▪️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