> For the complete documentation index, see [llms.txt](https://pekasat.gitbook.io/pekasat-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pekasat.gitbook.io/pekasat-documentation/our-products/satellite-ground-station/antenna-systems.md).
# 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
