Multiband Microstrip Antenna Design Using Harmonics Embedded Array of Composite Right / Left Handed Transmission Line (CRLH-TL)

Recently, the development of composite right / left-handed transmission lines (CRLHTLs) has received considerable attention due to the unique propagation characteristics. Because of this increase in applications, CRLHTLs are being implemented in RF systems with other printed circuitry, such as microstrip antennas. In this paper, harmonics resonance frequency of different embedded CRLH-TL array has been introduced. The analysis and investigation are done by a commercial software. The good agreement between the theoretical expectation and the simulation results is observed. Finally, the application of the selected proposed CRLH-TL array was examined in multiband microstrip antenna design. The proposed microstrip antenna 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 satisfy multiband frequencies using single microstrip patch antenna for different multiband applications.