Mutual coupling in an antenna array is caused due to the signal leakage as the conduction current through the metallic part underneath the radiating elements and the surface wave surrounding the substrate along with the radiation leakage. The influence of mutual coupling weakens the array performances like scattering parameter, antenna gain, radiation pattern, antenna efficiency etc. The mutual coupling caused by the radiation leakage can be minimized by using circuit manipulation or by introducing the microstrip resonator of optimized design between the antenna elements. A new technique has been adopted in this paper to reduce the impact of mutual coupling by introducing a simple microstrip resonator of dollar symbol between the microstrip antenna elements. Suitably designed and proper placement of resonator structure can improve the effect of mutual coupling by suppressing surface wave propagation of a particular frequency range. It has been observed that the proposed structure produces sufficient suppression of electromagnetic coupling having a reduction of more than 43 dB at the designed frequency of 5.75 GHz. An array of four radiating elements has been designed for improving the gain of the antenna.

天线阵列中的相互耦合是由于信号泄漏引起的，该信号泄漏是通过辐射元件下面的金属部分的传导电流以及围绕衬底的表面波以及辐射泄漏造成的。互耦的影响会削弱阵列性能，例如散射参数，天线增益，辐射方向图，天线效率等。通过使用电路操纵或在天线之间引入优化设计的微带谐振器，可以最小化由辐射泄漏引起的互耦。元素。通过在微带天线元件之间引入一个简单的美元符号微带谐振器，本文采用了一种新技术来减小相互耦合的影响。通过适当地设计和适当放置谐振器结构，可以通过抑制特定频率范围内的表面波传播来改善相互耦合的效果。已经观察到，所提出的结构产生了对电磁耦合的充分抑制，在5.75 GHz的设计频率下，电磁耦合的降低超过43 dB。已经设计了四个辐射元件的阵列以提高天线的增益。