Design and Performance Analysis of a Multiband Microstrip Patch Array Antenna at Ku and K Band

Utilization of microstrip patch array antenna in space borne radar and satellite application is widespread nowadays. An array antenna operating at Ku band (12 GHz to 18 GHz) and K band (18 GHz to 27 GHz) for radar and cube-sat applications is presented in this paper. The designed antenna consists of 64 dual feed radiating elements arranged in a 2×2 sub-array configuration. A block of 16 elements constitute of four 2×2 sub-array are excited with single feed line connected with central feed. All 2×2, 4×4 and 8×8 arrays are analyzed, where 8×8 array illustrates higher bandwidth, high gain and significant return loss with multiple output. To implement the antenna for radar and/or cube-sat application, high gain, high bandwidth and multiple output are the prerequisites, which are achieved here. The performance parameters of the antenna are represented as the tabular form in the appendix section for better understanding.