The QSP-RC-0.5-8-S-SG is a right hand circularly polarised spiral antenna that operates from 0.5 to 8 GHz. It can handle up to 2 W of input power, has a gain from -6.5 to 1.4 dBiL and a VSWR of 4:5:1. It has an axial ratio of less than 2 dB with a squint of less than 10 degrees. The antenna has a diameter of 152 mm and is 120 mm long. This antenna is ideally suited for Spectrum Management Direction Finding 360 antenna arrays and is targeted to provide high quality performance at an attractive price.