Archimedean Spiral Antenna with Coplanar Waveguide Feed

Abstract

This paper presents a wideband, membrane supported spiral antenna for millimeter wave applications. The slots of a coplanar waveguide transmission line are used to obtain the two winding arms of the spiral antenna A compact 5.3x5.3 mm2 antenna is obtained with a measured input matching bandwidth larger than the 65 -110 GHz frequency range and a measured gain of 10.6 dBi. A 3D full wave electromagnetic model was developed and the simulated results are in good agreement with measurements.