S-Band Transceiver


The ISISPACE CubeSat compatible S-band Transceiver is comprised of two PCBs, designed to meet the needs of telemetry downlinks, high data-rate downlinks of up to 4.3 Mbps (usable information bit-rate at CCSDS transfer frame level) and telecommand uplinks of 9.6 kbps (AX.25). The S-band transmitter is flexible, implementing CCSDS as data link layer protocol and allowing in-flight configuration of data-rate, modulation scheme, frequency, and RF output power. The system is designed for full-duplex TT&C and Payload data downlink, a diplexer is used such that a single antenna can be used for uplink and downlink.

Dimensions: = 99 x 94 x 15 mm (transmitter PCB), 96 x 92 x 10 mm (receiver PCB)
Mass: 132g (transmitter) + 85g (receiver)
Supply voltage range: 7 to 20 V
Power consumption: Transmit mode: 13 W (for 33 dBm RF output power)
Receive-only mode: 1.2 W
Operating temperature: -40 to +70 °C
RF interfaces: SMPM connector, 50 Ohms
Payload downlink data interfaces: LVDS
Housekeeping data & uplink telecommand interface: I2C


Component Type
Form Factor
Dry Mass
0.217 kg
Average Power
13.0 W
In Production