X-Band High-speed Transmitter

X-Band High-speed Transmitter

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Low cost, low power consumption, and high performance enabled by the use of COTS hardware. Supports large volume data downlink.
  • ・ Over 500 Mbps X-Band high-speed downlink communication system for small satellites

    ・ 36.7 GB downlink volume per pass with 3.8 m ground antenna & satellite patch antenna

    ・ Low power consumption

    ・ Highly efficient use of RF bandwidth for satellite constellations (500 Mbps @ 125 MHz bandwidth)

    ・ QPSK, 8PSK, 16APSK, 32APSK, 16QAM, 64QAM, 64APSK (link budget optimization)

    ・ User defined configuration

    ・ Flight proven technology (demonstrated on two 50 kg class satellites)

    ・ GaN-HEMT power amplifier

  • Input Data Rate:
    Up to 600 Mbps
    User Data Rate:
    72-540 Mbps
    Modulation Schemes:
    QPSK, 8PSK, 16APSK, 32APSK, 64APSK, 16QAM, 64QAM
    Error Correction Code:
    SCCC (CCSDS 131.2), DVB-S2, DVBS-2X (~64APSK) (others available on request)
    Power Consumption:
    22 W @ 33 dbm
    RF Output Power:
    2 W
    DC Power:
    28 V, 22 W
    Operating Temperature Range:
    -20~+60 ℃
    1.3 kg
    120 x 100 x 73 mm
    Frequency Range:
    8025-8400 MHz
    Output Power Range:
    20-33 dBm
    Baseband Filter:
    Square root raised cosine α = 0.5
    Data Rate:
    Configurable (in flight)
    Data Input Interface:
    RF Interface:
    50 Ohm SMA
    TTC Interface:
    Radiation Tolerance:
    20k Rad
    Compliant with ITU regulations (ITU-R SA.1157-1)
    Design Life Time:
    5 years
    1. Satellite
    2. Year
    3. Developer
    4. Inclination (deg)
    5. Altitude (km)
    Satellite: HODOYOSHI-3
    Year: 2014
    Developer: The University of Tokyo
    Inclination (deg):97
    Altitude (km):600
    Satellite: HODOYOSHI-4
    Year: 2014
    Developer: The University of Tokyo
    Inclination (deg):97
    Altitude (km):620