A new compact microstrip triple band antenna using half mode CRLH transmission line

This paper presents a compact triple band metamaterial antenna for different wireless applications. The designed antenna is based on a new configuration as half mode metamaterial left handed transmission line. The proposed antenna was designed to cover the frequency bands from 2-2.4 GHz, 5.4-6 GHz, and 6.8-8 GHz. The theoretical design principles of half mode left handed transmission line antenna is explained. The antenna design has been validated using the electromagnetic full wave analysis. The antenna has the advantages of a compact size (only 2.5 × 2.5 cm²) which is only is less than 25% at lower frequency band compared to the size of the conventional patch antenna. The results confirm the antenna triple bands operation with return loss better than 15 dB at each operating band and better than 10 dB cross polarization isolation.