A 60 GHz simple-to-fabricate single-layer planar Fabry–Pérot cavity antenna

A planar single-layer single-feed Fabry-Pérot cavity antenna is designed and fabricated to operate at 60 GHz. The simplicity and planarity of this design is achieved by using only a laminated and commercially available dielectric slab, forming the cavity of the antenna, and by exciting the antenna through a planar feed, that is, a coplanar-waveguide-fed slot-dipole, printed directly on the ground plane of the cavity. The backward radiation because of a feeding-slot on the ground plane of the cavity is also investigated and a new closed form formula is presented. The radiation performance of the fabricated antenna is measured using an automated measurement setup built to characterise high-gain millimetre-wave antennas being probed on the opposite side of the main radiation beam.