Coaxial Resonator

A coaxial resonator is a cylindrical electromagnetic structure that confines radio-frequency or microwave energy between concentric inner and outer conductors, producing highly selective resonances. It operates when the signal wavelength and resonator length satisfy a standing-wave condition, allowing fields in the coaxial space to reinforce at specific frequencies; conductor dimensions and boundary conditions determine the resonant frequency, quality factor, and impedance. Coaxial resonators support frequency-selective filters, oscillators, impedance measurements, and cavity-based sensors in engineering systems. Their shielded geometry limits radiation and electromagnetic interference, while compact dimensions and predictable behavior make them useful for telecommunications, test equipment, and high-frequency circuit design.

Coaxial Resonator - Related Videos

Education

JoVE Core - Physics

Energy Stored In A Coaxial Cable

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2023

A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly. In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic field inside...

Research

JoVE Journal - Engineering
Free Sample

Preparation and Use of Photocatalytically Active Segmented Ag|ZnO and Coaxial TiO2-Ag Nanowires Made by Templated Electrodeposition

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Cited by 1 •

2014

Procedures are outlined to prepare segmented and coaxial nanowires via templated electrodeposition in nanopores. As examples, segmented nanowires consisting of Ag and ZnO segments, and coaxial nanowires consisting of a TiO2 shell and a Ag core were made. The nanowires were used in photocatalytic hydrogen formation experiments.

Resonance

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2020

The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds. If nitrite ions do indeed contain a single and a double bond, the two bond lengths are expected to be different. A double bond between two atoms is shorter (and stronger) than a single bond between the same two atoms. However, experiments show that both N–O bonds in NO2− have the same strength and length, and are identical in all other...

Inducing a Spinal Cord Contusion in a Mouse Model Using a Spinal Cord Injury Coaxial Platform

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2025

Source: Elzat, E. Y. Y., et al., Establishing a Mouse Contusion Spinal Cord Injury Model Based on a Minimally Invasive Technique. J. Vis. Exp. (2022).This video demonstrates the method for inducing a contusion injury at the T9 level spinal cord in a mouse model, using a spinal cord injury coaxial platform. A weight is dropped on the T9 level spinal cord that creates a contusion that immediately causes tissue discoloration and swelling.

Fabrication and Characterization of Superconducting Resonators

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Cited by 3 •

2016

Superconducting microwave resonators are of interest for detection of light, quantum computing applications and materials characterization. This work presents a detailed procedure for fabrication and characterization of superconducting microwave resonator scattering parameters.

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