**Abstract**

Reconfiguration array antenna is usually achieved in terms of pattern, frequency, and polarization by changing the relative amplitudes, phases of the excitation distribution, and material characteristics present in the array, at the cost of simple and complex feeding networks both. In this chapter, basically different types of array antennas are discussed with its design with reconfigurations. Also, for high generation communication system, a widely used graphene material is taken to get reconfiguration in antenna using array form. There are so many other techniques being used and discussed to get reconfiguration. To get reconfiguration at high frequency, i.e., terahertz frequency, graphene is the best material to use in antenna to solve many applications nowadays compared with only few materials, which is useful design. Here, few designs have been introduced to understand the reconfiguration in array antenna for broadband applications. The proposed chapter represents advancement on the development of multipurpose antennas having different applications in communication, broad banding, detection, etc., in recent research systems.

**Keywords:** array antenna, reconfigurable techniques, frequency reconfiguration, pattern reconfiguration, polarization reconfiguration, graphene, liquid crystal
