To reduce mutual coupling in microstrip patch antenna arrays elements using electromagnetic band gap structures for X-band

The demand for today is to have a Compact and reduced size devices, hence requires reduced sized antenna. For reduced sized, array elements can be placed closer to each other. However, the problem of mutual coupling, depending on interelement separation and their relative orientation, becomes a challenge [3][4]. To overcome this, we proposed an EBG structured antenna. The most used characteristics of Electromagnetic Band Gap (EBG) structure are the surface wave suppression effect within its band gap. Hence, they can reduce the mutual coupling due to surface wave propagation [2][9][10]. EBG provides better compactness, easy integrated feature and 2-D band gap properties. Also, by using EBG structure, antenna array characteristics like total size and radiation efficiency can also be improvised [1].