title: Control of critical coupling in a coiled coaxial cable resonator.
abstract: This paper reports a coiled coaxial cable resonator fabricated by cutting a slot in a spring-like coiled coaxial cable to produce a periodic perturbation. Electromagnetic coupling between two neighboring slots was observed. By manipulating the number of slots, critical coupling of the coiled coaxial cable resonator can be well controlled. An ultrahigh signal-to-noise ratio (over 50 dB) at the resonant frequency band was experimentally achieved from a coiled coaxial cable resonator with 38 turns. A theoretic model is developed to understand the device physics. The proposed device can be potentially used as a high quality and flexibly designed band-stop filter or a sensor in structural health monitoring.
authors.affiliation: Department of Electrical and Computer Engineering, Center for Optical Materials Science and Engineering Technologies, Clemson University, South Carolina 29634, USA.
authors.forename: Jie
authors.initials: J
authors.lastname: Huang
authors.affiliation: Department of Electrical and Computer Engineering, Missouri University of Science and Technology Rolla, Missouri 65409, USA.
authors.forename: Tao
authors.initials: T
authors.lastname: Wei
authors.affiliation: Department of Electrical and Computer Engineering, Missouri University of Science and Technology Rolla, Missouri 65409, USA.
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.affiliation: Department of Electrical and Computer Engineering, Missouri University of Science and Technology Rolla, Missouri 65409, USA.
authors.forename: Jun
authors.initials: J
authors.lastname: Fan
authors.affiliation: Department of Electrical and Computer Engineering, Center for Optical Materials Science and Engineering Technologies, Clemson University, South Carolina 29634, USA.
authors.forename: Hai
authors.initials: H
authors.lastname: Xiao