材料科学
超材料
介电常数
带宽(计算)
电介质
光电子学
谐振器
超材料天线
频带
介质谐振器
天线(收音机)
电子工程
定向天线
计算机科学
电信
缝隙天线
工程类
作者
Xiaoyu Li,Denghao Ma,Xinwei Xu,Hongye Wang,Fei Jin,Jin Cheng,Biao Guo,Cong Liu,Hong Wang
标识
DOI:10.1002/adfm.202514533
摘要
Abstract The increasing demand for electronic devices operating in specific frequency bands (e.g., X‐band dielectric resonator antennas) has driven the development of materials with precisely tunable permittivities. Metamaterials with artificially engineered microstructures are promising for tailoring the effective permittivity to meet application‐specific requirements. By leveraging the high precision of 3D printing, this work achieves precise control over the effective permittivity by accurately adjusting the geometric parameters of metastructures and establishes a permittivity prediction model for composite materials using effective medium theory. The application‐driven design of a graded dielectric metamaterial is demonstrated through an X‐band dielectric resonator antenna with the following significant performance improvements: a broad bandwidth (6.2 GHz) covering the entire X‐band (8–12 GHz), whereas the conventional bandwidth is only 1.7–4.2 GHz, and a gain value of 14.7 dB. This study paves the way for the development of high‐performance antennas, radio frequency components, and frequency‐selective devices with enhanced frequency adaptability and integration.
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