Low-Profile Machined-Metal Array Radiator for Ka-Band

A simple implementation of the Frequency-scaled Ultra-wide Spectrum Element (FUSE) antenna aperture was developed for manufacturing as a self-supporting metallic structure using either subtractive or additive technologies (or a hybrid combination). This low-profile ultra-wideband array aperture is shown to be precisely built for operation from roughly 10 GHz to 40 GHz with VSWR below 2.0 for 45-degree scans in all planes for an optimally-sampled square lattice. Modeling predictions are validated with measured results.