title: Ultra-wideband tunable resonator based on varactor-loaded complementary split-ring resonators on a substrate-integrated waveguide for microwave sensor applications.
abstract: This paper presents the modeling, design, fabrication, and measurement of an ultra-wideband tunable twoport resonator in which the substrate-integrated waveguide, complementary split-ring resonators (CSRRs), and varactors are embedded on the same planar platform. The tuning of the passband frequency is generated by a simple single dc voltage of 0 to 36 V, which is applied to each varactor on the CSRRs. Different capacitance values and resonant frequencies are produced while a nearly constant absolute bandwidth is maintained. The resonant frequency is varied between 0.83 and 1.58 GHz and has a wide tuning ratio of 90%.
authors.forename: Somarith
authors.initials: S
authors.lastname: Sam
authors.forename: Sungjoon
authors.initials: S
authors.lastname: Lim
mesh_terms: D003198:Computer Simulation; D055615:Electrical Equipment and Supplies; D004867:Equipment Design; D008872:Microwaves; D014463:Ultrasonography / Q000295:instrumentation*