Gain enhancement for MIMO antenna using metamaterial structure

Abstract

In this paper, a multiple input multiple output antenna which operates at 5.8 GHz for wireless local area network applications is proposed. The proposed antenna is composed of two sets of four elements antenna array (2 × 2) on the top and a novel metamaterial structure on the ground plane. Here, the ground plane, which includes a lattice of 2 × 5 unit cells of metamaterial structure, is utilized in order to improve parameters of the antenna. Thanks to the proposed metamaterial structure, not only gain and bandwidth of antenna are enhanced, but also mutual coupling is reduced. The final design, with an overall size of 137 × 77 × 3.048 mm3, resulted in a |S11| <−10 dB bandwidth of 1.78 GHz and a peak gain of 9.2 dBi. In addition, the isolation is higher than 18 dB although the close separation from edge to edge of the two antennas is only 2 mm and radiation efficiency of 73% at the operating frequency band. All is simulated based on CST Studio software and the simulated S-parameter results of the antenna are in good agreement with measurement results.

Dual‐band CPW fed MIMO antenna with polarization diversity and improved gain

“…In addition to this, via is used in References which increases design complexity. The antennas in References are larger in size with LP. Thus, it is clear that a dual band dual polarization (CP and LP), isolation, polarization diversity (RHCP and LHCP), and gain enhancement all have been presented at one place in the proposed work.…”

“…Gain enhancement of a triple band linearly polarized (LP) antenna is discussed in Reference . Increase in gain of linear polarized MIMO antenna is presented in References , however, gain enhancement of circularly polarized antenna for MIMO applications has remained a challenge to the researchers.…”

A Microstrip MIMO Antenna with Enhanced Isolation for WiMAX Applications

“…Using the formula in [10], we can calculate the size of each radiation element. Furthermore, we select equal dividers whose principle can be found in [11]. We use the CST Studio software to optimize and obtain that the dimension of each element is 23.6 × 20.8 mm and the distance between elements is approximately 0.4 where is the wavelength in free space.…”

Isolation enhancement of 5G multiple‐input multiple‐output microstrip patch antenna using metamaterials and the theory of characteristic modes

“…There have been many strategies 4‐11 to tackle the problem of nearby antennas coupling. A neutralization line has been incorporated in a MIMO antenna system to let down the coupling with the improved isolation; nevertheless, it is difficult to control the outcome of this procedure 4 .…”

“…Besides, it is conjointly common to use a defected ground structure (DGS), 7 , 8 as a band‐stop filter to attain decoupling. In addition to the normal ways, the strategy of exploitation of the special properties of metamaterials (MTMs) to achieve the required impact is additionally mentioned in, 9 , 10 , 11 The main downside within the metamaterials methodology for enhancing isolation is determinant its form, number of elements, and position in conjunction with the significant quantity of optimization time concerned, and hitherto, no systematic style methodology is obtainable.…”