HiSPiCO is a transmitter system for S band communication links from small satellites in LEO environment. It’s a cost effective, miniaturized, low power solution for Cubesats with TRL9 achieved. The wideband downlink system provides up to 1 Mbps at frequencies 2.1 - 2.5 GHz. Optional patch antennas are available. The transmitter operates in S-band and allows for a user data rate of up to 1.6 Mbps by occupying an RF bandwidth of 1.3 MHz.A suitable planar antenna with circular polari-zation is available in addition to the transmitter. This transmission technology was prototypically qualified for a life expectancyof 2 years in LEO (low earth orbit). A specific cost-effective receiver for ground stations is available to go with the transmitter. It contains a down converter, demodulator and decoder and outputs the usage data on an Ethernet interface.