference between channels is common in this type of antennas. In this paper, a four-port antenna with symmetric structure is presented on a circular patch to be able to produce four orthogonal patterns with extremely low correlation coefficients (less than 0.001) and high gain in the frequency range of 4.4-5.2 GHz and SWR 1.22, which is highly efficient in creating independent and simultaneous communication paths in MIMO systems. To create this orthogonality and decrease the correlation between channels, the characteristic modes method is used. Circular polarization can be obtained by changing feeding structure in this antenna.