Astronautical Development Lithium 1 UHF Radio
Overview: The KySat-2 will be equipped with a Astronautical Development Lithium 1 UHF Radio. As a receiver, the radio will receive RF signals from antennas and filter out the information. As a transmitter, the radio will receive data from the C&DH and transmit it out as RF signals. Communications with the C&DH will be performed using the UART protocol. The radio will be directly connected to battery for transmitter and require 3.3V power from the EPS. The antennas on the KySat-2 will have circular polarization to provide a constant RF signal despite satellite orientation.
Requirements:
- Capable of communicating with C&DH 8051F912 through UART.
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Derived Requirement: 9.6kbps interface rate, 3.3V level.
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Secondary E/PO Requirement: Reduced data rate to 1200 baud
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- 3.3V power required from EPS
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Direct connection to battery for transmitter
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SMA RF connector
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> 1.5 W Tx Power
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Software Controllable UHF Frequency and Tx Power
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Multiple Modulation Modes (FSK/GMSK)
Specifications:
- Mechanical
- Mass 52 grams
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32 x 62 x 11.12mm
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3.3V UART Serial Interface
- Electrical
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FSK/GMSK Modulation
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Expected Frequency 436.795 MHz
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Max Output of 36 dBm we are using 31.5dBm
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Max power setting x 33%eff aprox. 4.5W DC power usage when Tx
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37mA @ 3.3V aprox .0125W power usage when Rx
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Data Rate of 9.6 kbps, AX.25 Protocol