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首页> 外文期刊>International journal of aerospace engineering >Modular Design of RF Front End for a Nanosatellite Communication Subsystem Tile Using Low-Cost Commercial Components
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Modular Design of RF Front End for a Nanosatellite Communication Subsystem Tile Using Low-Cost Commercial Components

机译：使用低成本商业组件的纳米卫星通信子系统模块的射频前端的模块化设计

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摘要

In recent years, the development market for low-cost nanosatellites has grown considerably. It has been made possible due to the availability of low-cost launch vectors and the use of commercial off-the-shelf components (COTS). The satellite design standardization has also helped a great deal to encourage subsystem reuse over a number of space missions. This has created numerous opportunities for small companies and universities to develop their own nanosatellite or satellite subsystems. Most COTS components are usually not space qualified. In order to make them work and withstand the harsh space environment, they need extra effort in circuit redesign and implementation. Also, by adopting the modularity concept and the design reuse method, the overall testing and nonrecurring development cost can be significantly reduced. This can also help minimize the subsystem testing times. The RF front-end design presented in this paper is also considered one of the better and feasible choices based on the above approach. It consists of an S-band transceiver that is fully implemented using COTS components. In the transmit chain, it is comprised of the transmitting CC2510 RF matching network and a power amplifier (PA) with an RF output power of up to 33dBm which connects to an antenna using two RF switches. The receive chain starts from the antenna that is connected through two RF switches to the low-noise amplifier (LNA) that further connects to the receiving CC2510 via the RF matching network. The receiver sensitivity is -100dBm. This is a half-duplex system using the same antenna for transmitting and receiving. The receiver and transmitter chains are isolated together using two RF switches which together provide an isolation of up to 90dB at 2.4GHz. The concept behind using two RF switches is to provide better isolation from the transmit chain to the LNA. The matching network of CC2510 has been designed in a symmetric fashion to avoid any delays. All the RF COTS used have been selected according to link budget requirements. The LNA, PA, and RF switches were tested individually for compliance. The passive components used in the overall design of the matching network are chosen on the basis of minimum dimension, least parasitic behaviour, and guaranteed optimum RF matching. Also, the RF COTS used are non-CMOS which makes them more robust against space radiations associated with the LEO environment and enables them to provide a radio communication data rate of up to 500kbps in both uplink and downlink. The vacant spaces on the implemented PCB are shielded with a partial ground plane to avoid RF interference.
机译：近年来，低成本纳米卫星的开发市场已经大大增长。由于提供了低成本的发射载体并使用了商用现货组件（COTS），因此使之成为可能。卫星设计标准化还极大地鼓励了子系统在许多太空任务中的重用。这为小型公司和大学创造了许多开发自己的纳米卫星或卫星子系统的机会。大多数COTS组件通常不符合空间要求。为了使它们能够工作并承受恶劣的太空环境，他们需要在电路的重新设计和实施上付出额外的努力。此外，通过采用模块化概念和设计重用方法，可以显着降低总体测试和非重复开发成本。这也可以帮助最小化子系统测试时间。本文提出的RF前端设计也被认为是基于上述方法的更好，可行的选择之一。它包含一个使用COTS组件完全实现的S波段收发器。在发射链中，它由发射CC2510 RF匹配网络和一个具有高达33dBm的RF输出功率的功率放大器（PA）组成，该功率放大器使用两个RF开关连接到天线。接收链从通过两个RF开关连接到低噪声放大器（LNA）的天线开始，该LNA进一步通过RF匹配网络连接到接收CC2510。接收器灵敏度为-100dBm。这是使用相同天线进行发送和接收的半双工系统。接收器和发送器链通过两个RF开关隔离在一起，在2.4GHz时，它们提供高达90dB的隔离度。使用两个RF开关的原理是提供从发射链到LNA的更好隔离。 CC2510的匹配网络以对称方式设计，可以避免任何延迟。已根据链路预算要求选择了所有使用的RF COTS。 LNA，PA和RF开关分别进行了合规性测试。匹配网络整体设计中使用的无源组件是根据最小尺寸，最小寄生行为和保证最佳RF匹配来选择的。而且，所用的RF COTS是非CMOS的，这使其对与LEO环境相关的空间辐射更加健壮，并使它们能够在上行链路和下行链路中提供高达500kbps的无线电通信数据速率。实施的PCB上的空闲空间被局部接地层屏蔽，以避免RF干扰。

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  • 来源
    《International journal of aerospace engineering》 |2019年第2期|8174158.1-8174158.11|共11页
  • 作者

    Ali Haider; Ali Anwar; Mughal M. Rizwan; Reyneri Leonardo; Sansoe Claudio; Praks Jaan;

  • 作者单位

    Univ Technol, Dept Elect Engn & Technol, Nowshera 24100, Pakistan;

    Zhejiang Sci Tech Univ, Sch Informat Sci & Technol, Hangzhou 310018, Peoples R China;

    Inst Space Technol, Dept Elect Engn, Islamabad 44000, Pakistan|Aalto Univ, Sch Elect Engn, Dept Elect & Nanoengn, FI-00076 Aalto, Finland;

    Politecn Torino, Elect & Telecommun Dept, I-10129 Turin, Italy;

    Politecn Torino, Elect & Telecommun Dept, I-10129 Turin, Italy;

    Aalto Univ, Sch Elect Engn, Dept Elect & Nanoengn, FI-00076 Aalto, Finland;

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