S-Band Transceiver

S-Band Transceiver

The S-Band Transceiver (SBTRcvr) for microsat platform performs the typical on board telemetry and command functions. It is composed of two different functional sections, receiver and transmitter, and it is based onto a well consolidated analogue architecture.

Three trays, or module, stacked in vertical direction house the unit electronics:

  • Receiver
  • Transmitter
  • Reference oscillator and Interface

In term of used technologies the SBTRcvr is based on robust and standard surface mount device (SMD) manufacturing approach and high reliable FR4 and Polyammide Printed Circuit Board.

The selection of COTS devices has been made in order to have reduced sensitivity to radiation. A radiation hardness level of 10 krad has been considered as design parameter.

The modular design allows to derive from the basic design a line of COTS-based products for LEO missions as transmitter for high data rate transmission and command receiver for various modulation formats and frequency bandwidths.


Qualification and
Acceptance Testing

TestQualification TestAcceptance Test
X-Ray InspectionYesOn 
Mechanical ShockYesOn 
Thermal CyclingYesOn 
Thermal VacuumYesYes
Total Ionizing DoseYesNo

Performance Properties

Receiver Frequency2025-2150 MHz
Receiver Input Signal -65 dBm / -105 dBm
Command subcarrier2 kHz, 4 kHz
Command threshold-100 dBm
Command mod formatPM/PSK/NRZ (BPSK/QPSK option)
Transmitter frequency2200-2300 MHz
Frequency stability 20 ppm long term
Output Power 1 to 5 Watt
Modulation format
BPSK 1 Mb/s, (10 Mb/s, QPSK option)
Acquisition Tracking range±180 kHz
Power Consumption (1W RF)12 Watt
Power consumption (Rx Only)6 Watt
TelemetriesAGC, Loop Stress         AN
Lock Status                     DG
TX Out Pwr                      AN
Temperature                 AN

Physical Characteristics

Dimensions110 x 150 x 65 mm
Mass< 1 Kg
Power Consumption10 Watt @1W RF
Voltage (V)± 12 V (23V with internal DC/DC)
Op. Temperature-20°C to +60°C
Radiation< 20 Krad
Random VibrationIn accordance to ECSS
Life Time> 3 years


  • TT&C for Microsatellite
S-Band Transceiver
S-Band Transceiver