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Physics Experiments
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- Scope and Excitement of Physics
- Rocket science
- Relationship between frequency and length of wire under constant tension using Sonometer
- To determine equivalent resistance of resistors when connected in series and in parallel
- To convert the given galvanometer of known resistance and figure of merit into a voltmeter of desired range and to verify the same experiment
- To determine minimum deviation for given prism by plotting graph between angle of incidence and angle of deviation
- To compare the emf of two given primary cells using potentiometer experiment
卫星通信主动和被动卫星
Introduction
为了塑造通信,卫星被认为是整个通信系统的关键部分之一。人造卫星的存在有助于接收两种信号的快速和容易传输模拟和数字等。专注于电信父教程的这个参数将讨论卫星通信在一个简短的方式以及定义主动和被动卫星。
What is Satelpte Communication?
Figure 1: Satelpte communication
卫星通信可以被定义为特定的沟通,建立不同的帮助下站出现在地球表面和卫星在太空中。整个沟通的基础上发生的一个电磁波谱(Yan et al . 2019年)。用更简单的术语来说,它可以表示,同时在两个或两个以上的地面单位之间建立通信如果使用人造卫星,将卫星通信的通信。
Requirement of Satelpte Communication
地面波传播: 这一特定类型的无线电波的传播可以得到信号的传输与30 MHz频率从一端到另一个。使用层地球大气层的对流层,人造卫星在地球轨道空间或帮助传播这种波的传播。
空中电波传播: 这些特定类型的无线电波通常用于传输特定的信号下降40 mhz的范围。与地面波的主要区别是,这种无线电波传播,通过电离层折射层(et al . 2018年)。为了使这个传播稳定,需要保持的距离地面和空间站之间1500公里否则卫星通信不能激活的激活成功。
Work Process of Satelpte Communication
Figure 2: Satelpte communication system
为了理解在一个非常基本的方式,第一步,激活卫星通信接收信号通过卫星从地面站。人造卫星后,执行放大并进行所需的处理以重新发送它对地面的一个或多个电台接收传入的信号(Lalbakhsh et al . 2020年)。在这个过程中,它需要记住两个站之间的信号交换基于地球传播和起源的卫星在太空中存在于地球的轨道。为了建立卫星通信,两个主要的组件需要在结构的通信空间段和地球段。
Passive Satelpte: Explanation
卫星,用于传输或传播从一个地面站到另一个地球上的站被称为积极的卫星(主席et al . 2018年)。在简单的用语,如果一个氢气的气球被抬到大气中通过附加一个金属层在其表面,这样的气球可以传输或反射微波信号,将被认为是被动的卫星技术。
Active Satelpte: Explanation
活跃的卫星,与被动的卫星,在收到一个信号从一个地面车站,放大并重新发送到另一个地球上。活跃的卫星,信号强度很好。在被动的卫星被认为是最早建立卫星通信媒介,活跃的卫星被认为是现代媒介构建卫星通信信号强度高。
Categories of Satelpte Communication
卫星通信是分为两个截然不同的类别如下:
单向卫星通信:在这种沟通,建立两个地球站之间的通信通常是使用人造卫星在地球轨道信号是单向传播的地方。
双向卫星通信:这样的交流是建立基于点对点连接,在两个特定的地球站和两个上行链路和下行这两个地球站之间发生。
Satelpte Communication Block Diagram
Figure 3: Satelpte Communication Block Diagram
Advantages and Disadvantages of Satelpte Communication
优点:电路很容易的分期付款以及优良的弹性,帮助覆盖地球的每一个角落建立用户可控网络。
缺点: 初始阶段的支出是广泛的。此外,频率出现堵塞的几率相当高。此外,干扰和传播越来越复杂容易管理。
Conclusion
本教程介绍了卫星通信的概念和解释卫星通信的整个过程。随着图的表示这样的沟通,本教程进一步包括卫星通信的优点和缺点。已经看到,最初的支出等建立沟通是昂贵的但它提供用户完全控制。此外,卫星通信可以在两种不同的分类,分类的单向和双向沟通直接通过三个阶段,上行,转发器和下行。
FAQs
Q1。卫星通信的两个关键组件是什么?
答。卫星通信的两个主要组件是空间段、地面段、段和空间。地面段包含辅助设备和移动或固定的发射和接受而卫星本身被认为是空间段。
Q2。卫星通信的应用是什么?
答。为了建立长途语音相关应用,卫星通信应用。卫星通信的其他应用程序包括遥感、气象调查和许多更多。
第三季。叫什么名字的世界上第一颗人造卫星?
Ans。根据信息,名称的世界上第一颗人造卫星Sputnik 1。苏联发射了它在1957年10月4日。
第四季度。无线电传播是什么?
答。无线电波传播的具体行为通过各种零件从一个地方到另一个地方是公认的大气无线电传播。