The AC-2000 from AAC Clyde Space is a Space Qualified RH/LH Circularly Polarized S-band Antenna with a 300 MHz bandwidth. It has a peak gain of 2 dBi and a VSWR of 1.5: 1.0. The antenna has an impedance of 50 Ohms. It has a mass of 100 grams and measures 2 x 2 inches. The antenna also has a built-in ground plan and can include an optional protective cover. It can be easily integrated with S-band nanosatellite payloads.