A coplanar waveguide (CPW)-fed dual-band antenna operating at linear and circular polarization is presented in this letter. A novel composite right/left-handed (CRLH) unit cell is designed as a radiation element that can provide zeroth-mode resonance and positive-mode resonance at the lower and upper frequency. A TM mode orthogonal to 1st-Order is excited by a square complementary split-ring resonator (S-CSRR) in order to form a circular polarization. The equivalent circuit model is applied to analyze and design the CRLH unit cell. The antenna has a linearly polarized slot-like radiation characteristic at the lower frequency and a circularly polarized patch-like radiation characteristic at the upper frequency. Also, the total electrical size of the fabricated dual-band antenna employing a single unit cell was at the lower frequency. Simulation and experimental results are used to verify the theoretical prediction.
Index Terms-Composite right/left-handed (CRLH), coplanar waveguide (CPW), dual-band antenna, linearly and circularly polarized.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.