The QSP-RC-18-42-K-SG is a right hand circularly polarised spiral antenna that operates from 18 GHz to 42 GHz. It can handle up to 2 W of input power, has a gain from 2.2 to 6.2 dBiC with a VSWR of less than 2:5:1. The antenna has an axial ratio of less than 2 dB and a diameter of 34.4 mm and is 55 mm long. It is ideally suited for airborne and ground based applications and Spectrum Management Direction Finding 360 antenna arrays. Steatite also provides custom designed spiral antennas and if required, integrate lensed radomes to improve performance.