A Six-polarized Antenna With Dipoles and Loops

This work proposes a six-polarized antenna by using 3 pairs of orthogonal dipoles and loops collocated at the same physical centers, and the size of the proposed antenna is 30 × 30 × 30 cm
³
, i.e., (0.52λ
0
)
³
. The coupling between the dipoles and the loops can be reduced by rotating their orientations in the 3D space. The simulated results show that the proposed antenna operates at 5.2 GHz with a bandwidth of 300 MHz, and all the values of the port coupling are lower than -13.6 dB. The gain are higher than 2.9 dBi, and 2 dBi for the dipoles and the loops, respectively. The radiation efficiencies are higher than 91%. The envelope correlation coefficients (ECCs) are lower than 0.08, and the degree of freedom (DOF) is 5.75, which can provide a good diversity performance and a high channel capacity in the wireless communication systems.