A dual mode CRLH TL metamaterial antenna

This paper presents a novel configuration for dual mode CRLH metamaterial antenna. The proposed configuration comprises two short and open circuits in CRLH unit cells. The proposed antenna configuration has the advantages of its independent dual band design capabilities the design can be extended to achieve a wide band antenna performance. Moreover, the structure is very compact in size. Different studied cases are introduced in this paper to confirm all these advantages. Only one coplanar waveguide CRLH cell was employed in the study which consists of a series interdigital capacitor and shunt strip inductor. A prototype band WiMAX antenna performance is examined experimentally. The results illustrates that the antenna has a dual band at 3.5 GHz and 5.2 GHz with return loss better than 10 dB. The antenna size is 26 × 23 mm². The antenna CRLH radiating cells length is only 5 mm which is only 15 % and 33% compared to conventional antenna operates at the same frequency.