采用超材料启发结构的低矮型 ESPAR

IF 3.5 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Amir Jafargholi;Mahmood Safaei;Romain Fleury;Rahim Tafazolli
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引用次数: 0

摘要

本文探讨了传统电子可控寄生阵列辐射器(ESPAR)的三维特性。此外,主辐射器与寄生元件之间所需的距离通常会影响天线的电气尺寸和频率带宽。为了克服这些问题,传统 ESPAR 中的圆柱形寄生元件被模仿人工磁导体(AMC)的超材料启发结构所取代。AMC 由电容加载回路 (CLL) 实现。PIN 二极管在对印刷环形天线进行径向加载的同时,对 CLL 的行为进行电气控制。二极管的接通/断开会改变主波叶的方向,从而形成一个紧凑、单层、扁平和经济高效的结构。通过用变容二极管取代 PIN 二极管,设计并实现了双频和频率可重新配置的 ESPAR,这是传统 ESPAR 结构无法实现的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Low-Profile ESPAR Using Metamaterial-Inspired Structure
This paper addresses the 3D nature of traditional Electronically Steerable Parasitic Array Radiators (ESPARs). Additionally, the required distance between the main radiator and the parasitic elements usually affects the antenna’s electrical size and the frequency bandwidth. To overcome these issues, the cylindrical parasitic elements in conventional ESPARs are replaced with Metamaterial-inspired structures that mimic artificial magnetic conductors (AMC). The AMC is realized by a capacitively loaded loop (CLL). PIN diodes electrically control the CLL’s behavior while radially loading a printed loop antenna. Switching ON/OFF the diodes changes the direction of the main lobe, resulting in a compact, single-layer, low-profile, and cost-effective structure. By replacing the PIN diodes with varactors, a dual-band and frequency-reconfigurable ESPAR are designed and implemented, which is not possible in traditional ESPAR structures.
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来源期刊
CiteScore
6.50
自引率
12.50%
发文量
90
审稿时长
8 weeks
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