具有极化带宽可重构性的基于双感测插槽的CP MIMO天线。

Dual-sense slot-based CP MIMO antenna with polarization bandwidth reconfigurability.

作者信息

Hussain Niamat, Aljaloud Khaled, Hussain Rifaqat, Alqahtani Ali H, Khan Zia Ullah, Tahir Farooq A, Abbasi Qammer H

机构信息

Department of Intelligent Mechatronics Engineering, Sejong University, Seoul, Korea.

College of Engineering, Muzahimiyah Branch, King Saud University, P.O. Box 2454, Riyadh, 11451, Saudi Arabia.

出版信息

Sci Rep. 2023 Sep 26;13(1):16132. doi: 10.1038/s41598-023-42569-1.

DOI:10.1038/s41598-023-42569-1

PMID:37752140

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10522704/

Abstract

In this letter, a compact, planar circularly polarized (CP) sub-GHz slot-based multiple-input-multiple-output (MIMO) antenna with dual sense CP along with polarization bandwidth reconfigurability is presented. The pentagonal reactively loaded slot is fed by two folded tapered feedlines to achieve CP. The antenna offers left-hand-circular polarization (RHCP) with the as well as right hand circular polarization (LHCP). The antenna exhibit linearly polarization (LP) by exciting two ports simultaneously. Moreover, the antenna CP resonance can be reconfigured by varying the capacitance of the varactor diode. The antenna has a wide -10 dB operating frequency band from 578-929 MHz. while the axial ratio (AR) bandwidth ranges from 490-810 MHz. Moreover, the two elements MIMO are optimized and placed on compact dimensions 100 × 100 × 0.76 mm to realize pattern diversity. The antenna's key characteristics are compact size, wide-band sub-GHz operation, dual sense CP, polarization bandwidth reconfigurability and good MIMO performance. Thus, it is a suitable candidate to be utilized in CubeSats applications in sub-GHz bands.

摘要

在这封信中，提出了一种紧凑的基于平面圆极化（CP）的亚GHz缝隙式多输入多输出（MIMO）天线，它具有双极化CP以及极化带宽可重构性。五边形电抗加载缝隙由两条折叠渐变馈线馈电以实现圆极化。该天线可提供左旋圆极化（RHCP）以及右旋圆极化（LHCP）。通过同时激励两个端口，天线呈现线极化（LP）。此外，通过改变变容二极管的电容可重构天线的CP谐振。该天线具有从578 - 929 MHz的宽-10 dB工作频段。而轴比（AR）带宽范围为490 - 810 MHz。此外，对双单元MIMO进行了优化，并将其放置在100×100×0.76 mm的紧凑尺寸上以实现方向图分集。该天线的关键特性是尺寸紧凑、宽带亚GHz工作、双极化CP、极化带宽可重构性以及良好的MIMO性能。因此，它是在亚GHz频段的立方星应用中使用的合适候选者。