▪️Antenna systems

X-BAND Antenna system

  • 2.4-meter prime focus antenna dish

    • Gain 44 dBi @ 8200 MHz, F/D 0.38

    • Kumar choke ring to match antenna F/D

    • X-band septum feed with WR-90 outputs

    • Circular polarization: RHCP/LHCP

    • Switchable/simultaneous receive mode

    • NF ≈ 1dB, G/T 26 dB/K

    • Integrated LNAs and downconverter (L-band IF)

  • 2-axis rotator

    • Speed up to 6°/s

    • Tracking and pointing precision 0.1°

    • AZ 0-360° with overturn, EL 0-90°

    • Limit switches in every direction

    • 24V/25A DC motors

  • SDR based modem

    • X-300 from Ettus research

    • 2x SBX-120 motherboards (each up to 200 MHz BW)

    • 2xTx, 2xRx, GPS locked LO, 10 MHz ref. output

    • Fully redundant thanks to power splitters and RF switches

  • Downlink frequencies

    • Meteorogical: 7750-7900 MHz, 125 MHz BW

    • Earth-observation: 8025-8400 MHz, 375 MHz BW

    • Space research: 8400-8500 MHz, 100 MHz BW

    • Lowest received freq. 7500 MHz (tested on Electro-L2 GEO sat.)

S-BAND Antenna system

  • 4.5 - meter prime focus mesh antena

    • Gain 38.1 dBi @ 2200 MHz, F/D 0.45

    • Septum feed with Chaparral ring

    • Circular polarization: RHCP/LHCP

    • Rx/Tx switchable

    • NF ≈ 0.5 dB, A = 30 dB

    • SSPA 100W

  • 2-axis rotator

    • Speed up to 6°/s

    • Tracking and pointing precision 0.1°

    • AZ 0-360° with overturn, EL 0-90°

    • Limit switches in every direction

    • 24V/25A DC motors

  • SDR based modem

    • B-210 from Ettus research

    • Up to 56 MHz of real-time RF bandwidth

    • 2x Rx/Tx, 2x Rx ports

    • GPS antenna IN, 10 MHz ref. OUT

  • Operating frequencies

    • Uplink: 2025-2110 MHz, 85 MHz BW

    • Downlink: 2200-2290 MHz, 90 MHz BW

UHF Antenna system

  • Antenna: 436CP30 (M2 systems)

  • PS-70CM polarization switch (RHCP/LHCP)

  • Frequency range: 432-440 MHz

  • LNA: NF=0.5 dB, A=20 dB

  • RF filter: 434 MHz, Atten. 40 dB

  • Total frontend gain 50 dB

  • Rotator: Yaesu G-5500DC

  • SDR: B210 from Ettus Research

  • SatNOGS integration supported

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