Broadband choke structure using composite right/left-handed coaxial line

Abstract

The composite right/left-handed (CRLH) coaxial line (CL) is applied to the broadband choke structure. Because the choke structure uses an electromagnetic bandgap (EBG), broadband operation is realized. To obtain the wide bandwidth of the EBG, the CRLH CL is redesigned and applied to the choke structure. The proposed choke structure is attached to the coaxially fed monopole antenna, whose characteristics are simulated. The simulated results show that the proposed choke structure operates in broadband.