In wireless communication era, reduction of total size of devices is a challenge faced. Miniaturization results in
placing the antenna elements closely. This in turn results in mutual coupling between the elements of the antenna due to which
it suffers from high signal correlation and low antenna efficiency. This paper manifests a comparative study of numerous
mutual coupling reduction techniques developed to improve the performance of MIMO antenna. A multiband compact planar
MIMO antenna is designed and Neutralizing Line, Electromagnetic Band Gap, Meander Line and Defected Ground Structure
are implemented on the proposed antenna to reduce the mutual coupling and to enhance isolation.
