The S-Band Patch Antenna from ISISPACE is a Satellite Antenna with an S-band frequency range of 2200-2290 MHz. This patch antenna has a gain in boresight of 6.5 dBic and a half power beam width of 100 degrees. It is right-hand circularly polarized and has an axial ratio of less than 3 dB. The antenna has a mass of less than 50 g and measures 80 x 5 mm (diameter x height). It is qualification tested for quasi-static acceleration up to 15g in three axes and is compatible with mounting onto CubeSat. The antenna is designed for S-band communications on nanosatellites and CubeSats and to complement ISIS S-band radios for telemetry and payload data transmission.