X-Band High-speed Transmitter

• Feature

  ･ 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

  
  
• Specification

  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 ℃

  Mass:

  1.3 kg

  Dimensions:

  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:

  LVDS

  RF Interface:

  50 Ohm SMA

  TTC Interface:

  RS422

  Radiation Tolerance:

  20k Rad

  Filter:

  Compliant with ITU regulations (ITU-R SA.1157-1)

  Design Life Time:

  5 years

• Flight Heritage
  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

• Documents

  ･X-Band High-speed Transmitter Brochure