一个共享光圈五带天线,具有高阻抗表面,用于CubeSat应用程序
Md Nazim Uddin1, Elias A Alwan2
1Department of Electrical and Computer Engineering, Florida International University, Miami, FL, 33174, USA. muddi027@fiu.edu.
Scientific reports
|July 12, 2024
概括
使用光圈内光圈概念的新型圆极化五带天线使立方卫星能够同时进行L频段到Ka频段的通信. 这种天线实现了5-10dBi的增益和宽带宽,以实现高效的下链操作.
科学领域:
- 电磁学和波浪传播
- 天线理论和设计.
- 航天器通信系统 航天器通信系统
背景情况:
- 立方卫星需要紧的多频带天线来满足各种通信需求.
- 现有的天线经常在广泛的频率范围内 (L频段到Ka频段) 同时运行时遇到困难.
- 循环极化对于减轻信号色和提高空间应用中的链路可靠性至关重要.
研究的目的:
- 为CubeSat应用提供一个圆极化五带波段天线.
- 为了证明五个不同的频段 (L频段到Ka频段) 的同时运行.
- 为了实现高增益和广泛的循环极化带宽,以实现高效的下行链接.
主要方法:
- 一个使用光圈内光圈 (AIA) 概念的五频带天线的设计.
- 将四个特定频段天线 (12,18.5,26,32 GHz) 集成到一个L频段 (1.5 GHz) 的天线中.
- 采用高阻抗表面 (HIS) 来增强辐射模式的稳定性.
主要成果:
- 在L频段 (1.5GHz),X频段 (12.5GHz),K频段1 (18.5GHz),K频段2 (26GHz) 和Ka频段 (32GHz) 的同时运行,其频率比为21.3:1.
- 观察到实现的增益范围为5.05dBi (L频段) 到8.56dBi (Ka频段).
- 在整个操作频率范围内保持良好的圆极化带宽 (<3dB).
- 他有效地减轻了表面波干扰引起的辐射模式波纹.
结论:
- 拟议的光圈内光圈五带天线是CubeSat下载链路的可行解决方案.
- 该天线在增益,带宽和同时多频段运行方面表现出色.
- 制造和测试证实了模拟结果,验证了天线的设计和性能.
相关概念视频
The Antenna Complex
Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...
Polar Coordinates: Problem Solving
Directional radiation patterns are central to antenna analysis, as they illustrate how signal strength varies with direction. These patterns are often modeled using polar plots, where the radial distance from the origin represents signal intensity at a given angle. A commonly used idealized form is the four-lobed rose curve, which captures the concept of directional beams in a simplified mathematical form.The four-lobed rose curve, described by r = cos(2θ), features four symmetric lobes, each...
Surface Area Calculations
Surface area calculations for a graph z = f(x, y) are fundamental in engineering applications involving curved structures such as satellite dishes. A parabolic dish reflects communication signals efficiently, but engineers must determine its exact curved surface area to estimate coating materials, fabrication costs, and structural requirements. Since the rim of the dish forms a circular boundary, the surface area is calculated over a circular domain in the xy-plane.Parametric Representation of...
Reflective Property of Parabolas
A parabola is a basic type of conic section that results from the intersection of a plane with a double-napped cone in a direction parallel to one of the cone's sides. This U-shaped curve has a distinctive reflective property: all incoming rays parallel to its axis of symmetry are directed toward a single point, known as the focus. This property is widely utilized in optical and communication technologies that require precise signal concentration.In analytic geometry, a parabola is defined as...


