A wideband endfire 9-port Vivaldi-based MIMO antenna for X-band standardized satellite applications

IF 3.1 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2026-03-01 Epub Date: 2026-01-30 DOI:10.1016/j.aeue.2026.156234

Rupam Bharati , Anvesh Pandey , Arun Kumar Saurabh , Manoj Kumar Meshram

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引用次数: 0

Abstract

This paper presents a compact wideband 9-port MIMO antenna designed for X-band standardized satellite communication systems. The proposed configuration employs nine identical Vivaldi elements arranged in a uniform endfire orientation with a shared radiating aperture on a rectangular substrate occupying an electrical area of 1.59λ₀ × 5.3λ₀ (λ₀ calculated at 6.5 GHz). Each Vivaldi element comprises a tapered microstrip feed line, a microstrip-to-slit-line transition, an exponentially tapered radiating aperture, and an oval-shaped parasitic director. A tightly integrated layout is achieved by maintaining an edge-to-edge spacing of only 0.05λ₀ between adjacent elements. The antenna exhibits measured reflection coefficients (|S_ii| < −10 dB) and inter-element isolation (|S_ij| ∈ i ≠ j < −24 dB) over 6.5–12.2 GHz, fully encompassing the standardized X-band uplink (7.9–8.4 GHz) and downlink (7.25–7.75 GHz) frequency allocations. The radiation characteristics remain highly directive and stable across the operating band, yielding peak gain and peak total efficiency of 6.6 dBi and 77.1% for elements 5, respectively. Measured results show excellent agreement with simulations. Comprehensive evaluation of both conventional and diversity metrics confirms robust wideband MIMO performance, highlighting the antenna's suitability for high-gain directional links in satellite communication, remote sensing, and Satcom-on-the-Move (SOTM) platforms.

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用于x波段标准化卫星应用的宽带端射9端口vivaldi MIMO天线

本文设计了一种用于x波段标准化卫星通信系统的小型宽带9口MIMO天线。所提出的结构采用9个相同的Vivaldi元件，排列在均匀的端射方向上，在矩形衬底上具有共享的辐射孔径，占据1.59λ0 × 5.3λ0 （λ0在6.5 GHz下计算）的电面积。每个Vivaldi元件包括一个锥形微带馈线、一个微带到狭缝线的过渡、一个指数锥形辐射孔径和一个椭圆形寄生导向器。紧密集成的布局是通过保持相邻元素之间的边到边间距仅为0.05λ0来实现的。该天线在6.5-12.2 GHz范围内具有实测反射系数（|Sii| <−10 dB）和元件间隔离度（|Sij|∈i≠j <−24 dB），完全涵盖了标准化的x波段上行（7.9-8.4 GHz）和下行（7.25-7.75 GHz）频率分配。辐射特性在整个工作波段保持高度的指导性和稳定性，元素5的峰值增益和峰值总效率分别为6.6 dBi和77.1%。实测结果与模拟结果吻合良好。对传统和分集指标的综合评估确认了宽带MIMO的强大性能，突出了天线在卫星通信、遥感和移动卫星通信（SOTM）平台中的高增益定向链路的适用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.