用于L频段和S频段的低档高增益RHCP天线,使用带背抑制的矩形环元表面
Sundas Farooq Khan1, Bilal Muhammad Khan1, Tariq Mairaj Rasool Khan1
1National University of Sciences and Technology, Karachi, Pakistan.
PloS one
|February 8, 2024
概括
一个新的小型化,双层天线用于卫星通信提供高收益和提高灵敏度. 使用超表面和地面窒息技术,这种低成本,易于制造的天线非常适合L频段和S频段应用.
科学领域:
- 电磁学和天线设计
- 甲基材料和甲基表面.
- 卫星通信系统 卫星通信系统
背景情况:
- 微型天线对于便携式卫星通信设备至关重要.
- 在小型天线中实现高增益和灵敏度仍然是一个重大挑战.
- 超表面为增强天线性能提供了新的方法.
研究的目的:
- 为1.575GHz频段提供一个单源,小型化,双层天线.
- 为了提高天线性能,包括增益,灵敏度和范围.
- 为了展示一个具有成本效益和易于制造的卫星通信天线解决方案.
主要方法:
- 设计和制造带有补丁散热器和超表面层的双层天线.
- 整合了一种地面窒息技术,以抑制背叶.
- 使用FR4基板和手工制造以实现成本效益.
主要成果:
- 该天线在1.575 GHz和2.33 GHz运行,其尺寸为85.6 x 68.4 x 15.204 mm.
- 实现了5.9dBi的高增益,通过VNA和无声室测试进行验证.
- 在没有低噪音放大器 (LNA) 的情况下,成功测试了实时的L频段卫星通信.
结论:
- 开发的天线很小,成本低,容易制造.
- 超表面层显著增加了增益和系统效率.
- 该天线适用于现实世界的L频段和S频段卫星通信应用.
相关概念视频
Characteristics of Series Resonant Circuit
257
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
257
Parallel Resonance
209
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
209
Cascaded Op Amps
633
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
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Series Resonance
180
The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
180


