The ISIS S-band patch antenna is a part of a new generation of antennas designed for S-band communications on nanosatellites and CubeSats. It is an off the shelf compact antenna designed to complement the ISIS S-band transmitter for telemetry and payload data transmissions. The antenna is mounted onto a Rogers PCB, ideal for high-frequency RF circuitry ensuring fewer losses than traditional FR-4 PCBS. The antenna is comaptible with Cubesat form-factor Structures and platforms.