本論文目的為開發立方衛星所使用之射頻收發機，本射頻收發機使用UHF 433MHz為其中心頻率，並設計將整體系統模組化。 文中提及之系統規劃，包括可自由設定中心頻率，數位調變方式，數據鮑率，功率放大器禁制能，低雜訊放大器禁制能。設計自動封包，自動解包，自動轉發，分時發送，濾除重複封包等系統，並將硬體電路設計，功能方塊，狀態機，具體實現後，達成具備星群功能之無線電收發機。 本收發機使用COTS元件構成，當發射端搭配指向型魚骨天線，接收端搭配自製UHF衛星無線電天線時，其實際無線電傳輸距離可達44公里。並且執行衛星星群通訊功能之自動轉發，分時發送，濾除重複封包等功能之可靠性。最後依結果進行討論其缺點，及改善方式。 ;The purpose of this paper is to develop the RF transceiver which use for the cubic satellite. The RF transceiver is used UHF 433MHz for its base frequency, and the whole system is designed to be modularized.
The system planning mentioned in this paper includes can setting the base frequency, the digital modulation mode, the radio baud rate, the power amplifier enable/disable, and the low noise amplifier enable/disable. Design the system of automatic packing, automatic unpacking, automatic forwarding, time-sharing, filter out duplicate packets. And realization the hardware circuit design, function block, state machine. To achieve RF transceiver for cube satellite Constellation.
The RF transceiver uses COTS components. When the RF transceiver transmit with a Yagi-Uda antenna, and receive with a self-made UHF dipole antenna. The actual radio transmission distance can up to 44 km. And implement the reliability of the satellite constellation communication function. Including automatic forwarding, time-sharing, filter out the duplicate packet. Finally, according to the results to discuss its shortcomings, and fine the improve method.
