Analysis and design of microstrip antenna array using interdigital capacitor with CRLH-TL ground plane for multiband applications

Control and manipulation of electromagnetic waves is at the heart of many industries from wireless communication, Internet and optical data storage to imaging and displays. Progress in these technologies places challenging demands on material properties and therefore structured electromagnetic materials. Metamaterials are a special class of structured materials. Patterning on the sub-wavelength scale allows precise engineering of their electromagnetic properties over a range going far beyond natural media. In this paper, two elements microstrip antenna array using interdigital capacitor with composite right / left handed transmission line (CRLH-TL) ground plane has been introduced. The analysis and design are done by a commercial software. The good agreement between the theoretical expectation and the simulation results is observed. Finally, the proposed optimum multiband microstrip antenna array design structure has been fabricated and the measured S-parameters of the proposed structure can be analyzed with network analyzer to demonstrate the excellent performance and meet the requirement for multiband applications.