A bandwidth-extended electrically small dipole antenna based on composite right/left handed (CRLH) transmission line

A bandwidth-extended electrically small dipole antenna based on composite right/left handed (CRLH) transmission line is presented. The proposed structure is realized by a periodic ladder network of four unit cells having air-gaps and wires. Simulated results show that, adjusting the gaps and wires without any additional matching network, a 6.36% impedance bandwidth can be achieved when the length of the antenna is 50.4mm, and well-behaved radiation patterns have been displayed