Communication subsystem provides a link between the satellite and ground station. 

The subsystem has the following functions

• Telemetry data Transmission equipment the satellite to the ground (downlink)
• Signaling Morse code beacon (downlink)
• Transfer control commands to the satellite (uplink)

The parameters of the Uplink communication

• The type of satellite antennas: Omni-directional antenna, 1 DB 
• Frequency range: VHF 145,96 MHz
• Signal/noise ratio: 34.3 DB
• speed and modulation type: 1.2 kb/s AFSK

Down-link options

• The type of satellite antennas: Omni-directional antenna, 1 DB
• Frequency range: UHF 436,60 MHz
• Max transmit peak power: 1 W
• Signal/noise ratio: 18.2 DB
• flow rate and modulation types BPSK 9.6 Kbps

Supply voltage, - 6.8, 3.3 V 

Power consumption channel - 436,60 MHz:

• Standby -0.056 W
• Session: - 4.5 W

The dimensions of the antenna system in folded form the 100 × 100 × 8 mm. The antenna collapsed have the form of a flat spiral.

Bronze strips vibrators deploying mechanism assumes in space after the separation of nanosatellite from flight container. 

After deploying antennas have linear form. The length of bronze strips received special heat treated to make them elastic properties. The length of bronze strips is 570 mm for receiving the operating range 144 MHz and is 175 mm for the transmitting frequency range 435 MHz.

Communication subsystem settings

RF module