Circularly polarised 0.5 to 8 GHz spiral antenna

January 23, 2015 // By Jean-Pierre Joosting
UK based designer and manufacturer, Steatite has released a new 0.5 to 8 GHz right hand or left hand circularly polarised spiral antenna fitted with an SMA type connector, designated QSP-RC-0.5-8-S-SG.

A derivative of the company’s highly successful 0.5 to 22 GHz spiral antenna, 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.

After thorough development and testing, this antenna is the latest addition to the company’s growing range of spiral antennas. These currently provide wideband performance up to 42 GHz, with either left or right hand circular polarisation.

The antenna also features 2-W continuous-wave power handling, maximum VSWR of 4.5:1 (<1.4:1 above 1 GHz), gain of 6.5 to 1.4 dBiL, and an axial ratio of <2 dB (above 1 GHz). The 3 dB beamwidth is 48 to 139 degrees, the 10 dB beamwidth is 112 to 176 degrees, and squint comes in at under 10 degrees.