Design of Compact Diplexer Using CRLH-TL Resonators

Abstract

This paper first discusses a design for a compact resonator using a Composite Right/Left-Handed Transmission Line (CRLH-TL). Moreover, an All-resonator type diplexer using proposed resonators is designed and fabricated. The measured frequency characteristics for the fabricated diplexer are mostly in agreement with an electromagnetic (EM) simulated one. The size of the measured diplexer is 6.3 mm × 4.35 mm (0.068λ_g × 0.047λ_g), which is much smaller than other compact diplexers.