An X-band metamaterial wave-absorbing sensor

Abstract

The invention relates to an X-band metamaterial wave-absorbing sensor, which is divided into three layers from bottom to top. The first layer is a metal bottom plate and a bottom substrate, the second layer is a microfluidic layer, and the third layer is a top substrate and a resonator. , the three-layer structure is bonded into one to form a wave-absorbing resonance unit. The resonator is formed on the top substrate and has an inner and outer double annular structure. The microfluidic channel layer is etched with a double-ring groove in the upper part to form microfluidic channels. The microfluidic channels are distributed on the side facing the resonator. Strong electric field resonance region. After the measured liquid is injected into the sensor, the dielectric constant of the microfluidic area can be changed, causing a shift in the absorption frequency point. The degree of shift can be used as a characteristic parameter of different measured liquids. When the relative dielectric constant of the measured liquid changes from 1 to 4.6, the sensor can achieve an average offset of 339MHz / unit dielectric constant, and the absorption rate remains above 95%.

Description

Technical field [0001] The invention relates to a metamaterial wave-absorbing sensor and belongs to the field of microwave sensing and detection. Background technique [0002] Metamaterial is a kind of artificial composite material with strange electromagnetic properties. It can exhibit many properties that are difficult to exist in nature, such as negative magnetic permeability, negative refractive index, etc. Metamaterials are generally planar structures that are easy to manufacture and integrate. Since artificial design has clear goals, continuous optimization of structures and exploration of new structures, metamaterials can be made into ultra-thin finished products for easy practical application. [0003] In 2010, Na Liu et al. successfully designed the first metamaterial wave-absorbing sensor. Simulations showed that the sensor could sense and detect different glucose solutions. Because of its advantages as a metamaterial, it quickly attracted the attention of many sc...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of large size and low sensitivity of the metamaterial wave-absorbing sensor, the present invention aims to provide an X-band single absorption peak high-sensitivity wave-absorbing sensor, which can be excited around the resonator by optimizing and adjusting the structure design and its parameters. Strong electrical resonance mode, achieving more than 99% absorbing performance

Images