Application Study Of MNZ Material In Honeycomb Absorbing Structure

Electromagnetic stealth technology plays an important role in modern military technology.As early as the early last century,with the advent of radar,German scientists put forward the concept of radar stealth.After a century of development,no matter from the theory or technology,whether from the concept or practical application,stealth technology has made great progress.The focus of this paper is on the absorbing materials themselves,absorbing materials are the key technology to achieve electromagnetic stealth.The research of absorbing materials in China has been carried out earlier,and there is mature theory and technology support in related fields.The conventional absorbing materials are mainly coated or structured,such as electromagnetic wave absorbers or patches with complex magnetic parameters,and structural absorbing materials are mainly angular cone structure or honeycomb structure.The traditional absorbing materials have a wide frequency band and excellent mechanical and thermal properties.They are the main absorbing materials in practice.however,the traditional absorbing materials have poor absorbing properties in P and L bands,which can not meet the requirements of low frequency absorbing properties of absorbing materials.The development of broadband absorbing materials and the ability to absorb waves in P and L bands is one of the important research topics.At present,many advances have been made in the research of artificial electromagnetic metamaterials.In low frequency band,artificial electromagnetic metamaterials have advantages that traditional absorbing materials do not have,and such metamaterials have strong designability,and their absorbing mechanism is not the same as that of honeycomb absorbing materials.based on the traditional honeycomb absorbing materials,this paper aims to improve the low-frequency absorbing performance and increase the overall absorbing bandwidth by introducing MNZ metamaterials and basically maintaining the highfrequency absorbing performance.Aramid paper honeycomb with a height of 30 mm is used as honeycomb absorbing material skeleton and impregnated with carbon system absorbent.The paper designs the composite honeycomb absorbing material,keeps the shape of the return shaped cell basically unchanged,by changing its unit size and the number of turns around the coil,the size range is controlled at the inner wall of the honeycomb hexagonal hole with 2.75 mm edge length,and the unit is attached to the inner wall,that is,there are six units in each honeycomb hole,° angle of 120 is formed between each unit.The reflection coefficients of the composite honeycomb absorbing materials are obtained by simulation and the factors affecting the absorbing properties are investigated.The simulation results show that the composite honeycomb absorbing materials can generate the absorbing peaks at 0?2 GHz compared with the original honeycomb loaded back into the zigzag metamaterial unit.This paper verifies the theoretical idea of the combination design of traditional absorbing honeycomb and metamaterial,expands the structural design method,and basically realizes the expected research goal.